Heat Controller VMH 09 Installation Manual page 10

VMH Inverter Mini-Split
Refrigerant Pipe Connection
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. 20 & 21.
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)
54.28 ft-lb
o 5/8" (15.87)
(750 kgf-cm)
Caution
Excessive torque can break nut depending on
installation conditions.
INSTALLATION MANUAL
Additional tightening
torque
14.46 ft-lb
(200 kgf-cm)
25.3 ft-lb
(350 kgf-cm)
39.78 ft-lb
(550 kgf-cm)
57.90 ft-lb
(800 kgf-cm)
9
Heat Controller, Inc.
Fig. 20
Fig. 21
Fig. 22