19
Installation Manual For Indoor Unit
Double-spanner
operation
For series 142 182
For series 242
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 (TP2M) for air conditioner
Pipe size
(mm)
Gas side Ø12.70
Liquid side Ø6.35
Supplementary refrigerant
The refrigerant supplementation shall be as specified in the installation instructions attached with
the outdoor unit.
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.
Wall thicknessof connection pipe * 0.8mm
Connecting pipe
O.D.(mm)
Ø6.35
Ø9.52
Ø12.70
Ø15.88
Installing torque
(N-m)
11.8 (1.2kgf-m)
24.5 (2.5 kgf-m)
49.0 (5.0 kgf-m)
78.4 (8.0 kgf-m)
! Caution
Type
Pipe size
(mm) Gas side Ø15.88
Liquid side Ø9.52