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PART No. 9374342686-02

INSTALLATION MANUAL

VRF system indoor unit (Duct type)

For authorized service personnel only.

R32

ARXD004HLBH

ARXD005HLBH

ARXD007HLBH

ARXD009HLBH

ARXD012HLBH

ARXD014HLBH

ARXD018HLBH

ARXD024HLBH

R32

R32.

Refer to the rating label for the serial number, manufactured year and month.

Made in P.R.C.

[Original instructions]

Contents

1. SAFETY PRECAUTIONS .............................................................................................1

1.1. Precautions for using R32 refrigerant ................................................................1

2. ABOUT THIS PRODUCT .............................................................................................3

2.1. Refrigerant leakage sensor ...............................................................................3

2.2. Installation tools .................................................................................................4

2.3. Accessories .......................................................................................................4

2.4. Optional parts ....................................................................................................4

2.5. Operable conditions of temperature and humidity .............................................4

3. INSTALLATION WORK ................................................................................................4

3.1. Selecting an installation location .......................................................................4

3.2. Installation dimensions ......................................................................................5

3.3. Installing the unit ................................................................................................5

4. PIPE INSTALLATION ...................................................................................................7

4.1. Selecting the pipe material ................................................................................7

4.2. Pipe requirement ...............................................................................................7

4.3. Flare connection (Pipe connection) ...................................................................7

4.4. Installing thermal insulation ...............................................................................8

5. INSTALLING DRAIN PIPES .........................................................................................8

5.1. When drain pump is used ..................................................................................8

5.2. When drain pump is not used (Natural drainage) ..............................................8

5.3. Install the drain pipe ..........................................................................................8

6. ELECTRICAL WIRING .................................................................................................9

6.1. Electrical requirement ......................................................................................10

6.2. Wiring method .................................................................................................10

6.3. Unit wiring ........................................................................................................10

6.4. Connection of wiring ........................................................................................11

6.5. Optional parts wiring ........................................................................................11

6.6. External input and external output (Optional parts) .........................................12

6.7. Remote sensor (Optional parts) ......................................................................13

6.8. IR receiver unit (optional parts) .......................................................................13

6.9. Auto louver grille (optional parts) .....................................................................13

7. FIELD SETTING .........................................................................................................13

7.1. Setting the address ..........................................................................................13

7.2. Custom code setting ........................................................................................13

7.3. Static pressure mode .......................................................................................14

7.4. Switching of drainage function .........................................................................14

7.5. Switching of airflow direction louver function ...................................................14

7.6. Function setting ...............................................................................................14

8. TEST RUN ..................................................................................................................15

8.1. Test run using Outdoor unit (PCB) ...................................................................15

8.2. Test run using Remote Controller ....................................................................15

8.3. Operation/exit procedure of test mode for safety measure operation .............15

9. CHECK LIST ..............................................................................................................16

10. ERROR CODES .......................................................................................................16

1. SAFETY PRECAUTIONS

• Be sure to read this manual thoroughly before installation.

• The warnings and precautions indicated in this manual contain important information

pertaining to your safety. Be sure to observe them.

• Hand this manual, together with the operation manual to the customer.

• Request the customer to keep them on hand for future use, such as for relocating or

repairing the unit.

WARNING

This mark indicates procedures which, if improperly performed,

might lead to the death or serious injury of the user.

CAUTION

This mark indicates procedures which, if improperly performed,

might possibly result in personal harm to the user, or damage to

property.

WARNING

Request your dealer or a professional installer to install the unit in accordance with this

manual. An improperly installed unit can cause serious accidents such as water leak-

age, electric shock, or fire. If the unit is installed in disregard of the instructions in the

installation manual, it will void the manufacturer’s warranty.

Do not turn on the power until all work has been completed. Turning on the power

before the work is completed can cause serious accidents such as electric shock or fire.

If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant

comes in contact with a flame, it produces a toxic gas.

Installation work must be performed in accordance with national wiring standards by

authorized personnel only.

Except for EMERGENCY, never turn off main as well as sub breaker of the indoor units

during operation. It will cause compressor failure as well as water leakage.

First, stop the indoor unit by operating the control unit, converter or external input device

and then cut the breaker. Make sure to operate through the control unit, converter or

external input device. When the breaker is designed, locate it at a place where the us-

ers cannot start and stop in the daily work.

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 might not contain an odor.

CAUTION

Read carefully all security information before use or install the air conditioner.

Do not attempt to install the air conditioner or a part of the air conditioner by yourself.

This unit must be installed by qualified personnel with a capacity certificate for handling

refrigerant fluids. Refer to regulation and laws in use on installation place.

The installation must be carried out in compliance with regulations in force in the place

of installation and the installation instructions of the manufacturer.

This unit is part of a set constituting an air conditioner. It must not be installed alone or

with non-authorized by the manufacturer.

Always use a separate power supply line protected by a circuit breaker operating on all

wires with a distance between contact of 3 mm for this unit.

The unit must be correctly grounded and the supply line must be equipped with a dif-

ferential breaker in order to protect the persons.

The units are not explosion proof and therefore should not be installed in explosive

atmosphere.

Never touch electrical components immediately after the power supply has been turned

off. Electric shock may occur. After turning off the power, always wait 5 minutes before

touching electrical components.

This unit contains no user-serviceable parts. Always consult authorized service person-

nel to repairs.

When moving, consult authorized service personnel for disconnection and installation of

the unit.

1.1. Precautions for using R32 refrigerant

The basic installation work procedures are the same as conventional refrigerant (R410A,

R22) models. However, pay careful attention to the following points:

WARNING

• Since the working pressure is 1.6 times higher than that of refrigerant R22 models,

some of the piping and installation and service tools are special. (Refer to “2.2. Instal-

lation tools”.) Especially, when replacing a refrigerant R22 model with a new refrigerant

R32 model, always replace the conventional piping and flare nuts with the R32 and

R410A piping and flare nuts on the outdoor unit side. For R32 and R410A, the same

flare nut on the outdoor unit side and pipe can be used.

• Models that use refrigerant R32 and R410A have a different charging port thread

diameter to prevent erroneous charging with refrigerant R22 and for safety. Therefore,

check beforehand. [The charging port thread diameter for R32 and R410A is 1/2-

20UNF.]

• Be more careful than R22 so that foreign matter (oil, water, etc.) does not enter the

piping. Also, when storing the piping, securely seal the opening by pinching, taping,

etc. (Handling of R32 is similar to R410A.)

This manual includes requirements of clauses according to Table DD.1 (Installation, Main-

tenance and repair, Decommissioning)

Product specificaties