ARXP25L5V1B - Air-conditioner DAIKIN - Free user manual and instructions

USER MANUAL ARXP25L5V1B DAIKIN

Installer reference guide

R32 split series

Line drawing of a rectangular air conditioner unit with a circular fan blade (no text or symbols)

RXP20L2V1B

RXP25L2V1B

RXP35L2V1B

ARXP20L2V1B

ARXP25L2V1B

ARXP35L2V1B

RXF20A2V1B

RXF25A2V1B

RXF35A2V1B

Installer reference guide

R32 split series

English

Table of Contents

1 General safety precautions 2

1.1 About the documentation .... 2
1.1.1 Meaning of warnings and symbols.... 2

1.2 For the installer.... 3

1.2.1 General 3

1.2.2 Installation site 3

1.2.3 Refrigerant 5

1.2.4 Brine....6

1.2.5 Water 6

1.2.6 Electrical 6

2 About the documentation 7

2.1 About this document....7

2.2 Installer reference guide at a glance 7

3 About the box 7

3.1 Overview: About the box 7

3.2 Outdoor unit....7

3.2.1 To unpack the outdoor unit 7

3.2.2 To remove the accessories from the outdoor unit..... 8

4 About the units and options 8

4.1 Overview: About the units and options....8

4.2 Identification 8

4.2.1 Identification label: Outdoor unit 8

5 Preparation 8

5.1 Overview: Preparation....8

5.2 Preparing the installation site 8

5.2.1 Installation site requirements of the outdoor unit ..... 9

5.2.2 Additional installation site requirements of the outdoor unit in cold climates 10

5.3 Preparing refrigerant piping.... 10

5.3.1 Refrigerant piping requirements.... 10

5.3.2 Refrigerant piping length and height difference ..... 10

5.3.3 Refrigerant piping insulation 10

5.4 Preparing electrical wiring 10

5.4.1 About preparing electrical wiring.... 10

6 Installation 11

6.1 Overview: Installation 11

6.2 Opening the units 11

6.2.1 About opening the units 11

6.2.2 To open the outdoor unit.... 11

6.3 Mounting the outdoor unit.... 11

6.3.1 About mounting the outdoor unit.... 11

6.3.2 Precautions when mounting the outdoor unit..... 11

6.3.3 To provide the installation structure.... 11

6.3.4 To install the outdoor unit.... 13

6.3.5 To provide drainage.... 13

6.3.6 To prevent the outdoor unit from falling over 13

6.4 Connecting the refrigerant piping 13

6.4.1 About connecting the refrigerant piping 13

6.4.2 Precautions when connecting the refrigerant piping... 13

6.4.3 Guidelines when connecting the refrigerant piping..... 14

6.4.4 Pipe bending guidelines.... 14

6.4.5 To flare the pipe end.... 14

6.4.6 Using the stop valve and service port.... 15

6.4.7 To connect the refrigerant piping to the outdoor unit .. 15

6.5 Checking the refrigerant piping 16

6.5.1 About checking the refrigerant piping 16

6.5.2 Precautions when checking the refrigerant piping ..... 16

6.5.3 To check for leaks.... 16

6.5.4 To perform vacuum drying 16

6.6 Charging refrigerant 17

6.6.1 About charging refrigerant 17

6.6.2 About the refrigerant 17

6.6.3 Precautions when charging refrigerant 17

6.6.4 To determine the additional refrigerant amount.... 17

6.6.5 To determine the complete recharge amount.... 18

6.6.6 To charge additional refrigerant 18

6.6.7 To fix the fluorinated greenhouse gases label 18

6.7 Connecting the electrical wiring.... 18

6.7.1 About connecting the electrical wiring.... 18

6.7.2 Precautions when connecting the electrical wiring ..... 18

6.7.3 Guidelines when connecting the electrical wiring ..... 18

6.7.4 Specifications of standard wiring components.... 19

6.7.5 To connect the electrical wiring on the outdoor unit..... 19

6.8 Finishing the outdoor unit installation 19

6.8.1 To finish the outdoor unit installation 19

6.8.2 To close the outdoor unit 19

7 Commissioning 19

7.1 Overview: Commissioning.... 19

7.2 Precautions when commissioning 20

7.3 Checklist before commissioning.... 20

7.4 Checklist during commissioning 20

7.5 To perform a test run.... 20

7.6 Starting up the outdoor unit 20

8 Hand-over to the user 20

9 Maintenance and service 20

9.1 Overview: Maintenance and service 21

9.2 Maintenance safety precautions.... 21

9.3 Checklist for yearly maintenance of the outdoor unit 21

10 Troubleshooting 21

10.1 Overview: Troubleshooting.... 21

10.2 Precautions when troubleshooting 21

10.3 Solving problems based on symptoms.... 21

10.3.1 Symptom: Indoor units fall, vibrate or make noise..... 21

10.3.2 Symptom: The unit is NOT heating or cooling as expected 21

10.3.3 Symptom: Water leakage 21

10.3.4 Symptom: Electrical leakage.... 21

10.3.5 Symptom: Unit does NOT function or burn damage.... 21

11 Disposal 22

11.1 Overview: Disposal 22

11.2 To pump down 22

11.3 To start and stop forced cooling 22

12 Technical data 23

12.1 Wiring diagram 23

13 Glossary 24

1 General safety precautions

1.1 About the documentation

• The original documentation is written in English. All other languages are translations.
• The precautions described in this document cover very important topics, follow them carefully.
• The installation of the system, and all activities described in the installation manual and the installer reference guide MUST be performed by an authorised installer.

1.1.1 Meaning of warnings and symbols

DANGER

Indicates a situation that results in death or serious injury.

DANGER: RISK OF ELECTROCUTION

Indicates a situation that could result in electrocution.

DANGER: RISK OF BURNING

Indicates a situation that could result in burning because of extreme hot or cold temperatures.

DANGER: RISK OF EXPLOSION

Indicates a situation that could result in explosion.

WARNING

Indicates a situation that could result in death or serious injury.

WARNING: FLAMMABLE MATERIAL

CAUTION

Indicates a situation that could result in minor or moderate injury.

NOTICE

Indicates a situation that could result in equipment or property damage.

INFORMATION

Indicates useful tips or additional information.

Symbol Explanation

Before installation, read the installation and operation manual, and the wiring instruction sheet.

Before performing maintenance and service tasks, read the service manual.

For more information, see the installer and user reference guide.

1.2 For the installer

1.2.1 General

If you are NOT sure how to install or operate the unit, contact your dealer.

NOTICE

Improper installation or attachment of equipment or accessories could result in electric shock, short-circuit, leaks, fire or other damage to the equipment. Only use accessories, optional equipment and spare parts made or approved by Daikin.

WARNING

Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation).

CAUTION

Wear adequate personal protective equipment (protective gloves, safety glasses,...) when installing, maintaining or servicing the system.

WARNING

Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them. Possible risk: suffocation.

DANGER: RISK OF BURNING

• Do NOT touch the refrigerant piping, water piping or internal parts during and immediately after operation. It could be too hot or too cold. Give it time to return to normal temperature. If you must touch it, wear protective gloves.
• Do NOT touch any accidental leaking refrigerant.

WARNING

Provide adequate measures to prevent that the unit can be used as a shelter by small animals. Small animals that make contact with electrical parts can cause malfunctions, smoke or fire.

CAUTION

Do NOT touch the air inlet or aluminium fins of the unit.

NOTICE

• Do NOT place any objects or equipment on top of the unit.
• Do NOT sit, climb or stand on the unit.

NOTICE

Works executed on the outdoor unit are best done under dry weather conditions to avoid water ingress.

In accordance with the applicable legislation, it might be necessary to provide a logbook with the product containing at least: information on maintenance, repair work, results of tests, stand-by periods,...

Also, at least, following information MUST be provided at an accessible place at the product:

• Instructions for shutting down the system in case of an emergency
• Name and address of fire department, police and hospital
• Name, address and day and night telephone numbers for obtaining service

In Europe, EN378 provides the necessary guidance for this logbook.

1.2.2 Installation site

• Provide sufficient space around the unit for servicing and air circulation.
• Make sure the installation site withstands the unit's weight and vibration.
• Make sure the area is well ventilated. Do NOT block any ventilation openings.
• Make sure the unit is level.

