Haier HDU-18HF03 User Manual download pdf (Page 31)

Installation Manual For Indoor Unit

Gas side ÿ15.88

Liquid side ÿ9.52

HDU-18CF03

HDU-28CF03

In installation, if there is refrigerant gas leakage, please take ventilation measures immediately.

The refrigerant gas will generate poisonous gas upon contacting fire.

After installation, please verify that there is no refrigerant leakage. The leaked refrigerant gas

will produce poisonous gas when meeting fire source such as heater and furnace etc.

Allowable pipe length and drop

These parameters differ according to the outdoor unit. See the instruction manual attached

with the outdoor unit for details.

Pipe material and size

Pipe material Phosphorus deoxidized copper seamless pipe (TP

) for air conditioner

Pipe size

(mm)

Gas side ÿ12.70

Liquid side ÿ6.35

Supplementary refrigerant

The refrigerant supplementation shall be as specified in the installation instructions attached with

the outdoor unit R22

The adding procedure shall be aided with a measuring meter for a specified amount of supplemented

refrigerant.

Requirement

Overfilling or underfilling of refrigerant will cause compressor fault. The amount of the

added refrigerant shall be as specified in the instructions.

Connection of refrigerant pipe

Conduct flared connection work to connect all refrigerant pipes.

The connection of indoor unit pipes must use double spanners.

The installing torque shall be as given in the following table.

Double-spanner

operation

Connecting pipe

O.D.(mm)

ÿ6.35

ÿ12.70

Installing torque

(N-m)

11.8 (1.2kgf-m)

49.0 (5.0 kgf-m)

! Caution

HDU-18HF03

HDU-28HF03

ÿ9.52

ÿ15.88

24.5 (2.5kgf-m)

78.4 (8.0 kgf-m)

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Haier HDU-18HF03 User Manual Page 31

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