AHSC-60R - Air Conditioning Airrex - Free user manual and instructions

USER MANUAL AHSC-60R Airrex

Exterior view of a large industrial air conditioning unit with red wheels and ventilation grilles (no visible text or symbols)

▶ Thank you for purchasing the unit.
Before operation, please read this user's manual carefully.
▶ You can find the user manuals for all our products online.

TABLE OF CONTENTS

SAFETY INSTRUCTIONS 3\~4

GENERAL ADVICE BEFORE USE 4

EXTERIOR DESCRIPTION 5\~6

SPECIFICATIONS 7

CONTROL PANEL FUNCTIONS 8\~9

MODE CHANGING METHOD 10

HOW TO SET THE 'OFF' TIMER 11

'ERROR' and WARNING INDICATORS 14

FIRE ALARM & ERROR SIGNAL CONNECTION 15

ECONOMY MODE / TROUBLE SHOOTING 16

WIRING DIAGRAM 17

MAINTENANCE 18

PRODUCT INSTALLATION / ACCESSOIRES 19

THE INSTALLATION, SERVICE AND OPERATION MANUAL 20 \~ 29

This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.

Children should be supervised to ensure that they do not play with the appliance.

It is essential that you read 'SAFETY INSTRUCTIONS' carefully before use and follow them at all times.

▶ Keep this manual on hand for reference.

This unit is specified for use on the rated voltage power supply.

The warranty form is on the last page. Please complete it now and keep it in a safe place.

We have a policy of continual improving on our products. The contents (features and specifications) in this manual are therefore subject to change without notice.

▶ This product is for fixed appliance.

● WARNING

- Keep this manual in a visible location near the unit for easy reference.

The following symbols are for your guidance :

You must NOT. You MUST.

Use a circuit breaker that fits the capacity. (It may cause fire and electric shock)

Before cleaning, disconnect the unit. (Otherwise risk of electric shock)

Do not use a damaged power cable. (Short, fire or shock hazard)

Do not use an extension lead unless of the approved type. (Risk of fire and / or electric shock)

Do not place anything on top of the machine. (This could cause electric shock, malfunction or injury)

Do not kink or sharply bend the power cable nor put any weight on it. (The insulation may be damaged causing fire or electric shock)

Check control panel after turn off circuit breaker first. (Risk of electric shock and / or malfunction)

Do not use this unit on unstable or inclined surfaces. Always use on solid flat floor. (Risk of falling causing injury, fire or malfunction)

● INSTALLATION

WARNINGS REGARDING PROPER LOCATION FOR INSTALLATION

WARNING

Do not use the unit in explosive environments or in areas where flammable gas leakage may occur.

Do not use the unit in areas where it will be exposed to rain or water.

Do not use the unit in a corrosive atmosphere.

Do not install the unit on uneven or sloping surface. The unit may roll or topple over even if the casters are set to the locked position.

Since the product has a heater, you must keep it away from objects that could cause a fire.

MOVING THE UNIT

Unlock the casters and push the unit to a flat surface and set the caster brakes to the locked position.

PLUGGING IN THE UNIT

Use the proper wire gauge according to the product specifications.

AHSC-42R : 10AWG or larger, AHSC-60R 220/1 : 8AWG or larger, AHSC-60R 460/3 : 10AWG or larger.

Check the prongs and surface of the power cord plug for dust/dirt. If dust and/or dirt are present, wipe off with a clean, dry cloth.

Check the power cord, plug and prongs for damage or overload.

If any damage or overload is found, contact a qualified repair technician or a qualified electrician to perform replacement or repair of the power cord, plug or prongs.

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/disconnect the power cord or attempt to operate buttons with wet hands. This could result in electrical shock.

SAFETY INSTRUCTIONS

CAUTION

Do not place this unit on uneven, unstable or inclined surface. (This could cause malfunction)

When storing this unit, keep it in a dry, cool place. (To prevent corrosion and malfunction)

If not being used for some time or if lightening is present, always disconnect power. (To prevent risk of electric shock, short circuit or fire)

Do not spray water onto this unit nor use solvents such as benzene, thinner or alcohol for cleaning. (There is a risk of electric shock and / or short circuit)

Designed for outdoor and indoor use.