Do NOT install the unit in the following places:

• In potentially explosive atmospheres.
• In places where there is machinery that emits electromagnetic waves. Electromagnetic waves may disturb the control system, and cause malfunction of the equipment.
• In places where there is a risk of fire due to the leakage of flammable gases (example: thinner or gasoline), carbon fibre, ignitable dust.
• In places where corrosive gas (example: sulphurous acid gas) is produced. Corrosion of copper pipes or soldered parts may cause the refrigerant to leak.

Instructions for equipment using R32 refrigerant

If applicable.

1 General safety precautions

WARNING

• Do NOT pierce or burn.
• Do NOT use means to accelerate the defrosting process or to clean the equipment, other than those recommended by the manufacturer.
• Be aware that R32 refrigerant does NOT contain an odour.

WARNING

The appliance shall be stored so as to prevent mechanical damage and in a well-ventilated room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater) and have a room size as specified below.

NOTICE

• Do NOT re-use joints which have been used already.
• Joints made in installation between parts of refrigerant system shall be accessible for maintenance purposes.

WARNING

Make sure installation, servicing, maintenance and repair comply with instructions from Daikin and with applicable legislation (for example national gas regulation) and are executed only by authorised persons.

Installation space requirements

NOTICE

• Pipework shall be protected from physical damage.
• Installation of pipework shall be kept to a minimum.

WARNING

If appliances contain R32 refrigerant, the floor area of the room in which the appliances are installed, operated and stored MUST be larger than the minimum floor area defined in table below A (m²). This applies to:

• Indoor units without a refrigerant leakage sensor; in case of indoor units with refrigerant leakage sensor, consult the installation manual
• Outdoor units installed or stored indoors (e.g. winter garden, garage, machinery room)
• Pipework in unventilated spaces

To determine the minimum floor area

1 Determine the total refrigerant charge in the system (= factory refrigerant charge ① additional refrigerant amount charged).

Contains fluorinated greenhouse gases R32 GWP: xxx ①= kg ②= kg ① + ②= kg GWP × kg 1000 tCO₂eq

2 Determine which graph or table to use.

• For indoor units: Is the unit ceiling-mounted, wall-mounted or floor-standing?
• For outdoor units installed or stored indoors, and field piping in unventilated spaces, this depends on the installation height:

If the installation height is... Then use the graph or table for...
<1.8 m Floor-standing units

If the installation height is... Then use the graph or table for...
1.8≤x<2.2 m Wall-mounted units
≥2.2 m	Ceiling-mounted units

3 Use the graph or table to determine the minimum floor area.

A_(m^2)

Ceiling-mounted unit(a)	Wall-mounted unit(b)	Floor-standing unit(c)
m (kg) — A _min (m2)	m (kg) — A _min (m2)	m (kg) — A _min (m2)
<1.224———	<1.224———	<1.224———
1.2250-956	1.2251-43	1.22512.9
1.41-25	1.41-87	1.416.8
1.61-63	1.62-44	1.622.0
1.82-07	1.83-09	1.827.8
2.02-55	2.03-81	2.034.3
2.23-09	2.24-61	2.241.5
2.43-68	2.45-49	2.449.4
2.64-31	2.66-44	2.658.0
2.85-00	2.87-47	2.867.3
3.05-74	3.08-58	3.077.2
3.26-54	3.29-76	3.287.9
3.47-38	3.411.0	3.499.2
3.68-27	3.612.4	3.6111
3.89-22	3.813.8	3.8124
4.010.2	4.015.3	4.0137
4.211.3	4.216.8	4.2151
4.412.4	4.418.5	4.4166
4.613.5	4.620.2	4.6182
4.814.7	4.822.0	4.8198
5.016.0	5.023.8	5.0215
5.217.3	5.225.8	5.2232
5.418.6	5.427.8	5.4250
5.620.0	5.629.9	5.6269
5.821.5	5.832.1	5.8289
6.023.0	6.034.3	6.0309
6.224.5	6.236.6	6.2330
6.426.1	6.439.1	6.4351
6.627.8	6.641.5	6.6374
6.829.5	6.844.1	6.8397
7.031.3	7.046.7	7.0420
7.233.1	7.249.4	7.2445
7.434.9	7.452.2	7.4470
7.636.9	7.655.1	7.6496
7.838.8	7.858.0	7.8522
7.95640.8	7.95661.0	7.956549

m Total refrigerant charge in the system
A_min Minimum floor area
(a) Ceiling-mounted unit (= Ceiling-mounted unit)
(b) Wall-mounted unit (= Wall-mounted unit)
(c) Floor-standing unit (= Floor-standing unit)

1.2.3 Refrigerant

If applicable. See the installation manual or installer reference guide of your application for more information.

NOTICE

Make sure refrigerant piping installation complies with applicable legislation. In Europe, EN378 is the applicable standard.

NOTICE

Make sure the field piping and connections are NOT subjected to stress.

WARNING

During tests, NEVER pressurize the product with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit).

WARNING

Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks, ventilate the area immediately. Possible risks:

• Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency.
• Toxic gas may be produced if refrigerant gas comes into contact with fire.

DANGER: RISK OF EXPLOSION

Pump down – Refrigerant leakage. If you want to pump down the system, and there is a leakage in the refrigerant circuit:

• Do NOT use the unit's automatic pump down function, with which you can collect all refrigerant from the system into the outdoor unit. Possible consequence: Self-combustion and explosion of the compressor because of air going into the operating compressor.
• Use a separate recovery system so that the unit's compressor does NOT have to operate.

WARNING

ALWAYS recover the refrigerant. Do NOT release them directly into the environment. Use a vacuum pump to evacuate the installation.

NOTICE

After all the piping has been connected, make sure there is no gas leak. Use nitrogen to perform a gas leak detection.

NOTICE

• To avoid compressor breakdown, do NOT charge more than the specified amount of refrigerant.
• When the refrigerant system is to be opened, refrigerant MUST be treated according to the applicable legislation.

WARNING

Make sure there is no oxygen in the system. Refrigerant may only be charged after performing the leak test and the vacuum drying.

• In case re-charge is required, refer to the nameplate of the unit. It states the type of refrigerant and necessary amount.
• The unit is factory charged with refrigerant and depending on pipe sizes and pipe lengths some systems require additional charging of refrigerant.
• Only use tools exclusively for the refrigerant type used in the system, this to ensure pressure resistance and prevent foreign materials from entering into the system.
• Charge the liquid refrigerant as follows:

If	Then
A siphon tube is present (i.e., the cylinder is marked with "Liquid filling siphon attached")	Charge with the cylinder upright.
A siphon tube is NOT present	Charge with the cylinder upside down.

• Open refrigerant cylinders slowly.
• Charge the refrigerant in liquid form. Adding it in gas form may prevent normal operation.

1 General safety precautions

CAUTION

When the refrigerant charging procedure is done or when pausing, close the valve of the refrigerant tank immediately. If the valve is NOT closed immediately, remaining pressure might charge additional refrigerant. Possible consequence: Incorrect refrigerant amount.

1.2.4 Brine

If applicable. See the installation manual or installer reference guide of your application for more information.

WARNING

The selection of the brine MUST be in accordance with the applicable legislation.

WARNING

Take sufficient precautions in case of brine leakage. If brine leaks, ventilate the area immediately and contact your local dealer.

WARNING

The ambient temperature inside the unit can get much higher than that of the room, e.g. 70°C. In case of a brine leak, hot parts inside the unit can create a hazardous situation.

WARNING

The use and installation of the application MUST comply with the safety and environmental precautions specified in the applicable legislation.

1.2.5 Water

If applicable. See the installation manual or installer reference guide of your application for more information.

NOTICE

Make sure water quality complies with EU directive 98/83 EC.

1.2.6 Electrical

DANGER: RISK OF ELECTROCUTION

• Turn OFF all power supply before removing the switch box cover, connecting electrical wiring or touching electrical parts.
• Disconnect the power supply for more than 1 minute, and measure the voltage at the terminals of main circuit capacitors or electrical components before servicing. The voltage MUST be less than 50 V DC before you can touch electrical components. For the location of the terminals, see the wiring diagram.
• Do NOT touch electrical components with wet hands.
• Do NOT leave the unit unattended when the service cover is removed.

