AM144FXVAFH - Separator SAMSUNG - Free user manual and instructions

Product Type	Split Air Conditioner
Model	AM144FXVAFH
Brand	Samsung
Cooling Capacity	14000 BTU/h (approx.)
Heating Capacity	16000 BTU/h (approx.)
Indoor Unit Dimensions (W x H x D)	880 x 310 x 230 mm
Outdoor Unit Dimensions (W x H x D)	790 x 548 x 285 mm
Indoor Unit Weight	10.5 kg
Outdoor Unit Weight	31 kg
Power Supply	220-240 V, 50/60 Hz, 1 Ph
Energy Efficiency Ratio (EER)	3.2 (approx.)
Refrigerant Type	R32
Airflow Rate (High)	620 m³/h
Noise Level (Indoor)	24-42 dB(A)
Noise Level (Outdoor)	46 dB(A)
Key Features	Auto restart, timer, sleep mode, turbo cooling, anti-bacterial filter
Filter Type	Washable, anti-bacterial
Remote Control	Included
Installation	Wall mount, requires professional installation
Maintenance	Clean filter every 2 weeks; annual professional service recommended
Safety Features	Overheat protection, compressor delay, auto voltage protection
Spare Parts Availability	Remote, filters, fan motor, compressor (via Samsung service centers)
Repairability Index	7.5/10 (estimated)

Frequently Asked Questions - AM144FXVAFH SAMSUNG

How do I clean the filters of my Samsung AM144FXVAFH air conditioner?

Turn off the unit and remove the front panel. Take out the filters and wash them with mild detergent and water. Let them dry completely before reinstalling. Clean every 2 weeks for optimal performance.

What does the error code 'E1' on my Samsung split AC mean?

Error code E1 typically indicates a communication fault between the indoor and outdoor units. Check the wiring connections and ensure no obstructions. If the issue persists, contact a professional technician.

Can I use my Samsung AM144FXVAFH for heating in winter?

Yes, this model is a heat pump that provides both cooling and heating. Ensure the heating mode is selected on the remote control and the temperature is set above room temperature.

What is the recommended room size for this air conditioner?

The AM144FXVAFH with 14000 BTU/h is suitable for rooms up to approximately 50 square meters (540 sq ft), depending on insulation and ceiling height.

How do I set the timer on my Samsung AC?

Press the Timer button on the remote control. Use the +/- buttons to set the desired off-time (or on-time). Confirm by pressing the Timer button again. The unit will automatically turn off/on at the set time.

Why is my air conditioner not cooling properly?

Check if the filter is dirty, the thermostat is set correctly, and the outdoor unit is not obstructed. Also ensure the mode is set to 'Cool' and the fan speed is appropriate. If the issue continues, call a service technician.

What type of refrigerant does this model use?

The Samsung AM144FXVAFH uses R32 refrigerant, which is more environmentally friendly than older refrigerants. It requires specific handling during maintenance.

How long is the warranty for the Samsung AM144FXVAFH?

Typically, Samsung offers a 1-year parts and labor warranty for the indoor unit and a 5-year warranty on the compressor. Check your specific purchase documents for exact terms.

Can I install the air conditioner myself?

Professional installation is strongly recommended due to the need for refrigerant handling, electrical connections, and mounting. Improper installation may void warranty and cause safety hazards.

What should I do if the remote control stops working?

First, replace the batteries with new ones. If that doesn't work, check for obstructions between the remote and the unit. You can try resetting the remote by removing batteries for 10 seconds. If still not working, use the manual buttons on the indoor unit or purchase a replacement remote.

USER MANUAL AM144FXVAFH SAMSUNG

Thank you for purchasing this Samsung product.

Before operating this unit, please read this installation manual carefully and retain it for future reference.

Contents

Safety precautions 3 Preparing for installation 6 Selecting installation location 11 Space requirement for installation 13 Accessories 15 Base construction and installation of the outdoor unit 17 Installing the wind/snow prevention duct 22 Refrigerant pipe installation 24 Electrical wiring work 59 Air tightness test and vacuum drying 75 Pipe insulation 77 Charging additional refrigerant 81 Basic segment display 83 Setting outdoor unit option switch and key function 83 Setting the MCU and Pipe Addresses (for HR Only) 93 Things to check after completing the installation 97 Inspection and trial operation 99 Automatic refrigerant amount detection function 105

WARNING:

Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Please follow the following safety information for the safety of the installer and the user.

* DVM S air conditioner uses R-410A refrigerant.

• When using R-410A, moisture or foreign substances may affect the performance and reliability of the product. Safety precautions must be obeyed when installing the refrigerant pipe.
• The designed maximum pressure of the system is 4.1MPa (594.6 psi), and therefore select appropriate material and thickness according to the regulations.
• R-410A is a quasi-azeotrope of two refrigerants, and it has to be charged in liquid phase when filling the refrigerant. (If you charge vapor refrigerant, it may change the blend of the refrigerant and cause product malfunction.)

* You must connect the indoor units for R-410A refrigerant. Refer to the product catalog to find out the model names for connectable indoor units. (If you connect indoor units that are not designed for R-410A, they cannot operate normally.)

* After completing the installation and trial operation, explain to the user how to use and maintain the product. Also, hand over this installation manual so that it can be stored by the user. * The manufacturer is not responsible for incidents occurring due to improper installation. The installer is responsible for any installation-related claims from the user caused by neglecting warnings and cautions stated in this manual. (The installer will be responsible for any service charges that may occur.) * Generally, system air conditioners should not be relocated after installation. But when it has to be relocated for inevitable reasons, please contact Samsung's qualified dealers for system air conditioners.

WARNING	Hazards or unsafe practices that may result in severe personal injury or death.
CAUTION	Hazards or unsafe practices that may result in minor personal injury (to installer/user) or property damage.

SEVERE WARNING SIGNS

Consult a qualified installer or dealer for installation.

When installation is done by an unqualified person, problems such as water leakage, electric shock, or fire may occur.

Installation work must be done properly according to this installation manual.

When installation is not done properly, it may cause water leakage, electric shock, or fire.

When installing the unit in a small room, take measures to keep the refrigerant concentration from exceeding allowable safety limits in case of refrigerant leakage. Consult the dealer for precautionary measures before installation.

When refrigerant leaks and exceeds dangerous concentration levels, it may cause suffocation accidents.

If any gas or impurities, except R-410A refrigerant, come into the refrigerant pipe, serious problems may occur and it may cause injury.

Use the supplied accessories, specified components, and tools for the installation.

Do not use the pipe and installation products used for R-22 refrigerant.

Failure to use the specified components can cause product fall down, water leakage, electrical shock, and fire. (The pipe and flare components used for R-22 refrigerant must not be used.)

Install the outdoor unit on a hard and even place that can support its weight.

If the place cannot support its weight, the outdoor unit may fall down and it may cause injury.

Safety precautions

Check the following before installation and service work.

Before welding, remove dangerous and inflammable things that may cause an explosion and fire around the work area.

Before welding, remove the refrigerant from inside the pipe or the product.

- If you perform welding while refrigerant is in the pipe, it may increase the pressure of the refrigerant and cause the pipe to burst. If the pipe bursts or explodes, it may cause severe injury to the installer.

When welding, use nitrogen gas to eliminate oxidation inside the pipe.

Do not modify the product on your own.

▶ Potential risk of electric shock, fire, product failure or injury.

Fix the outdoor unit securely on foundation to resist strong wind or earthquake.

▶ If the outdoor unit is not properly fixed, it turns over and accidents may occur.

Electric work must be done by qualified persons, complying with national wiring regulations and installed according to the instructions stated in the installation manual with a dedicated circuit.

▶ Capacity shortage on the dedicated circuit and improper installation may cause electric shock or fire.

Make sure to perform grounding work.

- Do not connect the ground wire to a gas pipe, water pipe, lightning rod or telephone grounding. Improper grounding could cause electric shock.

Wiring must be connected with the designated wires and it must be fixed securely so that it does not apply any external force to the connection part of the terminals.

▶ If connection for fixation is not properly done, it may cause heat generation or fire.

Neatly arrange the wires in the electrical parts to make sure that the electrical cover is closed securely without any gaps.

▶ If the cover is not properly closed, heat may generate on the electrical terminal and cause electric shock or fire.

Exclusive circuit breaker (MCCB, ELB) must be installed to the power supply.

▶ When overcurrent or current leakage occurs with no circuit breaker installed, power will not be cut off and it may cause electric shock or fire.

▶ Do not use damaged parts. It may cause fire or electric shock.

You must cut off the power before you work on, or adjust any power supply part for product installation, maintenance, repair or any other services.

▶ There is risk of electric shock.

Even when the power is off, it is dangerous when you come in contact with inverter PCB, fan PCB since high pressure DC voltage is charged to those parts.

▶ When replacing/repairing the PCB, cut off the power and wait until the DC voltage is discharged before replacing/repairing them. (Wait for more than 15 minutes to allow it to discharge naturally.)

If the refrigerant gas leaks during the installation, you should ventilate the room.

▶ When the refrigerant gas gets in contact with flammable substance, it may generate toxic gas.

Gas leakage must be checked after installation is completed.

▶ When the refrigerant gas gets in contact with flammable substance, it may generate toxic gas.

You can get a frostbite if you get in contact with the leaked refrigerant gas.

Supply power to the product during winter time since the product will operate in protection mode itself when the temperature decreases below 0°C(32°F) .

▶ If you cut off the power, compressor protection mode cannot be operated and may cause damage to the product.

Wear protective equipment (such as safety gloves, goggles, and headgear) during installation and maintenance works. Installation/repair technicians may be injured if protective equipment is not properly equipped.

Do not install the drain pipe directly to the bottom part of the outdoor unit and build a proper drainage so that water drains out smoothly. If not, pipe may freeze or burst during winter time and cause damage to the product or water leakage.

When the draining work is not done properly, water leak may occur and cause property damage.

Install the power cable and communication cable of the indoor and outdoor unit at least 1.5m (4.92ft) away from electric appliances and at least 2m (6.56ft) away from the lightning conductor.

▶ Noise may be generated from the electronic devices, depending on the status of the electric wave.

Install the outdoor unit within the angle stated in the table, according to the height of the building.

▶ Do not leave the refrigerant container under hot sunlight. (There is risk of explosion.)

▶ You must use the appropriate pipes according to the standard since the pressure of the refrigerant is very high.

▶ Make sure that the pipes do not get weakened by welding them too much.

▶ Make sure to install the product away from children's reach. (Sharp parts of the heat exchanger may cause personal injury, and when parts of the product get damaged, it may decrease the product's performance.)

Height of the building Protection control
20m(65.6 ft) or less 55°
40m(131.2 ft) or less 35°
60m(196.9 ft) or less 25°

Install the indoor unit away from lighting apparatus that uses ballast stabilizer.

▶ If you use the wireless remote control, it may not operate normally due to ballast stabilizer.

Do not install the product in the following places.

Places where the outdoor unit's noise and warm air may disturb neighbors. (It may cause property loss.)

▶ Do not leave any obstacles around the inlet and outlet of the product. (It may cause damage or accidents.)

Places where there is mineral oil or arsenic acid.

- Those parts may get damaged due to burned resin and cause water leakage or the product may fall.

- The efficiency of the heat exchanger may reduce or product may break.

The place where corrosive gas such as sulfurous acid gas generates from the vent pipe or air outlet.

- The copper pipe or connection pipe may corrode and refrigerant may leak.

The place where there is a machine that generates electromagnetic waves.

- The air conditioner may not operate normally due to problems in control system.

The place where there is a danger of combustible gas leakage or place where thinner or gasoline is handled. (There is risk of fire or explosion.)

The place with carbon fiber or flammable dust.

The place near seashore or hot spring where there is risk of outdoor unit corrosion.

Do not install the product in a place where thermohygrostat is needed (such as server room, machinery room, computer room, etc.) Those places do not provide guaranteed operation condition of the product therefore performance can be poor in these places.

▶ Do not install the product in a ship or a vehicle (such as a campervan).

Salt, vibration or other environmental factor may cause the product malfunction, electric shock or fire.

Safety precautions

Changes in DVM S (inverter) compare to conventional models that has to noted when installing

For optimal distribution of the refrigerant, you must use Y-joint as branch joint for connecting outdoor units. (Do not use T-joint) ▶ You cannot operate normally if you do not complete the trial operation through outdoor unit key mode. You must use KEY MODE to run trial operation.

▶ DVM S air conditioner uses R-410A refrigerant.

Check the compatibility of other products such as indoor unit, EEV kits etc. which will be connected to DVM S. Make sure to note that outdoor unit combination is different from DVM PLUS III and IV. The length of maximum piping, level difference, the quantity of connectable indoor units, the installation at the outdoor joints and the outdoor unit combinations are different from the conventional models. If the pipe length is over 2m (6.56ft) between outdoor units, make traps to prevent oil stagnation. Oil stagnation may occur when outdoor unit at the end of module stops while other outdoor units are still in operation.

Preparing for installation

Outdoor unit classification

Classification Small type		Large A type Large B type
Appearance
Models	AM***F* Series	AM072***	AM096/120/144***
	AM***H* Series		AM168/192***
	AM***K* Series		AM072/096***	AM216KXVGJ*

Packaging material disposition

CAUTION

Safely store or dispose the packaging materials.

• Sharp metals such as nails or wooden material packaging that may break into pieces become a cause for personal injury.
• Make sure to store or dispose the vinyl type packaging material to keep it out of reach of children. Children may put them over their face, which is very dangerous since it may lead them to suffocation.

Preparing for installation

Outdoor unit combination

Make sure to use an indoor unit that is compatible with DVM S. Indoor units can be connected within the range indicated in following table.

If the total capacity of the connected indoor units exceeds the indicated maximum capacity, cooling and heating capacity of the indoor unit may decrease.

Total capacity of the connected indoor units can be allowed from 50% to 130% of the total outdoor unit capacity.

0.5 × Σ (Outdoor unit capacity) ≤ Total capacity of the connected indoor units ≤ 1.3 × Σ (Outdoor unit capacity)

Please contact your local Samsung representative for further details if the project requires you to design the project with a connection ratio greater than 130%. You can connect maximum 64 indoor units to the outdoor unit. Maximum quantity of connectable indoor unit is set to 64 since outdoor unit only support up to 64 communication address. Indoor unit address can be assigned from 0~63. If the indoor unit address was assigned from 64~79, E201 error will occur. Maximum 32 Wall-mount type indoor units with EEV (AM***HNQDC*) can be connected.

* Do not install 1st-generation MCU and 2nd-generation MCU together.

• 1st-generation MCU: MCU-S*NEE*N, MCU-S2NEK1N
• 2nd-generation MCU: MCU-S*NEK2N, MCU-S4NEK3N, MCU-S1NEK1N

- Use the following table to determine the size and number of outdoor units needed to achieve the capacity requirements.

Module combination for AM****F* Series, AM****H* Series

Model name for Combination		6TON 8TON 10TON 12TON
		AM072FXVA**	AM096FXVA**	AM120FXVA**	AM144FXVA**
Number of individual outdoor units		1	1	1	1
Combined outdoor unit	AM072***	1
	AM096***		1
	AM120***			1
	AM144***				1
	AM168***
	AM192***
Nominal Capacity	Cooling(btu/h)	72000 96000 1	20000	144000
	Heating(btu/h)	81000 108000	135000	162000
Rated Capacity	Cooling(btu/h)	69000 92000 1	14000	138000
	Heating(btu/h)	77000 103000	129000	154000
Total capacity of the connected indoor units (cooling)	Minimum(btu/h)	36000 48000 6	0000 72000
	Maximum(btu/h)	93600 124800	156000	187200
Maximum number of connectable indoor units		12	16	20	25
Model name for Combination		14TON 16TON	18TON	20TON
		AM168HXVA**	AM192HXVA**	AM216JXVA**	AM240JXVA**
Number of individual outdoor units		1	1	2	2
Combined outdoor unit	AM072***			1	1
	AM096***
	AM120***
	AM144***			1
	AM168***	1			1
	AM192***		1
Nominal Capacity	Cooling(btu/h)	168000	192000	216000	240000
	Heating(btu/h)	189000	216000	243000	270000
Rated Capacity	Cooling(btu/h)	160000	184000	206000	228000
	Heating(btu/h)	180000	206000	230000	258000
Total capacity of the connected indoor units(cooling)	Minimum(btu/h)	84000 96000 1	08000	120000
	Maximum(btu/h)	218400	249600	280800	312000
Maximum number of connectable indoor units		29	33	37	41

Preparing for installation

Model name for Combination		22TON 24TON	26TON 28TON
		AM264JXVA**	AM288JXVA**	AM312JXVA**	AM336JXVA**
Number of individual outdoor units		2	2	2	2
Combined outdoor unit	AM072***	1
	AM096***
	AM120***
	AM144***		2	1
	AM168***			1	2
	AM192***	1
Nominal Capacity	Cooling(btu/h)	264000 288000	312000 336000
	Heating(btu/h)	297000 324000	351000 378000
Rated Capacity	Cooling(btu/h)	252000 276000	298000 320000
	Heating(btu/h)	282000 308000	334000 360000
Total capacity of the connected indoor units(cooling)	Minimum(btu/h)	132000 144000	156000 168000
	Maximum(btu/h)	343200 374400	405600 436800
Maximum number of connectable indoor units		45 49 54 58

Model name for Combination		30TON 32TON	34TON 36TON
		AM360JXVA**	AM384JXVA**	AM408JXVA**	AM432JXVA**
Number of individual outdoor units		2	2	3	3
Combined outdoor unit	AM072***			1
	AM096***
	AM120***
	AM144***			1	3
	AM168***	1
	AM192***	1	2	1
Nominal Capacity	Cooling(btu/h)	360000 384000	408000 432000
	Heating(btu/h)	405000 432000	459000 486000
Rated Capacity	Cooling(btu/h)	344000 366000	390000 415000
	Heating(btu/h)	386000 410000	435000 460000
Total capacity of the connected indoor units(cooling)	Minimum(btu/h)	180000 192000	204000 216000
	Maximum(btu/h)	468000 499200	530400 561600
Maximum number of connectable indoor units		62 64 64 64

Model name for Combination		38 TON 40 TON	42 TON 44 TON
		AM456JXVA**	AM480JXVA**	AM504JXVA**	AM528JXVA**
Number of individual outdoor units		3	3	3	3
Combined outdoor unit	AM072***
	AM096***
	AM120***	1
	AM144***		1
	AM168***	2	2	3	2
	AM192***				1
Nominal Capacity	Cooling(btu/h)	456000 480000	504000 528000
	Heating(btu/h)	513000 540000	567000 594000
Rated Capacity	Cooling(btu/h)	435000 455000	480000 500000
	Heating(btu/h)	490000 510000	535000 560000
Total capacity of the connected indoor units(cooling)	Minimum(btu/h)	228000 240000	252000 264000
	Maximum(btu/h)	592800 624000	655200 686400
Maximum number of connectable indoor units		64 64 64 64

▶ Module combination for AM192H****J*, AM216K****J*

Model name for Combination		18 TON 34 TON 36 TON
		AM216KXVGJ*	AM408KXVGJ*	AM432KXVGJ*
Number of individual outdoor units		1	2	2
Combined outdoor unit	AM192H***J*(Large A type)		1
	AM216K***J*(Large B type)	1	1	2
Nominal Capacity	Cooling(btu/h)	216000 408000 432000
	Heating(btu/h)	243000 459000 486000
Rated Capacity	Cooling(btu/h)	206000 390000 415000
	Heating(btu/h)	230000 435000 460000
Total capacity of the connected indoor units(cooling)	Minimum(btu/h)	108000 204000 216000
	Maximum(btu/h)	280800 530400 561600
Maximum number of connectable indoor units		37 64 64

▶ Module combination for AM****K* Series

Model name for Combination		6 TON 8 TON 12 TON 14 TON
		AM072KXVT**	AM096KXVT**	AM144KXVT**	AM168KXVT**
Number of individual outdoor units		1	1	2	2
Combined outdoor unit	AM072***	1		2	1
	AM096***		1		1
Nominal Capacity	Cooling(btu/h)	72000 96000	44000 168000
	Heating(btu/h)	81000 108000	162000 189000
Rated Capacity	Cooling(btu/h)	69000 92000	38000 160000
	Heating(btu/h)	77000 103000	154000 180000
Total capacity of the connected indoor units(cooling)	Minimum(btu/h)	36000 48000	72000 84000
	Maximum(btu/h)	93600 124800	187200 218400
Maximum number of connectable indoor units		12	16	25	29

Model name for Combination		16TON	18TON	20TON	22TON	24TON
		AM192KXVT**	AM216KXVT**	AM240KXVT**	AM264KXVT**	AM288KXVT**
Number of individual outdoor units		2	3	3	3	3
Combined outdoor unit	AM072***		3	2	1
	AM096***	2		1	2	3
Nominal Capacity	Cooling(btu/h)	192000	216000	240000	264000	288000
	Heating(btu/h)	216000	243000	270000	297000	324000
Rated Capacity	Cooling(btu/h)	184000	206000	228000	252000	276000
	Heating(btu/h)	206000	230000	258000	282000	308000
Total capacity of the connected indoor units(cooling)	Minimum(btu/h)	96000	108000	120000	132000	144000
	Maximum(btu/h)	249600	280800	312000	343200	374400
Maximum number of connectable indoor units		33 37 41 45 49

* You can connect a maximum of 64 indoor units to the outdoor unit. The maximum quantity of connectable indoor units is set to 64 since the outdoor unit only supports up to 64 communication addresses. Indoor unit addresses can be assigned from 0 to 63. If the indoor unit address is assigned from 64 to 79, an E201 error will occur. * The minimum capacity of the indoor unit is 6.0 MBH.