GENERAL ADVICE BEFORE USE

• Ensure the safety of the location in which the unit is to be used.
• Ensure the floor or ground is smooth and flat.
• Ensure at least 20 inch space all around the unit.
• When in position, LOCK the casters to prevent rolling.
• Never use the unit at more than 2^ incline.
• If you use condensate pump, connect it to the housing in the condensate pump connecting box.
• You have to connect standard power cable.
  If the power cable is damaged, it must be replaced by the manufacturer, its service agent or qualified person in order to avoid a hazard.

● FOR MAXIMUM EFFICIENCY

• In airtight areas use vertical exhaust into ceiling.
• If possible, send exhaust out through a window or door to outside.
• Ensure rated electricity supply.

Waste electrical and electronic products must be disposed separately from normal household waste. When you dispose of such products, please recycle where facilities exist. Follow the guidance of your local authority and/or ask the shop where you purchased the product.

● FRONT VIEW

Technical diagram of an industrial air conditioning unit with numbered components for identification.

1
3 Handle Air Inlet
5 Condensate pump connecting box
7 Condensate Water Pump (Option)

2 Air OutletCondenser Outlet
4
6 Condensate Water Outlet
8 Floor Fixing Device

EXTERIOR DESCRIPTION

● BACK & SIDE VIEW

Technical diagram of a portable air conditioning unit with numbered components for identification.

1 Digital Controller

2 Electric Panel

3 Condenser Inlet

4 Power Connect (Cabinet inside)

5 Fire Alarm Connection Port

6 Casters (Lockable)

MODEL AHSC-42R 220/1 AHSC-60R 220/1 AHSC-60R 460/3
Capacity	Cooling	Btu/h (W)	42,000 (12,300) 60,000	(17,600) 60,000 (17,600)
	Heating 47.000 (13,800) 60,000 (17,600) 60,000 (17,600)
Power supply - 220 V~, 60 Hz 460 V 3~, 60 Hz
Power Consumption	Cooling	kW	4.52 5.68 5.5
	Heating 4.35 5.47 5.4
Current Consumption	Cooling	A	20.8 26 8.4
	Heating		20	25.1 8.3
Dehumidification	Max.	gal/day	60.5 78	77
	Nom.		47	54	57
Refrigerant (R-454B)		Ibs	5.29
Dimensions (W x D x H) inch			29 x 57 x 51
Weight		Ibs	562	595
Operating Conditions	Cooling		65 ~ 118°F (18 ~ 48°C)
	Heating		50 ~ 81°F (10 ~ 27°C)
	Dehumidification		59 ~ 118°F (15 ~ 48°C)
Power Cord			STANDARD

•Cooling operation is generally used at 40^ C.
• Heating operation is generally used at 20^ C.

CONTROL PANEL FUNCTIONS

Room/Spot Temp. 88 Setting Temp. 88 6 x 9 Remote Room Comp. Error V | ^ 12

CONTROL PANEL FUNCTIONS

NAME DESCRIPTION
1 Power	Use to power on / off.
2 ∨ ∧ Button	Raises or lowers the setting temperature or sleep (off) time.
3 Mode	Use to select Cooling / Fan / Dehumidification mode.
4 Heat	Use to select heating mode.
5 Off Timer	You can set the time to stop the unit. You can set 0~24 hours. Time intervals are 30 mins. up to 10 hours and then 1 hour between 10 and 24 hours.
6 Room	If the LED is on, the displayed temperature is for room temp.
7 Comp.	When the compressor is operating, the LED is on.
8 Error	Error signal.
9 Display	Display room temperature, and also the setting temperature and sleep time if they had been set.

MODE CHANGING METHOD

Room/Spot Temp. CO Setting Temp. OL

COOLING MODE

If you press the 'Mode' button. 'COOL' is displayed. Then LED is on.

Room/Spot Temp. FR Setting Temp. F N

FAN MODE

If you press the 'Mode' button, when the cooling is operating, 'FAN' is displayed. Then LED is off.

Room/Spot Temp. dE Setting Temp. HU

● DEHUMIDIFICATION MODE

If you press the 'Mode' button, when the fan is operating, 'dEHU' is displayed. Then LED is on.

Room/Spot Temp. HE Setting Temp. AT °F

HEAT MODE

If you press the 'HEAT' button. 'HEAT' is displayed. Then LED is on.

This function enables you to set the length of time you want the unit to operate.

