Refrigerant Pipe Connection Refrigerant Pipe Connection - Heat Controller VMH 09 Installation Manual

draining off the outdoor unit during the heating
mode.
Heat Controller, Inc.
Refrigerant Pipe Connection
Refrigerant pipe connection
1. Flaring work
Main cause for refrigerant leakage
is due to defect in the flaring work.
Carry out correct flaring work
using the following procedure:
A: Cut the pipes and the cable.
Use line set kit or copper tubes/pipes
1. Use the piping kit accessory or pipes
purchased locally.
purchased locally.
2. Measure the distance between the indoor
and the outdoor unit.
Cut the pipes/tubes a little longer than
3. Cut the pipes a little longer than the
the measured distance.
measured distance.
Cut the cable 1.5m longer than the pipe/
4. Cut the cable 1.5m longer than the pipe
tube length.
length.
B: Burr removal
1. Completely remove all burrs from the cut
cross section of pipe/tube.
2. Put the end of the copper tube/pipe in a
downward direction as you remove burrs in
order to avoid dropping burrs into the tubing.
C: Putting nut on
Remove flare nuts attached to indoor and
outdoor unit, then put them on pipe/tube
having completed burr removal.(not possible
to put them on after flaring work)
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)
o 5/8" (15.875)
INSTALLATION MANUAL
A in. (mm)
Max. Min.
0.05 (1.3) 0.03 (0.7)
0.06 (1.6) 0.04 (1.0)
0.07 (1.8) 0.04 (1.0)
0.09 (2.4) 0.09 (2.2)
90
Point down
Flare nut
Copper tube
24
8
Seal
Drain pipe
VMH Inverter Mini-Split
Fig.46
Oblique Roughness
Fig. 17
Fig.47
Pipe
Reamer
Fig.48
Fig. 18
Fig. 19
Fig.49
Burr