WARNING

If NOT factory installed, a main switch or other means for disconnection, having a contact separation in all poles providing full disconnection under overvoltage category III condition, MUST be installed in the fixed wiring.

WARNING

• ONLY use copper wires.
• Make sure the field wiring complies with the applicable legislation.
• All field wiring MUST be performed in accordance with the wiring diagram supplied with the product.
• NEVER squeeze bundled cables and make sure they do NOT come in contact with the piping and sharp edges. Make sure no external pressure is applied to the terminal connections.
• Make sure to install earth wiring. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth. Incomplete earth may cause electrical shock.
• Make sure to use a dedicated power circuit. NEVER use a power supply shared by another appliance.
• Make sure to install the required fuses or circuit breakers.
• Make sure to install an earth leakage protector. Failure to do so may cause electric shock or fire.
• When installing the earth leakage protector, make sure it is compatible with the inverter (resistant to high frequency electric noise) to avoid unnecessary opening of the earth leakage protector.

NOTICE

Precautions when laying power wiring:

• Do NOT connect wiring of different thicknesses to the power terminal block (slack in the power wiring may cause abnormal heat).
• When connecting wiring which is the same thickness, do as shown in the figure above.
• For wiring, use the designated power wire and connect firmly, then secure to prevent outside pressure being exerted on the terminal board.
• Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head will damage the head and make proper tightening impossible.
• Over-tightening the terminal screws may break them.

WARNING

• After finishing the electrical work, confirm that each electrical component and terminal inside the electrical components box is connected securely.
• Make sure all covers are closed before starting up the unit.

NOTICE

Only applicable if the power supply is three-phase, and the compressor has an ON/OFF starting method.

If there exists the possibility of reversed phase after a momentary black out and the power goes on and off while the product is operating, attach a reversed phase protection circuit locally. Running the product in reversed phase can break the compressor and other parts.

2 About the documentation

2.1 About this document

INFORMATION

Make sure that the user has the printed documentation and ask him/her to keep it for future reference.

Target audience

Authorised installers

Documentation set

This document is part of a documentation set. The complete set consists of:

- General safety precautions:

• Safety instructions that you MUST read before installing
• Format: Paper (in the box of the outdoor unit)

- Outdoor unit installation manual:

• Installation instructions
• Format: Paper (in the box of the outdoor unit)

- Installer reference guide:

• Preparation of the installation, reference data,...
• Format: Digital files on http://www.daikineurope.com/support-and-manuals/product-information/

Latest revisions of the supplied documentation may be available on the regional Daikin website or via your dealer.

The original documentation is written in English. All other languages are translations.

Technical engineering data

• A subset of the latest technical data is available on the regional Daikin website (publicly accessible).
• The full set of latest technical data is available on the Daikin extranet (authentication required).

2.2 Installer reference guide at a glance

Chapter Description
General safety precautions	Safety instructions that you MUST read before installing
About the documentation W	What documentation exists for the installer
About the box How to unpack	ck the units and remove their accessories
About the units and options	• How to identify the units• Possible combinations of units and options
Preparation What to do and	know before going on-site
Installation What to do and	know to install the system
Commissioning What to do	and know to commission the system after it is configured
Hand-over to the user What	to give and explain to the user
Maintenance and service H	How to maintain and service the units
Troubleshooting	What to do in case of problems
Disposal	How to dispose of the system
Technical data	Specifications of the system
Glossary	Definition of terms

3 About the box

3.1 Overview: About the box

This chapter describes what you have to do after the box with the outdoor unit is delivered on-site.

It contains information about:

• Unpacking and handling the units
• Removing the accessories from the units

Keep the following in mind:

- At delivery, the unit MUST be checked for damage. Any damage MUST be reported immediately to the carrier's claims agent.

- Bring the packed unit as close as possible to its final installation position to prevent damage during transport.

- When handling the unit, take into account the following:

Fragile, handle the unit with care.

Keep the unit upright in order to avoid damage.

- Prepare the path along which you want to bring the unit inside in advance.

3.2 Outdoor unit

3.2.1 To unpack the outdoor unit

Isometric illustration of a cardboard box with visible shipping containers and mounting features (no text or symbols)

4 About the units and options

Technical diagram showing two views of a mechanical or electrical component with labeled parts 1 and 2, likely illustrating a structural or mechanical assembly.

3.2.2 To remove the accessories from the outdoor unit

1 Lift the outdoor unit.

CAUTION

Only handle the outdoor unit as follows:

Diagram illustrating a hand operating a device with labeled icons for gloves and human figures, showing structural change.

2 Remove the accessories at the bottom of the package.

a 1x1x1x1x becd 1x

a General safety precautions
b Outdoor unit installation manual
c Fluorinated greenhouse gases label
d Multilingual fluorinated greenhouse gases label
e Drain plug (located on the bottom of the packing case)

4 About the units and options

4.1 Overview: About the units and options

This chapter contains information about:

- Identification of the outdoor unit

4.2 Identification

NOTICE

When installing or servicing several units at the same time, make sure NOT to switch the service panels between different models.

4.2.1 Identification label: Outdoor unit

Location

Technical line drawing of a mechanical device with a black arrow pointing to a component (no text or symbols present)

5 Preparation

5.1 Overview: Preparation

This chapter describes what you have to do and know before going on-site.

It contains information about:

• Preparing the installation site
  • Preparing the refrigerant piping
• Preparing the electrical wiring

5.2 Preparing the installation site

Do NOT install the unit in places often used as work place. In case of construction works (e.g. grinding works) where a lot of dust is created, the unit MUST be covered.

Choose an installation location with sufficient space for carrying the unit in and out of the site.

CAUTION

• Check if the installation location can support the unit's weight. Poor installation is hazardous. It can also cause vibrations or unusual operating noise.
• Provide sufficient service space.

• Do NOT install the unit so that it is in contact with a ceiling or a wall, as this may cause vibrations.

• Choose the installation location with sufficient place for carrying the unit in and out of the site.

• Choose a location where the hot/cold air discharged from the unit or the operation noise, will NOT disturb anyone.
• Provide sufficient space around the unit for servicing and air circulation.
• Avoid areas where flammable gas or product might leak.

Install power cables at least 1 metre away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 3 metres may NOT be sufficient.

WARNING

Do NOT place objects below the indoor and/or outdoor unit that may get wet. In this condition, condensation on the main unit or refrigerant pipes, air filter dirt or drain blockage may cause dripping. This results in fouling or failure of the object which is located beneath the unit.

WARNING

The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater).

5.2.1 Installation site requirements of the outdoor unit

INFORMATION

Also read the following requirements:

• General installation site requirements. See the "General safety precautions" chapter.
• Refrigerant piping requirements (length, height difference). See further in this "Preparation" chapter.

Mind the following spacing guidelines:

≤1200 b a >150 >300

a Air outlet b Air inlet

b >150 a >50 >300

(mm)(mm)

NOTICE

• Do NOT stack the units on each other.
• Do NOT hang the unit on a ceiling.

Strong winds ( ≥ 18 km/h) blowing against the outdoor unit's air outlet causes short circuit (suction of discharge air). This may result in:

• deterioration of the operational capacity;
• frequent frost acceleration in heating operation;
• disruption of operation due to decrease of low pressure or increase of high pressure;

- a broken fan (if a strong wind blows continuously on the fan, it may start rotating very fast, until it breaks).

It is recommended to install a baffle plate when the air outlet is exposed to wind.

It is recommended to install the outdoor unit with the air inlet facing the wall and NOT directly exposed to the wind.

Diagram showing airflow or ventilation system inside a brick wall, labeled with points a, b, and c.

a Baffle plate
b Prevailing wind direction
c Air outlet

Do NOT install the unit in the following places:

- Sound sensitive areas (e.g. near a bedroom), so that the operation noise will cause no trouble. Note: If the sound is measured under actual installation conditions, the measured value might be higher than the sound pressure level mentioned in Sound spectrum in the data book due to environmental noise and sound reflections.

INFORMATION

The sound pressure level is less than 70 dBA.

