Install Instructions

Installation Manual - B-VMH18,24UU-1
14
6. Place flaring tool onto the form.
7.
Table 8.2: PIPING EXTENSION BEYOND FLARE FORM
8.
Step 4: Connect pipes
1.
2.
Indoor unit tubing
Flare nut
Pipe
Fig. 8.8
3.
4.
5. While firmly gripping the nut, use a to
Fig. 8.9
CAUTION
•
•
NOTE ON MINIMUM BEND RADIUS
Bendthe pipe with thumb
min-radius 10cm (3.9”)
Fig. 8.10
6.
7.
8.
9.
CAUTION
Pipe
gauge
Tightening
torque
Flare dimension (A)
(Unit: mm/Inch)
Flare shape
Min. Max.
Ø 6.4
R0.4~0.8
45
°
±
2
90
°
±
4
A
Fig. 8.7
Ø 9.5
Ø 12.7
Ø 15.9
Ø 19.1
Ø 22
65-67 N.m
(663-683 kgf.cm)
23.2/0.91 23.7/0.93
75-85N.m
(765-867 kgf.cm)
26.4/1.04 26.9/1.06
18-20 N.m
(183-204 kgf.cm)
8.4/0.33 8.7/0.34
25-26 N.m
(255-265 kgf.cm)
13.2/0.52 13.5/0.53
35-36 N.m
(357-367 kgf.cm)
16.2/0.64 16.5/0.65
45-47 N.m
(459-480 kgf.cm)
19.2/0.76 19.7/0.78
Check to make sure there is no refrigerant leak after
completing the installation work. If there is a refrigerant
leak, ventilate the area immediately and evacuate the
system (refer to the Air Evacuation section of this manual).
Turn the handle of the aring tool clockwise until
the pipe is fully ared. Flare the pipe in accordance
with the dimensions shown in table 8.2.
Remove the aring tool and are form, then inspect
the end of the pipe for cracks and even aring.
Connect the copper pipes to the indoor unit rst, then connect
it to the outdoor unit. You should rst connect the low-pressure
pipe, then the high-pressure pipe.
When connecting the are nuts, apply a thin coat
of refrigeration oil to the ared ends of the pipes.
Align the center of the two pipes that you will
connect.
Tighten the are nut as tightly as possible by hand.
Using a spanner, grip the nut on the unit tubing.
While rmly gripping the nut, use a torque wrench
to tighten the are nut according to the torque
values in table 8.2.
NOTE: Use both a spanner and a torque wrench when
connecting or disconnecting pipes to/from the unit.
Be sure to wrap insulation around the piping.
Direct contact with the bare piping may result in
burns or frostbite.
Make sure the pipe is properly connected. Over
tightening may damage the bell mouth and under
tightening may lead to leakage.
Carefully bend the tubing in the middle according to the
diagram below. DO NOT bend the tubing more than
90° or more than 3 times.
After connecting the copper pipes to the indoor
unit, wrap the power cable, signal cable and the
piping together with binding tape.
NOTE: DO NOT intertwine signal cable with other wires.
While bundling these items together, do not intertwine
or cross the signal cable with any other wiring.
Thread this pipeline through the wall and connect
it to the outdoor unit.
Insulate all the piping, including the valves of the
outdoor unit.
Open the stop valves of the outdoor unit to start
the ow of the refrigerant between the indoor and
outdoor unit.