Haier AU282AHERA Refrigerant piping, Piping size, Piping connection, Installation Procedure

Installation Procedure

Refrigerant piping

(2) Piping size

AU122AEERA	Liquid pipe	6.35x0.8mm
AU182AFERA	Gas pipe	12.7x1.0mm
AU242AGERA	Liquid pipe	9.52x0.8mm
AU282AHERA
AU362AHERA	Gas pipe	15.88x1.0mm
AU36NAHERA
AU422AIERA	Liquid pipe	9.52x0.8mm
AU42NAIERA
AU522AIERA	Gas pipe	19.05x1.0mm
AU52NAIERA

90+0.5

Install the removed flare nuts to the pipes to be connected, then flare the pipes.

(3) Limitations for one way piping length and vertical height difference.

M o d e l		One way piping length	Vertical height difference
			(between indoor and outdoor)
AU122AEERA		less than 20 m	less than 15 m
AU182AFERA		less than 30 m	less than 15 m
AU242AGERA	AU282AHERA
AU362AHERA	AU36NAHERA	less than 50 m	less than 30 m
AU422AIERA	AU42NAIERA
AU522AIERA	AU52NAIERA

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 diameter	Fastening torque
Liquid pipe 6.35mm	14.2-17.2N.m
Liquid pipe 9.52mm	32.7-39.9N.m
Gas pipe 12.7mm	49.5-60.3N.m
Gas pipe 15.88mm	61.8-75.4N.m
Gas pipe 19.05mm	97.2-118.6N.m

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