Haier HDU-18CF03 Operating & Installation Manual page 31

Haier duct type air conditioner operation & installation manual indoor unit
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Installation Manual For Indoor Unit
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 2 ) for air conditioner
Gas side
Pipe size
Liquid side
(mm)
Gas side
Liquid side
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.
Connecting pipe
O.D.(mm)
ÿ6.35
ÿ12.70
ÿ9.52
ÿ15.88
! Caution
ÿ12.70
ÿ6.35
ÿ15.88
ÿ9.52
Installing torque
(N-m)
11.8 (1.2kgf-m)
49.0 (5.0 kgf-m)
24.5 (2.5kgf-m)
78.4 (8.0 kgf-m)
30
HDU-18CF03
HDU-18HF03
HDU-28CF03
HDU-28HF03
Double-spanner
operation

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This manual is also suitable for:

Hdu-18hf03Hdu-28cf03Hdu-28hf03