Welding method of pipe, Cut and flaring method

Installation instruction

When bending the pipes, give the roundness as large as possible, to avoid crashing and flat the pipes.

To connect the pipe, fit the center and use hand to screw the nut, as shown in figure:

If do not fit the center and screw the nut hard, the screw thread may be damaged, which will cause refrigerant leakage.

Pay attention not to let alien matters, such as sand, water get into the pipe.

Joint Nut

Spanner

	Spanner

Pipe diameter	Fasten torque
Liquid pipe 9.52mm	32.7~39.9 N.m
Gas pipe 15.88mm	62.8~74.5 N.m

(3)Connect the connection pipe of outdoor unit

According to the connection method to connect the connection pipe and in/out liquid pipe and gas pipe.

2. Welding method of pipe

(1)The refrigerant pipe should use clean new pipe. When performing work, pay attention to preventing vapor, dust from entering into the pipe.

(2)When loosening and fastening the connection screw nut, do use two hands to handle. If use one hand, it cannot reach the necessary fastening level.

Please perform the fastening of the screw nut according to the specified torque

External diameter of connection pipe (mm)	Installation torque (N.m)	Fastening torque (N.m)
*9.52	24.5 (2.5kgf.m)	29.4 (3.0kgf.m)
*15.88	49.0 (5.0kgf.m)	53.9 (5.5kgf.m)

3. Cut and flaring method

Use pipe cutter to cut the pipe, the burrs must be removed.

After inserting the flarer, perform flared nut.

Flarer		Flaring dimensions as follows:
A	Connect pipe		Pipe diameter	Dimension A (mm)
	Connect pipe		Pipe diameter	Dimension A (mm)
	Liquid pipe		9.52mm (3/8")	1.0-1.2
	Gas pipe		15.88mm (5/8")	1.4-2.2
Correct		Incorr
Slant	Broken	Burrs	Uncompleted	Too long

When connect the accessory thermal insulation material with the thermal insulation material of the onsite connection pipe, do not leave any gap. After finishing installing the thermal insulation material as below Figure shown, then use tape to bind them properly.

When connection, the connecting part
should not leave any gap, and the thermal				150
should not leave any gap, and the thermal
insulation material should be overlapped.
insulation material should be overlapped.


Thermal insulation material
of onsite connection pipe

Thermal insulation material

Thermal insulation material (on-site arrangement) Thickness: over 10mm

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