Heat Controller VMH 30 manual Refrigerant Pipe Connection

Installation, Operation & MaintenanceVMH 30/36 SERIESHeat Controller, Inc.

N					OUTDOOR SECTION
		3	REFRIGERANT PIPE CONNECTION
I
				Use a line set of copper pipe to connect the indoor and outdoor units.
T	Flaring			The line set does not come with the unit and must be purchased separately.
	1. Measure the distance between the indoor and outdoor sections. Cut a pipe with a pipe cutter,
	a little longer than the required measured distance.
	2. Remove flare nuts attached to indoor and outdoor unit, then						90O		Oblique Roughness Burr
	put them on the copper pipe, having completed burr removal.
	3. Flare the ends of the pipe by firmly holding the copper pipe
	in a die per the dimensions shown in the table below.							"A"	Handle
							Bar		Bar
		Outer diam.		A in.(mm)
		in. (mm)		Max.	Min.
		Ø1/4”(Ф6.35)		.05”(1.3)	.02”(0.7)		Copper pipe		Clamp handle
		Ø3/8”(Ф9.52)		.06”(1.6)	.04”(1.0)
		Ø1/2”(Ф12.7)		.07”(1.8)	.04”(1.0)		Indoor unit tubing Flare nut		Pipings
		Ø5/8”(Ф16)		.08”(2.2)	.08”(2.0)
		Ø3/4”(Ф19)		.09”(2.4)	.08”(2.0)	Outer	Tightening Additional tightening
	Tighteningconnection					diam.	torque		torque
						Ø1/4”(Ф6.35mm)	11.07 ft.lbf		11.79 ft.lbf
		Align pipes to be connected.					(153kgf.cm)		(163kgf.cm)
	.Sufficiently tighten the flare nut with fingers,					Ø3/8”(Ф9.52mm)	18.44 ft.lbf		19.17 ft.lbf
	.	and then tighten it with a spanner and torque					(255kgf.cm)		(265kgf.cm)
						Ø1/2”(Ф12.7mm)	25.82 ft.lbf		26.55 ft.lbf
		wrench as shown.
							(357kgf.cm)		(367kgf.cm)
		Excessive torque can break nut depending				Ø5/8”(Ф16mm)	33.20 ft.lbf		36.65 ft.lbf
							(459kgf.cm)		(479kgf.cm)
	on installation conditions, use torques						47.95 ft.lbf		49.40 ft.lbf
	provided in the table to the right.					Ø3/4”(Ф9mm)
							(663kgf.cm)		(683kgf.cm)

4CONNECT THE CABLE TO THE OUTDOOR UNIT

1.Remove the electrical control board cover from the outdoor unit by loosening the screw.

2.Connect the connective cables to the terminals as identified with their respective matched numbers on the terminal block of indoor and outdoor units. See the section of the manual called “connecting the communication cable” on page. 6.

3.Secure the cable onto the control board with the cord clamp.

4.To prevent water from entering the unit, form a loop or p-trap in the cable as illustrated in the diagram on page 3.

5.Wrap unused wires with electrical tape, so they do not touch any other electrical or metal parts.

Terminal block of outdoor unit

Cover

Screw

L1 L2 S L1 L2

L1 L2 S L1 L2

To indoor unit	To power supply To indoor unit	To power supply
	(1)	(2)

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