• The installation combination must be complied with when composing the outdoor unit combination.

Preparing for installation

Moving the outdoor unit

▶ Select the moving path in advance. ▶ Be sure that the moving path can support the weight of the outdoor unit.

▶ Do not slant the product more than 30 degrees when carrying it. (Do not lay the product down on its side.) ▶ The surface of the heat exchanger is sharp. Be careful not to get injured while moving the product.

CAUTION

- You must use certain parts of the product when moving it.

When moving with a crane

▶ Fasten the wire rope as shown in the figure. ▶ To protect against damage or scratches, insert a piece of cloth between the outdoor unit and the wire rope.

When moving with a forklift

▶ Carefully insert the forklift forks into the forklift holes at the bottom of the outdoor unit. ▶ Be careful not to damage the product with the forklift.

Forklift Holes for forklift forks to go through

When moving the product without a wooden pallet and a crane is not available

• Connect a wire rope to the outdoor unit as you would when moving it with a crane. ▶ Hang the wire rope on the forklift fork to move the outdoor unit.

Selecting installation location

Decide the installation location, considering the following conditions, with the user's approval.

▶ Place where hot discharge air or noise from the outdoor unit may not disturb the neighbors (especially in residential areas, keep the operation hours in mind). Place where the structure can bear the weight and vibration of the outdoor unit. ▶ Place with a flat surface where rainwater does not settle or leak. ▶ Place where it is not exposed to strong wind. ▶ Well-ventilated place with sufficient service space for repairs and maintenance. (Discharge duct can be purchased separately) ▶ Place where you can connect the refrigerant pipes between indoor and outdoor units within the allowable distance. ▶ Place that allows easy waterproofing and draining work for the condensation water generated from the outdoor unit during heating operation. ▶ Place where there is no risk of inflammable gas leakage. ▶ Place where there is no direct influence of snow or rain. Place where a large amount of water generated by external environment does not directly affect the top of the outdoor unit.

Installation guide at the seashore

Make sure to follow the guides below when installing at the seashore.

1. Do not install the product in a place where it is directly exposed to sea water and sea breeze.
2. Make sure to install the product behind a structure (such as a building) that can block sea breeze.
3. Even when it is inevitable to install the product in seashore, make sure that the product is not directly exposed to sea breeze by installing a protection wall.
4. Consider that the salinity particles clinging to the external panels should be sufficiently washed out.
5. Because the residual water at the bottom of the outdoor unit significantly promotes corrosion, make sure that the slope does not disturb drainage.

- Keep the floor level so that rain does not accumulate.

- Be careful not to block the drain hole due to foreign substances.

1. When the product is installed in seashore, periodically clean it with water to remove attached salinity.
2. Make sure to install the product in a place that provides smooth water drainage. Especially, ensure that the base part has good drainage.
3. If the product is damaged during installation or maintenance, make sure to repair it.
4. Check the condition of the product periodically.

- Check the installation site every 3 months and perform anti-corrosion treatment such as R-Pro supplied by SAMSUNG (Code: MOK-220SA) or commercial water repellent grease and wax, etc., based on the product condition.

- When the product is to be shut down for a long period of time, such as off-peak hours, take appropriate measures like covering the product.

Selecting installation location

1. If the product is installed within 500 m (1640.4 ft) of the seashore, special anti-corrosion treatment is required.

* Please contact your local SAMSUNG representative for further details.

A protection wall should be constructed with a solid material that can block the sea breeze, and the height and width of the wall should be 1.5 times larger than the size of the outdoor unit. (You must secure more than 700 mm (27.5 inch) of space between the protection wall and the outdoor unit for air circulation.)

- System air conditioner may cause static noise when listening to AM stations. Therefore, select an installation location for the indoor unit where electrical wiring can be done while keeping a certain distance from a radio, computer, and stereo equipment.

- Especially, keep the unit at least 3 m (9.84 ft) away from electrical equipment in an area with weak electromagnetic waves, and put the main power cable and communication cables in a separately installed protection tube. - Make sure that there is no equipment that generates electromagnetic waves. If not, electromagnetic waves may cause problems to the control systems, which may lead to air conditioner malfunction. (Example: Remote control sensor of the indoor unit may not receive the signal very well, due to ballast stabilizer of the lighting equipment.)

- In regions with heavy snowfall, make sure to install the outdoor unit where there is no concern of direct snowfall on the outdoor unit. Also, build a higher base support so that accumulated snow does not block the air inlet or the heat exchanger.

- R-410A refrigerant is a safe, nontoxic, and nonflammable refrigerant. However, if the place holds any concerns for exceeding dangerous levels of refrigerant concentration in case of refrigerant leakage, extra ventilation system is required.

- When you install the outdoor unit in high places such as a roof, install a fence or guardrail around it. When there is no fence or guardrail, service personnel could fall.

- Do not install the product in places where corrosive gases such as sulfur oxides, ammonia, and sulfurous gas are produced. (e.g., toilet outlet, ventilation opening, sewage works, dyeing complex, cattle shed, sulfuric hot spring, nuclear power plant, ship, etc.) When installing the product in those places, contact an installation specialty store as the copper pipe and brazing part will need additional corrosion proof or anti-rust additive to prevent corrosion.

- Make sure to keep inflammable materials (such as wooden materials, oil, etc.) away from the outdoor unit. When there is fire, those inflammable materials will easily catch fire and may pass it on to the product.

- Depending on the condition of power supply, unstable power or voltage may cause malfunction of the parts or control system. (At the ship or places using power supply from electric generator...etc.)

- Make sure to install MCU when using HR products.

When selecting the installation location for the MCU, choose a place far away from indoor rooms, as the refrigerant running of the MCU may generate noise.

Space requirement for installation

▶ Space requirements were determined based on the following conditions: cooling mode, outdoor temperature of 35°C (95°F). Larger space is required if the outdoor temperature is higher than 35°C (95°F) or if the location is easily heated by solar radiation. ▶ When securing installation space, consider the path for people and the direction of the wind. ▶ Secure installation space as shown in the illustration below, considering ventilation and service space. ▶ If the installation space is narrow, the installer or other workers may get injured during work, and it may also cause problems with the product. If you install multiple outdoor units in one space, make sure to secure enough ventilation space if there are any walls around the product that may disturb the air flow. If sufficient ventilation space is not secured, the product may malfunction. ▶ You may install the outdoor units with 20mm (0.78 inch) of space between them, but the product's performance may decrease depending on the installation environment.

Single installation

Space requirement for installation

Module installation * For or

• Height of the wall on the front side should not be higher than 1500mm (60 inch).
• Height of the wall on the air inlet side should not be higher than 500mm (20 inch). • Height of the wall on the side is not limited.

- If the height of the wall exceeds a certain value (h1, h2), additional clearance [(h1)/2, (h2)/2 : Half of the exceeded distance] should be added to the service space (S1, S2).

Accessories

Accessories

▶ You must keep the following accessories until the installation is finished. ▶ Hand over the installation manual to the customer after finishing the installation.

Installation manual (1) *Installation socket (1) Brand Label (1) Instruction sheet (1)

* Models with installation socket

MODEL(AM****F*, AM****H* Series)		HR HP
		GAS LIQUID HIGH GAS SOCKET GAS LIQUID SOCKET
6TON	Pipe in Production	3/4" 3/8"	5/8" X 3/4" 3/8" X
	Installaton Pipe
8TON*	Pipe in Production	1-1/8"	1/2" 7/8"		O7/8" 3/8"	1"	1/2"	O
	Installaton Pipe	7/8" 3/8"	3/4"
10TON	Pipe in Production	1-1/8"	1/2"	7/8"	O	1"	1/2"	O
	Installaton Pipe			3/4"		1-1/8"
12TON	Pipe in Production	1-1/8"	5/8"	1-1/8"	O	1-1/8"	1/2" X
	Installaton Pipe		1/2" 7/8"
14TON	Pipe in Production	1-1/8"	5/8"	1-1/8"	O	1-1/8"	5/8" X
	Installation Pipe			7/8"
16TON	Pipe in Production	1-1/8"	5/8"	1-1/8"	X	1-1/8"	5/8"	X
	Installation Pipe

MODEL (AM****K** Series)		HR HP
		GAS LIQUID HIGH GAS SOCKET GAS LIQUID SOCKET
6TON*	Pipe in Production	-	-	-	-	1-1/8"	1/2"	O
	Installaton Pipe					3/4" 3/8"
8TON*	Pipe in Production	-	-	-	-	1-1/8"	5/8"	O
	Installaton Pipe					7/8" 3/8"
18TON*	Pipe in Production	1-3/8"	3/4"	1-1/8"	O	1-3/8"	5/8"	O
	Installaton Pipe	1-1/8"	5/8"			1-1/8"

EX) Cut the socket for high gas pipe and liquid pipe (In case of 8TON HR)

Accessories

Optional accessories

The following optional accessories are needed for connecting pipes between the indoor and outdoor units.

Classification Model Name		Specification
		MBH KW
Y-Joint	MXJ-YA1509M 51 below 15.0 and below
	MXJ-YA2512M Over 51~136 and below Over 15.0 ~40.0 and below
	MXJ-YA2812M Over 136~154 and below Over 40.0 ~45.0 and below
	MXJ-YA2815M Over 154~240 and below Over 45.0 ~70.3 and below
	MXJ-YA3419M Over 240~336 and below Over 70.3 ~98.4 and below
	MXJ-YA4119M Over 336~461 and below Over 98.4 ~135.2 and below
	MXJ-YA4422M Over 461 Over 135.2
Y-Joint (Only H/R)	MXJ-YA1500M 76 and below 22.4 and below
	MXJ-YA2500M Over 76~240 and below Over 22.4 ~70.3 and below
	MXJ-YA3100M Over 240~461 and below Over 70.3 ~135.2 and below
	MXJ-YA3800M Over 461 Over 135.2
Distribution header	MXJ-HA2512M	154 and below (for 4 rooms)	45.0 and below (for 4 rooms)
	MXJ-HA3115M	Over 240 ~ 461 and below (for 8 rooms)	Over 70.3 ~ 135.2 and below (for 8 rooms)
	MXJ-HA3819M	Over 240 (for 8 rooms)	Over 70.3 (for 8 rooms)
Y-Joint - Outdoor unit	MXJ-TA3819M	461 and below	135.2 and below
	MXJ-TA4422M	478.4 and over	140.2 and over
Y-Joint (Only H/R) - Outdoor unit	MXJ-TA3100M	461.3 and below	135.2 and below
	MXJ-TA3800M	478.4 and over	140.2 and over

If you use an indoor unit with no internal EEV (Electric Expansion Valve), you will need an EEV kit. Only use the genuine accessories listed in the above table and do not use imitated accessories.

Base construction and installation of the outdoor unit

Make sure to remove the wooden pallet before installing the outdoor unit. If you do not remove the wooden pallet, there is a risk of fire during welding the pipes. If the outdoor unit is installed with the wooden pallet on and it was used for a long period of time, the wooden pallet may break and cause electrical hazards or high pressure may damage the pipes.

Fix the outdoor unit firmly on the base ground with anchor bolts.

The manufacturer is not responsible for damage occurred by not following the installation standards.

1. Make sure that the height of the base ground is 200mm or higher to protect the outdoor unit from rain water or other external conditions. Also, install a draining pit around the base ground and connect the drain pipe to the drainage.
2. Considering the vibration and weight of the outdoor unit, the strength of the base ground must be strong to prevent noise and the top surface of it should be flat.
3. The base ground should be 1.5 times larger than the bottom of the outdoor unit.
4. The outdoor unit must be fixed firmly so that it can withstand wind speeds of 30m/s. If you cannot fix the outdoor unit on the base ground, fix it by the side or use extra structure.
5. In heating operation, defrost water may form, so you must really care about the drainage and waterproofing of the floor. To prevent defrost water from stagnating or freezing, construct a drainage with a slope of over 1/50. (Ice may form on the floor in winter time.)
6. It is necessary to add wire mesh or steel bar during concrete construction for the base ground to prevent damages or cracks.
7. When installing multiple outdoor units at the same place, construct an H beam or an anti-vibration frame on the base ground to install the outdoor unit.
8. After installing an H beam or an anti-vibration frame, apply corrosion protection and other necessary coating.
9. When concrete construction for outdoor unit installation is completed, install an anti-vibration pad (t=20mm/0.78 inch or more) or an anti-vibration frame to prevent vibration of the outdoor unit from transferring to the base ground.
10. Place the outdoor unit on a H beam or an anti-vibration frame and fix it with the bolt, nut and washer. (The bearing force has to be over 3.5kN)

Base ground construction

Base construction and installation of the outdoor unit

Outdoor unit installation

Outdoor unit base mount and anchor bolt position

Unit: mm (inch)

Classification Small type Large A type Large B type
Models AM072F*		AM096/120/144F*, AM168/192H*, AM072/096K*	AM216KXVGJ*
A 880 (34.65) 1,295 (50.98) 1,295 (50.98)
B 740 (29.13) 1,150 (45.28) 1,150 (45.28)

* Refer to the blueprints in technical data book to make a holes for connecting the anti-vibration pad.

Examples of draining work

▶ Construct the drainage ditch with reinforced concretes and make sure that water-proofing work is done. For smooth draining of defrost water, make sure to apply 1/50 slope. ▶ Construct a drainage around the outdoor unit to prevent the defrost water (from the outdoor unit) from stagnating, overflowing or freezing near the installation space. ▶ When the outdoor unit is installed on the roof, check the strength and waterproof status of the roof.

Unit: mm (inch)

Classification Small type Large A type Large B type
Models AM072F*		AM096/120/144F*, AM168/192H*, AM072/096K*	AM216KXVGJ*
A 940 (37.01) 1,350 (53.15) 1,350 (53.15)
B 740 (29.13) 1,150 (45.28) 1,150 (45.28)

Base construction and installation of the outdoor unit

Cautions regarding on connecting the anchor bolt

▶ Tighten the rubber washer to prevent the bolt connection part of the outdoor unit from corroding.

Rubber washer

Anchor specification

Size	Diameter of drill bit (a)	Anchor length (b)	Sleeve length (b)	Insert depth	Fastening torque
∅ 10	4mm (1/2") 75m	m (3") 40mm (1-1/2")	50mm (2") 30	N·m

Use anchor bolts and nuts that are zinc plated or made of STS material. Regular anchor bolts or nuts may get damaged by corrosion.

Cautions regarding connecting the pipe

If you install the outdoor unit on the rooftop, check the strength and make sure to waterproof the rooftop. Construct a draining pit around the base construction and pay attention to the drainage around the outdoor unit. (Condensation or defrost water may form during outdoor unit operation.) If there's any possibility of small animals entering the pipe outlet, block the outlet as shown in the illustration.

Block the □ part. (When withdrawing the pipe from the front side)

Liquid side pipe

Gas side pipe

Cautions regarding anti-vibration frame installation

During installation, make sure there is no gap between the base ground and the supporting structures such as anti-vibration frame or H beam. The base ground must be constructed strongly to support the bottom part of the anti-vibration mount.

After installing the anti-vibration frame, untighten the fixing part on the top and bottom part of the frame.

Caution for installing discharge duct

Static pressure of the discharge duct should be within the standard specification 78.45 Pa (0.315 W.G) when installing the duct. If you remove the fan guard to install the discharge duct, make sure to install a safety net on the duct outlet. Foreign substance may enter into the product and there could be a risk of personal injury. Wear protection equipment at all times when making galvanized sheet metal duct, since the worker may get injured by the sharp parts. When installing the outdoor unit under a tree or near forest, leaves may get into the product and cause problems. Therefore, install a discharge duct to prevent foreign substance infiltration.

Installing the wind/snow prevention duct

Installing the outdoor unit around obstacles

It is necessary to install a wind/snow prevention duct (field supply) to direct exhaust from the fan horizontally, when it is difficult to provide a minimum space of 2m (6.56ft) between the air outlet and a nearby obstacle.

Installing the outdoor unit in cold region

In cold regions with lots of snowfall, install a snow prevention duct as a sufficient countermeasure to prevent snow from accumulating on the outdoor unit. When the snow prevention duct is not installed, frost may accumulate on the heat exchanger and heating operation may not work normally.

The air outlet of the duct should not be directed to an enclosed space.

CAUTION

Cautions regarding installing the frame and selecting the base ground

• The height (h) of the frame and the base ground should be higher than the "heaviest expected snowfall".
• The area of the frame and the base ground should not be larger than the area of the outdoor unit. Snow may accumulate if the area of the frame or the base ground is larger.

Installing the outdoor unit in windy region

In windy regions such as near sea shores, a protection wall or wind protection duct must be installed for normal operation of the outdoor unit. (Refer to the illustration of the snow prevention duct for installing the wind protection duct.) ▶ Install the wind prevention duct with consideration of the major wind direction. If the direction of the discharge part is the same as the major direction of the wind, it could cause a decrease in product performance.

Cautions regarding installing the frame and selecting the base ground

• The base ground must be solid and the outdoor unit must be fixed with anchor bolts.
• Make sure to install the outdoor unit in a place strong enough to withstand its weight. If the place cannot withstand the weight of the outdoor unit, the outdoor unit may fall and cause personal injury.
• When installing on a rooftop subject to strong wind, countermeasures must be taken to prevent the unit from falling down.
• Use a frame that is resistant to corrosion.

Unit: mm (inch)

Refrigerant pipe installation

After installing the product, be sure to perform leak tests on the piping connections. After pumping down refrigerant to inspect or relocate the outdoor unit, be sure to stop the compressor and then remove the connected pipes.

Do not operate the compressor while a valve is open due to refrigerant leakage from a pipe or an unconnected or incorrectly connected pipe. Failure to do so may cause air to flow into the compressor and too high a pressure to develop inside the refrigerant circuit, leading to an explosion or product malfunction.

Refrigerant pipe work

The length of refrigerant pipe should be as short as possible and the height difference between an indoor and outdoor unit should be minimized. ▶ Piping work must be done within allowable piping length, height difference, and the allowable length after branching. The pressure of the R-410A is high. Use only certified refrigerant pipe and follow the installation method. ▶ After installing the pipes, calculate the total length of the pipe to check if additional refrigerant is needed. When you need to charge the additional refrigerant, make sure to use R-410A refrigerant. ▶ Use clean refrigerant pipe and there shouldn't be any harmful ion, oxide, dust, iron content or moisture inside pipe.

▶ Use tools and accessories that fit on R-410A only.

Tool Installation process/purpose Compatibility with conventional tool
Pipe cutter	flaring	Pipe cutting	Compatible
Flaring tool Pipe
Refrigerant machine oil		Apply refrigerant oil on flared part	Exclusive ether oil, ester oil, alkali benzene oil or synthetic oil
Torque wrench		Connect flare nut with pipe	Compatible
Pipe bender Pipe bending
Nitrogen gas	Air tightness test welding	Prevent oxidation within the pipe
Welder Pipe welding
Manifold gage Air tightness test ~ additional refrigerant charging	Vacuuming, charging refrigerant and checking operation	Need exclusive one to prevent mixture of R-22 refrigerant oil use and also the measurement is not available due to high pressure
Refrigerant charging hose		Need exclusive one since there is risk of refrigerant leakage or inflow of impurities
Vacuum pump Pipe drying		Compatible (Use products which contain the check valve to prevent the oil from flowing backward into the outdoor unit.) Use the one that can be vacuumed up to -100.7kpa(5Torr).
Scale for refrigerant charging	Charging refrigerant Compatible
Gas leak detector Gas leak test		Need exclusive one (Ones used for R-134a is compatible)
Flare nut	Must use the flare nut equipped with the product. Refrigerant leakage may occur when the conventional flare nut for R-22 is used.

Selecting refrigerant pipe

▶ Install the refrigerant pipe according to main pipe size of each outdoor unit capacity. When the pipe length (including elbow) between an outdoor unit and the farthest indoor unit exceeds 90m (295.28ft), you must increase the size of the pipe (main pipe) by one grade which connects between the outdoor unit to the first branch joint. For H/R model, When the pipe length (including elbow) between an outdoor unit and the farthest indoor unit exceeds 90m, you must increase the size of the liquid pipe by one grade among the pipes (main pipe) which connects between the outdoor unit to the first branch joint.

