Installation Details; Wrench Torque Sheet For Installation; Connecting The Cables; Pipe Length And Elevation - Heat Controller A-VMH18DC-1 Service Manual

Heat Controller, Inc.

7. Installation Details

7.1 Wrench torque sheet for installation

Outside diameter
mm
Ф6.35
Ф9.52
Ф12.7

7.2 Connecting the cables

 The power wiring should always follow NEC and local codes, with respect to the unit's, rating plate. See
installation manual for additional information. Main power connection is 208/230V/1PH~60HZ.
 The communicating cable, which connects between the indoor and outdoor units must meet all NEC and
local codes, with respect to the unit's rating plate. We recommend using 14 AWG/4 conductor Stranded THHN
Ф Ф
6 V cable.

Pipe length and elevation

Unit
9K 3/8'' (Ф9.52)
12K/18K 1/2'' (Ф12.7)
Max. Total length for all rooms
NOTES:
Capacity test is based on standard length and maximum allowance length is based on reliability.

Oil trap should be installed per (3-5 meters)10-15ft.

Outdoor connections are ¼" (Ф6.35 mm) liquid and 3/8" (Ф9.52 mm) gas, therefore a reducer is

provided with all 12/18k indoor sections.
inch
1/4
3/8
1/2
Pipe size
Gas inch Liquid inch
(mm) (mm)
1/4'' (Ф6.35)
1/4'' (Ф6.35)
VMH SerieS
Torque
N m
.
15(153kgf.cm)
25(255kgf.cm)
35(357kgf.cm)
Max.
Standard
length
Elevation
(m)
B (m)
(5) (10)
16.5ft 33ft
Dual-zone (m)
(30)100ft
11
10
Additional tightening torque
N m
.
16(163kgf.cm)
26(265kgf.cm)
36(367kgf.cm)
Max. Additional
Length refrigerant
A (m)
(15)
50ft 0.2 oz/ft
Tri-zone (m) Quad-zone
(45)150ft (60)200ft
Service Manual
(g/m)
(20)
(m)