STEP 1

Setting Temp. 73 → Setting Temp. hr 0.5

1. When unit is operating, press the 'Off Timer' button and set the length of time you want by pressing ∧ or ∨. Each time you press the button you will increase the 'time to off' period by 30 mins, up to 10 hours, and 1 hour up to 24 hours. The display will show 0.5 for 30 min and 1 for an hour. One and a half hours will show 1.5.

STEP 2

Setting Temp. hr 2.0

1. When you have finished setting the time period, the 'Off Timer' lamp will be on which indicates the unit is in sleep (Off Timer) mode.

STEP 3

Setting Temp. hr 2.0 → Setting Temp. hr 1.0

AFTER 1hr

1. If you press the 'Off Timer' button during its operation, the remaining time will be shown.

CANCEL

1 sec

1. To cancel 'Off Timer', press and hold 'Off Timer' button for 1 second. It will then switch the timer off automatically.

Room/Spot Temp. 79 Setting Temp. 64 hr √ | ∧

• When you turn ON, the setting temperature is displayed.
• You can change setting temperature.

● Display Room Temperature Range & Setting Range.

COOLING MODE

Mode	Display range	Setting range
Room	32°F ~ 99°F	64°F ~ 86°F

Cooling operates when room temperature is higher than set temperature.

Cooling stops when room temperature is lower than set temperature.

HEATING MODE

Mode	Display range	Setting range
Room	32°F ~ 99°F	68°F ~ 99°F

Heating operates when room temperature is lower than set temperature.

Heating stops when room temperature is higher than set temperature.

- LOCK or UNLOCK

Room/Spot Temp. *F 79 5 sec Room/Spot Temp. *F 79.

- If you press 'v' for 5 seconds when the unit is turned off, you can control 'LOCK, UNLOCK' mode.

- When you set 'LOCK' there will be a dot '.' below the number in the screen.

- You can set 'UNLOCK' or 'LOCK' after pressing '^' button.

Room/Spot Temp. F Setting Temp. hr oc Room/Spot Temp. F Setting Temp. hr ct

● TEMPERATURE UNIT

Room/Spot Temp. °F 79 → Room/Spot Temp. °C 26 V | ∧ 3 sec

- If you want to change temperature unit F ^ , when the unit is stopped, push 'V' and '^' button simultaneously for 3 seconds.

'ERROR' and WARNING INDICATORS

Error Code	Problem	Cause	Corrective Action
	High pressure	Blocked Cond filter. Blocked / kinked exhaust duct. Ambient temperature is too high.	Clean the Cond filter. Ensure exhaust duct is not blocked / kinked. Do not use the air conditioner if ambient temperature is higher than 113°F.
	Low pressure Verify Electrical. Refrigerant may be low or empty.		Verify Power (Voltage / Amps). Check refrigerant level and refrigerant leakage. Clean Filter and Coil. Check Evaporator Filter. Check Evaporator Coil.
	Sensor Temperature sensor is short-circuited or cut.		Exchange temperature sensor.
	Water full in pump Water in the pump is full. Check the condensation pump.
	Anti-Freezing alarm	Evaporator is below 25°F (-4°C) due to being used in a low ambient temperature area.	Do not use the unit in an ambient temperature less than 65°F (18°C). (Only cooling mode) Check refrigerant level.
	Reverse phase (Only AHSC-60R 460/3)	The 3 phase circuit is not correctly connected.	Check wiring.
	Fire alarm signal Fire alarm signal is received from Fire alarm system.		Reset unit by pushing and holding the "OFF TIMER" button for 5 seconds.

● Fire Alarm

FIRE ALARM SYSTEM FA1 FA2 ALARM

Input Fire Alarm Signal Terminal FA1 FA2 ER1 ER2

Input Terminal FA1 and FA2

When the signal from the fire alarm system is detected, the unit turns off and does not operate until the unit has been RESET.

Connecting the fire alarm wire from fire alarm system

1. Open the power box cover.
2. Use recommended fire alarm wire size from 16 AWG to 26 AWG for a solid wire, or 16 AWG to 22 AWG for a stranded wire with ring terminal for #5 stud size.
3. Connect fire alarm to terminal FA1 and FA2.

● Error Signal Connection

WARNING DEVICE ER1 ER2 WARNING INDICATOR

FA1 FA2 ER1 ER2 Output Error Signal Terminal

Output Terminal ER1 and ER2

The unit will output an Error signal (normal open dry contact) when an "Error" has occurred, to show what the failure is on the unit.