• In places where a mineral oil mist, spray or vapour may be present in the atmosphere. Plastic parts may deteriorate and fall off or cause water leakage.
  It is NOT recommended to install the unit in the following places because it may shorten the life of the unit:
• Where the voltage fluctuates a lot
• In vehicles or vessels
• Where acidic or alkaline vapour is present

Seaside installation. Make sure the outdoor unit is NOT directly exposed to sea winds. This is to prevent corrosion caused by high levels of salt in the air, which might shorten the life of the unit.

Install the outdoor unit away from direct sea winds.

Example: Behind the building.

a b c

5 Preparation

If the outdoor unit is exposed to direct sea winds, install a windbreaker.

• Height of windbreaker≥1.5×height of outdoor unit
• Mind the service space requirements when installing the windbreaker.

a d c d c b

a Sea wind
b Building
c Outdoor unit
d Windbreaker

The outdoor unit is designed for outdoor installation only, and for ambient temperatures ranging from -10 to 46°C in cooling mode and from -15 to 24°C in heating mode.

5.2.2 Additional installation site requirements of the outdoor unit in cold climates

Protect the outdoor unit against direct snowfall and take care that the outdoor unit is NEVER snowed up.

Diagram of a brick wall structure with labeled components and airflow direction arrows

a Snow cover or shed
b Pedestal
c Prevailing wind direction
d Air outlet

In any case, provide at least 300 mm of free space below the unit. Additionally, make sure the unit is positioned at least 100 mm above the maximum expected level of snow. See "6.3 Mounting the outdoor unit" on page 11 for more details.

In heavy snowfall areas it is very important to select an installation site where the snow will NOT affect the unit. If lateral snowfall is possible, make sure that the heat exchanger coil is NOT affected by the snow. If necessary, install a snow cover or shed and a pedestal.

5.3 Preparing refrigerant piping

5.3.1 Refrigerant piping requirements

INFORMATION

Also read the precautions and requirements in the "General safety precautions" chapter.

• Piping material: Phosphoric acid deoxidised seamless copper.
• Piping diameter:

Liquid piping ∅6.4 mm (1/4")
Gas piping ∅9.5 mm (3/8")

- Piping temper grade and thickness:

Outer diameter(∅)	Temper grade Thickness (t) (a)
6.4 mm (1/4") Annealed (O) ≥0.8	mm
9.5 mm (3/8") Annealed (O)

(a) Depending on the applicable legislation and the unit's maximum working pressure (see "PS High" on the unit name plate), larger piping thickness might be required.

5.3.2 Refrigerant piping length and height difference

What?	Distance
Maximum allowable pipe length	15 m
Minimum allowable pipe length	1.5 m
Maximum allowable height distance	12 m

5.3.3 Refrigerant piping insulation

- Use polyethylene foam as insulation material:

• with a heat transfer rate between 0.041 and 0.052 W/mK (0.035 and 0.045 kcal/mh°C)
• with a heat resistance of at least 120^

- Insulation thickness

Pipe outer diameter (_p)	Insulation inner diameter (_i)	Insulation thickness(t)
6.4 mm (1/4")	8~10 mm	≥10 mm
9.5 mm (3/8")	12~15 mm

If the temperature is higher than 30^ C and the humidity is higher than RH 80%, the thickness of the insulation materials should be at least 20 mm to prevent condensation on the surface of the insulation.

5.4 Preparing electrical wiring

5.4.1 About preparing electrical wiring

INFORMATION

Also read the precautions and requirements in the "General safety precautions" chapter.

INFORMATION

Also read "6.7.4 Specifications of standard wiring components" on page 19.

WARNING

• If the power supply has a missing or wrong N-phase, equipment might break down.
• Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth. Incomplete earthing may cause electrical shock.
• Install the required fuses or circuit breakers.
• Secure the electrical wiring with cable ties so that the cables do NOT come in contact with sharp edges or piping, particularly on the high-pressure side.
• Do NOT use taped wires, stranded conductor wires, extension cords, or connections from a star system. They can cause overheating, electrical shock or fire.
• Do NOT install a phase advancing capacitor, because this unit is equipped with an inverter. A phase advancing capacitor will reduce performance and may cause accidents.

WARNING

• All wiring MUST be performed by an authorised electrician and MUST comply with the applicable legislation.
• Make electrical connections to the fixed wiring.
• All components procured on the site and all electrical construction MUST comply with the applicable legislation.

WARNING

The backup heater MUST have a dedicated power supply and MUST be protected by the safety devices required by the applicable legislation.

WARNING

ALWAYS use multicore cable for power supply cables.

6 Installation

6.1 Overview: Installation

This chapter describes what you have to do and know on-site to install the system.

Typical workflow

Installation typically consists of the following stages:

1 Opening the units
2 Mounting the outdoor unit
3 Connecting the refrigerant piping
4 Checking the refrigerant piping
5 Charging refrigerant
6 Connecting the electrical wiring
7 Finishing the outdoor unit installation

6.2 Opening the units

6.2.1 About opening the units

At certain times, you have to open the unit. Example:

• When connecting the refrigerant piping
• When connecting the electrical wiring
• When maintaining or servicing the unit

DANGER: RISK OF ELECTROCUTION

Do NOT leave the unit unattended when the service cover is removed.

6.2.2 To open the outdoor unit

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING

Technical diagram of an air conditioner unit with labeled components and directional indicators

6.3 Mounting the outdoor unit

6.3.1 About mounting the outdoor unit

When

The outdoor and indoor unit must be mounted before the refrigerant piping can be connected.

Typical workflow

Mounting the outdoor unit typically consists of the following stages:

1 Providing the installation structure.
2 Installing the outdoor unit.
3 Providing drainage.
4 Preventing the unit from falling over.
5 Protecting the unit against snow and wind by installing a snow cover and baffle plates. See "Preparing installation site" in "5 Preparation" on page 8.

6.3.2 Precautions when mounting the outdoor unit

INFORMATION

Also read the precautions and requirements in the following chapters:

• General safety precautions
• Preparation

6.3.3 To provide the installation structure

Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise.

Fix the unit securely by means of foundation bolts in accordance with the foundation drawing.

Prepare 4 sets of M8 or M10 anchor bolts, nuts and washers (field supply).

(mm)

In any case, provide at least 300 mm of free space below the unit. Additionally, make sure the unit is positioned at least 100 mm above the maximum expected level of snow. In this case, it is recommended to construct a pedestal.

a Maximum snowfall height 300 500 192 470 192 (mm) a

If the unit is installed on brackets to the wall, install the unit as follows:

a Maximum snowfall height (mm) ≥100 ≥300

Isometric illustration of a heat exchanger mounted on a brick wall (no text or symbols)

6.3.4 To install the outdoor unit

4×M8/M10

6.3.5 To provide drainage

NOTICE

If the unit is installed in a cold climate, take adequate measures so that the evacuated condensate CANNOT freeze.

INFORMATION

For information on the available options, contact your dealer.

NOTICE

Provide at least 300 mm of free space below the unit. Additionally, make sure the unit is positioned at least 100 mm above the expected level of snow.

1 Use a drain plug for drainage.
2 Use a ∅16 mm hose (field supply).

Pure diagram of a mechanical or electrical component with no text, numbers, or symbols

a Drain port
b Bottom frame
c Drain plug
d Hose (field supply)

• Make sure that condensation water can be evacuated properly.
• Install the unit on a base to make sure that there is proper drainage in order to avoid ice accumulation.
• Prepare a water drainage channel around the foundation to drain waste water away from the unit.
• Avoid drain water flowing over the footpath, so that it does NOT become slippery in case of ambient freezing temperatures.
• If you install the unit on a frame, install a waterproof plate within 150 mm of the bottom side of the unit in order to prevent water from getting into the unit and to avoid drain water dripping (see the following figure).

6.3.6 To prevent the outdoor unit from falling over

In case the unit is installed in places where strong wind can tilt the unit, take following measure:

1 Prepare 2 cables as indicated in the following illustration (field supply).
2 Place the 2 cables over the outdoor unit.
3 Insert a rubber sheet between the cables and the outdoor unit to prevent the cable from scratching the paint (field supply).
4 Attach the cable's ends. Tighten those ends.

Isometric illustration of a heat exchanger or cooling unit with attached sensors and mounting base (no text or symbols)

6.4 Connecting the refrigerant piping

6.4.1 About connecting the refrigerant piping

Before connecting the refrigerant piping

Make sure the outdoor and indoor unit are mounted.

