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4. Remove PVC tape from ends of pipe when
ready to perform flaring work.
5. Clamp flare form on the end of the pipe. The
end of the pipe must extend beyond the flare
form.
Flare form
6. Place 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 .
PIPING EXTENSION BEYOND FLARE FORM
Tightening
Flare dimension (A)
Tubing
torque
(Unit: mm/Inch)
diameter
Min.
18-20 N.m
8.4/0.33
Ø 6.35
(183-204 kgf.cm)
25-26 N.m
13.2/0.52
Ø 9.5
(255-265 kgf.cm)
35-36 N.m
16.2/0.64
Ø 12.7
(357-367 kgf.cm)
45-47 N.m
Ø 15.9
19.2/0.76
(459-480 kgf.cm)
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 it to the outdoor unit. You should
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.
Pipe
Flare shape
Max .
90 ° ± 4
8.7/0.34
A
13.5/0.53
R0.4~0.8
16.5/0.65
19.7/0.78
Indoor unit tubing
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 above table.
NOTE: Use both a spanner and a torque
wrench when connecting or disconnecting
pipes to/from the unit.
CAUTION
Ensure 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.
Pipe
Flare nut
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