Connecting Error Signal with warning device

1. Open the power box cover.
2. Use recommended error signal wire size from 16 AWG to 26 AWG for a solid wire, or 16 AWG to 22 AWG for a stranded wire with ring terminal for #5 stud size.
3. Connect the end of the error signal wire to ER1 and ER2, and the other end to the compatible with various warning devices such as alarm speaker, light indicators, and etc.

ECONOMY MODE

Model	Evap. Fan Cond. Fan				Economy mode (Push the button for 3 sec.)	Etc.
	Economy Normal Economy Normal
HSC-12R	Stop after 30 sec.	Run --				Fan integral type
HSC-14R/18R/24R	Stop after 30 sec.	Run --				Fan integral type
AHSC-14R/18R	Stop after 30 sec.	Run --				Fan integral type
HSC-36R	Stop after 1 min.	Run	Stop after 1 min.	Run
HSC-60R	Stop after 1 min.	Run	Stop after 1 min.	Run
AHSC-42R/60R	Stop after 30 sec.	Run Stop	Run
AHSC-140R	Stop after 1 min.	Run	Stop after 1 min.	Run
HWC-19R	Stop after 30 sec.	Run --
HWC-60R	Stop after 1 min.	Run --

TROUBLE SHOOTING

TROUBLE CHECK REMEDY
NOT WORKING	Power cable correctly connected. Connect cable correctly.
	Power button "OFF". Press Power button to "ON".
	Fuse (supply) blown. Exchange fuse in board.
	Breaker on switch board tripped. Check load capacity and reset.
	Ambient temperature too high. Check operating temperature range.
POOR COOLING	Filter blocked with dust. Clean Filter.
	Dust in heat exchanger. Clean heat exchanger.
	Obstacle against inlet side. Remove and allow 20" (50 cm) clearance.

● AHSC-42R 1 Ph / AHSC-60R 1 Ph

L1 L2 G 220 V-, 1 Ph MCCB (1) (4) 250 V-, 10 A L1 MC T1 C COMP S R T3 MC L3 (28) IN T OUT CON3 CON7 C.M E.M MAIN B/D GND MAIN B/D CON7 CON6 FIRE ALARM B/D TB EA1 EA2 EA1 EA2 CON1 CON2 CON4 FRONT B/D CON1 CON2 R1 R2 R4 R7 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25

COMP	COMPRESSOR	C.M	CONDENSER MOTOR	OT	SPOT THERMISTOR	WL	WATER LEVEL SENSOR
MC	COMPRESSOR MAGNETIC CONTACTOR	E.M	EVAPORATOR MOTOR	AF1	EVA ANTI FREEZING SENSOR	PL	PUMP LEVEL SENSOR
SV	DEFROST SOLENOID VALVE	HP	HIGH PRESSURE SWITCH	AF2	COND ANTI FREEZING SENSOR
4W	4-WAY REVERSING VALVE	LP	LOW PRESSURE SWITCH	RT	ROOM THERMISTOR