Typical workflow

Connecting the refrigerant piping involves:

• Connecting the refrigerant piping to the indoor unit
• Connecting the refrigerant piping to the outdoor unit
• Insulating the refrigerant piping
• Keeping in mind the guidelines for:
• Pipe bending
• Flaring pipe ends
• Using the stop valves

6.4.2 Precautions when connecting the refrigerant piping

INFORMATION

Also read the precautions and requirements in the following chapters:

• General safety precautions
• Preparation

DANGER: RISK OF BURNING

6 Installation

CAUTION

• Do NOT use mineral oil on flared part.
• Do NOT reuse piping from previous installations.
• NEVER install a drier to this R32 unit to guarantee its lifetime. The drying material may dissolve and damage the system.

CAUTION

• Use the flare nut fixed to the main unit.
• To prevent gas leakage, apply refrigeration oil only to the inside of the flare. Use refrigeration oil for R32.
• Do NOT reuse joints.

NOTICE

Take the following precautions on refrigerant piping into account:

• Avoid anything but the designated refrigerant to get mixed into the refrigerant cycle (e.g. air).
• Only use R32 when adding refrigerant.
• Only use installation tools (e.g. manifold gauge set) that are exclusively used for R32 installations to withstand the pressure and to prevent foreign materials (e.g. mineral oils and moisture) from mixing into the system.
• Install the piping so that the flare is NOT subjected to mechanical stress.
• Protect the piping as described in the following table to prevent dirt, liquid or dust from entering the piping.
• Use caution when passing copper tubes through walls (see figure below).

Diagram showing four different types of welding tools or welding joints with cross symbols indicating no welding or disassembling.

Unit Installation period Protection method
Outdoor unit >1 month	Pinch the pipe
	<1 month Pinch or tape the pipe
Indoor unit Regardless of the period

INFORMATION

Do NOT open the refrigerant stop valve before checking the refrigerant piping. When you need to charge additional refrigerant it is recommended to open the refrigerant stop valve after charging.

WARNING

Connect the refrigerant piping securely before running the compressor. If the refrigerant piping is NOT connected and the stop valve is open when the compressor is run, air will be sucked in. This will cause abnormal pressure in the refrigeration cycle, which may result in equipment damage and even injury.

6.4.3 Guidelines when connecting the refrigerant piping

Take the following guidelines into account when connecting pipes:

- Coat the flare inner surface with ether oil or ester oil when connecting a flare nut. Tighten 3 or 4 turns by hand, before tightening firmly.

• ALWAYS use 2 wrenches together when loosening a flare nut.
• ALWAYS use a spanner and torque wrench together to tighten the flare nut when connecting the piping. This to prevent nut cracking and leaks.

a Torque wrench

b Spanner

c Piping union

d Flare nut

Piping size (mm)	Tightening torque (N·m)	Flare dimensions (A) (mm)	Flare shape (mm)
∅6.4	15~17	8.7~9.1
∅9.5	33~39	12.8~13.2

6.4.4 Pipe bending guidelines

Use a pipe bender for bending. All pipe bends should be as gentle as possible (bending radius should be 30\~40 mm or larger).

6.4.5 To flare the pipe end

CAUTION

• Incomplete flaring may cause refrigerant gas leakage.
• Do NOT re-use flares. Use new flares to prevent refrigerant gas leakage.
• Use flare nuts that are included with the unit. Using different flare nuts may cause refrigerant gas leakage.

1 Cut the pipe end with a pipe cutter.
2 Remove burrs with the cut surface facing down so that the chips do NOT enter the pipe.

a Cut exactly at right angles.

b Remove burrs.

3 Remove the flare nut from the stop valve and put the flare nut on the pipe.
4 Flare the pipe. Set exactly at the position as shown in the following figure.

	Flare tool for R32(clutch type)	Conventional flare tool
		Clutch type(Ridgid-type)	Wing nut type(Imperial-type)
A	0~0.5 mm 1.0~1.5 mm	1.5~2.0 mm

5 Check that the flaring is properly made.

a Flare's inner surface MUST be flawless.
b The pipe end MUST be evenly flared in a perfect circle.
c Make sure the flare nut is fitted.

6.4.6 Using the stop valve and service port

CAUTION

Do NOT open the valves before flaring is complete. This would cause refrigerant gas leakage.

To handle the stop valve

Take the following guidelines into account:

• The stop valves are factory closed.
• The following figure shows the stop valve parts required when handling the valve.

a Service port and service port cap
b Valve stem
c Field piping connection
d Stem cap

• Keep both stop valves open during operation.
• Do NOT apply excessive force to the valve stem. Doing so may break the valve body.
• ALWAYS make sure to secure the stop valve with a spanner, then loosen or tighten the flare nut with a torque wrench. Do NOT place the spanner on the stem cap, as this could cause a refrigerant leak.

Technical diagram showing two mechanical assembly states labeled a and b, with cross-sectional views of the components.

a Spanner
b Torque wrench

- When it is expected that the operating pressure will be low (e.g. when cooling will be performed while the outside air temperature is low), sufficiently seal the flare nut in the stop valve on the gas line with silicon sealant to prevent freezing.

Silicon sealant; make sure there is no gap.

To open/close the stop valve

1 Remove the stop valve cover.
2 Insert a hexagonal wrench (liquid side: 4 mm, gas side: 4 mm) into the valve stem and turn the valve stem:

Counterclockwise to open. Clockwise to close.

3 When the stop valve CANNOT be turned any further, stop turning. The valve is now open/closed.

To handle the stem cap

- The stem cap is sealed where indicated with the arrow. Do NOT damage it.

- After handling the stop valve, tighten the stem cap, and check for refrigerant leaks.

Item Tightening torque (N·m)
Stem cap, liquid side 21.6~27.4
Stem cap, gas side 21.6~27.4

To handle the service cap

• ALWAYS use a charge hose equipped with a valve depressor pin, since the service port is a Schrader type valve.
• After handling the service port, tighten the service port cap, and check for refrigerant leaks.

Item Tightening torque (N·m)
Service port cap 10.8~14.7

6.4.7 To connect the refrigerant piping to the outdoor unit

• Piping length. Keep field piping as short as possible.
• Piping protection. Protect the field piping against physical damage.

1 Connect the liquid refrigerant connection from the indoor unit to the liquid stop valve of the outdoor unit.

a Liquid stop valve
b Gas stop valve
c Service port

2 Connect the gas refrigerant connection from the indoor unit to the gas stop valve of the outdoor unit.

NOTICE

It is recommended that the refrigerant piping between indoor and outdoor unit is installed in a ducting or the refrigerant piping is wrapped with finishing tape.

6 Installation

6.5 Checking the refrigerant piping

6.5.1 About checking the refrigerant piping

The outdoor unit's internal refrigerant piping has been factory tested for leaks. You only have to check the outdoor unit's external refrigerant piping.

Before checking the refrigerant piping

Make sure the refrigerant piping is connected between the outdoor unit and the indoor unit.

Typical workflow

Checking the refrigerant piping typically consists of the following stages:

1 Checking for leaks in the refrigerant piping.

2 Performing vacuum drying to remove all moisture, air or nitrogen from the refrigerant piping.

If there is a possibility of moisture being present in the refrigerant piping (for example, water may have entered the piping), first carry out the vacuum drying procedure below until all moisture has been removed.

6.5.2 Precautions when checking the refrigerant piping

INFORMATION

Also read the precautions and requirements in the following chapters:

- General safety precautions

- Preparation

NOTICE

Use a 2-stage vacuum pump with a non-return valve that can evacuate to a gauge pressure of -100.7 kPa (-1.007 bar)(5 Torr absolute). Make sure the pump oil does not flow oppositely into the system while the pump is not working.

NOTICE

Use this vacuum pump for R32 exclusively. Using the same pump for other refrigerants may damage the pump and the unit.

NOTICE

- Connect the vacuum pump to the service port of the gas stop valve.

- Make sure that the gas stop valve and liquid stop valve are firmly closed before performing the leak test or vacuum drying.

6.5.3 To check for leaks

NOTICE

Do NOT exceed the unit's maximum working pressure (see "PS High" on the unit name plate).

