Page 13
4. Remove the PVC tape from the ends of the
pipe when you're ready to perform the flaring
work.
5. Clamp the flare form on the end of the pipe. The
end of the pipe must extend beyond the flare
form.
Flare form
Pipe
Fig. 7.4
Refrigerant Piping
Connection
6.
Place the flaring tool onto the form.
7. Turn the handle of the flaring tool
clockwise until the pipe is fully flared. Flare
the pipe in accordance with the dimensions
shown in table 7.1.
T
able 7.1: PIPING EXTENSION BEYOND FLARE
FORM
Pipe
gauge
Tightening
torque
Flare dimension (A)
(Unit: in/mm)
Flare shape
Min.
Max
.
Ø 6.4
14.2-17.2 N.m
(144-176 kgf.cm)
0.3/8.3
0.3/8.3
R0.4~0.8
45
°±
2
90
°
±
4
A
Fig. 7.5
Ø 9.5
32.7-39.9 N.m
(333-407 kgf.cm)
0.48/12.4
0.48/12.4
Ø 12.7
49.5-60.3 N.m
(504-616 kgf.cm)
0.6/15.4
0.6/15.8
Ø 15.9
61.8-75.4 N.m
(630-770 kgf.cm)
0.7/18.6
0.74/19
Ø 19.1
97.2-118.6 N.m
(990-1210 kgf.cm)
0.9/22.9
0.91/23.3
8. Remove the flaring tool and flare form,
then inspect the end of the pipe for cracks
and even flaring.
Step 4: Connect pipes
Connect the copper pipes to the indoor unit first,
then connect them to the outdoor unit. First connect
the low-pressure pipe, then the high-pressure pipe.
1. When connecting the flare nuts, apply a thin
coat of refrigeration oil to the flared ends of
the pipes.
2. Align the center of the two pipes that you will
connect.
Indoor unit tubing
Flare nut
Pipe
Fig. 7.6
3. Tighten the flare nut as tightly as possible
by hand.
4. Using a spanner, grip the nut on the unit
tubing.
5. While firmly gripping the nut, use a torque
wrench to tighten the flare nut according to
the torque values in table 7.1.
NOTE:
Use both a spanner and a torque wrench
when connecting or disconnecting pipes to/from
the unit.
Fig. 7.7
CAUTION
•
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.
NOTE ON MINIMUM BEND RADIUS
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.
Bend the pipe with your thumb
min. radius 10 cm (3.9”)
Fig. 7.8
6. After connecting the copper pipes to the
indoor unit, wrap the power cable, signal
cable, and piping together with binding
tape.
NOTE:
When bundling these items together,
do not intertwine or cross the signal
cable with any other wiring.
7. Thread this pipeline through the wall and
connect it to the outdoor unit.
8. Insulate all the piping, including the valves
of the outdoor unit.
9. Open the stop valves of the outdoor unit to
start the flow of the refrigerant between
the indoor and outdoor units.
CAUTION
After completing the installation work, make sure
there is no refrigerant leak. If there is, ventilate
the area immediately and evacuate the system
(refer to the Air Evacuation section of this
manual).
Ø 22
109.5-133.7 N.m
(1117-1364 kgf.cm)
1.06/27
1.07/27.3
