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4. Flaring work.
Firmly hold copper pipe in a die in
the dimension shown in the table
below.
OUTER
DIAMETER (inch)
1/4
3/8
1/2
5/8
Connection Adjustment
1. Align the pipes to be connected.
2. Screw the flare nut with your
fingers, and then tighten it with a
spanner and torque wrench, as
shown in figure 1.6.
Caution: Excessive twisting may break
the nut, depending on the installation
conditions.
OUTER
DIAMETER (inch)
1/4
3/8
1/2
5/8
Refrigerant piping connection
13
A (inch)
Min.
Max.
0.05
0.03
0.06
0.04
0.04
0.07
0.08
0.09
TIGHTENING
TORQUE (lbf . in)
132.8
221.3
309.7
398.2
Bar
Handle
Clamp
handle
Indoor unit
Flare
tubing
Figure 1.6
ADDITIONAL TIGHTENING
TORQUE
Copper
pipe
Yoke
Red arrow mark
Pipings
nut
(lbf . in)
131.6
230.0
318.6
415.9
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