Outline piping, Piping size, Piping connection

INSTALLATION MANUAL FOR OUTDOOR UNIT

4.Refrigerant piping

(1)Outline piping

Flare connection

Indoor unit

(2) Piping size

Gas piping	12.7(1/2")x1.0mm
Liquid piping	6.35(1/4")x0.8mm

Liquid	3-way valve
pipe
	Outdoor
	unit
Gas pipe	3-way valve
Gas pipe
	Flare connection

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

90 + 0.5

(3)Limitations for one way piping length and vertical height One way piping length: less than

15m.

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

Apply refrigerant oil at half union and flare nut.

To bend a pipe, give the roundness as large as possible not to crash 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	Fastening torque

Liquid pipe 6.35mm(1/4")	11.8N.m
Gas pipe 12.7mm(1/2")	49.0N.m

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