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Installation Manual VMH SerieS Heat Controller, Inc.
D: Flaring work
Firmly hold copper pipe in a die in the dimension shown
in the table below.
Tightening Connection
• Align the center of the pipes.
• Sufciently tighten the are nut with ngers, and then
tighten it with a spanner and torque wrench as shown
in Fig.51 & 52.
Caution
Excessive torque can break nut depending on
installation conditions.
Outer diameter
in. (mm)
A in. (mm)
Max. Min.
o 1/4" (6.35) 0.5 (1.3) 0.276 (0.7)
o 3/8" (9.35) 0.63 (1.6) 0.394 (1.0)
o 1/2" (12.7) 0.709 (1.8) 0.394 (1.0)
Outer
Diameter
Tightening
torque
Additional tightening
torque
o 1/4" (6.35)
11.57 ft-lb
(160 kgf-cm)
14.46 ft-lb
(200 kgf-cm)
o 3/8" (9.35)
21.69 ft-lb
(300 kgf-cm)
25.3 ft-lb
(350 kgf-cm)
o 1/2" (12.7)
36.17 ft-lb
(500 kgf-cm)
39.78 ft-lb
(550 kgf-cm)
Refrigerant Pipe Connection