McQuay MQS-174018-CFC216A Installation And Operation Manual page 22

DC Inverter U-match Series Floor Ceiling Type Unit
Be sure to connect the gas pipe after connecting the liquid pipe completely.
5.3.4 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.
Fig. 4.11
Fig. 4.12
Table 4.3 Flare nut tightening torque
Pipe Diameter
1/4 Inch）
3/8 Inch）
5/8 Inch）
1/2 Inch）
3/4 Inch）
7/8 Inch）
CAUTION!
20
Tightening Torque
15-30 (N·m)
35-40 (N·m)
60-65 (N·m)
45-50 (N·m)
70-75 (N·m)
80-85 (N·m)
Fig. 4.13