● AHSC-60R 3 Ph

graph TD
    A["460 V~, 3 Ph"] --> B["RPD B/D"]
    B --> C["L2"]
    B --> D["L1"]
    B --> E["T"]
    B --> F["220 V~"]
    F --> G["RPD B/D"]
    G --> H["CON5"]
    G --> I["CON7"]
    G --> J["CON10"]
    G --> K["CON11"]
    G --> L["CON12"]
    G --> M["CON13"]
    G --> N["CON14"]
    G --> O["CON15"]
    G --> P["CON16"]
    G --> Q["CON17"]
    G --> R["CON18"]
    G --> S["CON19"]
    G --> T["CON20"]
    G --> U["CON21"]
    G --> V["CON22"]
    G --> W["CON23"]
    G --> X["CON24"]
    G --> Y["CON25"]
    G --> Z["CON26"]
    G --> AA["CON27"]
    G --> AB["CON28"]
    G --> AC["CON29"]
    G --> AD["CON30"]
    G --> AE["CON31"]
    G --> AF["CON32"]
    G --> AG["CON33"]
    G --> AH["CON34"]
    G --> AI["CON35"]
    G --> AJ["CON36"]
    G --> AK["CON37"]
    G --> AL["CON38"]
    G --> AM["CON39"]
    G --> AN["CON40"]
    G --> AO["CON41"]
    G --> AP["CON42"]
    G --> AQ["CON43"]
    G --> AR["CON44"]
    G --> AS["CON45"]
    G --> AT["CON46"]
    G --> AU["CON47"]
    G --> AV["CON48"]
    G --> AW["CON49"]
    G --> AX["CON50"]
    G --> AY["CON51"]
    G --> AZ["CON52"]
    G --> BA["CON53"]
    G --> BB["CON54"]
    G --> BC["CON55"]
    G --> BD["CON56"]
    G --> BE["CON57"]
    G --> BF["CON58"]
    G --> BG["CON59"]
    G --> BH["CON60"]
    G --> BI["CON61"]
    G --> BJ["CON62"]
    G --> BK["CON63"]
    G --> BL["CON64"]
    G --> BM["CON65"]
    G --> BN["CON66"]
    G --> BO["CON67"]
    G --> BP["CON68"]
    G --> BQ["CON69"]
    G --> BR["CON70"]
    G --> BS["CON71"]
    G --> BT["CON72"]
    G --> BU["CON73"]
    G --> BV["CON74"]
    G --> BW["CON75"]
    G --> BX["CON76"]
    G --> BY["CON77"]
    G --> BZ["CON78"]
    G --> CA["CON79"]
    G --> CB["CON80"]
    G --> CC["CON81"]
    G --> CD["CON82"]
    G --> CE["CON83"]
    G --> CF["CON84"]
    G --> CG["CON85"]
    G --> CH["CON86"]
    G --> CI["CON87"]
    G --> CJ["CON88"]
    G --> CK["CON89"]
    G --> CL["CON90"]
    G --> CM["CON91"]
    G --> CN["CON92"]
    G --> CO["CON93"]
    G --> CP["CON94"]
    G --> CQ["CON95"]
    G --> CR["CON96"]
    G --> CS["CON97"]
    G --> CT["CON98"]
    G --> CU["CON99"]
    G --> CV["PUMP"]

MC COMPRESSOR MOTOR		52C	MAGNETIC CONTACTOR (COMPRESSOR)		HIGH PRESSURE SWITCHHP	AF1	EVA ANTI FREEZING SENSOR
MF1	EVA MOTOR	52F1	MAGNETIC CONTACTOR (EVA FAN MOTOR)		LOW PRESSURE SWITCHLP	AF2	COND ANTI FREEZING SENSOR
MF2	COND MOTOR	52F2	MAGNETIC CONTACTOR (COND FAN MOTOR)	5V	DEFROST SOLENOID VALVE	PL	PUMP LEVEL SENSOR
T	TRANSFORMER	51C	OVER CURRENT RELAY (COMPRESSOR)	4W	4-WAY REVERSING VALVE	WL	WATER LEVEL SENSOR
RT	ROOM THERMISTOR	51F1	OVER CURRENT RELAY (EVA FAN MOTOR)	C.M	CONDENSER MOTOR	OT SPOT THERMISTOR
RPD	REVERSE PHASE DETECTOR	51F2	OVER CURRENT RELAY (COND FAN MOTOR)	E.M	EVAPORATOR MOTOR

MAINTENANCE

After cleaning, completely dry the inside of the unit by operating it on 'Fan' mode.

※ CLEANING FILTER.

1. After removing bolt, detach CABI FRONT LOWER.
2. Pull the filter up to detach.
3. Change the filter.
4. Reassemble in reverse order of disassembly.

CABI FRONT LOWER

Close-up of a metal bracket with a red arrow pointing to a detail (no text or symbols visible)

Use 5/8" hose for drainage

Exterior view of a metallic industrial air conditioning unit with red wheels and ventilation grilles (no text or symbols visible)

PRODUCT INSTALLATION

5 m 5 m Floor fixing device

ACCESSORIES

ITEM DRAWING
Cold Air	Aluminium Filter for Evaporator
Air Inlet Air Outlet	Exhaust Chamber ∅ 400
	Handle (4 pcs)

※ AHSC-42R / 60R is available both for indoor and outdoor use.

The installation, service and operation manual

Warning symbol of a flame inside a red diamond border (no text or numbers)

Warning sign depicting a flame symbol in yellow and black, indicating hazard or electrical hazard.

Refrigerant Safety Group A2L

WARNING

• Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
• The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater.
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odour.
• Continuous air circulation required for proper functioning. Unit must be powered except for service.

