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Installation procedure
Refrigerant piping
l In installation, if there is refrigerant gas leakage, please take ventilation measures
immediately. The refrigerant gas will generate poisonous gas upon contacting fire.
l After installation, please verify that there is no refrigerant leakage. The leaked re-
frigerant 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
Supplementary refrigerant
The refrigerant supplementation shall be as specified in the installation instructions
attached with the outdoor unit. The added refrigerant shall be R407C.
The adding procedure shall be aided with a measuring meter for a specified amount
of supplemented refrigerant
Requirement
l 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.
l The connection of indoor unit pipes must use double spanners.
l The installing torque shall be as given in the following table.
Double-spanner
operation
Connecting pipe
O.D.(mm)
ÿ6.35
ÿ9.52
ÿ12.70
ÿ15.88
Installing torque
(N-m)
11.8 (1.2kgf-m)
24.5 (2.5kgf-m)
49.0 (5.0 kgf-m)
78.4 (8.0 kgf-m)
Increased installing
torque (N-m)
13.7 (1.4 kgf-m)
29.4 (3.0 kgf-m)
53.9 (5.5 kgf-m)
98.0 (10.0 kgf-m)
! Caution
26
Pipe material
Model
Phosphorus deoxidized copper seamless pipe (TP
2
) for air conditioner
Pipe size
(mm)
AE182FCAHAAE092FCAHA
Gas side
ÿ15.88 ÿ12.70
Liquid side
ÿ9.52
ÿ6.35