(2) Piping size
Gas pipe
15.88x1.0mm
Install the removed flare nuts to
the pipes to be connected, then
flare the pipes.
Liquid pipe
Gas pipe
9.52x0.8mm
19.05x1.0mm
Liquid pipe
9.52x0.8mm
(3) Limitations for one way piping length and vertical height difference.
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.
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.
(4) Piping connection
Forced fastening without centering
may damage the threads and cause a
gas leakage.
Gas pipe
12.7x1.0mm
Liquid pipe
6.35x0.8mm
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
AU36NAIEAA
AU362AIEAA
AU48NAIEAA
AU60NAIEAA
Refrigerant piping
8
90+0.5
AU242AGEAA
AU282AHEAA
AU28NAHEAA
Installation Procedure
AU182AEEAA
Model
One way piping length
Vertical height difference
(between indoor and outdoor)
less than 30 m
AU362AIEAA AU36NAIEAA
AU48NAIEAA AU60NAIEAA
AU242AGEAA AU282AHEAA
AU28NAHEAA
less than 50 m
less than 15 m
less than 30 m
AU182AEEAA
less than 20 m
less than 10 m
