Heat Controller VMH 09 Installation Manual page 12

VMH InverterFlex Mini-Split
Refrigerant Pipe Connection
D: Flaring work
Firmly hold copper pipe in a die in the dimension shown
in the table below.
Outer diameter
in. (mm)
o 1/4" (6.35)
o 3/8" (9.35)
o 1/2" (12.7)
Tightening Connection
• Align the center of the pipes.
• Sufficiently tighten the flare nut with fingers, and then
tighten it with a spanner and torque wrench as shown
in Fig.51 & 52.
Outer Tightening
Diameter torque
11.57 ft-lb
o 1/4" (6.35)
(160 kgf-cm)
21.69 ft-lb
o 3/8" (9.35)
(300 kgf-cm)
36.17 ft-lb
o 1/2" (12.7)
(500 kgf-cm)
Caution
Excessive torque can break nut depending on
installation conditions.
INSTALLATION MANUAL
A in. (mm)
Max.
0.5 (1.3) 0.276 (0.7)
0.63 (1.6) 0.394 (1.0)
0.709 (1.8) 0.394 (1.0)
Additional tightening
torque
14.46 ft-lb
(200 kgf-cm)
25.3 ft-lb
(350 kgf-cm)
39.78 ft-lb
(550 kgf-cm)
Min.
11
Heat Controller, Inc.