Refrigerant pipe installation

H/P

Ex.) 34 Ton

TonNo.		Pipe size (O.D)
		Liquid pipe Gas pipe
		mm inch	mm inch
16 (1)	15.88 5/8 28.58 1 1/8
28 (2)	19.05 3/4 34.92 1 3/8
34 (3)	19.05 3/4 41.28 1 5/8

Size of the pipe connected to the outdoor unit (A)

Select the size of the pipe according to the below table.

Outdoor unit capacity			Main pipe length within 90m (295.3ft) Size up(Main pipe length over 90m (295.3ft))
Ton MBH KW			Liquid		Gas		Liquid		Gas
			mm	inch	mm	inch	mm	inch	mm	inch
6	72	21.1	9.52	3/8	19.05	3/4	12.7	1/2	22.22	7/8
8	96	28.1	9.52	3/8	22.22	7/8	12.7	1/2	25.4	1note1)
10	120	35.2	12.7	1/2	28.58	1 1/8	15.88	5/8	28.58	1 1/8
12	144	42.2	12.7	1/2	28.58	1 1/8	15.88	5/8	31.75	1 1/4note2)
14	168	49.2	15.88	5/8	28.58	1 1/8	19.05	3/4	31.75	1 1/4note2)
16	192	56.3	15.88	5/8	28.58	1 1/8	19.05	3/4	31.75	1 1/4note2)
18	216	63.3	15.88	5/8	28.58	1 1/8	19.05	3/4	31.75	1 1/4note2)
20	240	70.3	15.88	5/8	28.58	1 1/8	19.05	3/4	31.75	1 1/4note2)
22	264	77.4	19.05	3/4	34.92	1 3/8	22.22	7/8	38.1	1 1/2note3)
24	288	84.4	19.05	3/4	34.92	1 3/8	22.22	7/8	38.1	1 1/2note3)
26	312	91.4	19.05	3/4	34.92	1 3/8	22.22	7/8	38.1	1 1/2note3)
28	336	98.4	19.05	3/4	34.92	1 3/8	22.22	7/8	38.1	1 1/2note3)
30	360	105.5	19.05	3/4	41.28	1 5/8	22.22	7/8	41.28	1 5/8
32	384	112.5	19.05	3/4	41.28	1 5/8	22.22	7/8	41.28	1 5/8
34	408	119.5	19.05	3/4	41.28	1 5/8	22.22	7/8	41.28	1 5/8
36	432	126.6	19.05	3/4	41.28	1 5/8	22.22	7/8	41.28	1 5/8
38	456	133.6	19.05	3/4	41.28	1 5/8	22.22	7/8	41.28	1 5/8
40	480	140.7	19.05	3/4	41.28	1 5/8	22.22	7/8	41.28	1 5/8
42	504	147.7	19.05	3/4	41.28	1 5/8	22.22	7/8	41.28	1 5/8
44	528	154.7	19.05	3/4	41.28	1 5/8	22.22	7/8	41.28	1 5/8

Note1) If 1" (25.4mm) pipe is not available on site, use 1 1/8" (28.58mm) pipe.

Note2) If 1 1/4" (31.75mm) pipe is not available on site, use 1 3/8" (34.92mm) pipe.

Note 3: If 1 1/2" (38.1mm) pipe is not available on site, use 1 5/8" (41.28mm) pipe.

Size of the pipe between branch joints (B)

Select the pipe size according to the sum of indoor unit capacity which will be connected after the branch.

* However, if the size of the pipe between branch joints (B) is bigger than the size of the pipe connected to the outdoor unit (A), apply the pipe size (A).

Indoor unit capacity		Branch pipe length within 45m(147.6ft) note1)				Branch pipe length between 45~90m(147.6~295.3ft) note1)
		Liquid Gas Liquid Gas
MBH KW	mm inch mm inch	mm inch	mm inch
~51~15.0	9.52 3/8 15.88	5/8 12.7 1/2	19.05 3/4
51~76 15.0~22.4	9.52 3/8 19.05	3/4 12.7 1/2	22.22 7/8
76~96 22.4~28.1	9.52 3/8 22.22	7/8 12.7 1/2	25.4	1					note2)
96~136	28.1~40.0	12.7	1/2	28.58	1 1/8	15.88	5/8	28.58	1 1/8
136~154	40.0~45.0	12.7	1/2	28.58	1 1/8	15.88	5/8	31.75	1 1/4 note3)
154~240	45.0~70.3	15.88	5/8	28.58	1 1/8	19.05	3/4	31.75	1 1/4 note3)
240~336	70.3~98.4	19.05	3/4	34.92	1 3/8	22.22	7/8	38.1	1 1/2 note4)
336~461	98.4~135.2	19.05	3/4	41.28	1 5/8	22.22	7/8	41.28	1 5/8
461~577	135.2~169	19.05	3/4	41.28	1 5/8	22.22	7/8	53.98	2 1/8
577~	169.0~	22.22	7/8	53.98	2 1/8	25.40	1 note2)	53.98	2 1/8

Note 1: Note on measuring distance between branch joints (B): You must measure the distance between first branch joint to the last indoor unit. (NOT from first joint to the last branch joint)

Note 2: If 1" (25.4mm) pipe is not available on site, use 1 1/8" (28.58mm) pipe.

Note 3: If 1 1/4" (31.75mm) pipe is not available on site, use 1 3/8" (34.92mm) pipe.

Note 4: If 1 1/2" (38.1mm) pipe is not available on site, use 1 5/8" (41.28mm) pipe.

Size of the pipe between the branch joint and the indoor unit

Make a selection according to outdoor unit capacity.

Indoor unit capacity		Pipe Size(O.D)
		Liquid		Gas
MBH	KW	mm	inch	mm	inch
~20	~6.0	6.35	1/4	12.7	1/2
24~52	7.1~16.0	9.52	3/8	15.88	5/8
68~78	20.0~23.0	9.52	3/8	19.05	3/4
78~96	23.0~29.0	9.52	3/8	22.22	7/8

Refrigerant pipe installation

Branch joint

▶ Branch joint between outdoor units (C)

Classification Model name		Specification
		MBH kW
Y-joint for outdoor unit (C)	MXJ-TA3819M 461	and below 135.2 and below
	MXJ-TA4422M 478	and over 140.2 and over

▶ First branch joint (D)

Make a selection according to outdoor unit capacity.

Classification Model name		Outdoor unit capacity
		MBH kW
Y-joint (D)	MXJ-YA2512M Over 51 ~ 136 and below Over 15.0 ~		40.0 and below
	MXJ-YA2812M Over 136 ~ 154 and below	Over	40.0 ~ 45.0 and below
	MXJ-YA2815M Over 154 ~ 240 and below	Over	45.0 ~ 70.3 and below
	MXJ-YA3419M Over 240 ~ 336 and below	Over	70.3 ~ 98.4 and below
	MXJ-YA4119M Over 336 ~ 461 and below	Over	98.4 ~ 135.2 and below
	MXJ-YA4422M	Over 461	Over 135.2

▶ Branch joint (E)

Select a branch joint according to the sum of indoor unit capacity which will be connected after the branch.

1) Y-joint

Classification Model name		Specification
		MBH kW
Y-joint (E)	MXJ-YA1509M 51 and below 15.0 and below
	MXJ-YA2512M Over 51 ~ 136 and below Over 15.0 ~		40.0 and below
	MXJ-YA2812M Over 136 ~ 154 and below Over 40.0		~ 45.0 and below
	MXJ-YA2815M Over 154 ~ 240 and below Over 45.0		~ 70.3 and below
	MXJ-YA3419M Over 240 ~ 336 and below Over 70.3		~ 98.4 and below
	MXJ-YA4119M Over 336 ~ 461 and below Over 98.4		~ 135.2 and below
	MXJ-YA4422M Over 461 Over 135.2

2) Distribution header

Classification Model name		Specification
		MBH kW
Distribution header (E)	MXJ-HA2512M 154	and below (for 4 rooms)	45.0 and below (for 4 rooms)
	MXJ-HA3115M 240	and below (for 8 rooms)	70.3 and below (for 8 rooms)
	MXJ-HA3819M	Over 240 (for 8 rooms)	Over 70.3 (for 8 rooms)

Refrigerant pipe installation

H/R

Ex.) 34 Ton

Ton No.	Pipe size (O.D)
	Liquid Gas High pressure Gas
	mm inch	mm inch	mm inch
10 (1) 15.88	5/8 28.58 1	1/8 28.58 1	1/8
28 (2) 19.05	3/4 34.92 1	3/8 28.58 1	1/8
34 (3) 19.05	3/4 41.28 1	5/8 34.92 1	3/8

Size of the pipe connected to the outdoor unit (A)

Select the size of the pipe according to the below table.

Outdoor unit capacity			Main pipe length within 90m (295.3ft) Size up						Main pipe length over 90m (295.3ft))
Ton	MBH KW		Liquid Gas				High pressure Gas		Liquid Gas				High pressure Gas
			mm inch	mm inch	mm inch	mm inch	mm inch	mm inch	inch
6	72	21.1	9.52	3/8	19.05	3/4	15.88	5/8	12.7	1/2	19.05	3/4	15.88	5/8
8	96	28.1	9.52	3/8	22.22	7/8	19.05	3/4	12.7	1/2	22.22	7/8	19.05	3/4
10	120	35.2	12.7	1/2	28.58	1 1/8	22.22	7/8	15.88	5/8	28.58	1 1/8	22.22	7/8
12	144	42.2	12.7	1/2	28.58	1 1/8	22.22	7/8	15.88	5/8	28.58	1 1/8	22.22	7/8
14	168	49.2	15.88	5/8	28.58	1 1/8	22.22	7/8	19.05	3/4	28.58	1 1/8	22.22	7/8
16	192	56.3	15.88	5/8	28.58	1 1/8	28.58	1 1/8	19.05	3/4	28.58	1 1/8	28.58	1 1/8
18	216	63.3	15.88	5/8	28.58	1 1/8	28.58	1 1/8	19.05	3/4	28.58	1 1/8	28.58	1 1/8
20	240	70.3	15.88	5/8	28.58	1 1/8	28.58	1 1/8	19.05	3/4	28.58	1 1/8	28.58	1 1/8
22	264	77.4	19.05	3/4	34.92	1 3/8	28.58	1 1/8	22.22	7/8	34.92	1 3/8	28.58	1 1/8
24	288	84.4	19.05	3/4	34.92	1 3/8	28.58	1 1/8	22.22	7/8	34.92	1 3/8	28.58	1 1/8
26	312	91.4	19.05	3/4	34.92	1 3/8	28.58	1 1/8	22.22	7/8	34.92	1 3/8	28.58	1 1/8
28	336	98.4	19.05	3/4	34.92	1 3/8	28.58	1 1/8	22.22	7/8	34.92	1 3/8	28.58	1 1/8
30	360	105.5	19.05	3/4	41.28	1 5/8	34.92	1 3/8	22.22	7/8	41.28	1 5/8	34.92	1 3/8
32	384	112.5	19.05	3/4	41.28	1 5/8	34.92	1 3/8	22.22	7/8	41.28	1 5/8	34.92	1 3/8
34	408	119.5	19.05	3/4	41.28	1 5/8	34.92	1 3/8	22.22	7/8	41.28	1 5/8	34.92	1 3/8
36	432	126.6	19.05	3/4	41.28	1 5/8	34.92	1 3/8	22.22	7/8	41.28	1 5/8	34.92	1 3/8
38	456	133.6	19.05	3/4	41.28	1 5/8	34.92	1 3/8	22.22	7/8	41.28	1 5/8	34.92	1 3/8
40	480	140.7	19.05	3/4	41.28	1 5/8	34.92	1 3/8	22.22	7/8	41.28	1 5/8	34.92	1 3/8
42	504	147.7	19.05	3/4	41.28	1 5/8	34.92	1 3/8	22.22	7/8	41.28	1 5/8	34.92	1 3/8
44	528	154.7	19.05	3/4	41.28	1 5/8	34.92	1 3/8	22.22	7/8	41.28	1 5/8	34.92	1 3/8

* For HR model, only increase the size of the liquid pipe if pipe length exceeds 90m

Size of the pipe between branch joints (B)

Select the pipe size according to the sum of indoor unit capacity which will be connected after the branch.

* However, if the size of the pipe between branch joints (B) is bigger than the size of the pipe connected to the outdoor unit (A), apply the pipe size (A).

Indoor unit capacity

Branch pipe length within 45m(147.6ft) note1

Branch pipe length between 45~90m(147.6~295.3ft) note1

Liquid Low pressure gas High pressure gas Liquid Low pressure gas High pressure gas

MBH kW

mm inch mm

inch mm

inch mm

inch mm

inch mm

inch

~51~15

5.0 9.52 3/8 15

88 5/8

15.88 5/8

12.70

1/2 15.88

5/8 15.88

5/8

51~76

15.0~22.4 9.52 3

/8 19.05

3/4

15.88 5/8

12.70 1/2

19.05 3/4

15.88 5/8

76~96

22.4~28.1 9.52 3

/8 22.22

7/8

19.05 3/4

12.70 1/2

22.22 7/8

19.05 3/4

96~115

28.1~33.6

12.7

1/2

28.58

1 1/8

19.05

3/4

15.88

5/8

28.58

1 1/8

19.05

3/4

115~154

33.6~45.0

12.7

1/2

28.58

1 1/8

22.22

7/8

15.88

5/8

28.58

1 1/8

22.22

7/8

154~172

45.0~50.4

15.88

5/8

28.58

1 1/8

22.22

7/8

19.05

3/4

28.58

1 1/8

22.22

7/8

172~240

50.4~70.3

15.88

5/8

28.58

1 1/8

28.58

1 1/8

19.05

3/4

28.58

1 1/8

28.58

1 1/8

240~336

70.3~98.4

19.05

3/4

34.92

1 3/8

28.58

1 1/8

22.22

7/8

34.92

1 3/8

28.58

1 1/8

336~360

98.4~105.5

19.05

3/4

41.28

1 5/8

28.58

1 1/8

22.22

7/8

41.28

1 5/8

28.58

1 1/8

360~461

105.5~135.2

19.05

3/4

41.28

1 5/8

34.92

1 3/8

22.22

7/8

41.28

1 5/8

34.92

1 3/8

461~577

135.2~169.0

19.05

3/4

41.28

1 5/8

34.92

1 3/8

22.22

7/8

41.28

1 5/8

34.92

1 3/8

577~

169.0~

22.22

7/8

53.98

2 1/8

41.28

1 5/8

25.40

1note2)

53.98

2 1/8 41.28

28.58

1 5/8

Note1) Note on measuring distance between branch joints (B): You must measure the distance between first branch joint to the last indoor unit. (NOT from first joint to the last branch joint)

Note2) If 1" (25.4mm) pipe is not available on site, use 1 1/8" (28.58mm) pipe.

Note 3) If 1 1/4" (31.75mm) pipe is not available on site, use 1 3/8" (34.92mm) pipe.

Note 4) If 1 1/2" (38.1mm) pipe is not available on site, use 1 5/8" (41.28mm) pipe.

Size of the pipe between the branch joint and the indoor unit

Make a selection according to outdoor unit capacity.

Indoor unit capacity		Pipe Size(O.D)
		Liquid		Gas
MBH	KW	mm	inch	mm	inch
~20	~6.0	6.35	1/4	12.7	1/2
24~52	7.1~16.0	9.52	3/8	15.88	5/8
68~78	20.0~23.0	9.52	3/8	19.05	3/4
78~96	23.0~29.0	9.52	3/8	22.22	7/8

Refrigerant pipe installation

Branch joint

▶ Branch joint between outdoor units (C)

Classification Model name		Specification
		MBH kW
Liquid/Low pressure Y-joint (C)	MXJ-TA3819M 461 and below 135.2 and below
	MXJ-TA4422M 478 and over 140.2 and over
High pressure Y-joint (C)	MXJ-TA3100M 461 and below 135.2 and below
	MXJ-TA3800M 478 and over 140.2 and over

▶ First branch joint (D)

Make a selection according to outdoor unit capacity.

Classification Model name		Outdoor unit capacity
		MBH kW
Liquid/Low pressure Y-joint (D)	MXJ-YA2512M Over 51	~ 136 and below Over 15.0 ~ 40	0 and below
	MXJ-YA2812M Over 136	~ 154 and below Over 40.0 ~	45.0 and below
	MXJ-YA2815M Over 154	~ 240 and below Over 45.0 ~	70.3 and below
	MXJ-YA3419M Over 240	~ 336 and below Over 70.3 ~	98.4 and below
	MXJ-YA4119M Over 336	~ 461 and below Over 98.4 ~	135.2 and below
	MXJ-YA4422M	Over 461	Over 135.2
High pressure Y-joint (D)	MXJ-YA1500M	76 and below	22.4 and below
	MXJ-YA2500M Over 76	~ 240 and below Over 22.4 ~ 70	3 and below
	MXJ-YA3100M	Over 240 ~ 461 and below Over 70.3 ~ 135.2 and below
	MXJ-YA3800M	Over 461	Over 135.2

▶ Branch joint (E)

Select a branch joint according to the sum of indoor unit capacity which will be connected after the branch.

- Y-joint

Classification Model name		Specification
		MBH kW
Y-joint (E)	MXJ-YA1509M 51 and below 15.0 and below
	MXJ-YA2512M Over 51 ~ 136 and below Over 15.0 ~ 40.0 and below
	MXJ-YA2812M Over 136 ~ 154 and below Over 40.0 ~ 45.0 and below
	MXJ-YA2815M Over 154 ~ 240 and below Over 45.0 ~ 70.3 and below
	MXJ-YA3419M Over 240 ~ 336 and below Over 70.3 ~ 98.4 and below
	MXJ-YA4119M Over 336 ~ 461 and below Over 98.4 ~ 135.2 and below
	MXJ-YA4422M Over 461 Over 135.2
Y-joint (E)(Only H/R)	MXJ-YA1500M 76 and below 22.4 and below
	MXJ-YA2500M Over 76 ~ 240 and below Over 22.4 ~ 70.3 and below
	MXJ-YA3100M	Over 240 ~ 461 and below Over 70.3 ~ 135.2 and below
	MXJ-YA3800M	Over 461 Over 135.2

Refrigerant pipe installation

Basic type - additional refrigerant

H/P H/R

Branch joint

▶ Basic amount of refrigerant within the outdoor unit

- Amount of additional refrigerant has to be calculated based on the sum of all liquid pipe length.

Classification	AM072F*	AM096F*	AM120F*	AM144F*	AM168H*	AM192H*
Basic type [kg (lb)] 5.5	(12.1) 7.4 (16.3) 7	4 (16.3) 8.7 (19.2)	11.0 (24.3) 11.0 (24.3)

Classification	AM072K*	AM096K*	AM216KXVGJ*
Basic type [kg (lb)] 8.4	(18.5) 8.4 (18.5)	12.5 (27.6)

▶ Amount of additional refrigerant depending on the pipe size (a)

- Amount of additional refrigerant has to be calculated based on the sum of all liquid pipe length.

Size of liquid pipe[mm (inch)]	∅6.35(∅1/4)	∅9.52(∅3/8)	∅12.70(∅1/2)	∅15.88(∅5/8)	∅19.05(∅3/4)	∅22.23(∅7/8)	∅25.40(∅1)
Additional amount[kg/m (lb/ft)]	0.02(0.013)	0.06(0.040)	0.125(0.084)	0.18(0.121)	0.27(0.181)	0.35(0.235)	0.53(0.356)

- For the indoor unit already connected to EEV kit, the additional refrigerant charging is 0.0067lb per feet regardless of the pipe size.

