Cassette Type Air Conditioner Unit
16
Examine the connection pipe to see if it leaks, then take the treatment of heat
insulation, as shown in the Fig. 4.13.
Use the medium-sized sponge to insulate the coupler of the gas pipe.
Sponge
Threaded fastener(×4)
Liquid pipe
Gas inlet pipe
Heat insulation sheath
(for the gas tube)
Heat insulation sheath
(for the liquid tube)
Fig. 4.13
Table 4.4 Flare nut tightening torque
Pipe Diameter
Tightening Torque
1/4
〞（
Inch
）
15-30 (N·m)
3/8
〞（
Inch
）
35-40 (N·m)
1/2
〞（
Inch
）
45-50 (N·m)
5/8
〞（
Inch
）
60-65 (N·m)
3/4
〞（
Inch
）
70-75 (N·m)
7/8
〞（
Inch
）
80-85 (N·m)
CAUTION!
Be sure to connect the gas pipe after connecting the liquid pipe completely.
4.3.4 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.