NOTICE

Make sure to use a recommended bubble test solution from your wholesaler. Do not use soap water, which may cause cracking of flare nuts (soap water may contain salt, which absorbs moisture that will freeze when the piping gets cold), and/or lead to corrosion of flared joints (soap water may contain ammonia which causes a corrosive effect between the brass flare nut and the copper flare).

1 Charge the system with nitrogen gas up to a gauge pressure of at least 200 kPa (2 bar). It is recommended to pressurize to 3000 kPa (30 bar) in order to detect small leaks.
2 Check for leaks by applying the bubble test solution to all connections.
3 Discharge all nitrogen gas.

6.5.4 To perform vacuum drying

a b c d e f f g h k i j h

a Compound pressure gauge
b Gauge manifold
c Pressure meter
d Low-pressure valve (Lo)
e High-pressure valve (Hi)
f Charging hoses
g Vacuum pump
h Valve caps
I Service port
j Gas stop valve
k Liquid stop valve

1 Vacuum the system until the pressure on the manifold indicates -0.1 MPa (-1 bar).

2 Leave as is for 4-5 minutes and check the pressure:

If the pressure...	Then...
Does not change	There is no moisture in the system. This procedure is finished.
Increases	There is moisture in the system. Go to the next step.

3 Vacuum the system for at least 2 hours to a manifold pressure of -0.1 MPa (-1 bar).
4 After turning the pump OFF, check the pressure for at least 1 hour.
5 If you do NOT reach the target vacuum or CANNOT maintain the vacuum for 1 hour, do the following:

• Check for leaks again.
• Perform vacuum drying again.

NOTICE

Make sure to open the stop valves after installing the refrigerant piping and performing vacuum drying. Running the system with the stop valves closed may break the compressor.

INFORMATION

After opening the stop valve, it is possible that the pressure in the refrigerant piping does NOT increase. This might be caused by e.g. the closed state of the expansion valve in the outdoor unit circuit, but does NOT present any problem for correct operation of the unit.

6.6 Charging refrigerant

6.6.1 About charging refrigerant

The outdoor unit is factory charged with refrigerant, but in some cases the following might be necessary:

What When
Charging additional refrigerant When the total liquid piping length is more than specified (see later).
Completely recharging refrigerant Example: ·When relocating the system. ·After a leak.

Charging additional refrigerant

Before charging additional refrigerant, make sure the outdoor unit's external refrigerant piping is checked (leak test, vacuum drying).

INFORMATION

Depending on the units and/or the installation conditions, it might be necessary to connect electrical wiring before you can charge refrigerant.

Typical workflow – Charging additional refrigerant typically consists of the following stages:

1 Determining if and how much you have to charge additionally.
2 If necessary, charging additional refrigerant.
3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of the outdoor unit.

Completely recharging refrigerant

Before completely recharging refrigerant, make sure the following is done:

1 All refrigerant is recovered from the system.
2 The outdoor unit's external refrigerant piping is checked (leak test, vacuum drying).
3 Vacuum drying on the outdoor unit's internal refrigerant piping is performed.

NOTICE

Before completely recharging, perform vacuum drying on the outdoor unit's internal refrigerant piping as well.

Typical workflow – Completely recharging refrigerant typically consists of the following stages:

1 Determining how much refrigerant to charge.
2 Charging refrigerant.
3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of the outdoor unit.

6.6.2 About the refrigerant

This product contains fluorinated greenhouse gases. Do NOT vent gases into the atmosphere.

Refrigerant type: R32

Global warming potential (GWP) value: 675

NOTICE

In Europe, the greenhouse gas emissions of the total refrigerant charge in the system (expressed as tonnes CO_2 -equivalent) is used to determine the maintenance intervals. Follow the applicable legislation.

Formula to calculate the greenhouse gas emissions: GWP value of the refrigerant × Total refrigerant charge [in kg] / 1000

Please contact your installer for more information.

WARNING: FLAMMABLE MATERIAL

The refrigerant inside this unit is mildly flammable.

WARNING

The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater).

WARNING

• Do NOT pierce or burn refrigerant cycle parts.
• Do NOT use cleaning materials or means to accelerate the defrosting process other than those recommended by the manufacturer.
• Be aware that the refrigerant inside the system is odourless.

WARNING

The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the refrigerant leaks in the room and comes in contact with fire from a burner, a heater, or a cooker, this may result in fire, or the formation of a harmful gas.

Turn off any combustible heating devices, ventilate the room, and contact the dealer where you purchased the unit.

Do NOT use the unit until a service person confirms that the part from which the refrigerant leaked has been repaired.

6.6.3 Precautions when charging refrigerant

INFORMATION

Also read the precautions and requirements in the following chapters:

• General safety precautions
• Preparation

6.6.4 To determine the additional refrigerant amount

If the total liquid piping length is...	Then...
≤10 m	Do NOT add additional refrigerant.
>10 m	R=(total length (m) of liquid piping-10 m)×0.020R=Additional charge (kg)(rounded in units of 0.1 kg)

INFORMATION

Piping length is the one way length of liquid piping.

6.6.5 To determine the complete recharge amount

INFORMATION

If a complete recharge is necessary, the total refrigerant charge is: the factory refrigerant charge (see unit name plate) + the determined additional amount.

6.6.6 To charge additional refrigerant

WARNING

• Only use R32 as refrigerant. Other substances may cause explosions and accidents.
• R32 contains fluorinated greenhouse gases. Its global warming potential (GWP) value is 675. Do NOT vent these gases into the atmosphere.
• When charging refrigerant, ALWAYS use protective gloves and safety glasses.

CAUTION

To avoid compressor breakdown, do NOT charge more than the specified amount of refrigerant.

Prerequisite: Before charging refrigerant, make sure the refrigerant piping is connected and checked (leak test and vacuum drying).

1 Connect the refrigerant cylinder to both the service port of the gas stop valve and the service port of the liquid stop valve.
2 Charge the additional refrigerant amount.
3 Open the stop valves.

If pump down is needed in case of dismantling or relocating the system, see "11.2 To pump down" on page 22 for more details.

6.6.7 To fix the fluorinated greenhouse gases label

1 Fill in the label as follows:

Contains fluorinated greenhouse gases RXXX GWP: XXX ①= kg ②= kg ① + ②= kg GWP × kg 1000 tCO₂eq a b c d e

a If a multilingual fluorinated greenhouse gases label is delivered with the unit (see accessories), peel off the applicable language and stick it on top of a.
b Factory refrigerant charge: see unit name plate
c Additional refrigerant amount charged
d Total refrigerant charge
e Greenhouse gas emissions of the total refrigerant charge expressed as tonnes CO₂-equivalent
f GWP = Global warming potential

NOTICE

In Europe, the greenhouse gas emissions of the total refrigerant charge in the system (expressed as tonnes CO_2 -equivalent) is used to determine the maintenance intervals. Follow the applicable legislation.

Formula to calculate the greenhouse gas emissions: GWP value of the refrigerant × Total refrigerant charge [in kg] / 1000

2 Fix the label on the inside of the outdoor unit near the gas and liquid stop valves.

6.7 Connecting the electrical wiring

6.7.1 About connecting the electrical wiring

Typical workflow

Connecting the electrical wiring typically consists of the following stages:

1 Making sure the power supply system complies with the electrical specifications of the units.
2 Connecting the electrical wiring to the outdoor unit.
3 Connecting the electrical wiring to the indoor unit.
4 Connecting the main power supply.

6.7.2 Precautions when connecting the electrical wiring

INFORMATION

Also read the precautions and requirements in the following chapters:

• General safety precautions
• Preparation

DANGER: RISK OF ELECTROCUTION

WARNING

ALWAYS use multicore cable for power supply cables.

WARNING

If the supply cord is damaged, it MUST be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.

WARNING

Do NOT connect the power supply to the indoor unit. This could result in electrical shock or fire.

WARNING

• Do NOT use locally purchased electrical parts inside the product.
• Do NOT branch the power supply for the drain pump, etc. from the terminal block. This could result in electrical shock or fire.

WARNING

Keep the interconnection wiring away from copper pipes without thermal insulation as such pipes will be very hot.