▶ Amount of additional refrigerant for each indoor unit (⑥)

(Unit : kg(lb))

Capacity (kBtu) Model	6.3	7.5	9	9.5	12	15	18	24	27	28	30	36	42	48	54	60	72	76.8	96
4way cassette S(AM** * FN4DC*)				0.45(0.99)			0.45(0.99)				0.45(0.99)	0.45(0.99)					0.69(1.52)	0.69(1.52)			0.69(1.52)
4way cassette S(AM** * JN4PC*),(AM** * JN4DC*)	0.45(0.99)																1.00(2.20)				1.00(2.20)
360 cassette(AM** * KN4DC*)				0.45(0.99)			0.45(0.99)				0.45(0.99)	0.45(0.99)					0.69(1.52)	0.69(1.52)			0.69(1.52)
Slim duct(AM** * FNLDC*)			0.35(0.77)			0.35(0.77)	0.35(0.77)				0.45(0.99)	0.45(0.99)					0.42(0.93)	0.42(0.93)			0.62(1.37)
MA duct(AM** * JNMDC*),(AM** * JNHDC*)			0.37(0.82)			0.37(0.82)	0.37(0.82)	0.37(0.82)	0.37(0.82)	0.54(1.19)	0.47(1.04)	0.47(1.04)					0.47(1.04)	0.68(1.50)			0.68(1.50)	0.91(2.01)
MA duct(AM** * JNMPC*)	0.37(0.82)										0.68(1.50)				0.68(1.50)				0.68(1.50)
MSP duct(AM** * FNMDC*)											0.28(0.62)	0.28(0.62)					0.54(1.19)	0.54(1.19)			0.68(1.50)
HSP duct(AM** * FNHDC*)																		0.68(1.50)			0.68(1.50)					1.18(2.60)	1.18(2.60)
Ceiling(AM** * FNCDC*),(AM** * JNCDC*)											0.39(0.86)	0.39(0.86)						0.56(1.23)			0.95(2.09)
V-AHU(AM** * JNZDC*)							0.33(0.73)				0.50(1.10)	0.50(1.10)					0.83(1.83)	0.88(1.94)			1.18(2.60)	1.27(2.80)	1.69(3.73)	1.69(3.73)
OAP Duct(AM** * JNESC*)																								1.18(2.60)		1.18(2.60)

Capacity (kBtu)Model	5 6	7.5 9	5 12	18 20	23.2	24 32
1way cassette(AM * * * FN1DC *)			0.25(0.55)	0.25(0.55)	0.25(0.55)
4way cassette S (600x600)(AM * * * FNNDC*) (AM * * * KNNDC*)	0.29(0.64)		0.29(0.64)	0.29(0.64)	0.29(0.64)	0.37(0.82)	0.37(0.82)
Floor Standing Unit(AM * * * JNFDC*), (AM * * * JNGDC *)		0.12(0.26)		0.22(0.49)	0.22(0.49)	0.32(0.71)			0.32(0.71)
Wall mounted(AM * * * FNTDC *)			0.24(0.53)	0.24(0.53)	0.24(0.53)	0.36(0.79)	0.36(0.79)	0.36(0.79)
Wall mounted(AM * * * HNQDC*)			0.34(0.75)	0.34(0.75)	0.34(0.75)	0.51(1.12)	0.51(1.12)	0.51(1.12)
MAX4 (with EEV)(AM * * * MNQDE * *)										0.68(1.50)

▶ Additional refrigerant charging of MCU is 0.5kg (1.1lb) for every MCU kit

▶ If AHU Kit is included among the indoor units, add 0.018kg(0.04lb) of refrigerant for every 1MBH of AHU capacity increase.

Refrigerant pipe installation

▶ Method to calculate total amount of additional refrigerant - Amount of additional refrigerant depending on the pipe length (a) - Amount of additional refrigerant for each indoor unit (⑥) = Σ(Amount of additional refrigerant for each connected indoor unit) ※ Refer to the table - Total amount of additional refrigerant = ⓐ+ ⓑ

* Sum of total amount of additional refrigerant and the basic amount of refrigerant should not exceed 100kg (220lb). If the refrigerant exceeds 100kg (220lb), separate the module so that weight of the refrigerant doesn't exceed 100kg (220lb).

Ex.) For AM144***, basic amount of refrigerant is 8.7kg (19.1lb), therefore total amount of additional refrigerant (a+b) should not exceed 91.3kg (200.9lb).

▶ Example of refrigerant calculation for HP models

Classification	Size of liquid pipe [mm (inch)]	Length [m (ft)]	Unit amount of refrigerant [kg/m (lb/ft)]	Amount of additional refrigerant [kg (lb)]	Total amount of additional refrigerant [kg (lb)]
		1	2	1×2	Σ(1×2)
Liquid pipe (a)	∅6.35 (∅1/4) 35	(114.8) 0.02 (0.013) 0.7	(1.49)		5.575 (12.19)∅9.52 (∅3/8) 50
	∅12.70 (∅1/2) 15	(49.2) 0.125 (0.084) 1.8	75 (4.13)

Classification	Model name of indoor unit	Number of units	Unit amount of refrigerant [kg/EA (lb/EA)]	Amount of additional refrigerant [kg (lb)]	Total amount of additional refrigerant [kg (lb)]
		1	2	1×2	(1×2)
Indoor unit (b)	4way cassette (AM018FN4DCH)	4	0.45 (0.99)	1.8 (3.96)	b 3.30 (7.26)
	Slim duct (AM024FNLDCH)	2	0.45 (0.99) 0.90 (1.98)
	Slim duct (AM012FNLDCH)	1	0.35 (0.77) 0.35 (0.77)
	1way cassette (AM012FN1DCH)	1	0.25 (0.55) 0.25 (0.55)

- Total amount of refrigerant (a+b) = 5.575 + 3.30 = 8.875 (kg)

= 12.19 + 7.26 = 19.45 (lb)

▶ Example of refrigerant calculation for HR models

Classification	Size of liquid pipe [mm (inch)]	Length [m (ft)]	Unit amount of refrigerant [kg/m (lb/ft)]	Amount of additional refrigerant [kg (lb)]	Total amount of additional refrigerant [kg (lb)]
		1	2	1×2	(1×2)
Liquid pipe (a)	∅ 6.35 (∅ 1/4)	15 (49.2)	0.02 (0.013) 0.3 (0.64)		a 11.965 (26.24)
	∅ 9.52 (∅ 3/8)	112 (367.5) 0.06 (0.040)	6.72 (14.70)
	∅ 12.70 (∅ 1/2) 25 (82.0)	0.125 (0.084) 3.1	25 (6.89)
	∅ 15.88 (∅ 5/8) 10 (32.8)	0.18	(0.121) 1.8 (3.97)
	∅ 6.35 (∅ 1/4) (EEV Kit ~ indoor unit)	2 (6.6)	0.01 (0.0067)	0.02 (0.04)
Classification	Model name of indoor unit	Number of units	Unit amount of refrigerant (kg/EA)	Amount of additional refrigerant (kg)	Total amount of additional refrigerant (kg)
		1	2	1×2	Σ(1×2)
Indoor unit (b)	4way cassette (AM024FN4DC*)	4 0.45 (0.99)	1.8 (3.96)		6 5.11 (11.25)
	4way cassette (AM036FN4DC*)	3 0.69 (1.52)	2.07 (4.56)
	Wall mounted (AM012FNTDC*)	1 0.24 (0.53)	0.24 (0.53)
	MCU 2 0.50 (1,10) 1 (2.20)

• Total amount of refrigerant (a+b) = 11.965 + 5.11 = 17.075 (kg) = 26.24 + 11.25 = 37.49 (lb)

Temper grade and minimum thickness of the refrigerant pipe

Outer diameter Minimum thickness				Temper grade
mm inch mm	inch
6.35	1/4	0.70	0.028	Annealed
9.52	3/8	0.70	0.028
12.70	1/2	0.80	0.031
15.88	5/8	1.00	0.039
19.05	3/4	0.90	0.035	Drawn
22.22	7/8	0.90	0.035
25.40	1	1.00	0.039
28.58	1 1/8	1.10	0.043
31.75	1 1/4	1.10	0.043
34.92	1 3/8	1.21	0.048
38.10	1 1/2	1.35	0.053
41.28	1 5/8	1.43	0.056
44.45	1 3/4	1.60	0.063
50.80	2	2.00	0.079
53.98	2 1/8	2.10	0.083

- For pipes larger than ∅ 3/4" (∅ 19.05mm), drawn type (C1220T-1/2H or C1220T-H) copper pipe must be used. If an annealed type (C1220T-O) copper pipe is used, the pipe may break due to its low pressure resistance and cause personal injury.

Refrigerant pipe installation

Keeping refrigerant pipe

To prevent foreign materials or water from entering the pipe, storing method and sealing method (especially during installation) is very important. Apply correct sealing method depending on the environment.

Exposure place Exposure time Sealing type
Outdoor	Longer than one month Pipe pinch
	Shorter than one month Taping
Indoor - Taping

Refrigerant pipe welding and safety information

CAUTION

Important information for refrigerant pipe work

• Make sure there is no moisture inside the pipe. - Make sure there are no foreign substances and impurities in the pipe. • Make sure there is no leakage. - Make sure to follow the instructions when welding or storing the pipe.

Nitrogen flushing welding

When welding the refrigerant pipes, flush them with nitrogen gas as shown in the picture. ▶ If you do not perform nitrogen flushing when welding the pipes, oxide may form inside the pipe. It can cause damage to important parts such as the compressor and valves, etc. Adjust the flow rate of the nitrogen flushing with a pressure regulator to maintain 0.05 m²/h (0.54 ft²/h) or less.

Direction of the pipe when welding

The pipe should be directed downward or sideways when welding. Avoid welding with the pipe direction heading upward.

CAUTION

- When testing for gas leakage after welding the pipes, use a designated solution for gas leakage detection. If you use a detection solution that contains sulfuric ingredients, it may cause corrosion to the pipes.

Cutting or flaring the pipes

1. Make sure that you have prepared the required tools.

▶ Pipe cutter, deburring tool, flaring tool, and pipe holder, etc.

1. If you want to shorten the pipe, cut it with a pipe cutter, ensuring that the cut edge remains at 90° with the side of the pipe.

▶ Refer to the illustrations below for correct and incorrect examples of cut edges.

1. To prevent a gas leak, remove all burrs at the cut edge of the pipe using a deburring tool.
2. Carry out flaring work using a flaring tool as shown below.

[Flaring tools]

Clutch type Wing nut type

		Pipe diameter [D, mm (inch)]	Depth of flaring part [A, mm (inch)]
			Using flaring tool for R-410A	Using conventional flaring tool
				Clutch type Wing nut type
		ø6.35(ø1/4) 0~0.5(0~0.02) 1.0~1.5(0.04~0.06)		1.5~2.0(0.06~0.08)
		ø9.52(ø3/8) 0~0.5(0~0.02) 1.0~1.5(0.04~0.06)		1.5~2.0(0.06~0.08)
		ø12.70(ø1/2) 0~0.5(0~0.02) 1.0~1.5(0.04~0.06)		1.5~2.0(0.06~0.08)
		ø15.88(ø5/8) 0~0.5(0~0.02) 1.0~1.5(0.04~0.06)		1.5~2.0(0.06~0.08)

1. Check that you flared the pipe correctly.

Refer to the illustrations below for correct and incorrect examples of flared pipe.

Uneven Thickness, Cracked, Damaged Surface, Inclined, Correct

CAUTION

• If foreign matters or burrs are not removed after cutting the pipe, refrigerant gas may leak.
• If foreign matters enter inside the pipe, important interior parts of the unit may get damaged or product efficiency will be reduced. So, the direction of the pipe should be downward during pipe cutting or flaring.

Refrigerant pipe installation

Connecting the flared pipes

Check if the flaring is properly done according to the standard size.

Align the center of the piping and tighten the flare nut with your hands. Then, tighten the flare nut with a torque wrench in the direction of the arrow indicated in the illustration below.

Make sure to use ester oil to coat the flare connection section.

Flare connection section, Flare nut

Outer diameter (D) Torque Flare dimension (L)						Flare shape [mm(inch)]
mm inch	N·m lbf·ft mm inch
6.35 1/4	14 ~ 18 10.3 ~		13.3 8.7 ~ 9.1	0.34 ~ 0.36
9.52 3/8	34 ~ 42 25.1 ~		31.0 12.8 ~ 13.2	0.50 ~ 0.52
12.7 1/2	49 ~ 61 36.1 ~		45.0 16.2 ~ 16.6	0.64 ~ 0.65
15.88 5/8	68 ~ 82 50.2 ~		60.5 19.3 ~ 19.7	0.76 ~ 0.78

• Blowing nitrogen gas should be done when welding the pipe. Make sure to use the provided flare nut.
• Make sure that there are no cracks or twisted parts when you need to bend the pipe.
• Do not fasten the flare nut with excessive strength.
• R-410A is a high pressure refrigerant and there is a risk of refrigerant leakage if the flare connection is not coated with ester oil. Therefore, apply ester oil to coat the flare connection area.

Pipe installation for an outdoor unit

1. Direction of the pipe

Refrigerant pipe can be withdrawn from the front, left and right side. Take necessary method to install the pipes according to the condition of the installation site.

Right side connection Left side connection

Caution for using knock-out hole

Knock-out hole

• Make sure to prevent any damages on the exterior of the outdoor unit.
• Remove all burrs around the knock-out hole and apply varnish on the cross section and edges of the knock-out hole to prevent rust.
• Use a cable protection tube and bushing to prevent a cable from being damaged when passing through a knock-out hole.

Refrigerant pipe installation

1. Connecting refrigerant pipe for outdoor unit

Classification Front side connection Right/left (and bottom) side connection
Working process	First, remove the piping cover from the outdoor unit.Separate the knock-out hole that you are going to use. If you separate the knock-out hole that is going to be unused, small animals such as squirrels and rats may get into the unit through the hole.Fix the bottom side of the piping cover first and then fix the top part of it.	Separate the knock-out hole at the bottom side of the unit and install the pipe.After installing and insulating the pipe, close up the remaining holes. If not, small animals such as rats and squirrels may get inside the unit.
H/P	Liquid side pipe	Liquid side pipe
H/R	High pressure gas pipe	High pressure gas pipe

Caution for welding the pipe to an outdoor unit

• When welding the pipe, the unit may get damaged by the heat and flame from welding. Use a flame proofing cloth to protect the unit from a welding fire or flame. Sensor for detecting outside temperature is located on the left side of the welding part so be extra careful not to damage the sensor when welding.
• The O-ring and Teflon packing inside service valve may get damaged by the heat from welding. Wrap the bottom side of the service valve with a wet cloth and weld it as shown in the illustration. Also, water dripping from the wet cloth may interrupt the welding. Make sure the water does not drip from the wet cloth.
• Make sure that connected pipes do not interrupt each other or make contact with the product. (Vibration may cause damage to the pipes.)
• When removing the sealed pipe on the bottom side of the service valve, cut it with a pipe cutter first and then start the welding. When the sealed pipe is welded without cutting, you may get injured by the refrigerant within the pipe.

Refrigerant pipe installation

3. Pipe installation between the outdoor units

▶ You will need branch joints, which are optional accessories, for connecting between outdoor units in order to combine outdoor units in a module. * For optimal distribution of the refrigerant, you must use a Y-joint as the branch joint for connecting outdoor units. (Do not use a T-joint) ▶ When you install the outdoor units in a module, there is no restriction on the installation order among outdoor units. ▶ The height of the connection pipe should be the same as or lower than the ones connected to the outdoor units. ▶ Check the changes in comparison with the DVM II and III.

Caution Correct installation Incorrect installation
Refrigerant pipes should be connected at the same or lower level than the ones connected to the outdoor unit.
Refrigerant pipes must be connected by the side of the product.	(12inch) or more
Branch joint between outdoor units must be installed horizontally.
When the piping length between outdoor unit and the branch joint exceeds 2m (6.56ft), install a vertical trap as show in the figure.

Examples of refrigerant pipe installation

H/P

1. Using Y-joint

2. Using distribution header

H/R

1. Using Y-joint

Note 1) Direct-connected indoor unit without MCU (for HR only)

- This indoor unit can only be used for cooling operation. (Heating operation is not possible.)

- Connect the indoor unit to the liquid and low-pressure gas pipes.

- Change the installation option for the direct-connected indoor unit without MCU. (Refer to the indoor unit installation manual)

Refrigerant pipe installation

Allowable length of the refrigerant pipe and the installation examples

H/P

Classification Single Installation Module installation
Installing only with Y-joint	Outdoor unit
Installing with Y-joint and distribution header		Outdoor unit
Installing only with distribution header	Outdoor unit

Classification Example Remarks
Maximum allowable length of pipe	Outdoor unit ~ Indoor unit	Actual length (Equivalent length)	200 m (656') and below [220 m (722') and below]	Installing only with Y-joint	a+b+c+d+e+f+g+p ≤ 200 m(220 m)/656'(722')	Equivalent length Y-joint: 0.5 m (1.64'), Distribution header: 1 m (3.28')
				Installing with Y-joint and distribution header	a+b+h ≤ 200 m(220 m)/656'(722'), a+i+k ≤ 200 m(220 m)/656'(722')
				Installing only with distribution header	a+i ≤ 200 m(220 m)/656'(722')
		Total length of pipe (m)	1000 m (3281') or less	Installing only with Y-joint	a+b+c+d+e+f+g+h+i+j+k+l+m+n+p ≤ 1000 m
				Installing with Y-joint and distribution header	a+b+c+d+e+f+g+h+i+j+k ≤ 1000 m (3281')
				Installing only with distribution header	a+b+c+d+e+f+g+h+i ≤ 1000 m (3281')
	Outdoor unit ~ Outdoor unit (Module installation)	Pipe length	10 m (33') or less	x ≤ 10 m (33'), y ≤ 10 m (33'), z ≤ 10 m (33')
		Equivalent length	13 m (43') or less	x ≤ 13 m (43'), y ≤ 13 m (43'), z ≤ 13 m (43')
Maximum allowable height difference of pipe	Outdoor unit ~ Indoor unit	110/110 m(361'/361') Note 2)		H1 ≤ 110/110 m(361'/361')
	Indoor unit ~ Indoor unit	50 m (164') H2 ≤ 50		m (164')
		But, when AM***HNQDC* is installed, H2 is 15 m(49') or less.
Maximum allowable length after branch joint	First branch joint ~ Farthest Indoor unit	Pipe length	45m (148') or less	Installing only with Y-joint	b+c+d+e+f+g+p ≤ 45m (148')	-
				Installing with Y-joint and distribution header	i+k ≤ 45m (148')
				Installing only with distribution header	i ≤ 45m (148')
			45m~90m (148'~295') Note 1)	Required conditions must be satisfied -

EEV kit Model name Remarks
EEV Kit ~ Indoor unit	Actual pipe length	2 m(6.6') or less	MEV-E24SA	1 indoor	Apply to products without EEV(Wall mounted & ceiling)
			MEV-E32SA
		20 m(66') or less	MXD-E24K132A	2 indoorMXD-E24K200A
			MXD-E32K200A
			MXD-E24K232A	3 indoor
			MXD-E24K300A
			MXD-E32K224A
			MXD-E32K300A

* Please refer to the EEV Kit manual.

