20
Installation Procedure Outdoor Unit
(2) Piping size
(1) Piping diagram
Connecting method (indoor unit)
Apply refrigerant oil at half union as large and flare nut.
To bend a pipe, give the roundness as possible not to crush the pipe.
When connecting pipe, hold the pipe centre to centre then screw nut on by hand, refer to Fig.
Be careful not to let foreign matters, such as sands enter the pipe.
(3) Piping connection
Forced fastening without centering may damage the threads and cause a gas leakage.
Pipe dia Fastening torque
Liquid pipe 6.35mm
Gas pipe 15.88mm
Liquid pipe 9.52mm
Gas pipe 19.05mm
14.2-17.2N
.
m
61.8-75.4N
.
m
32.7-39.9N
.
m
97.2-118.6N
.
m
Gas pipe 12.7mm
49.5-60.3N
.
m
Liquid pipe
Gas pipe
9.52x0.8mm
19.05x1.0mm
Liquid pipe 9.52x0.8mm
Gas pipe
15.88x1.0mm
Precautions for refrigerant piping
Do not twist or crush piping.
Be sure that no dust is mixed in piping.
Bend piping with as wide angle as possible.
Keep insulating both gas and liquid piping.
Check flare-connected area for gas leakage.
Install the removed flare nuts
to the pipes to be connected,
then flare the pipes.
90+0.5
4. Refrigerant piping
Outdoor
unit
Gas pipe
Liquid pipe
Flare connection
Indoor
unit
3-way stop valve
3-way stop valve
YIFFYC030BAEFA
YIFFYC036BAEFA
YIFFYC036BANFA
YIFFYC040BAEFB
YIFFYC040BANFA
YIFFYC025BAEFA
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