1. Installation

The appliance shall be installed in accordance with national wiring regulations.

MODEL	AHSC-42R/60R
The minimum room area	53.7 m^2

Unventilated areas

- Non-duct connected appliances containing A2L refrigerants with the supply and return air openings in the conditioned space may have the body of the appliance may be installed in open areas such as false ceilings not being used as return air plenums, as long as the conditioned air does not directly communicate with the air of the false ceiling.

The installation, service and operation manual

2. Service

2.1. Competence of service personnel

• Information of procedures additional to usual information for refrigerating appliance installation, repair, maintenance and decommission procedures is required when an appliance with FLAMMABLE REFRIGERANTS is affected.
- The training of these procedures is carried out by national training organisations or manufacturers that are accredited to teach the relevant national competency standards that may be set in legislation.
- The achieved competence should be documented by a certificate.

2.2 Information and training

The training should include the substance of the following:

• Information about the explosion potential of FLAMMABLE REFRIGERANTS to show that flammables may be dangerous when handled without care.
• Information about POTENTIAL IGNITION SOURCES, especially those that are not obvious, such as lighters, light switches, vacuum cleaners, electric heaters.
• Information about the different safety concepts.

• Information about refrigerant detectors:

• Principle of function, including influences on the operation.
• Procedures, how to repair, check or replace a refrigerant detector or parts of it in a safe way.
• Procedures, how to disable a refrigerant detector in case of repair work on the refrigerant carrying parts.
  • Information about the concept of sealed components and sealed enclosures.

• Information about the correct working procedures

a) Commissioning

- Ensure that the floor area is sufficient for the REFRIGERANT CHARGE or that the ventilation duct is assembled in a correct manner.

- Connect the pipes and carry out a leak test before charging with refrigerant.

- Check safety equipment before putting into service.

b) Maintenance

- Portable equipment shall be repaired outside or in a workshop specially equipped for servicing units with FLAMMABLE REFRIGERANTS.

- Ensure sufficient ventilation at the repair place.

- Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.

- Discharge capacitors in a way that won't cause any spark. The standard procedure to short circuit the capacitor terminals usually creates sparks.

- Reassemble sealed enclosures accurately. If seals are worn, replace them.

- Check safety equipment before putting into service.

The installation, service and operation manual

c) Repair

• Portable equipment shall be repaired outside or in a workshop specially equipped for servicing units with FLAMMABLE REFRIGERANTS.
• Ensure sufficient ventilation at the repair place.
• Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.
• Discharge capacitors in a way that won't cause any spark.

- When brazing is required, the following procedures shall be carried out in the following order:

- Safely remove the refrigerant following local and national regulations. If the recovery is not required by national regulations, drain the refrigerant to the outside. Take care that the drained refrigerant will not cause any danger. In doubt, one person should guard the outlet. Take special care that drained refrigerant will not float back into the building;

• Purge the refrigerant circuit with oxygen free nitrogen;
• Evacuate the refrigerant circuit;
• Remove parts to be replaced by cutting or brazing.
• Purge the braze point with nitrogen during the brazing procedure required for repair.
• Carry out a leak test before charging with refrigerant.

d) Decommissioning

• If the safety is affected when the equipment is put out of service, the REFRIGERANT CHARGE shall be removed before decommissioning.
• Ensure sufficient ventilation at the equipment location.
• Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.
• Discharge capacitors in a way that won't cause any spark.
• Remove the refrigerant. If the recovery is not required by national regulations, drain the refrigerant to the outside. Take care that the drained refrigerant will not cause any danger.
  In doubt, one person should guard the outlet. Take special care that drained refrigerant will not float back into the building.

e) Disposal

• Ensure sufficient ventilation at the working place.
• Remove the refrigerant. If the recovery is not required by national regulations, drain the refrigerant to the outside. Take care that the drained refrigerant will not cause any danger. In doubt, one person should guard the outlet. Take special care that drained refrigerant will not float back into the building.

The installation, service and operation manual

• When flammable refrigerants are used,
• evacuate the refrigerant circuit.
• purge the refrigerant circuit with oxygen free nitrogen.
• cut out the compressor and drain the oil.

Ventilated enclosure

Safety of the appliance depends on ventilation of the housing.

Switching off the appliance or opening of the enclosure has a significant effect on the safety.

Care should be taken to ensure sufficient ventilation before.