6.7.3 Guidelines when connecting the electrical wiring

Keep the following in mind:

- If stranded conductor wires are used, install a round crimp-style terminal on the end of the wire. Place the round crimp-style terminal on the wire up to the covered part and fasten the terminal with the appropriate tool.

a Stranded conductor wire
b Round crimp-style terminal

- Use the following methods for installing wires:

Wire type Installation method
Single-core wire	A
	a Curled single-core wireb Screwc Flat washer
Stranded conductor wire with round crimp-style terminal
	a Terminalb Screwc Flat washerO AllowedX NOT allowed

Tightening torques

Item Tightening torque (N·m)
M4 (X1M) 1.2~1.5
M4 (earth)

• If single-core wires are used, be sure to curl the end of the lead. Improper work may cause heat or fire.
• The earth wire between the pull relief and the terminal must be longer than the other wires.

6.7.4 Specifications of standard wiring components

Component
Power supply cable	Voltage 220~240 V
	Phase 1~
	Frequency 50 Hz
	Wire sizes MUST comply with applicable legislation
Interconnection cable (indoor←→outdoor)		4-core cable ≥1.5 mm ^2 and applicable for 220~240 V
Recommended field fuse		16 A
Earth leakage circuit breaker		MUST comply with applicable legislation

6.7.5 To connect the electrical wiring on the outdoor unit

1 Remove the service cover. See "6.2.2 To open the outdoor unit" on page 11.
2 Strip insulation (20 mm) from the wires.

a Strip wire end to this point b Excessive strip length may cause electrical shock or leakage.

3 Open the wire clamp.
4 Connect the interconnection cable and power supply as follows:

3x

5 Tighten the terminal screws securely. We recommend using a Phillips screwdriver.
6 Install the switch box cover.
7 Install the service cover.

6.8 Finishing the outdoor unit installation

6.8.1 To finish the outdoor unit installation

1 Insulate and fix the refrigerant piping and interconnection cable as follows:

a b c d e f

a Gas pipe
b Gas pipe insulation
c Interconnection cable
d Liquid pipe
e Liquid pipe insulation
f Finishing tape

2 Install the service cover.

6.8.2 To close the outdoor unit

NOTICE

When closing the outdoor unit cover, make sure that the tightening torque does NOT exceed 4.1 N·m.

1x 1 1 2

7 Commissioning

7.1 Overview: Commissioning

This chapter describes what you have to do and know to commission the system after it is installed.

Typical workflow

Commissioning typically consists of the following stages:

1 Checking the "Checklist before commissioning".
2 Performing a test run for the system.

7.2 Precautions when commissioning

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING

CAUTION

Do NOT perform the test operation while working on the indoor units.

When performing the test operation, NOT only the outdoor unit, but the connected indoor unit will operate as well. Working on an indoor unit while performing a test operation is dangerous.

CAUTION

Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT remove the fan guard. When the fan is rotating at high speed, it will cause injury.

NOTICE

Be sure to turn on the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor.

During test operation, the outdoor unit and the indoor units will start up. Make sure that the preparations of all indoor units are finished (field piping, electrical wiring, air purge, ...). See installation manual of the indoor units for details.

7.3 Checklist before commissioning

Do NOT operate the system before the following checks are OK:

	The indoor unit is properly mounted.
	The outdoor unit is properly mounted.
	The system is properly earthed and the earth terminals are tightened.
	The fuses or locally installed protection devices are installed according to this document, and have NOT been bypassed.
	The power supply voltage matches the voltage on the identification label of the unit.
	There are NO loose connections or damaged electrical components in the switch box.
	There are NO damaged components or squeezed pipes on the inside of the indoor and outdoor units.
	There are NO refrigerant leaks.
	The refrigerant pipes (gas and liquid) are thermally insulated.
	The correct pipe size is installed and the pipes are properly insulated.
	The stop valves (gas and liquid) on the outdoor unit are fully open.
	The following field wiring has been carried out according to this document and the applicable legislation between the outdoor unit and the indoor unit.
	DrainageMake sure drainage flows smoothly.Possible consequence: Condensate water might drip.
	The indoor unit receives the signals of the user interface.

The specified wires are used for the interconnection cable.

7.4 Checklist during commissioning

	To perform an air purge.
	To perform a test run.

7.5 To perform a test run

Prerequisite: Power supply MUST be in the specified range.

Prerequisite: Test run may be performed done in cooling or heating mode.

Prerequisite: Test run should be performed in accordance with the operation manual of the indoor unit to make sure that all functions and parts are working properly.

1 In cooling mode, select the lowest programmable temperature. In heating mode, select the highest programmable temperature. Test run can be disabled if necessary.

2 When the test run is finished, set the temperature to a normal level. In cooling mode: 26\~28°C, in heating mode: 20\~24°C.

3 The system stops operating 3 minutes after turning the unit OFF.

INFORMATION

- Even if the unit is turned OFF, it consumes electricity.

- When the power turns back on after a power break, the previously selected mode will be resumed.

7.6 Starting up the outdoor unit

See the indoor unit installation manual for configuration and commissioning of the system.

8 Hand-over to the user

Once the test run is finished and the unit operates properly, please make sure the following is clear for the user:

• Make sure that the user has the printed documentation and ask him/her to keep it for future reference. Inform the user that he can find the complete documentation on the url as earlier described in this manual.
• Explain the user how to properly operate the system and what to do in case of problems.
• Show the user what to do in relation to maintaining the unit.
• Explain the user about energy saving tips as described in the operation manual.

9 Maintenance and service

NOTICE

Maintenance MUST be done by an authorized installer or service agent.

We recommend performing maintenance at least once a year. However, applicable legislation might require shorter maintenance intervals.

NOTICE

In Europe, the greenhouse gas emissions of the total refrigerant charge in the system (expressed as tonnes CO_2 -equivalent) is used to determine the maintenance intervals. Follow the applicable legislation.

Formula to calculate the greenhouse gas emissions: GWP value of the refrigerant × Total refrigerant charge [in kg] / 1000

9.1 Overview: Maintenance and service

This chapter contains information about:

- The yearly maintenance of the outdoor unit

9.2 Maintenance safety precautions

DANGER: RISK OF ELECTROCUTION

DANGER: RISK OF BURNING

NOTICE: Risk of electrostatic discharge

Before performing any maintenance or service work, touch a metal part of the unit in order to eliminate static electricity and to protect the PCB.

WARNING

• Before carrying out any maintenance or repair activity, ALWAYS switch off the circuit breaker on the supply panel, remove the fuses or open the protection devices of the unit.
• Do NOT touch live parts for 10 minutes after the power supply is turned off because of high voltage risk.
• Please note that some sections of the electric component box are hot.
• Make sure you do NOT touch a conductive section.
• Do NOT rinse the unit. This may cause electric shocks or fire.

9.3 Checklist for yearly maintenance of the outdoor unit

Check the following at least once a year:

- Outdoor unit heat exchanger.

The heat exchanger of the outdoor unit can get blocked up due to dust, dirt, leaves, etc. It is recommended to clean the heat exchanger yearly. A blocked heat exchanger can lead to too low pressure or too high pressure leading to worse performance.

10 Troubleshooting

10.1 Overview: Troubleshooting

This chapter describes what you have to do in case of problems.

It contains information about solving problems based on symptoms.

Before troubleshooting

Carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring.

10.2 Precautions when troubleshooting

WARNING

• When carrying out an inspection on the switch box of the unit, ALWAYS make sure that the unit is disconnected from the mains. Turn off the respective circuit breaker.
• When a safety device was activated, stop the unit and find out why the safety device was activated before resetting it. NEVER bridge safety devices or change their values to a value other than the factory default setting. If you are unable to find the cause of the problem, call your dealer.

DANGER: RISK OF ELECTROCUTION

WARNING

Prevent hazards due to inadvertent resetting of the thermal cut-out: this appliance MUST NOT be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly turned ON and OFF by the utility.

DANGER: RISK OF BURNING

10.3 Solving problems based on symptoms

10.3.1 Symptom: Indoor units fall, vibrate or make noise

Possible causes Corrective action
The indoor units are not installed securely	Install the indoor units securely.

10.3.2 Symptom: The unit is NOT heating or cooling as expected

Possible causes Corrective action
Wrong connection of the electrical wires	Connect the electrical wires correctly.
Gas leakage	Check for gas leakage.