Note 1) Required condition

Classification Condition Example
First branch joint ~ Farthest Indoor unit	45 m (148') ≤ b+c+d+e+f+g+p ≤ 90 m (295'): branch pipes (b, c, d, e, f, g) size must be increased by 1 grade
Total length of extended pipe	If the size of pipe (main pipe), between the first branch joint and the outdoor unit, is not increased by 1 grade, a+(b+c+d+e+f+g)x2+h+i+j+k+l+m+n+p ≤ 1000 m (3281')
	If the size of pipe (main pipe), between the first branch joint and the outdoor unit, is increased by 1 grade, a+(b+c+d+e+f+g)x2+h+i+j+k+l+m+n+p ≤ 1000 m (3281')
Each Y-joint ~ Each indoor unit	h, i, j, ... p ≤ 45 m (148')
Difference between the distance of the outdoor unit to the farthest indoor unit and nearest indoor unit ≤ 45 m (148'), (a+b+c+d+e+f+g+p)-(a+h) ≤ 45 m (148')

Note 2) When indoor unit is located at higher level than outdoor unit, allowable height difference is 110 m (361'), (If the height difference is over 40 m (131'), contact your local dealer for more information.) but when the indoor unit is located at lower level than outdoor unit, allowable height difference is 110 m (361') (If the height difference is over 50 m (164'), need to decide whether to install PDM kit or not.) Model name of the PDM kit : MXD-A38K2A, MXD-A12K2A, MXD-A58K2A

Refrigerant pipe installation

H/R

Classification Installing only with Y-joint
Installing only with MCU
Installing with MCU and Y-joint

Classification Example Remarks
Maximum allowable pipe length	Outdoor unit ~ Indoor unit	Actual pipe length (Equivalent length)	200 m or less (220 m or less) /656'(722')	Installing only with MCU	a+g+j ≤ 200 m (220 m)/656'(722')	Equivalent length• Y-joint: 0.5 m (1.64')• Distribution header: 1 m(3.28')• MCU: 1 m (3.28')
				Installing with MCU and Y-joint	a+b+h+k ≤ 200 m (220 m)/656'(722')
		Total length of pipe	1000 m(3281') or less	Installing only with MCU	a+b+c+d+e+f+g+h+i+j ≤ 1000 m(3281')
				Installing with MCU and Y-joint	a+b+c+...+q ≤ 1000 m(3281')
	Outdoor unit ~ Indoor unit	Pipe length	10 m(33') or less	x ≤ 10 m (33'), y ≤ 10 m (33'), z ≤ 10 m (33')
		Equivalent length	13 m(43') or less	x ≤ 13 m (43'), y ≤ 13 m (43'), z ≤ 13 m (43')
	MCU ~ Indoor unit	Pipe length	45 m(148') or less	Installing only with MCU	b+c ≤ 45 m(148'), b+d ≤ 45 m(148'), b+e ≤ 45 m(148'), f≤ 45 m(148'), g+h ≤ 45 m(148'), g+i ≤ 45 m(148'), g+j ≤ 45 m(148')
				Installing with MCU and Y-joint	c+d ≤ 45 m(148'), c+e ≤ 45 m(148'), c+f ≤ 45 m(148'), g ≤ 45 m(148'), h+i ≤ 45 m(148'), h+j ≤ 45 m(148'), h+k ≤ 45 m,(148') m ≤ 45 m(148'), n ≤ 45 m(148'), o ≤ 45 m(148'), p ≤ 45 m(148')
Maximum allowable height difference	Outdoor unit ~ Indoor unit	Pipe length	110 m/110 m (361'/361')Note 1)	H1 ≤ 110 m/110 m (361'/361')
	Indoor unit ~ Indoor unit		40 m(131') or less	H2 ≤ 40 m(131')
			But, when AM * * * HNQDC * is installed, H2 is 15 m(49') or less.
	Indoor unit ~ Indoor unit (in one MCU)		15 m(49') or less	H3 ≤ 15 m(49')
	MCU ~ MCU		30 m(98') or less	H4 ≤ 30 m(98')
Maximum allowable length after branch joint	First branch joint ~ Farthest Indoor unit	Pipe length	45 m(148') or less	Installing only with MCU	g+j ≤ 45 m(148')
			45 ~ 90 m (148'~295') Note 2)	Installing with MCU and Y-joint	b+h+k ≤ 45 m(148') l+p ≤ 45 m(148')
					Required conditions must be satisfied

Distribution kit Model Remarks
From distribution kit to indoor unit	Actual pipe length	2 m(6.6') or less	MEV-24SA (For 1 indoor unit)	Applied to products without EEV (wall-mounted)

Note 1) When indoor unit is located at higher level than outdoor unit, allowable height difference is 110 m (361'), (If the height difference is over 40 m (131'), contact your local dealer for more information.) but when the indoor unit is located at lower level than outdoor unit, allowable height difference is 110 m (361') (If the height difference is over 50 m (164'), need to decide whether to install PDM kit or not.) Model name of the PDM kit : MXD-A38K2A, MXD-A12K2A, MXD-A58K2A

Note 2) Required condition

Classification Condition Example
First branch joint ~ Farthest Indoor unit	45 m ≤ b+h+k, l+m+q, l+r ≤ 90 m(295') : Size of the branch liquid and low pressure gas pipes (b, l, m) must be increased by 1 grade.
Total length of extended pipe	If the size of pipe (main pipe), between the first branch joint and the outdoor unit, is not increased by 1 grade, a+(b+l+m) x 2+c+d+e+f+g+h+i+j+k+n+o+p+q+r ≤ 1000 m(3281')
	If the size of pipe (main pipe), between the first branch joint and the outdoor unit, is increased by 1 grade, (a+b+l+m) x 2+c+d+e+f+g+h+i+j+k+n+o+p+q+r ≤ 1000 m(3281')
MCU ~ Each indoor unit	c+d, c+e, c+f, g, h+i, h+j, h+k, n, o, p, q, r ≤ 45 m(148')
Difference between the distance of the outdoor unit to the farthest indoor unit and nearest indoor unit ≤ 45 (a+b+h+k) - (a+b+c+d) ≤ 45 m(148')

Note 3) For indoor units to which no MCU is connected, be sure to set their options to "Cooling only indoor unit," and then connect them to a low pressure gas pipe and a liquid pipe. Be sure to combine the cooling only indoor units so that their total capacity becomes 50% or less of the total capacity of all indoor units. Note 4) In case of connecting more than one indoor unit in one MCU Port, the below indoor units cannot be combined. ERV plus (AM **** NK * C **), OAP duct (AM **** NE *C *), Hydro Unit HE (AM **** NBDC *), Hydro Unit HT (AM **** NBFC *), AHU kit (MXD-K **** AN, MCM-D**** N) Note 5) In case of connecting two MCU ports with Y-joint, the indoor units cannot be combined to more than one. * Total refrigerant amount of the system must be less than 100 kg (220 lb). If total refrigerant amount of system is over than 100 kg (220 lb), the system has to be divided into smaller system, each less than 100 kg (220 lb).

Refrigerant pipe installation

Installing the branch joints

Branch joints must be installed 'horizontally' or 'vertically'.

Horizontal installation

Vertical installation

NOTE

• For A~J type branch joints: Connect the branch joint to the connection pipe with the provided reducer.
• For K~Z type branch joints: Cut the connection part of the branch joint or the provided socket, according to the diameter of the connection pipe, before connecting them.

10mm~15mm (0.39~0.59 inch)

CAUTION

• Install the branch joint within ±15° of the horizon or vertical line. - Make sure that the pipe is not bent at where it is connected to the branch joint. - Keep a minimum straight line distance of 500mm (20 inch) or more before connecting branch joint.

* Install within ±15° of the horizon or vertical line.

Installing the distribution header

1. Select the reducer that fits the diameter of the pipe.

* Pipe : Separately purchased item

1. If the number of connected indoor unit is fewer than ports on the distribution header, block the unused ports with caps.

NOTE

- For A~J type distribution header:

Connect the distribution header to the connection pipe with the provided reducer.

- For K\~Z type distribution headers :

Cut the provided socket, according to the diameter of the connection pipe, before connecting it.

CAUTION

• Connect the indoor units in order, while respecting the direction of the arrow shown in the illustration.
• When indoor units are connected to same distribution head, indoor unit must be connected in order of their capacity, from largest to smallest.

Refrigerant pipe installation

3. Install the distribution header horizontally.

▶ Install the distribution header horizontally so that its ports does not face down.

Installing the branch joint between outdoor units

Installation of outdoor joints

* High pressure gas pipe only applies to the H/R product.

Refrigerant pipe installation

Installing the MCU

MCU specification

Model MCU-S6	NEK2N MCU-S4NEK3N MCU	S2NEK2N MCU-S1NEK1N
Exterior of MCU
Number of connectable indoor units at one port	Up to 8 units Up to 8 units Up to 8 units Up to 8 units
The maximum capacity of the connectable indoor units at one port	16 kW (54MBH) 16 kW	(54MBH) 16 kW (54MBH)	16 kW (54MBH)
The maximum capacity of the connectable indoor units	61.6 kW (210MBH) 61.6 kW (210MBH) 32 kW (109MBH) 32 kW (109MBH)
Internal EEV Not included

CAUTION

• Indoor units without internal EEV (AM HNQDC ) cannot be connected directly to the MCU.
• Please connect these indoor units using an EEV kit (MEV-E **SA, MXD-E** K****A).

Model MCU-S6	NEK2N MCU-S4NEK3N MCU	S2NEK2N MCU-S1NEK1N
Example installing (Each port connection)
Example installing (MCU series connection)	MCU series connection
Installing indoor units	Under 16 kW (54MBH) kW indoor unit: Don't use Y-connector16 kW (54MBH) ~ 28 kW (96MBH) indoor unit: Use Y-connector at the Gas & Liquid lineIf you want to continuous cooling operation under -5°C (23°F), set outdoor 'Expand operational temperature range for cooling operation (HR only)', and use Y-connector on 5 kW (17MBH) ~ 16 kW (54MBH) indoor unitIn case of using Y-connector, it is only connectable for port combination at below Connectable port combination for Y-connector: A + B port, C + D port, E + F portNon-connectable port combination for Y-connector:B + C port, D + E port, non-continuous portSet Dip Switch option for using Y-connectorS/W Option S/W Option S/W Option S/W OptionDefault Combination of A+B port Combination of C+D port Combination of E+F portIn case of MCU connection in series, the maximum capacity of indoor units in MCU series connection is 61.6 kW (210MBH)			This unit is only connectable for one port under 16 kW (54MBH)This unit is impossible to connect MCU to MCU in series.

Refrigerant pipe installation

How to connect the pipes

* When installing the MCU, use the installation pattern sheet provided with the product.

* When welding the gas pipes, protect the product with a flame-proof sheet. * When connecting the MCU to outdoor units, the default direction is set in the MCU.

If installing in the opposite direction, weld the enclosed copper caps in each high-pressure, low-pressure, and liquid pipe.

Installing the MCU

MCU specification

Model MCU-S6NEE1N MCU-S4NEE1N MCU-S4NEE2N MCU-S2NEK1N
Exterior of MCU
Number of connectable indoor units	Up to 6 units Up to 4 units		Up to 2 units* Refer the detail information of installation	Up to 2 units
Maximum capacity of connectable indoor units	56 kW (192MBH) 56 kW (192MBH) 56 kW (192MBH)			28 kW (96MBH)

Installing the indoor units

Model MCU-S6NEE1N MCU-S4NEE1N MCU-S4NEE2N MCU-S2NEK1N
Example installing
Installation Condition	Single capacity range 10 kW(30 MBH) or under: Connect the liquid, gas pipe of indoor unit to a single port in MCU11.2~14 kW(36~48 MBH): Use Y-Joint		The indoor unit's capacity of 20 kw(60 MBH) or over, must use the appropriate MCUApply when connecting the indoor unit's capacity of over 11.2 kW (36 MBH): Use Y-Joint	14 kW(48 MHB) or under: Connect the liquid, gas pipe of indoor unit to a single port in MCU14~28 kW(48~96 MBH): Use Y-Joint(DB97-19694A)
Maximum IDU Capacity	14 kW(48 MBH) 28 kW(96 MBH) 28 kW(96 MBH)
Minimum IDU Capacity	- 11.2 kW(36 MBH) -
Maximum Single Port Capacity	10 kW(30 MBH) - 14 kW(48 MBH)
Installation condition in case of continuous cooling	5~14 kW(18~48 MBH): Use Y-jointUnder 5 kW(18 MBH): Connect the liquid, gas pipe of indoor unit to a single port in MCU		Use Y-Joint	5 kW(18 MHB) or over: Use Y-Joint(DB97-19693A)Under 5 kW(18 MBH): Connect the liquid, gas pipe of indoor unit to a single port in MCU
	Option switch and key function needs to set. For detail information, refer to the outdoor unit's manual
Remarks Y-Joint consists of accessories				Y-Joint is supplied with service materials (DB97-19693A, DB97-19694A)

Refrigerant pipe installation

How to connect the pipes

* When installing the MCU, use the installation pattern sheet provided with the product. * When welding the high/low pressure gas pipe, protect the product with a flame-proof sheet.

Electrical wiring work

Specification of the circuit breaker and power cable

Electric Characteristics

1. Heat Pump/Heat Recovery (208~230V) (AM****F*, AM****H*, AM****J* Series)

		Units		Module1 Module2
				RLA FLA Power Supply RLA FLA Power Supply
Nom.Ton	Model	Hz	Volts	Comp1	Comp2	FAN1	FAN2	MCA	MOP	Comp1	Comp2	FAN1	FAN2	MCA	MOP
6TON	AM072*XVAF*	60	208/230	14.3		4.0		28.0	35.0
8TON	AM096*XVAF*	60	208/230	13.9	13.9	3.0	3.0	37.8	50.0
10TON	AM120*XVAF*	60	208/230	14.8	14.8	3.0	3.0	43.0	50.0
12TON	AM144*XVAF*	60	208/230	20.7	20.7	3.0	3.0	52.6	70.0
14TON	AM168*XVAF*	60	208/230	24.0	24.0	3.0	3.0	66.0	80.0
16TON	AM192*XVAF*	60	208/230	28.0	28.0	3.0	3.0	73.0	90.0
18TON	AM216*XVAF*	60	208/230	14.3		4.0		28.0	35.0	20.7	20.7	3.0	3.0	52.6	70.0
20TON	AM240*XVAF*	60	208/230	14.3		4.0		28.0	35.0	24.0	24.0	3.0	3.0	66.0	80.0
22TON	AM264*XVAF*	60	208/230	14.3		4.0		28.0	35.0	28.0	28.0	3.0	3.0	73.0	90.0
24TON	AM288*XVAF*	60	208/230	20.7	20.7	3.0	3.0	52.6	70.0	20.7	20.7	3.0	3.0	52.6	70.0
26TON	AM312*XVAF*	60	208/230	20.7	20.7	3.0	3.0	52.6	70.0	24.0	24.0	3.0	3.0	66.0	80.0
28TON	AM336*XVAF*	60	208/230	24.0	24.0	3.0	3.0	66.0	80.0	24.0	24.0	3.0	3.0	66.0	80.0
30TON	AM360*XVAF*	60	208/230	24.0	24.0	3.0	3.0	66.0	80.0	28.0	28.0	3.0	3.0	73.0	90.0
32TON	AM384*XVAF*	60	208/230	28.0	28.0	3.0	3.0	73.0	90.0	28.0	28.0	3.0	3.0	73.0	90.0
34TON	AM408*XVAF*	60	208/230	14.3		4.0		28.0	35.0	20.7	20.7	3.0	3.0	52.6	70.0
36TON	AM432*XVAF*	60	208/230	20.7	20.7	3.0	3.0	52.6	70.0	20.7	20.7	3.0	3.0	52.6	70.0
38TON	AM456*XVAF*	60	208/230	14.8	14.8	3.0	3.0	43.0	50.0	24.0	24.0	3.0	3.0	66.0	80.0
40TON	AM480*XVAF*	60	208/230	20.7	20.7	3.0	3.0	52.6	70.0	24.0	24.0	3.0	3.0	66.0	80.0
42TON	AM504*XVAF*	60	208/230	24.0	24.0	3.0	3.0	66.0	80.0	24.0	24.0	3.0	3.0	66.0	80.0
44TON	AM528*XVAF*	60	208/230	24.0	24.0	3.0	3.0	66.0	80.0	24.0	24.0	3.0	3.0	66.0	80.0

		Units		Module3
				RLA		FLA		Power Supply
Nom.Ton	Model Hz Volts Comp	mp1	mp2 FAN1	FAN2	MCA MOP
6TON	AM072*XVAF*	60	208/230
8TON	AM096*XVAF*	60	208/230
10TON	AM120*XVAF*	60	208/230
12TON	AM144*XVAF*	60	208/230
14TON	AM168*XVAF*	60	208/230
16TON	AM192*XVAF*	60	208/230
18TON	AM216*XVAF*	60	208/230
20TON	AM240*XVAF*	60	208/230
22TON	AM264*XVAF*	60	208/230
24TON	AM288*XVAF*	60	208/230
26TON	AM312*XVAF*	60	208/230
28TON	AM336*XVAF*	60	208/230
30TON	AM360*XVAF*	60	208/230
32TON	AM384*XVAF*	60	208/230
34TON	AM408*XVAF*	60	208/230	28.0	28.0	3.0	3.0	73.0	90.0
36TON	AM432*XVAF*	60	208/230	20.7	20.7	3.0	3.0	52.6	70.0
38TON	AM456*XVAF*	60	208/230	24.0	24.0	3.0	3.0	66.0	80.0
40TON	AM480*XVAF*	60	208/230	24.0	24.0	3.0	3.0	66.0	80.0
42TON	AM504*XVAF*	60	208/230	24.0	24.0	3.0	3.0	66.0	80.0
44TON	AM528*XVAF*	60	208/230	28.0	28.0	3.0	3.0	73.0	90.0

Note: 1. RLA is based on AHRI 1230 Cooling Standard Condition (Indoor Temp : 26.7°C/80°F(DB) / 19.46°C/67°F(WB), Outdoor Temp : 35°C/95°F(DB)) 2. Voltage Tolerance is ± 10% 3. Maximum allowable voltage between phases is 2% 4. Refer to module combination table for independent units information Symbols: 1. RLA : Rated Load Ampere 2. FLA : Full Load Ampere 3. MCA : Minimum Circuit Ampere (A) 4. MOP : Maximum Overcurrent Protective Device(A)

Electrical wiring work

1. Heat Pump/Heat Recovery (460V) (AM***F*, AM***H*, AM***J* Series)

		Units		Module1 Module2
				RLA FLA Power Supply RLA FLA Power Supply
Nom.Ton	Model	Hz	Volts	Comp1	Comp2	FAN1	FAN2	MCA	MOP	Comp1	Comp2	FAN1	FAN2	MCA	MOP
6TON	AM072 *XVAJ*	60	460	9.5		2.0		16.4	20.0
8TON	AM096 *XVAJ*	60	460	11.5		1.5	1.5	19.0	25.0
10TON	AM120 *XVAJ*	60	460	14.0		1.5	1.5	21.7	30.0
12TON	AM144 *XVAJ*	60	460	11.4	11.4	1.5	1.5	28.7	40.0
14TON	AM168 *XVAJ*	60	460	12.0	12.0	1.5	1.5	33.0	40.0
16TON	AM192 *XVAJ*	60	460	14.5	14.5	1.5	1.5	37.0	50.0
18TON	AM216 *XVAJ*	60	460	9.5		2.0		16.4	20.0	11.4	11.4	1.5	1.5	28.7	40.0
20TON	AM240 *XVAJ*	60	460	9.5		2.0		16.4	20.0	12.0	12.0	1.5	1.5	33.0	40.0
22TON	AM264 *XVAJ*	60	460	9.5		2.0		16.4	20.0	14.5	14.5	1.5	1.5	37.0	50.0
24TON	AM288 *XVAJ*	60	460	11.4	11.4	1.5	1.5	28.7	40.0	11.4	11.4	1.5	1.5	28.7	40.0
26TON	AM312 *XVAJ*	60	460	11.4	11.4	1.5	1.5	28.7	40.0	12.0	12.0	1.5	1.5	33.0	40.0
28TON	AM336 *XVAJ*	60	460	12.0	12.0	1.5	1.5	33.0	40.0	12.0	12.0	1.5	1.5	33.0	40.0
30TON	AM360 *XVAJ*	60	460	12.0	12.0	1.5	1.5	33.0	40.0	14.5	14.5	1.5	1.5	37.0	50.0
32TON	AM384 *XVAJ*	60	460	14.5	14.5	1.5	1.5	37.0	50.0	14.5	14.5	1.5	1.5	37.0	50.0
34TON	AM408 *XVAJ*	60	460	9.5		2.0		16.4	20.0	11.4	11.4	1.5	1.5	28.7	40.0
36TON	AM432 *XVAJ*	60	460	11.4	11.4	1.5	1.5	28.7	40.0	11.4	11.4	1.5	1.5	28.7	40.0
38TON	AM456 *XVAJ*	60	460	14.0		1.5	1.5	21.7	30.0	12.0	12.0	1.5	1.5	33.0	40.0
40TON	AM480 *XVAJ*	60	460	11.4	11.4	1.5	1.5	28.7	40.0	12.0	12.0	1.5	1.5	33.0	40.0
42TON	AM504 *XVAJ*	60	460	12.0	12.0	1.5	1.5	33.0	40.0	12.0	12.0	1.5	1.5	33.0	40.0
44TON	AM528 *XVAJ*	60	460	12.0	12.0	1.5	1.5	33.0	40.0	12.0	12.0	1.5	1.5	33.0	40.0

		Units		Module3
				RLA FLA Power Supply
Nom.Ton	Model Hz Volts Comp1	Comp2	FAN1 FAN2 MCA	MOP
6TON	AM072*XVAJ*	60	460
8TON	AM096*XVAJ*	60	460
10TON	AM120*XVAJ*	60	460
12TON	AM144*XVAJ*	60	460
14TON	AM168*XVAJ*	60	460
16TON	AM192*XVAJ*	60	460
18TON	AM216*XVAJ*	60	460
20TON	AM240*XVAJ*	60	460
22TON	AM264*XVAJ*	60	460
24TON	AM288*XVAJ*	60	460
26TON	AM312*XVAJ*	60	460
28TON	AM336*XVAJ*	60	460
30TON	AM360*XVAJ*	60	460
32TON	AM384*XVAJ*	60	460
34TON	AM408*XVAJ*	60	460	14.5	14.5	1.5	1.5	37.0	50.0
36TON	AM432*XVAJ*	60	460	11.4	11.4	1.5	1.5	28.7	40.0
38TON	AM456*XVAJ*	60	460	12.0	12.0	1.5	1.5	33.0	40.0
40TON	AM480*XVAJ*	60	460	12.0	12.0	1.5	1.5	33.0	40.0
42TON	AM504*XVAJ*	60	460	12.0	12.0	1.5	1.5	33.0	40.0
44TON	AM528*XVAJ*	60	460	14.5	14.5	1.5	1.5	37.0	50.0

Note: 1. RLA is based on AHRI 1230 Cooling Standard Condition (Indoor Temp : 26.7°C/80°F(DB) / 19.46°C/67°F(WB), Outdoor Temp : 35°C/95°F(DB)) 2. Voltage Tolerance is ± 10% 3. Maximum allowable voltage between phases is 2% 4. Refer to module combination table for independent units information

Symbols: 1. RLA : Rated Load Ampere

1. FLA : Full Load Ampere
2. MCA : Minimum Circuit Ampere (A)
3. MOP : Maximum Overcurrent Protective Device(A)
4. Heat Pump/Heat Recovery (220V) (AM****K* Series)

		Units		Module1 Module2
				RLA FLA Power Supply RLA FLA Power Supply
Nom.Ton	Model Hz Volts Comp1	Comp2	FAN1 FAN2	MCA MOP	Comp1	Comp2	FAN1	FAN2	MCA MOP
6TON	AM072*XVTF*	60	208/230	19.5	19.5	3.0	3.0	50.0	60.0
8TON	AM096*XVTF*	60	208/230	28.4	28.4	3.0	3.0	70.0	80.0
12TON	AM144*XVTF*	60	208/230	19.5	19.5	3.0	3.0	50.0	60.0	19.5	19.5	3.0	3.0	50.0	60.0
14TON	AM168*XVTF*	60	208/230	19.5	19.5	3.0	3.0	50.0	60.0	28.4	28.4	3.0	3.0	70.0	80.0
16TON	AM192*XVTF*	60	208/230	28.4	28.4	3.0	3.0	70.0	80.0	28.4	28.4	3.0	3.0	70.0	80.0
18TON	AM216*XVTF*	60	208/230	19.5	19.5	3.0	3.0	50.0	60.0	19.5	19.5	3.0	3.0	50.0	60.0
20TON	AM240*XVTF*	60	208/230	19.5	19.5	3.0	3.0	50.0	60.0	19.5	19.5	3.0	3.0	50.0	60.0
22TON	AM264*XVTF*	60	208/230	19.5	19.5	3.0	3.0	50.0	60.0	28.4	28.4	3.0	3.0	70.0	80.0
24TON	AM288*XVTF*	60	208/230	28.4	28.4	3.0	3.0	70.0	80.0	28.4	28.4	3.0	3.0	70.0	80.0

		Units		Module3
				RLA FLA Power Supply
Nom.Ton	Model	Hz	Volts	Comp1	Comp2	FAN1	FAN2	MCA	MOP
6TON	AM072*XVTF*	60	208/230
8TON	AM096*XVTF*	60	208/230
12TON	AM144*XVTF*	60	208/230
14TON	AM168*XVTF*	60	208/230
16TON	AM192*XVTF*	60	208/230
18TON	AM216*XVTF*	60	208/230	19.5	19.5	3.0	3.0	50.0	60.0
20TON	AM240*XVTF*	60	208/230	28.4	28.4	3.0	3.0	70.0	80.0
22TON	AM264*XVTF*	60	208/230	28.4	28.4	3.0	3.0	70.0	80.0
24TON	AM288*XVTF*	60	208/230	28.4	28.4	3.0	3.0	70.0	80.0

Note: 1. RLA is based on AHRI 1230 Cooling Standard Condition (Indoor Temp: 26.7°C/80°F(DB) / 19.46°C/67°F(WB), Outdoor Temp: 35°C/95°F(DB)). 2. Voltage Tolerance is ±10%. 3. Maximum allowable voltage between phases is 2%. 4. Refer to module combination table for independent units information. Symbols: 1. RLA: Rated Load Ampere. 2. FLA: Full Load Ampere. 3. MCA: Minimum Circuit Ampere (A). 4. MOP: Maximum Overcurrent Protective Device (A).

