DC Inverter U-match Series Duct Type Unit
15
Centering the pipe against port on the indoor unit turn the flare nut with your hand.
Hold the torque wrench at its grip, keeping it in the right angle with the pipe as shown in Fig. 4.13,
in order to tighten the flare nut correctly.
When the flare nut is tightened properly by your hand, use a torque wrench to
finally tighten it.
Fig. 4.13
Fig. 4.14
Table 4.3 Flare nut tightening torque
Pipe Diameter
Tightening Torque
6mm (1/4inch)
15~30N·m (11~22ft.-1b.)
9.5mm (3/8inch)
35~40N·m (26~29ft.-1b.)
12.7mm (1/2inch)
45~50N·m (33~37ft.-1b.)
16mm (5/8inch)
60~65N·m (44~48ft.-1b.)
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.
Fig. 4.15