Checks to the area

Prior to beginning work on systems containing FLAMMABLE REFRIGERANTS, safety checks are necessary to ensure that the risk of ignition is minimized.

For repair to the REFRIGERATING SYSTEM, 1 to 5 shall be completed prior to conducting work on the system.

1. Work procedure

Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapour being present while the work is being performed.

1. General work area

All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out. Work in confined spaces shall be avoided.

1. Checking for presence of refrigerant

The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially toxic or flammable atmospheres. Ensure that the leak detection equipment being used is suitable for use with all applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.

1. Presence of fire extinguisher

If any hot work is to be conducted on the refrigerating equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand. Have a dry powder or CO^2 fire extinguisher adjacent to the charging area.

The installation, service and operation manual

5. No ignition sources

No person carrying out work in relation to a REFRIGERATING SYSTEM which involves exposing any pipe work shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion.

All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during which refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. “No Smoking” signs shall be displayed.

Checks to the refrigerating equipment

Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the manufacturer's maintenance and service guidelines shall be followed. If in doubt, consult the manufacturer's technical department for assistance.

The following checks shall be applied to installations using FLAMMABLE REFRIGERANTS:

- the actual REFRIGERANT CHARGE is in accordance with the room size within which the refrigerant containing parts are installed;

- the ventilation machinery and outlets are operating adequately and are not obstructed;

- if an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of refrigerant;

- marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected;

- refrigerating pipe or components are installed in a position where they are unlikely to be exposed to any substance which may corrode refrigerant containing components, unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being so corroded.

Checks to electrical devices

Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are advised.

Initial safety checks shall include:

• that capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
• that no live electrical components and wiring are exposed while charging, recovering or purging the system;
  • that there is continuity of earth bonding.

The installation, service and operation manual

Repairs to sealed components

- During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation.

- Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such a way that the level of protection is affected. This shall include damage to cables, excessive number of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc.

Repair to intrinsically safe components

Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use.

Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere. The test apparatus shall be at the correct rating.

Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere from a leak.

NOTE The use of silicon sealant can inhibit the effectiveness of some types of leak detection equipment. Intrinsically safe components do not have to be isolated prior to working on them.

Cabling

Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects.

The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans.

Detection of flammable refrigerants

Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall not be used.

The following leak detection methods are deemed acceptable for all refrigerant systems.

Electronic leak detectors may be used to detect refrigerant leaks but, in the case of FLAMMABLE REFRIGERANTS, the sensitivity may not be adequate, or may need re-calibration.

(Detection equipment shall be calibrated in a refrigerant-free area.) Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant employed, and the appropriate percentage of gas (25 % maximum) is confirmed.

The installation, service and operation manual

NOTE Examples of leak detection fluids are

• bubble method,
• fluorescent method agents.

If a leak is suspected, all naked flames shall be removed/extinguished.

If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part of the system remote from the leak.

Removal of refrigerant shall be according to the following procedures shall be carried out in the following order:

- Safely remove the refrigerant following local and national regulations. If the recovery is not required by national regulations, drain the refrigerant to the outside. Take care that the drained refrigerant will not cause any danger. In doubt, one person should guard the outlet. Take special care that drained refrigerant will not float back into the building.

• Purge the refrigerant circuit with oxygen free nitrogen.
• Evacuate the refrigerant circuit.
• Remove parts to be replaced by cutting or brazing.
• Purge the braze point with nitrogen during the brazing procedure required for repair.
• Carry out a leak test before charging with refrigerant.

Charging procedures

In addition to conventional charging procedures, the following requirements shall be followed.

• Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines shall be as short as possible to minimise the amount of refrigerant contained in them.
• Cylinders shall be kept in an appropriate position according to the instructions.
• Ensure that the REFRIGERATING SYSTEM is earthed prior to charging the system with refrigerant.
• Label the system when charging is complete (if not already).
• Extreme care shall be taken not to overfill the REFRIGERATING SYSTEM.

Decommissioning

Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely.

Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of recovered refrigerant. It is essential that electrical power is available before the task is commenced.

a) Become familiar with the equipment and its operation.
b) Isolate system electrically.

