Heat Controller VMH 36, VMH 27 Refrigerant Pipe Connection, Tightening Connection, Flaring work

VMH InverterFlex Mini-Split INSTALLATION MANUAL Heat Controller, Inc.

Refrigerant Pipe Connection

D: Flaring work

Firmly hold copper pipe in a die in the dimension shown in the table below.

Outer diameter	A in. (mm)
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)

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	Additional tightening
Diameter	torque	torque
o 1/4" (6.35)	11.57 ft-lb	14.46 ft-lb
	(160 kgf-cm)	(200 kgf-cm)
o 3/8" (9.35)	21.69 ft-lb	25.3 ft-lb
	(300 kgf-cm)	(350 kgf-cm)
o 1/2" (12.7)	36.17 ft-lb	39.78 ft-lb
	(500 kgf-cm)	(550 kgf-cm)

Caution

Excessive torque can break nut depending on installation conditions.

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