Installation & Operation Manual -
VFH-B 30/36/42 Series
Inverterflex Series
9
4.2
Refrigerant Lines
Refrigerant lines
for indoor unit and outdoor unit in manifold mode. (As shown below).
Fig 6
4.2.1 Piping between the Indoor and Outdoor Units
(1)
If the liquid and gas
shut off
valves
A , B, C, D or E have not been connected to the indoor units,
please
remove
the cap.
(2)
Refer to Fig.7 for the moments of torque for tightening screws.
(3)
Tighten the flare nut
by hand.
(4)
After that, tighten the screw by the torque wrench
until it
clicks
(as shown in Fig.7).
(5)
The bending degree of the pipe can not be too small; otherwise it will crack.
P
lease use a pipe
bender to
bend the pipe.
(6)
Wrap the exposed refrigerant pipe and the joints by
with insulation, then
with
seal
plastic tape.
P ipe
F lare N ut
S panner
Fid 7
1) During the connection of the indoor unit and the refrigerant pipe, never pull any joints of the indoor unit by force;
otherwise the capillary pipe or other pipe may crack, which would
then
result in leakage.
2) The refrigerant pipe should be supported by brackets
.
3) If the piping connection size of outdoor unit does not match the piping connection size of indoor unit, use the
piping connection dimension of indoor
adapter
.
Pipe adapters ship with indoor and outdoor units
.
4) For the
Inverterflex
system, each pipe should be labeled to
identify the indoor
system
to avoid mistaken
connections.
4.2.2 Allowable pipe length and
rise between
indoor and outdoor units
If the total refrigerant pipe length (liquid pipe) is s
horter
than that listed in the table below, no
additional refrigerant will be charged.
Table 6
Model
A-VFH30QB-1
A-VFH36QB-1
A-VFH42PB-1
Total Liquid Pipe
Lenght (a+b+c+d+e)
131.2ft
131.2ft
131.2ft
Pipe
diameter
Thickness of
copper tube
Tightening
torque
Φ
1/4 inch
≥0.
0315 inch 11
～
22 ft·lbf
Φ
3/8 inch
≥0.
0315 inch 26
～
29 ft·lbf
Φ
1/2 inch
≥0.
0315 inch 33
～
37 ft·lbf
Φ
5/8 inch
≥
0.0394 inch 44
～
48 ft·lbf
10
Inverterflex Series
