Haier AB242ACBEA Service Manual page 25

(2) Piping size
AU242AHBEA
(3) Limitations for one way piping length and vertical height difference.
One way piping length:
less than 30m (for
Vertical height difference:
less than 20m (for AU242AHBEA).
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.
(4) Piping connection
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.
Forced fastening without centering may damage
the threads and cause a gas leakage.
Pipe dia
Liquid pipe 9.52mm
Gas pipe 15.88mm
Liquid pipe
9.52x0.8mm
Gas pipe 15.88x1.0mm
).
AU242AHBEA
Fastening torque
42N . m
98N . m
90+0.5
Install the removed flare nuts to
the pipes to be connected, then
flare the pipes.