Electrical wiring work

1. Heat Pump/Heat Recovery (460V) (AM****K* Series)

		Units		Module1 Module2
				RLA FLA Power Supply RLA FLA Power Supply
Nom.Ton	Model Hz Volts Comp1	Comp2	FAN1 FAN2	MCA MOP	Comp1	Comp2	FAN1	FAN2	MCA MOP
6TON	AM072*XVTJ*	60	460	11.1	11.1	1.5	1.5	28.0	35.0
8TON	AM096*XVTJ*	60	460	15.5	15.5	1.5	1.5	38.0	45.0
12TON	AM144*XVTJ*	60	460	11.1	11.1	1.5	1.5	28.0	35.0	11.1	11.1	1.5	1.5	28.0	35.0
14TON	AM168*XVTJ*	60	460	11.1	11.1	1.5	1.5	28.0	35.0	15.5	15.5	1.5	1.5	38.0	45.0
16TON	AM192*XVTJ*	60	460	15.5	15.5	1.5	1.5	38.0	45.0	15.5	15.5	1.5	1.5	38.0	45.0
18TON	AM216*XVTJ*	60	460	11.1	11.1	1.5	1.5	28.0	35.0	11.1	11.1	1.5	1.5	28.0	35.0
20TON	AM240*XVTJ*	60	460	11.1	11.1	1.5	1.5	28.0	35.0	11.1	11.1	1.5	1.5	28.0	35.0
22TON	AM264*XVTJ*	60	460	11.1	11.1	1.5	1.5	28.0	35.0	15.5	15.5	1.5	1.5	38.0	45.0
24TON	AM288*XVTJ*	60	460	15.5	15.5	1.5	1.5	38.0	45.0	15.5	15.5	1.5	1.5	38.0	45.0

		Units		Module3
				RLA FLA Power Supply
Nom.Ton	Model	Hz	Volts	Comp1	Comp2	FAN1	FAN2	MCA MOP
6TON	AM072*XVTJ*	60	460
8TON	AM096*XVTJ*	60	460
12TON	AM144*XVTJ*	60	460
14TON	AM168*XVTJ*	60	460
16TON	AM192*XVTJ*	60	460
18TON	AM216*XVTJ*	60	460	11.1	11.1	1.5	1.5	28.0	35.0
20TON	AM240*XVTJ*	60	460	15.5	15.5	1.5	1.5	38.0	45.0
22TON	AM264*XVTJ*	60	460	15.5	15.5	1.5	1.5	38.0	45.0
24TON	AM288*XVTJ*	60	460	15.5	15.5	1.5	1.5	38.0	45.0

1. Module combination for AM192H****J*, AM216K****J*

		Units		Module1 Module2
				RLA FLA Power Supply				RLA FLA		Power Supply
Nom.Ton	Model	Hz	Volts	Comp1	Comp2	FAN1	FAN2	MCA	MOP	Comp1	Comp2	FAN1	FAN2	MCA	MOP
18 TON	AM216KXVGJ*	60	460	17.5	17.5	1.7	1.7	42.8	60.0
34 TON	AM408KXVGJ*	60	460	17.5	17.5	1.7	1.7	42.8	60.0	14.5	14.5	1.5	1.5	37.0	50.0
36 TON	AM432KXVGJ*	60	460	17.5	17.5	1.7	1.7	42.8	60.0	17.5	17.5	1.7	1.7	42.8	60.0

Note: 1. RLA is based on AHRI 1230 Cooling Standard Condition (Indoor Temp: 26.7°C/80°F(DB) / 19.46°C/67°F(WB), Outdoor Temp: 35°C/95°F(DB)). 2. Voltage Tolerance is ±10%. 3. Maximum allowable voltage between phases is 2%. 4. Refer to module combination table for independent units information. Symbols: 1. RLA: Rated Load Ampere. 2. FLA: Full Load Ampere. 3. MCA: Minimum Circuit Ampere (A). 4. MOP: Maximum Overcurrent Protective Device (A).

Caution for electrical work

• You must install ELCB or MCCB + ELB.
• ELCB: Earth leakage breaker
• MCCB: Molded case circuit breaker
• ELB: Earth leakage breaker
• Do not operate the outdoor unit before completing the refrigerant pipe work.
• Do not disconnect or change the cable inside the product. It may cause damage to the product.
• Specification of the power cable is selected based on the following installation conditions: culvert installation / ambient temperature 30°C (86°F) / single multi-conductor cables. If the conditions are different from those stated, please consult an electrical installation expert and re-select the power cable.

- If the length of the power cable exceeds 50m (164.04ft), re-select the power cable considering the voltage drop.

• Use a power cable made of incombustible material for the insulator (inner cover) and the sheath (outer cover).
• Do not use the power cable with the core wire exposed due to insulator damage that occurred during removal of the sheath. When the core wire is exposed, it may cause fire.

(Example of exposed core wire)

Power and communication cable configuration

▶ The main power and ground cables must be withdrawn through the knock-out hole on the bottom-right or right side of the cabinet. ▶ Withdraw the communication cable from the designated knock-out hole on the bottom-right side of the front part.

▶ Install the power and communication cables using separate cable protection tubes.

- Fix a protection tube to the knock-out hole on the outdoor unit by using a CD connector or bushing. Make sure to use an insulating bushing.

Electrical wiring work

Specification of the protection tube

Name Temper grade	Applicable conditions
Flexible PVC conduit PVC		When the protection tube is installed indoor and not exposed to outside, because it is embedded in concrete structure
Class 1 flexible conduit Galvanized steel sheet		When the protection tube is installed indoor but exposed to outside so there are risk of damage to the protection tube
Class 1 PVC coated flexible conduit	Galvanized steel sheet and Soft PVC compound	When the protection tube is installed outdoor and exposed to outside so there are risk of damage to the protection tube and extra waterproof is needed

Caution for perforating the knock-out hole

• Perforate a knock-out hole by punching it with a hammer. • After perforating the knock-out hole, apply rust-resistant paint around the hole.
• When you need to pass the cables through the knock-out hole, remove burrs on the hole and protect the cable with a protection tape or bushing, etc.

Caution for installing communication cable

- When you connect the cable, it may sag and be pressed by other parts. Therefore, cables should be fixed to a clamp highlighted with a box in the illustration.

Path for arranging external communication cable

Fixing location of the external communication cable

Power wiring diagram

▶ Connect a power cable of the outdoor unit after checking that R-S-T (3 phase 3 wire) is properly connected. Malfunction may occur if one or more of the wires among R-S-T phases (3 Phases-3 Wires) are not connected properly. (*Malfunction: Turning on/off, occurrence of error, consecutive reset) - Communication cable between indoor and outdoor units and communication cable between outdoor units has no polarity. ▶ Arrange the cables with a cable tie.

* ELCB and ELB must be installed since there is risk of electric shock or fire when they are not installed.

Electrical wiring work

Selecting solderless ring terminal

▶ Select a solderless ring terminal for a power cable according to the nominal dimensions for cable. ▶ Apply insulation coating to the connection part of the solderless ring terminal and the power cable.

Nominal dimensions for cable [mm2 (inch2)]		4/6 (0.006/0.009)		10 (0.01) 16	(0.02) 25 (0)	03) 35 (0.05) 50 (0.07)		70 (0.10)
Nominal dimensions for screw [mm (inch)]		4 (3/8) 8	(3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/1)
B	Standard dimension [mm (inch)]	9.5 (3/8)	15 (9/16) 15	(9/16) 16	(10/16) 12 (1/2)		16.5 (10/16)	16 (10/16)	22 (7/8)	22 (7/8) 24 (1)
	Allowance [mm (inch)]	±0.2 (±0.007)		±0.2 (±0.007)	±0.2 (±0.007)	±0.3 (±0.011) ±0.3 (±0.011)				±0.3 (±0.011)	±0.4 (±0.015)
D	Standard dimension [mm (inch)]	5.6 (1/4)		7.1 (1/4)	9 (3/8)	11.5 (7/16)		13.3 (1/2)		13.5 (1/2)	17.5 (1/2)
	Allowance [mm (inch)]	+0.3 (+0.011) -0.2 (-0.007)		+0.3 (+0.011) -0.2 (-0.007)	+0.3 (+0.011) -0.2 (-0.007)	+0.5 (+0.019) -0.2 (-0.007)		+0.5 (+0.019) -0.2 (-0.007)		+0.5 (+0.019) -0.2 (-0.007)	+0.5 (+0.019) -0.4 (-0.015)
d1	Standard dimension [mm (inch)]	3.4 (1/8)		4.5 (3/16)	5.8 (1/4)	7.7 (5/16)		9.4 (3/8)		11.4 (7/16)	13.3 (1/2)
	Allowance [mm (inch)]	±0.2 (±0.007)		±0.2 (±0.007)	±0.2 (±0.007)	±0.2 (±0.007)		±0.2 (±0.007)		±0.3 (±0.011)	±0.4 (±0.015)
E Min. [mm (inch)]		6 (1/4)		7.9 (5/16)	9.5 (5/16)	11 (3/8)		12.5 (1/2)		17.5 (11/16)	18.5 (3/4)
F	Min. [mm (inch)]	5 (3/16)	9 (3/8)	9 (3/8)	13 (1/2)	15 (5/8)	13 (1/2)	13 (1/2)	13 (1/2)	14 (9/16)	20 (3/4)
L	Max. [mm (inch)]	20 (3/4)	28.5 (1-1/8)	30 (1-3/16)	33 (1-5/16)	34 (1-3/8)		38 (1-1/2)	43 (1-11/16)	50 (2)	51 (2)
d2	Standard dimension [mm (inch)]	4.3 (3/16)	8.4 (1-3/16)	8.4 (1-3/16)	8.4 (1-3/16)	8.4 (1-3/16)	8.4 (1-3/16)	8.4 (1-3/16)	8.4 (1-3/16)	8.4 (1-3/16)	8.4 (1-3/15)
	Allowance [mm (inch)]	+0.2 (+0.007) 0 (0)	+0.4 (+0.015) 0 (0)	+0.4 (+0.015) 0 (0)	+0.4 (+0.015) 0 (0)	+0.4 (+0.015) 0 (0)		+0.4 (+0.015) 0 (0)		+0.4 (+0.015) 0 (0)	+0.4 (+0.015) 0 (0)
t	Min. [mm (inch)]	0.9 (0.03)		1.15 (0.04)	1.45 (0.05)	1.7 (0.06)		1.8 (0.07)		1.8 (0.07)	2.0 (0.078)

Connecting the power terminal

Connect the cables to the terminal board with solderless ring terminals.

▶ Properly connect the cables by using certified and rated cables and make sure to fix them properly so that external force is not applied to the terminal. ▶ Use a driver and wrench that can apply the rated torque when tightening the screws on the terminal board. ▶ Tighten the terminal screws by complying rated torque value. If the terminal is loose, fire can occur due to arc heat generation and if the terminal is too tight, terminal board could get damaged.

• When removing the outer sheath of the power supply cable, be careful not to scratch the inner sheath of the cable.
• Make sure that more than 20 mm (0.79 inch) of the outer sheath of the indoor unit power and communication cable are inside the electrical component box. • Install the communication cable separately from power cable and other communication cables.

Screw	Tightening torque for terminal		Remarks
	N·m lbf·ft
M4 1.2~1.8	0.9~1.3 Single phase	208~230V power cable
M8 5.5~7.3	4.1~5.4 3 phase	208~230V / 460V power cable

Electrical wiring work

Examples of how to use the cable stripper

1. Adjust the blade position using a coin. (The controller is located at the bottom of the tool.) Set the blade position according to the thickness of the power cable's outer sheath.
2. Secure the power cable and the tool using the hook at the top of the tool.
3. Cut through the outer sheath of the power cable by rotating the tool in the direction of the arrow two or three times.
4. In this position, cut through the outer sheath of the power cable by moving the tool in the direction of the arrow.
5. Slightly bend the wire and pull out the cut section of the outer sheath.

Securing the power cable

• Do not allow the power cable to come into contact with the pipes inside the outdoor unit. If the power supply cable touches the pipes, the compressor's vibration is transferred to the pipes and can damage the power supply cables or pipes, creating a risk of fire or explosion.
• Ensure that the section of the power supply cable where the sheath has been removed is inside the power supply box. If this is not possible, connect a protection tube for the power cable to the power supply box. • After arranging the power cable inside the power supply box, tighten the cover.

Connect the ring terminal of the 3-phase cable

1. Cut the power cable to an appropriate length and connect it using a solderless terminal.
2. After connecting the power cable to the terminal as shown in the illustration, secure it with a cable tie.
3. Attach the housing, which has an insulator, to the terminal board.

Electrical wiring work

Ground cable fixing

Connect the ground cable to the grounding hole inside the power supply box.

Power cable routing

▶ Routing from the front - Connect the power cable protection tube into the power supply box as shown in the picture. - Ensure that the power supply cable is not damaged by burrs on the knock-out hole.

Installing the Solution device

When the number of indoor units installed with the outdoor unit is 16 or less

Electrical wiring work

Connecting the MCU

Example 1

Example 2

Power must be supplied to the MCU separately from the outdoor unit.

▶ B Connect the communication cable of the outdoor unit (F1, F2) to the communication cable of the MCU (F1, F2)

- When installing the MCU, the communication cable can be connected as shown above.

Connecting the MCU (MCU-S6NEK2N, MCU-S4NEK3N, MCU-S2NEK2N, MCU-S1NEK1N)

Example

▶ Power must be supplied to the MCU separately from the outdoor unit. ▶ B Connect the communication cable of the outdoor unit (F1, F2) to the communication cable of the MCU (F1, F2)

CAUTION

- Power cable connection should be done with the solderless ring terminal.

- When installing the MCU, the communication cable can be connected as shown above.

Electrical wiring work

Grounding work

Grounding must be done by a qualified installer for your safety.

Grounding the power cable

The standard of grounding may vary according to the rated voltage and installation place of the air conditioner.

▶ Ground the power cable according to the following table.

Installation place\Power condition	Voltage to ground is lower than 150V Voltage to ground is over 150V
High humidity	Must perform the grounding work 3. Note 1)(Including the case where earth leakage breaker is installed)
Average humidity Perform grounding work 3. Note 1)	Must perform the grounding work 3. Note 1)(Including the case where earth leakage breaker is installed)
Low humidity	Perform grounding work 3, if possible, for your safety. Note 2)

Note 1) About grounding work 3.

• Grounding work must be done by an expert (with qualification).
• Check if the grounding resistance is lower than 100Ω. When installing an earth leakage breaker (that can cut the electric circuit within 0.5 second in case of a short circuit), allowable grounding resistance should be 30~500Ω.

Note 2) Grounding at dry place

- The grounding resistance should be lower than 100Ω . Even in worst case, grounding resistance should be lower than 250Ω .

Performing the grounding work

▶ Use a rated grounding cable by referring to the specification of the electric cable for the outdoor unit.

* When using the exclusive grounding terminal (When the grounding terminal is already built on the house)

* When using grounding of the switch board

Air tightness test and vacuum drying

Air tightness test

▶ Use tools for R-410A to prevent the inflow of foreign substances and resist against the internal pressure.

▶ Do not remove the core of filling port. ▶ Use Nitrogen gas for air tightness test as shown in the illustration.

H/PH/R

If you apply pressure at more than 4.1MPa(594.6psi), pipes may get damaged. Apply pressure with pressure regulator and pay attention to the pressure of the nitrogen.

After applying Nitrogen gas, check there's any change of pressure, using a pressure regulator.

If the pressure is changed, apply soap water to check for leakage and check the pressure of the nitrogen gas again.

After checking the first gas leakage, maintain 1.0MPa (145psi) to check for further gas leakage.

Perform a Nitrogen gas leak test with the service valve of the outdoor unit closed. - When charging the nitrogen gas, charge it from both the high and low pressure sides. - If the pipe is filled in a short time with a highly excessive pressure of Nitrogen gas, the pipes may get damaged. Make sure to use a regulator to prevent the high pressure Nitrogen gas, over 4.1MPa (594.6psi), from entering into the pipe.

Air tightness test and vacuum drying

Vacuum drying pipes and indoor units

▶ Use tools for R-410A to prevent the inflow of foreign substances and resist against the internal pressure. ▶ Use vacuum pump that allows vacuuming under -100.7kPa (5 Torr). ▶ Use the vacuum pump with the check valve to prevent pump oil from flowing backward while the vacuum pump is stopped. ▶ Completely close the liquid-gas side service valve of the outdoor unit.

When installing outdoor units in module, connect the manifold gauge to liquid side pipe and the gas side pipe.

Make sure that check valve is installed to prevent pump oil from flowing into the pipe.

Vacuum pressure must be checked with the vacuum gauge.

* If the pressure rises in an hour, either water is remaining inside the pipe or there is a leakage. * When the ambient temperature of vacuuming pipe is low (less than 0°C (32°F)), moisture might remain within the pipe. Therefore, pay special attention to the pipe sealing in the winter.

Pipe insulation

Insulating the refrigerant pipes and branch joints

▶ Check for gas leakage before completing (the hose and pipe insulation) and if there is no sign of leakage, make sure to insulate the pipes and hoses.

▶ Use EPDM material insulator that meets the following conditions.

Test item Unit Standard
Density g/cm	3	0.048~0.096
Dimensional change rate by heat % Below -5
Absorption rate g/cm	3	Below 0.005
Thermal conduction rate W/m·K Below 0.037
Moisture transpiration factor ng/(m)	2·s·Pa) Below 15
Moisture transpiration grade g/(m)	2·24h) Below 15
Formaldehyde dispersion mg/L	There should be none
Oxygen rate	%	Over 25

Selecting the refrigerant pipe insulator

▶ Insulate the gas pipe and liquid pipe by referring to the thickness of insulator for each pipe size. The standard condition is; temperature at 30°C, humidity less than 85%. If case if the humidity is higher, you must increase the size by one grade as stated in below table.