10.3.3 Symptom: Water leakage

Possible causes Corrective action
Incomplete thermal insulation (gas and liquid piping, indoor portions of the drain hose extension)	Make sure the thermal insulation of the piping and the drain hose is complete.
Improperly connected drainage	Secure the drainage.

10.3.4 Symptom: Electrical leakage

Possible causes Corrective action
The unit is NOT earthed correctly	Check the connection of the earth wiring.

10.3.5 Symptom: Unit does NOT function or burn damage

Possible causes Corrective action
The wiring was NOT performed in accordance with the specifications	Correct the wiring.

11 Disposal

NOTICE

Do NOT try to dismantle the system yourself: the dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery.

11.1 Overview: Disposal

Typical workflow

Disposing of the system typically consists of the following stages:

1 Pumping down the system.

2 Bringing the system to a specialized treatment facility.

INFORMATION

For more details, see the service manual.

11.2 To pump down

DANGER: RISK OF EXPLOSION

Pump down – Refrigerant leakage. If you want to pump down the system, and there is a leakage in the refrigerant circuit:

• Do NOT use the unit's automatic pump down function, with which you can collect all refrigerant from the system into the outdoor unit. Possible consequence: Self-combustion and explosion of the compressor because of air going into the operating compressor.
• Use a separate recovery system so that the unit's compressor does NOT have to operate.

NOTICE

During pump down operation, stop the compressor before removing the refrigerant piping. If the compressor is still running and the stop valve is open during pump down, air will be sucked into the system. Compressor breakdown or damage to the system can result due to abnormal pressure in the refrigerant cycle.

Pump down operation will extract all refrigerant from the system into the outdoor unit.

1 Remove the valve lid from the liquid stop valve and the gas stop valve.
2 Carry out the forced cooling operation. See "11.3 To start and stop forced cooling" on page 22.
3 After 5 to 10 minutes (after only 1 or 2 minutes in case of very low ambient temperatures ( <-10^ ), close the liquid stop valve with a hexagonal wrench.
4 Check on the manifold if the vacuum is reached.
5 After 2-3 minutes, close the gas stop valve and stop forced cooling operation.

a b c d e d

a Gas stop valve
b Closing direction
c Hexagonal wrench
d Valve lid

e Liquid stop valve

11.3 To start and stop forced cooling

There are 2 methods to perform forced cooling operation:

• using the indoor unit ON/OFF switch (if present on the indoor unit).
• using the indoor unit user interface.

Method 1: Using the indoor unit ON/OFF switch

1 Press the ON/OFF switch for at least 5 seconds.

Result: Operation will start.

Result: Forced cooling stops automatically after 15 minutes.

2 To stop operation, press the ON/OFF switch.

Method 2: Using the indoor unit user interface

3 Set the operation mode to cooling.

For the procedure, refer to the chapter "To perform a test run" in the installation manual of the indoor unit.

12 Technical data

A subset of the latest technical data is available on the regional Daikin website (publicly accessible). The full set of latest technical data is available on the Daikin extranet (authentication required).

12.1 Wiring diagram

Unified Wiring Diagram Legend
For applied parts and numbering refer to the wiring diagram sticker supplied on the unit. Part numbering is realized by Arabic numbers in ascending order for each part and is represented in the overview below by symbol “*” in the part code.
	CIRCUIT BREAKER		PROTECTIVE EARTH
	CONNECTION		PROTECTIVE EARTH (SCREW)
	CONNECTOR		RECTIFIER
EARTH: RELAY CONNECTOR
FIELD WIRING			SHORT CIRCUIT CONNECTOR
[FUSE: TERMINAL]
	INDOOR UNIT		TERMINAL STRIP
	OUTDOOR UNIT		WIRE CLAMP
BLK: BLACK	GRN: GREEN	PNK: PINK	WHT: WHITE
BLU: BLUE	GRY: GREY	PRP, PPL: PURPLE	YLW: YELLOW
BRN: BROWN	ORG: ORANGE	RED: RED
A*P	PRINTED CIRCUIT BOARD	PS	SWITCHING POWER SUPPLY
BS*	PUSH BUTTON ON/OFF, OPERATION SWITCH	PTC*	THERMISTOR PTC
BZ, H*O	BUZZER	Q*	INSULATED GATE BIPOLAR TRANSISTOR (IGBT)
C*	CAPACITOR	Q*DI	EARTH LEAK CIRCUIT BREAKER
AC*, CN*, E*, HA*, HE, HL*, HIN*, HR*, MR*, A, MR*, B, S*, U, V, W, X*A, K*R_*	CONNECTION, CONNECTOR	Q*L	OVERLOAD PROTECTOR
D*, V*D	DIODE	Q*M	THERMO SWITCH
DB*	DIODE BRIDGE	R*	RESISTOR
DS*	DIP SWITCH	R*T	THERMISTOR
E*H	HEATER	RC	RECEVER
F*U, FU*(FOR CHARACTERISTICS REFER TO PCB INSIDE YOUR UNIT)	FUSE	S*C	LIMIT SWITCH
FG*	CONNECTOR (FRAME GROUND)	S*L	FLOAT SWITCH
H*	HARNESS	S*NPH	PRESSURE SENSOR (HIGH)
H*P, LED*, V*L	PILOT LAMP, LIGHT EMITTING DIODE	S*NPL	PRESSURE SENSOR (LOW)
HAP	LIGHT EMITTING DIODE (SERVICE MONITOR GREEN)	S*PH, HPS*	PRESSURE SWITCH (HIGH)
HIGH VOLTAGE	HIGH VOLTAGE	S*PL	PRESSURE SWITCH (LOW)
IES	INTELLIGENT EYE SENSOR	S*T	THERMOSTAT
IPM*	INTELLIGENT POWER MODULE	S*W, SW*	OPERATION SWITCH
K*R, KCR, KFR, KHUR, K*M	MAGNETIC RELAY	SA*, F1S	SURGE ARRESTOR
L	LIVE	SR*, WLU	SIGNAL RECEIVER
L*	COIL	SS*	SELECTOR SWITCH
L*R	REACTOR	SHEET METAL	TERMINAL STRIP FIXED PLATE
M*	STEPPER MOTOR	T*R	TRANSFORMER
M*C	COMPRESSOR MOTOR	TC, TRC	TRANSMITTER
M*F	FAN MOTOR	V*, R*V	VARISTOR
M*P	DRAIN PUMP MOTOR	V*R	DIODE BRIDGE
M*S	SWING MOTOR	WRC	WIRELESS REMOTE CONTROLLER
MR*, MRCW*, MRM*, MRN*	MAGNETIC RELAY	X*	TERMINAL
N	NEUTRAL	X*M	TERMINAL STRIP (BLOCK)
n =*, N=*	NUMBER OF PASSES THROUGH FERRITE CORE	Y*E	ELECTRONIC EXPANSION VALVE COIL
PAM	PULSE-AMPLITUDE MODULATION	Y*R, Y*S	REVERSING SOLENOID VALVE COIL
PCB*	PRINTED CIRCU IT BOARD	Z*C	FERRITE CORE
PM*	POWER MODULE	ZF, Z*F	NOISE FILTER

13 Glossary

Dealer

Sales distributor for the product.

Authorized installer

Technical skilled person who is qualified to install the product.

User

Person who is owner of the product and/or operates the product.

Applicable legislation

All international, European, national and local directives, laws, regulations and/or codes that are relevant and applicable for a certain product or domain.

Service company

Qualified company which can perform or coordinate the required service to the product.

Installation manual

Instruction manual specified for a certain product or application, explaining how to install, configure and maintain it.

Operation manual

Instruction manual specified for a certain product or application, explaining how to operate it.

Maintenance instructions

Instruction manual specified for a certain product or application, which explains (if relevant) how to install, configure, operate and/or maintain the product or application.

Accessories

Labels, manuals, information sheets and equipment that are delivered with the product and that need to be installed according to the instructions in the accompanying documentation.

Optional equipment

Equipment made or approved by Daikin that can be combined with the product according to the instructions in the accompanying documentation.

Field supply

Equipment NOT made by Daikin that can be combined with the product according to the instructions in the accompanying documentation.

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DAIKIN INDUSTRIES CZECH REPUBLIC s.r.o.

U Nové Hospody 1/1155, 301 00 Plzeň Skvrňany, Czech Republic