Refrigerant piping connection
15
Caution:
Excessive twisting may break
the nut, depending on the installation
conditions.
4. Flaring work.
Firmly hold copper pipe in a die in
the dimension shown in the table
below.
Connection Adjustment
OUTER
A (inch)
Max.
Min.
DIAMETER (inch)
0.051
0.063
0.071
0.095
0.028
0.039
0.039
0.087
1/4
3/8
1/2
5/8
Bar
pipe
Handle
Clamp
handle
Yoke
Red arrow mark
Copper
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.
Flare
nut
Pipings
Indoor unit
tubing
OUTER
TIGHTENING
ADDITIONAL TIGHTENING
DIAMETER (inch)
1/4
3/8
1/2
5/8
TORQUE
TORQUE (lbf .in)
139
174
260
304
434
477
651
694
(lbf.in)
Figure 1.6