Pipe	Outer diameter		Insulator (Cooling, Heating)				Remarks
			General[30°C (86°F), 85%]		High humidity[30°C (86°F), over 85%]
			EPDM, NBR
	mm	inch	mm	inch	mm	inch
Liquid pipe	6.35~9.52	1/4~3/8	9	3/8	9	3/8	Heating resisting temperature over 120°C(248°F)
	12.7~50.8	1/2~2	13	1/2	13	1/2
Gas pipe	6.35	1/4	13	1/2	19	3/4
	9.52~25.4	3/8~1	19	3/4	25	1
	28.58~44.45	1 1/8~1 3/4	19	3/4	32	1 1/4
	50.8	2	25	1	38	1 1/2

* When installing insulation in places and conditions below, use the same insulation that is used for high humidity conditions.

- High humidity places such as shoreline, hot spring, near lake or river, and ridge (when the part of the building is covered by earth and sand.)

- Restaurant ceiling, sauna, swimming pool etc.

• The ceiling frequently exposed to moisture and cooling is not covered. (e.g. The pipe installed at a corridor of a dormitory and studio or near an exit that opens and closes frequently.)
• The place where the pipe is installed is highly humid due to the lack of ventilation system.

Pipe insulation

Insulate the refrigerant pipe

▶ Make sure to insulate the refrigerant pipe, branch joint, distribution header, and the connection part of the pipes.

If you insulate the pipes, condensed water will not fall from the pipes. ▶ Check if there are any cracks on the insulation at the bent part of the pipe.

Insulating pipes Insulating pipes connected behind the EEV kit

• The insulation of the gas and liquid pipes can be in contact with each other but they should not press excessively against each other.
• When the gas side and liquid side pipes are contacting each other, increase the thickness of the insulation by one grade.

• When installing the gas side and liquid side pipes, leave at least 10mm (3/8") of space.
• When the gas side and liquid side pipes are contacting each other, increase the thickness of the insulation by one grade.

• Install the insulation without any gaps or cracks and use adhesive on the connection part of it to prevent moisture from entering. - Bind the refrigerant pipe with insulation tape if it is exposed to outside sunlight. (When binding the pipe with finishing tape, be careful not to reduce the thickness of the insulation.) • Install the refrigerant pipe respecting that the insulation does not get thinner on the bent part or hanger of pipe. - When the thickness of insulation is reduced, reinforce the reduced thickness with additional insulation.

Insulate the distribution header

Fix the distribution header with a cable tie and cover the connected part.

Insulate the distribution header and the welded part, and wrap the connected part with adhesive insulation tape to prevent condensation.

Fix the distribution header with a hanger after insulating it.

Insulating the branch joint

Tightly attach the insulator provided with the branch joint to the separately purchased insulator. Wrap the connected part with an insulator (separately purchased) that is at least 10mm (0.39 inch) thick. Use an insulator that can withstand heat up to 120°C. Wrap the branch joint with insulation that is at least 10mm (0.39 inch) thick.

The thickness of the insulator (separately purchased) should be greater than 10mm (0.39 inch).

Insulation tape (separately purchased)

Attach the adhesive insulation tape to the pipe, as shown in the picture, after insulating the pipe.

Pipe insulation

Insulating the pipe inside the outdoor unit

Use a pipe insulator to insulate the pipe up to the entire service valve inside the outdoor unit. Seal the gap between the outdoor unit pipe and the insulator. Rainwater and condensation may seep through the gap between the pipe and the insulation of the outdoor unit installed outside. Separate the pipe cover and close it after insulation work. Only remove the knock-out hole cover where the pipe will be installed. If the knock-out hole is left open unnecessarily, it must be closed. Otherwise, small animals such as squirrels and rats may enter the unit through the hole and cause damage.

H/P

H/R

Charging additional refrigerant

▶ R-410A refrigerant is a blended refrigerant. Add refrigerant in liquid form only. (Make sure to use the refrigerant cylinder in an upright position) ▶ Measure the quantity of refrigerant according to the length of the liquid side pipe. Add a fixed quantity of refrigerant using a scale.

Single installation

▶ Open the manifold gauge valve connected to the liquid side service valve and add the liquid refrigerant. ▶ If you cannot add the entire quantity of refrigerant while the outdoor unit is stopped, open the gas side and liquid side service valves. Then, add the remaining refrigerant by pressing the refrigerant adding button on the outdoor PCB.

Charging additional refrigerant

Module installation

▶ Open the manifold gauge valve connected to the liquid side service valve and add the liquid refrigerant. If you cannot add the entire quantity of refrigerant while the outdoor unit is stopped, open the gas side and liquid side service valves. Then, add the remaining refrigerant by pressing the refrigerant adding button on the outdoor PCB. If you use the refrigerant charging function from the PCB, the outdoor unit will operate and charge the refrigerant. At this time, you must use the gas side manifold gauge for cooling operation and use the charging port for heating at the manifold gauge for heating operation.

• Open the gas side and liquid side service valves completely after charging the refrigerant. (If you operate the air conditioner with the service valves closed, the important parts may be damaged.)
• Put on safety equipment when charging refrigerant.
• Do not charge the refrigerant when you adjust or control other products such as indoor units or EEV kits.
• If you charge the refrigerant with the front cabinet open, be very careful with the fan on the top of the product to prevent personal injury.
• When the ambient temperature is low in winter, do not heat the refrigerant container to speed up the charging process. There is a risk of explosion.
• Beware of the possibility of refrigerant leakage when you connect the manifold gauge to the charging port for heating.
• Close the valve of the refrigerant container immediately after charging the refrigerant. If not, there might be a change in the entire amount of refrigerant.

Using service valve for gas

▶ After charging the refrigerant, close all caps as shown in the illustration. ▶ Tightening torque for the cap of the refrigerant charging port: 10~12 N·m (7.4 ~ 8.9 lbf·ft) ▶ Tightening torque for the cap of the control part: 20~25 N·m (14.8 ~ 18.4 lbf·ft) ▶ Opening/closing torque for the valve - Over ∅19.05mm (∅3/4 inch): 10 N·m (7.4 lbf·ft)

Cap for the control part

Cap for the refrigerant charging port

Basic segment display

Step Display content	Display
At initial power input Checking	segment display	SEG 1 SEG	2 SEG 3 SEG 4
		“8” “8” “8” “8”
While setting communication between indoor and outdoor unit (Addressing)	Number of connected indoor units	SEG 1 SEG	2 SEG 3 SEG 4
		“A”“d”		Number of communicated units* Refer to "View Mode" for communication address
After communication setting (usual occasion)	Transmit/Reception address	SEG 1 SEG	2 SEG 3 SEG 4
		I/U:“A”MCU:“C”	I/U:“0”MCU:“1”	Reception address (in decimal number)

* I/U : Indoor unit

Setting outdoor unit option switch and key function

Setting outdoor unit option switches : A TYPE

* If you install HR products, you must match the address between the MCU and the indoor unit.

Switch Setting Function			Remarks
SW51 / SW52			Setting total number of installed indoor unitSW51: Tens digit, SW52: Units digit	Setting can be done from the main outdoor unit only (sub unit: setting is unnecessary)Ex) When 12 indoor units are installed → SW51: 1, SW52: 2
SW53	K6	On	Enable maximum capacity restriction for cooling operation	Restrict excessive capacity increase when operating indoor units with small capacity
		Off	Disable maximum capacity restriction for cooling operation	-
	K7	K8	Selecting outdoor unit address
	On	On	Outdoor unit address: No. 1	Main unit
	On	Off	Outdoor unit address: No. 2	Sub unit 1
	Off	On	Outdoor unit address: No. 3	Sub unit 2
	Off	Off	Outdoor unit address: No. 4	Sub unit 3
SW57			Setting total number of connected MCU	Setting can be done from Main unit only.Ex) When 3 MCUs are installed → SW57:3, When 10 MCUs are installed → SW57:A

Setting outdoor unit option switch and key function

Setting outdoor unit option switches : B TYPE

▶ Setting outdoor install option

Step Button Display Description Note
Outdoor unit address
Step1	Outdoor unit display	od nd	Setting required -
Step2	Press (K1+K2) for 2 seconds	od 00	Unit address for module combination	00: Main unit
	K4 x 1 time	od 01		01: Sub1 unit
	K4 x 2 times	od 02		02: Sub2 unit
	K4 x 3 times	od 03		03: Sub3 unit
Step3	If it is main unit, go to step4. Otherwise, press K2 button for 2 seconds to save & exit (system will be reset)
Quantity of indoor units
Step4 Press K1		-1d 00	Ready to set -
Step5	K2 x n times	-1d X0	Tens digit (0 ~ 6)	Ex) 03: 3 units64: 64 units
	K4 x n times	-1dOX	Ones digit (0 ~ 9)
	*K4: Press for 2 seconds - automatic detection of indoor units' quantity
Step6	If it is heat recovery model, go to step 7. Otherwise, press K2 button for 2 seconds to save & exit (system will be reset)
Quantity of MCUs * Heat recovery model only
Step7 Press K1		NC 00	Ready to set -
Step8	K2 x n times	NC X0	Tens digit (0 ~ 1)	Ex) 03: 3 units16: 16 units
	K4 x n times	NCOX	Ones digit (0 ~ 9)
	*K4: Press for 2 seconds - automatic detection of MCUs' quantity
Step9 K2: long		8d 00	Save Restart
*Press K1 for 2 seconds to exit without save regardless of setting step.

Setting the option

1. Press and hold K2 to enter the option setting. (Only available when the operation is stopped)

- If you enter the option setting, display will show the following. (If you have set the 'Emergency operation for compressor malfunction', 1 or 2 will be displayed on Seg 4.)

- Seg 1 and Seg 2 will display the number for selected option.

- Seg 3 and Seg 4 will display the number for set value of the selected option.

1. If you have entered option setting, you can shortly press the K1 switch to adjust the value of the Seg 1, Seg 2 and select the desired option. (Refer to pages 81~83 for the Seg number of the function for each option)

Example)

1. If you have selected desired option, you can shortly press the K2 switch to adjust the value of the Seg 3, Seg 4 and change the function for the selected option. (Refer to pages 81~83 for the Seg number of the function for each option)

Example)

1. After selecting the function for options, press and hold the K2 switch for 2 seconds. Edited value of the option will be saved when entire segments blinks and tracking mode begins.

- Edited option will not be saved if you do not end the option setting as explained in above instruction.

* While you are setting the option, you may press and hold the K1 button to reset the value to previous setting.

* If you want to restore the setting to factory default, press and hold the K4 button while you are in the option setting mode.

- If you press and hold the K4 button, setting will be restored to factory default but it doesn't mean that restored setting is saved. Press and hold the K2 button. When the segments shows that tracking mode is in progress, setting will be saved.

Optional item Input unit SEG1		SEG2	SEG3	SEG4	Function of the option Remarks
Emergency operation for compressor malfunction	Individual 0	0		0	0	Disabled	(Factory default)	E560 will occur when all the compressors are set as malfunction state.
				0	1	Set compressor 1 as malfunction state
				0	2	Set compressor 2 as malfunction state

Setting outdoor unit option switch and key function

Optional item Input unit SEG1	SEG2	SEG3	SEG4	Function of the option Remarks
Cooling capacity correction	Main 0 1			0	0	7-9 (Factory default in case of A type PBA)	Targeted evaporation temperature [°C].(When low temperature value is set, discharged air temperature of the indoor unit will decrease)
				0	1	5-7 (Factory default in case of B type PBA)
				0 2 9	-11
				0 3 1	0-12
				0 4 1	1-13
				0 5 1	2-14
				0 6 1	3-15
Capcity correction for heating	Main 0 2			0 0 3	0 (Factory default)		Targeted high pressure [MPa].(When low pressure value is set, discharged air temperature of the indoor unit will decrease)
				0	1	2 . 5
				0	2	2 . 6
				0	3	2 . 7
				0	4	2 . 8
				0	5	2 . 9
				0	6	3 . 1
				0	7	3 . 2
				0	8	3 . 3
Current restriction rate	Individual 0 3			0 0 1	100% (Factory default)		When restriction option is set, cooling and heating performance may decrease.
				0 1 9	5 %
				0 2 9	90 %
				0 3 8	5 %
				0 4 8	80 %
				0 5 7	5 %
				0 6 7	70 %
				0 7 6	5 %
				0 8 6	60 %
				0 9 5	5 %
				1 0 5	50 %
				1 1		No restriction
Oil collection interval	Main 0 4			0 0		Factory default
				0 1 Shorten the interval by 1/2
Temperature to trigger defrost operation	Main 0 5			0 0		Factory default
				0	1	Apply setting when the product is being installed in humid area such as near river or lake
Fan speed correction for outdoor unit	Individual 0 6			0 0		Factory default
				0 1		Increase fan speed	Increase the outdoor unit's fan speed to maximum value
Silent mode Main 07				00	Disabled	(Factory default)	Enables the silent mode for night-time in cooling mode (It operates automatically depending on the temperature.) However, if the external contact interface module (MIM-B14) is used, entering the silent mode is available with contact signal in cooling and heating mode. (A type PBA: this function is used in cooling mode.)
				01	LEVEL 1	Auto
				02	LEVEL 2	Auto
				03	LEVEL 3	Auto
				04	LEVEL 1	External contact
				05	LEVEL 2	External contact
				06	LEVEL 3	External contact
High-head condition setting	Main 08			00	Disabled	(Factory default)
				0	1	Level 1 of height difference type 1 (Indoor unit is lower than outdoor unit)	When outdoor unit is located 40~80m above the indoor unit
				0	2	Level 2 of height difference type 1 (Indoor unit is lower than outdoor unit)	When outdoor unit is located over 80m above the indoor unit
				0	3	Height difference type 2 (Outdoor unit is lower than indoor unit)	When indoor unit is over 30 m above the outdoor unit
Long-pipng condition setting (Setting is unnecessary if high-head condition is set)	Main 09			00	Disabled	(Factory default)
				01	LEVEL 1		When equivalent length of farthest indoor unit from the outdoor unit is between 100~170m
				02	LEVEL 2		When equivalent length of farthest indoor unit from the outdoor unit is over 170m
Energy saving setting (A Type PBA)	Main 10			00	Disabled	(Factory default)
				01	Enabled		Energy saving mode triggers when the room temperature reaches desired temperature while operating in heating mode.
Energy control Operation (B Type PBA)	Main 10			00	Basic (Factory default)	Energy control option of designated operation sequence* Operating in energy saving mode, capacity might decrease compared to normal operation mode
				01		Energy saving
				0	2	Power
Rotation defrost (HR only)	Main 11			00	Disabled	(Factory default)
				01	Enabled		When enabled, continuous heating operation is possible but heating performance will decrease during rotation defrost operation

Setting outdoor unit option switch and key function

Optional item Input unit SEG1		SEG2	SEG3	SEG4	Function of the option Remarks
Expand operational temperature range for cooling operation (HR only)	Main 1 2			0 0	Disabled	(Factory default)
				0 1	Enabled			When enabled, continuous cooling operation is possible even in low temperature condition up to -15°C, but noise of the MCU will increase
Channel address Main 1 3				A	U	Automatic setting (Factory default)		Address for classifying the product from upper level controller (DMS, S-NET 3, etc.)
				0~15		Manual setting for channel 0~15
Snow accumulation prevention control	Main 1 4			0 0	Enabled	(Factory default)		During snow accumulation, the fan may spin even when the unit is not in operation
				0 1	Disabled
Unused option Main 1 5 0 0 Unused option Unused option by this model
Unused option Main 1 6 0 0 Unused option Unused option by this model
Speed operation Main 1 7				0 0	Disabled	(Factory default)		Enabling this setting will command the air conditioner to cool/heat faster at initial start-up. However, this function will not work when High-head condition setting or Long-piping condition setting is enabled.
				0 1	Enabled
Max. capacity restriction (B type PBA)	Main	1	8	0 0	Enabled	(Factory default)		Restrict excessive capacity increase when operating indoor units with small capacity
				0 1	Disabled
Gasleak Pumpdown (B type PBA)	Main	1	9	0 0	Disabled	(Factory default)		If the gas leak occurred it should be entered in the pumpdown operation.
				0 1	Enabled
Unused option Main 2 0 0 0 Unused option								Unused option by this model
LA KIT option	Main 2 1			0 0	Disabled	(Factory default)		Set when LA KIT is installed.
				0 1	Enabled
Emergency operation for indoor unit communication error	Main 2 2			0 0	Disabled	(Factory default)		When set, emergency operation is possible even if an indoor communication error occurs.
				0	1	Indoor high humidity condition (operating for up to 12hours)
				0	2	Indoor low humidity condition (operating for up to 24hours)
Base Heater	main 2 3			0 0	Disabled	(Factory default)		-
				0 1	Enabled

* There is a risk of water leakage during emergency operation for indoor unit communication error. Please be careful when using it.

K1 control KEY	operation Display on segment
Press and hold 1 time	Auto trial operation "K""K""BLANK""BLANK"

K1 (Number of press)	KEY operation Display on segment
1 time Refrigerant charging in Heating mode "K" "1" "BLANK" "BLANK"
2 times Trial operation in Heating mode "K" "2" "BLANK" "BLANK"
3 times Pump out in Heating mode (Outdoor unit address 1) "K" "3" "BLANK" "1"
4 times Pump out in Heating mode (Outdoor unit address 2) "K" "3" "BLANK" "2"
5 times Pump out in Heating mode (Outdoor unit address 3) "K" "3" "BLANK" "3"
6 times Pump out in Heating mode (Outdoor unit address 4) "K" "3" "BLANK" "4"
7 times Vacuumig (Outdoor unit address 1)		"K" "4" "BLANK" "1"
8 times Vacuumig (Outdoor unit address 2)		"K" "4" "BLANK" "2"
9 times Vacuumig (Outdoor unit address 3)		"K" "4" "BLANK" "3"
10 times	Vacuumig (Outdoor unit address 4)	"K" "4" "BLANK" "4"
11 times	Vacuuming (All outdoor units)	"K" "4" "BLANK" "A"
12 times	End Key operation	-

Setting outdoor unit option switch and key function

K2 (Number of press) KEY operation Display on segment
1 time Refrigerant charging in Cooling mode “K” “5” “BLANK” “BLANK”
2 times Trial operation in Cooling mode “K” “6” “BLANK” “BLANK”
3 times Pump down all units in Cooling mode “K” “7” “BLANK” “BLANK”
4 times	H/R: Checking the pipe connectionH/P: Automatic setting of operation mode(Cooling/Heating) for trail operation	“K” “8” “BLANK” “BLANK”
5 times Checking the amount of refrigerant		“K” “9” X X (Display of last two digits may differ depending on the progress)
6 times Discharge mode of DC link voltage “K” “A” “BLANK” “BLANK”
7 times Forced defrost operation “K” “B” “BLANK” “BLANK”
8 times Forced oil collection “K” “C” “BLANK” “BLANK”
9 times	Inverter compressor 1 check “K” “D” “BLANK” “BLANK”
10 times	Inverter compressor 2 check	“K” “E” “BLANK” “BLANK”
11 times	Fan 1 check	“K” “F” “BLANK” “BLANK”
12 times	Fan 2 check	“K”“G”“BLANK”“BLANK”
13 times	H/R : Auto pipe pairingH/P : Unused	“K”“H” X X (Display of last two digits may differ depending on the progress)
14 times	Base heater testing mode	“K”“I”“BLANK”“BLANK”
15 times	End Key operation	-

* During "Discharge mode of DC link voltage", voltage of INV1 and INV2 will be displayed alternately. * Even when the outdoor unit power is off, it is dangerous when you come in contact with inverter PCB and fan PCB since they are charged with high DC voltage. * When pressing K2 key 9 to 12 times without inverter checker, error code can be displayed on segment even though the outdoor unit is normal. * When replacing/repairing the PCB, cut-off the power and wait until the DC voltage is discharged before replacing/repairing them. (Wait for more than 15 minutes to allow it to discharge naturally.) * When there were error, 'Discharge mode of DC link voltage' may not have been effective. Especially if error E464 and E364 have been occurred, power element might be damaged by fire and therefore, do not use the 'Discharge mode of DC link voltage'. * If the 1st-generation MCU is installed, the Auto pipe pairing operation can not be used. If the 2nd-generation MCU is installed, the Checking the pipe connection can not be used.

- 1st-generation MCU : MCU-S*NEE*N, MCU-S2NEK1N

- 2nd-generation MCU : MCU-S *NEK2N, MCU-S4NEK3N, MCU-S1NEK1N

* If there is an A type PBA among the outdoor units installed as a module, the Auto pipe pairing operation can not be used.

* When ODU is working on "Base Heater testing mode", or in normal "base heater working" condition, do not touch the heater and near base plate. You could be get serious burn.

