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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
15
A (inch)
Min.
Max.
0.051
0.028
0.063
0.039
0.039
0.071
0.087
0.095
TIGHTENING
TORQUE (lbf . in)
139
260
434
651
Bar
Handle
Clamp
handle
Indoor unit
Flare
tubing
Figure 1.6
ADDITIONAL TIGHTENING
TORQUE
Copper
pipe
Yoke
Red arrow mark
Pipings
nut
(lbf . in)
174
304
477
694
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