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11
installation manual
6. Place flaring tool onto the form.
7. Turn the handle of the flaring tool clockwise until
the pipe is fully fla red. Flare the pipe in acco rdance
with the dimensions shown in table 8-2.
Table 8.2: PIPING EXTENSION BEYOND FLARE FORM
Pipe
gauge
Tightening
to rque
Fla re dimension (A)
(Unit: mm/Inch)
Fla re shape
Min. Max .
Ø 6.4
14.2-17.2 N.m
(144-176 kgf.cm)
8.3/0.3 8.3/0.3
R0.4~0.8
45
°
±
2
90
°
±
4
A
Fig. 8.5
Ø 9.5
32.7-39.9 N.m
(333-407 kgf.cm)
12.4/0.48 12.4/0.48
Ø 12.7
49.5-60.3 N.m
(504-616 kgf.cm)
15.4/0.6 15.8/0.6
Ø 15.9
61.8-75.4 N.m
(630-770 kgf.cm)
18.6/0.7 19/0.74
Ø 19.1
97.2-118.6 N.m
(990-1210 kgf.
cm)
22.9/0.9 23.3/0.91
8. Remove the flaring tool and fla re 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 it to the outdoor unit. You should first connect the
low-pressure pipe, then the high-p ressure pipe.
1. When connecting the fla re nuts, apply a thin coat
of refrigeration oil to the fla red ends of the pipes.
2. Align the center of the two pipes that you will
connect.
Indoor unit tubing
Flare nut
Pipe
Fig. 8.6
3. Tighten the fla re nut as tightly as possible by hand.
4. Using a spanne r, grip the nut on the unit tubing.
5. While firmly gripping the nut, use a to rque wrench
to tighten the fla re nut acco rding to the to rque
values in table 8.2.
NOTE: Use both a spanner and a to rque wrench when
connecting or disconnecting pipes to/f rom the unit.
Fig. 8.7
CAUTION
•
•
Ensure to wrap insulation a round the piping. Di rect
contact with the ba re piping may result in burns or
frostbite.
Make su re the pipe is p roperly 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 acco rding to the
diagram below. DO NOT bend the tubing mo re than
90° or mo re than 3 times.
B e nd t h e p ip e w it h t hu m b
mi n- ra diu s 10 cm (3.9) ”
Fig. 8.8
6. 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 wi res.
While bundling these items togethe r, do not intertwine
or cross the signal cable with any other wiring.
7. Thread this pipeline th rough 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 unit.
CAUTION
Check to make su re there is no refrigerant leak after
completing the installation work. If the re is a refrigerant
leak, ventilate the a rea 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)
27/1.06 27.3/1.07
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