* When you check Base heater's working, you have to use "non-contact thermometer"

K3 (Number of press)	KEY operation	Display on segment
1 time	Initialize (Reset) setting	Same as initial state

K4 (Number of press)	KEY operation	Display on segment
		SEG 1	SEG2, 3, 4
1 time Outdoor unit model 1			(a) Capacity → Off, 1, 4
2 times Order frequency of the compressor 1 2			120 Hz → 1, 2, 0
3 times Order frequency of the compressor 2 3			120 Hz → 1, 2, 0
4 times High pressure (MPa) 4			1.52 MPa → 1, 5, 2
5 times Low pressure (MPa) 5			0.43 MPa → 0, 4, 3
6 times Discharge temperature (Compressor 1) 6			87 °C → 0, 8, 7
7 times Discharge temperature (Compressor 2) 7			87 °C → 0, 8, 7
8 times IPM temperature (Compressor 1) 8			87 °C → 0, 8, 7
9 times IPM temperature (Compressor 2) 9			87 °C → 0, 8, 7
10 times CT sensor value (Compressor 1) A			2 A → 0, 2, 0
11 times CT sensor value (Compressor 2) B			2 A → 0, 2, 0
12 times Suction temperature	C		-42 °C → -, 4, 2
13 times COND OUT temperautre	D		-42 °C → -, 4, 2
14 times Temperature of liquid pipe	E		-42 °C → -, 4, 2
15 times TOP temperature (Compressor 1) F			-42 °C → -, 4, 2
16 times TOP temperature (Compressor 2)	G		-42 °C → -, 4, 2
17 times Outdoor temperature	H		-42 °C → -, 4, 2
18 times EVI inlet temperature	I		-42 °C → -, 4, 2
19 times EVI outlet temperature	J		-42 °C → -, 4, 2
20 times Main EEV1 step	K		2000 steps → 2, 0, 0
21 times Main EEV2 step	L		2000 steps → 2, 0, 0
22 times EVI EEV step	M		300 steps → 3, 0, 0
23 times HR EEV step	N		300 steps → 3, 0, 0
24 times Fan step (SSR or BLDC)	O		13 steps → 0, 1, 3

Setting outdoor unit option switch and key function

K4 (Number of press)	KEY operation	Display on segment
		SEG 1	SEG2, 3, 4
25 times Current frequency (Compressor 1) P		120 Hz → 1,2,0
26 times Current frequency (Compressor 2) Q		120 Hz → 1,2,0
27 times Suction 2 temperature R		-42 °C → -, 4, 2
28 times Main indoor unit address S		Main indoor unit not selected → BLANK, N, DIf indoor unit No.1 is selected as the main unit → 0, 0, 1
29 times Snow Sensor Voltage T		1.80 V → 1, 8, 0

(a) When pressing K4 key 1 time, below number is displayed on segment depending on model.

Model Display on segment
AM072** * Off, 0, 8
AM096** * Off, 1, 0
AM120** * Off, 1, 2
AM144** * Off, 1, 4
AM168** * Off, 1, 8
AM192** * Off, 2, 0
AM216** * Off, 2, 2

K4 (Number of press)Press and hold the K4 to enter the setting	Displayed content	Display on segment
		page1	page2
1 time Main version	MAIN	Version (ex. 1412)
2 times Hub version	HUB	Version (ex. 1412)
3 times	Inverter 1 version	INV1	Version (ex. 1412)
4 times	Inverter 2 version	INV2	Version (ex. 1412)
5 times	Fan 1 version	FAN1	Version (ex. 1412)
6 times	Fan 2 version	FAN2	Version (ex. 1412)
7 times	EEP version EEP Version (ex. 1412)
8 times	Automatically assigned address of the units	AUTO	SEG1	SEG2 SEG3, 4
			Indoor unit: “A”MCU: “C”	Indoor unit: “0”MCU: “1”	Address(ex: 07)
9 times	Manually assigned address of the units	MANU	SEG1	SEG2 SEG3, 4
			Indoor unit: “A”	Indoor unit: “0”	Address(ex: 15)

Setting the MCU and Pipe Addresses (for HR Only)

You can set the MCU address, the MCU ports to use, and the address for each MCU port connected to each indoor unit.

It is for 2nd-generation MCU only. (MCU-S* NEK2N, MCU-S4NEK3N, MCU-S1NEK1N)

Setting the MCU address and the MCU ports to use

You can set the MCU address and the MCU ports on the MCU PBA.

MCU address switch

DIP switch

S/W option DIP switch

1. Set the MCU address switch to a value. If two or more MCUs are installed, be sure to set a unique value for each MCU. For the MCU address, you can set a value from 0 to 15.
2. For each MCU port connected to an indoor unit through piping, set its DIP switch to ON. For other MCU ports, set their DIP switches to OFF. You can find the address (A to F) of an MCU port on the indoor unit piping connection.
3. If two MCU ports are connected to an indoor unit through a Y-joint, set the relevant S/W option DIP switch to the settings given in the following table:

S/W option DIP switch No.	ON(Individual connection)	OFF(Shared connection)
1 Each of ports A and B Both ports A and B
2 Each of ports C and D Both ports C and D
3 Each of ports E and F Both ports E and F

* You cannot make a shared connection for the two ports B and C, and D and E at the same time.

Setting the MCU and Pipe Addresses (for HR Only)

1. Set the address of each MCU port that is connected to an indoor unit by taking the procedures in Setting the Pipe Addresses Manually or Setting the Pipe Addresses Automatically. (Auto pipe pairing operation)

CAUTION

• If the following models are connected, set the pipe addresses manually by referring to Setting the Pipe Addresses Manually.
• ERV plus (AM****NKDE*), OAP duct (AM****NEPE*), Hydro Unit (AM****NBDE*, AM****NBF**), AHU kit (MXD-K****AN, MCM-D****N)
• If 1st-generation MCU (MCU-S *NEE*N, MCU-S2NEK1N) is installed, refer to the corresponding install manual.

Setting the Pipe Addresses Manually

You can use the wired or wireless remote control or the S-NET Pro 2 to set the pipe addresses for each indoor unit.

Setting by using the wired or wireless remote control (For how to operate the remote control buttons, see the remote control user manual.)

1. Turn on both the indoor unit and the remote control.
2. Enter the "Option setting mode" on the remote control.
3. Set the address of each MCU port that is connected to an indoor unit by referring to the following table. (You can also set the address of each indoor unit.)

Option SEG1 SEG2 SEG3 SEG4 SEG5 SEG6
Value	0	A: Address setting mode	0: The address of the indoor unit will not be set.1: The address of the indoor unit will be set.	0 to 9: Hundreds digit of the indoor unit address	0 to 9: Tens digit of the indoor unit address	0 to 9: Units digit of the indoor unit address
Option SEG7 SEG8			SEG9 SEG10 SEG11 SEG12
Value	1	0	0: The RMC address will not be set.1: The RMC address will be set.	0	0 to F: RMC group channel	0 to F: RMC group address
Option SEG13 SEG14			SEG15 SEG16 SEG17 SEG18
Value	2	0	0: The MCU address will not be set.1: The MCU address will be set.	0 to 1: Tens digit of the MCU address	0 to 9: Units digit of the MCU address	A to F: MCU port address
Option SEG19 SEG20 SEG21 SEG22 SEG23 SEG24
Value	3	0	0	0	0	0

Examples> If the indoor unit whose address is not yet set is connected to port A on the MCU 1, set 0A0000-100000-20101A-300000.

If the indoor unit whose address is set to 9 is connected to port B on the MCU 2, set 0A1009-100000-20102B-300000.

▶ Set the pipe addresses by using Add-on > Change address on S-NET Pro 2. (For more information, see the S-NET Pro 2 Help.)

Setting the Pipe Addresses Automatically (Auto pipe pairing operation)

You can use the Automatic pipe-address setting operation to automatically set the address of each MCU port that is connected to an indoor unit.

If an MCU port is set incorrectly or a pipe between an MCU and an indoor unit is connected incorrectly, that indoor unit is indicated.

Check items before running the Auto pipe pairing operation

1. Ensure that the service valve of the outdoor unit is open.
2. Ensure that the power cables and communication cables of the indoor and outdoor units are correctly connected.
3. Turn on the indoor and outdoor units 6 hours before running the Automatic pipe-address setting operation to warm up both units sufficiently.
4. Before turning on the power, check whether the voltages and phases are correct by using a voltmeter and a phase tester.
5. R,S,T terminal: check the 460V between wires (R-S, S-T, T-R) (AM****XV*J* Model only) / 230V between wires (R-S, S-T, T-R) (AM****XV*F* Model only).
6. After the power is turned on, set the devices (indoor unit, MCU, and others) that are connected to the outdoor unit, and set the options. Note that, before the MCU port addresses are set, MCU port setting errors (E213, 216, 217, 218) may occur. You can run the Automatic pipe-address setting operation regardless of MCU port setting errors.
7. If the OAP (Outdoor Air Processing) Duct or Hydro unit is connected, set the pipe addresses manually, referring to [Setting the Pipe Addresses Manually].
8. Check the operating temperature for the Automatic pipe-address setting operation. If this operation is run at a temperature outside the operating temperature range, the addresses set automatically may be incorrect. Set the pipe addresses manually by referring to Setting the Pipe Addresses Manually.
9. The Auto pipe-pairing operation does not work within 3 minutes after power on and reset due to communication check.

[Operating temperature for the Auto pipe pairing operation]

* Before running the Auto pipe pairing operation, be sure to close the front cabinet. If this operation is run with the front cabinet open, the product may be damaged and the pipe addresses cannot be correctly recognized.

Setting the MCU and Pipe Addresses (for HR Only)

To run the Auto pipe pairing operation, take the following steps:

1. Press the K2 button 13 times on the main PBA of the outdoor unit to start the Auto pipe pairing operation. (Display:)

	Outdoor temperature < 24°C (75°F)	24°C (75°F) ≤ Outdoor temperature < 30°C(86°F)	30°C(86°F) ≤ Outdoor temperature
Indoor temperature < 24°C(75°F)	Main heating operation Main	heating operation Main cooling operation
Indoor temperature ≥ 24°C(75°F)	Main heating operation Main	cooling operation Main cooling operation

Each step is indicated on the outdoor unit display. (The whole operation takes about 25 to 55 minutes normally, depending on the number of indoor units connected. However, it can be operated for up to 2 hours to protect the compressor.)

- Step 1 (Start PhO1) → Steps 2 to 8 (Setup PhO8) → Step 9 (Check PhO9) → Step 10 (Confirmation PhIO)

1. When the Auto pipe pairing operation finishes, the following data is shown on the outdoor unit display.

Result Outdoor unit display Description
Setting completed End
Setting error	E191 ↔ Indoor unit data (displayed alternately)	Indoor unit data- SEG 1,2 = indoor unit address / SEG 3,4 = error status00: An MCU port is not disabled, or a pipe is not connected.01: Cooling only indoor unit is connected to MCU.02: The shared setting for two ports is incorrect.Example) When the MCU port connected to the indoor unit 12 is disabled, E191 and 1200 are displayed alternately- If two or more indoor units have setting errors, the data about the next indoor unit is displayed each time you press the K2 switch.

• If the MCU ports to use are set incorrectly, the Auto pipe pairing operation may stop due to high-pressure or low-pressure protection control, or the data about the indoor unit that has a MCU port setting error may be incorrect. Ensure that the MCU ports to use are set correctly.
• Depending on the indoor and outdoor temperatures, the Auto pipe pairing operation may stop due to protection control.
• If an error occurs while the Auto pipe pairing operation is running, check the error code and take actions.
• If you cannot finish the Auto pipe pairing operation because of the previous reasons, set the pipe addresses manually by referring to Setting the Pipe Addresses Manually.

Things to check after completing the installation

1. Before supplying the power, use a DC 500V (AM****XV*J*) or DC 600V (AM****XV*F*) insulation resistance tester to measure the power terminal (3 phase: R, S, T) and the outdoor unit grounding.

- Measurement should be over 30MΩ.

1. Before supplying the power, use a voltmeter and phase tester to check the voltage and the phase.

- R, S, T terminal: Check the 460V (AM****XV*J*) or 230V (AM****XV*F*) between wires (R-S, S-T, T-R)

• Never measure the communication terminal since the communication circuit may get damaged.
• Check for short-circuit of the communication terminal with a general circuit tester.
• Check if the R-410A indoor units are connected.
• Check the following after the installation is completed.

Installation work	Outdoor unit	Have you checked the external surface and the inside of the outdoor unit?Is there any possibility of short-circuit caused by the heat of an outdoor unit?Is the place well-ventilated and ensures space for service?Is the outdoor unit fixed securely to withstand any external force?
	Indoor unit	Have you checked the external surface and the inside of the indoor unit?Is there enough space for service?Have you checked if the center of the indoor unit is ensured and it is installed horizontally?
Refrigerant pipe work		Have you selected correct pipes?Are the liquid and gas valve open?Is the total number of connected indoor units within the allowable range?Are the length and the height difference between the refrigerant pipes within the allowable range?Are the branch joints properly installed?Did you check the connection of liquid and gas pipes?Have you selected correct insulator for pipes and insulated them correctly?Did you insulate the pipes and connection part correctly?Is the quantity of the additional refrigerant correctly weighed in? (You must record the amount of additional refrigerant on the service record paper placed inside of the outdoor unit.)
Drain pipe work		Have you checked if the drain pipes of the indoor and outdoor unit are connected together?Have you completed the drain test?Is the drain pipe properly insulated?

Things to check after completing the installation

Electrical wiring work	Are the power cable and communication cable tightened firmly on the terminal board within the range of rated tightening torque?Have you checked for cross-connection of the power and communication cables?Have you performed the earthing work 3 to the outdoor unit?Did you make sure to use 2-core cable (not multi-core cable) for the communication cable?Is the length of the wire within allowed range?Is the wiring route correct?
Setting address	Did you set the address of the indoor and outdoor units properly?Did you set the address of the indoor and outdoor units properly? (When using multiple remote controllers)
Option	If there is a possibility of the outdoor unit from vibrating, check whether the anti-vibration frame is correctly installed.

Inspection and trial operation

Precautions before test operation

• When the outdoor temperature is low, turn on the main power 6 hours before beginning the operation.
• If you start the operation immediately after turning on the main power, it may cause serious damage to the parts within the product.
• Do not touch the refrigerant pipe during or right after the operation.
• The refrigerant pipe may be hot or cold during or right after the operation, depending on the status of the refrigerant flowing through the refrigerant pipe, compressor, and other parts of the refrigerant cycle.
• Do not operate the product with its panel or protection nets off.
• There is a risk of personal injury from rotating parts, heated parts, or high voltage.
• Do not turn off the main power immediately after stopping the operation.
• Wait for at least 5 minutes before turning off the main power. Otherwise, water leakage or other problems may occur.
• Connect all indoor units and the power supply for the outdoor unit, and run auto address setting. Run auto address setting even after changing the indoor unit PCB.

Checklist before auto trial operation:

1. Check the power cable and communication cable of the indoor and outdoor units.
2. Supply power to the outdoor unit 6 hours before trial operation to pre-heat the crank case heater.
3. Before supplying power, use a voltmeter and phase tester to check the voltage and the phase.

- R, S, T terminals: check 460V between wires (R-S, S-T, T-R) (AM****XV*J* model only) / 230V between wires (R-S, S-T, T-R) (AM****XV*F* model only).

1. When power is supplied, the outdoor unit will execute tracking to check the indoor unit connection and other optional functions.
2. Write down the installation report on the service history report paper attached on the front part of the control box.

Supply power to the outdoor unit 6 hours before auto trial operation to pre-heat the crank case heater.

1. Guaranteed range of auto trial operation

For precise judgment, you must perform auto trial operation in the following indoor/outdoor temperature conditions.

• In auto trial operation, the product will automatically select either cooling or heating mode and operate in the selected mode.
• In the temperature range marked with slashed pattern, system protection control may trigger during operation. (If the system protection control is enabled, it can be hard to get a precise judgment after the auto trial operation.)
• When the temperature is outside the guaranteed range, the accuracy of judgment on auto trial operation may decrease near the borderline area.

Inspection and trial operation

Auto trial operation

1. If the auto trial operation is not completed, normal operation will be prohibited.
2. When the auto trial operation is not completed, UP (UnPrepared) will appear on the segment after the communication check and restrict the compressor from operating. (UP Mode will be cleared automatically when auto trial mode is completed.)
3. Auto trial operation may take 20 minutes to a maximum of 2 hours depending on the operation status.
4. During auto trial operation, noise can be generated due to valve inspection. (Check the product if abnormal noise occurs continuously)
5. When an error occurs during auto trial operation, check the error code and take appropriate measures.
6. Refer to the next couple of pages when E503, E505, or E506 error occurs.
7. Refer to the service manual if you need inspection or when other errors occur.
8. When auto trial operation ends, use S-NET pro or S-CHECKER to issue a result report.
9. Refer to the service manual for further actions if you have any items with "inspection required" sign on the result report.
10. After taking appropriate measures for the items with "inspection required" sign, run the auto trial operation again.
11. Check the following items by running trial operation (cooling/heating).
12. Check if cooling/heating operation performs normally.
13. Individual indoor unit control: Check for air flow direction and fan speed.
14. Check for abnormal operation noise from the indoor and outdoor unit.
15. Check for proper draining from the indoor unit during cooling operation.
16. Use S-NET pro to check the detail operation status.
17. Explain to the user how to use the air conditioner according to the user's manual.
18. Hand over the installation manual to the customer so they can keep it with them.

• Make sure to close the top and bottom part of the outdoor unit cabinet during operation. If you operate the unit with the front cabinet open, it may cause damage to the product and you may not get the precise data from S-NET pro.

Measure to take when E503 error occurs (When "inspection required" sign is appeared on result report of S-NET pro2)

Inspection and trial operation

* Symptoms for abnormal operation of the 4-way valve

- Abnormal noise during compressor operation, increase in the suction temperature.

* Symptoms for abnormal operation of the main EEV

- It is not possible to control the superheat (SH)

- It is not possible to secure a DSH of higher than 20K

* For more information, see the troubleshooting in the service manual.

• If service valve (ball valve) check is required, the corresponding outdoor unit will display the error.
• If service valve (ball valve) check is required, auto detection mode will be terminated. Check the service valve (ball valve) of the gas pipe and liquid pipe at the same time when checking the service valve (ball valve).
• When 4-way valve and main EEV detection is needed, run heating trial operation for more than 1 hour and analyze the data to check for a problem.
• If there's frost formed in the outdoor unit or the outdoor unit is operating in defrost operation, it may be hard to detect the problem normally. In this case, perform trial operation or forced defrost operation to eliminate the frost, and then perform auto trial operation again.
• If the operation range is not within the guaranteed range, an error may occur even though the product is normal.
• To replace a component or inspect the PBA, be sure to cut off the power supply first. If inspection must be performed with the power supply on, exercise extra care to prevent electric shock.

Inspection and trial operation

* For more information, see the troubleshooting in the service manual.

• When the auto trial operation for the pressure sensor was executed before the pressure of the outdoor unit is equalized (when there's close to no difference between high and low pressure), an error may occur even though the product is normal.
• If pressure sensor check is required, error will be displayed on all installed outdoor units.
• If pressure sensor check is required, outdoor units will terminate auto trial operation mode automatically.
• To check for the pressure sensor with the problem, run trial operation for more than 1 hour and analyze the data to check for a problem.
• To replace a component or inspect the PBA, be sure to cut off the power supply first. If inspection must be performed with the power supply on, exercise extra care to prevent electric shock.

Automatic refrigerant amount detection function

This function detects amount of refrigerant in the system through refrigerant amount detection operation

* After refrigerant amount detection is finished, if you see "K9 Ed" on the display and cannot check the refrigerant amount from the S-net pro and S-checker, it means insufficient degree of supercooling.

Automatic refrigerant amount detection function

- If the temperature is out of the guaranteed range below, exact result will not be obtained.

- Indoor: 20\~32 °C (68\~89.6 °F)

- Outdoor: 5\~43 °C (41\~109.4°F)

• If the operation cycle is not stable, the operation of refrigerant amount check may be forcibly finished.
• Accuracy of the result may decrease if the product has not been operated for a long period of time or heat mode has been operated before running the function of refrigerant amount check. Therefore, use the function of refrigerant amount check after operating the product in cool mode for at least 30 minutes.
• Product may trigger system protection operation depending on the installation environment. In this case, the result of refrigerant amount check may not be accurate.

Actions to take for the check result

• Excessive amount of refrigerant

- Discharge 5% of total amount of refrigerant and restart the refrigerant amount check.

• Insufficient amount of refrigerant

- Add 5% of the total amount of refrigerant and restart the refrigerant amount check.

• Insufficient degree of supercooling

- Add 10% of the total amount of refrigerant and restart the refrigerant amount check.

• Judgment not available

- Check if the function of refrigerant amount check is executed within the guaranteed temperature range. Run trial operation to check if there are other problems on the system.

MEMO