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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 arr
ow 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
TORQUETORQUE (lbf
.
in)
139 174
260 304
434 477
651 694
(lbf
.
in)
Figure 1.6
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