The installation, service and operation manual

c) Before attempting the procedure, ensure that:

• mechanical handling equipment is available, if required, for handling refrigerant cylinders;
• all personal protective equipment is available and being used correctly;
• the recovery process is supervised at all times by a competent person;
• recovery equipment and cylinders conform to the appropriate standards.

d) Pump down refrigerant system, if possible.

e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.

f) Make sure that cylinder is situated on the scales before recovery takes place.

g) Start the recovery machine and operate in accordance with instructions.

h) Do not overfill cylinders (no more than 80 % volume liquid charge).

i) Do not exceed the maximum working pressure of the cylinder, even temporarily.

j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off.

k) Recovered refrigerant shall not be charged into another REFRIGERATING SYSTEM unless it has been cleaned and checked.

Labelling

Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. The label shall be dated and signed.

For appliances containing FLAMMABLE REFRIGERANTS, ensure that there are labels on the equipment stating the equipment contains FLAMMABLE REFRIGERANT.

Recovery

When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely.

When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge is available. All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e. special cylinders for the recovery of refrigerant). Cylinders shall be complete with pressure-relief valve and associated shut-off valves in good working order. Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.

The installation, service and operation manual

The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of the flammable refrigerant.

If in doubt, the manufacturer should be consulted. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition.

The recovered refrigerant shall be processed according to local legislation in the correct recovery cylinder, and the relevant waste transfer note arranged. Do not mix refrigerants in recovery units and especially not in cylinders.

If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant.

The compressor body shall not be heated by an open flame or other ignition sources to accelerate this process. When oil is drained from a system, it shall be carried out safely.

3. Transportation, marking and storage

3.1. Transportation

Attention is drawn to the fact that additional transportation regulations may exist with respect to equipment containing flammable gas.

The maximum number of pieces of equipment or the configuration of the equipment permitted to be transported together will be determined by the applicable transport regulations.

3.2. Marking

Signs for similar appliances used in a work area are generally addressed by local regulations and give the minimum requirements for the provision of safety and/or health signs for a work location.

All required signs are to be maintained and employers should ensure that employees receive suitable and sufficient instruction and training on the meaning of appropriate safety signs and the actions that need to be taken in connection with these signs.

The effectiveness of signs should not be diminished by too many signs being placed together.

Any pictograms used should be as simple as possible and contain only essential details.

Disposal of equipment using flammable refrigerants

See national regulations.

The installation, service and operation manual

3.3. Storage

The storage of the appliance should be in accordance with the applicable regulations or instructions, whichever is more stringent.

Storage of packed (unsold) equipment

Storage package protection should be constructed in such a way that mechanical damage to the equipment inside the package will not cause a leak of the REFRIGERANT CHARGE.

The maximum number of pieces of equipment permitted to be stored together will be determined by local regulations.

Warning symbol of a flame inside a red diamond border (no text or numbers)

Warning sign depicting a flame symbol in yellow and black, indicating hazard or electrical hazard.

Refrigerant Safety Group A2L

ATTENTION

- agents fluorescents.

(Applicable to first retail purchaser only)

AIRREX unit gives the more reliable performance, comfort and durability the more they are used. They are built under a strict quality assurance regime which includes inspection both during and after production and exhaustive reliability testing.

In the unlikely event you have any problems, please contact your dealer or distributor. If the problem is as a result of a production fault or failure, repairs will be undertaken free of charge during the period of warranty subject to the following warranty conditions:

1. If the problem has been caused by customer error or misuse, abuse or damage, then all repairs will be charged for.

2. This warranty applies to your country.

3. Proof and date of purchase must be supplied.

4. Please complete the details below and keep this warranty in a safe place.

5. All transportation charges back to the dealer are at customer's cost. Keep all original packaging to facilitate return. Return to customer will be at dealer's cost (if genuine warranty claim).

DESCRIPTION AIRREX	HEAT PUMP
MODEL AHSC-42R / 60R
DATE OF PURCHASE PRODUCT SERIAL NO.
WARRANTY PERIOD (	) Months
DISTRIBUTOR	Name of Company
	Telephone No.
CUSTOMER DETAILS	Name :
	Address :
	Telephone :

TEMP-AIR ^5

EQUIPMENT SALES

www.tempairsales.com

2031 Exchange Parkway, Suite A, Waco, TX 76712

888-535-8841

[e-mail]

Manufactured by : HEPHZIBAH CO.,LTD.

(Juan-dong) 86, Gilpa-ro 71beon-gil, Michuhol-gu, Incheon, Korea

TEL: [phone]

FAX : [phone]

Website : www.airrex.co.kr