Gree U-match Series

DC Inverter U-match Series Cassette Type Unit
25
3.2.3.4 Connection Pipe of Indoor and Outdoor Units
NOTICE
①. Connect the pipe to the unit. Please follow the instructions stated in the figures
below. Use both spanner and torque wrench.
②. When connecting the tapered screw nut, first apply chilled machine oil on its
inner and outer surface and then screw it up for 3~4 circles.
③. Confirm the tightening torque by referring to the following table (If the screw
nut is over-twisted, it may be damaged and cause leakage).
④. Check whether gas leakage occurs to the connection pipe and then apply
thermal insulation, as shown below.
⑤. Wind sponge around the joint of gas pipe and heat insulation sheath of gas
collecting pipe.
⑥. Be sure to connect gas pipe after liquid pipe is connected.
Sponge
Threaded fastener(×4)
Liquid pipe
Gas inlet pipe
Heat insulation sheath
(for the gas tube)
Heat insulation sheath
(for the liquid tube)
Pipe diameter (in.)
Tightening torque (N·m)
1/4
15-30
3/8
35-40
1/2
45-50
5/8
60-65
3/4
70-75
7/8
80-85