Gree U-MATCH Series Service Manual page 74

Be sure to connect the gas pipe after connecting the liquid pipe completely.
3.1.4 Connecting the Pipe at the Outdoor Side Unit
Tighten the flare nut of the connection pipe at the outdoor unit valve connector. The tightening
method is the same as that as at the indoor side.
3.1.5 Checking the Pipe Connections for Gas Leaking
For both indoor and outdoor unit side, check the joints for gas leaking by the use of a gas leakage
detector without fail when the pipes are connected.
Sponge
Threaded fastener(×4)
Gas inlet pipe
Liquid pipe
Figure 3-2-5
Table 3-2-2 Flare nut tightening torque
Pipe Diameter
1/4〞（Inch）
3/8〞（Inch）
1/2〞（Inch）
5/8〞（Inch）
3/4〞（Inch）
7/8〞（Inch）
CAUTION!
Gas pipe
Liquid pipe
Pipe
coupling
3-way valve
Figure 3-2-6
71
U-Match Series DC Inverter Service Manual
Heat insulation sheath
(for the liquid tube)
Heat insulation sheath
(for the gas tube)
Tightening Torque
15-30 (N· m)
35-40 (N· m)
45-50 (N· m)
60-65 (N· m)
70-75 (N· m)
80-85 (N· m)
or
or
2-way valve