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5. Clamp are form on the end of the pipe.
The end of the pipe must extend beyond the are
form.
Flare form
6.
Place aring tool onto the form.
7.
Turn the handle of the aring tool clockwise
until the pipe is fully ared. Flare the pipe in
accordance with the dimensions.
PIPING EXTENSION BEYOND FLARE FORM
Pipe
Tightening
Flare dimension (A)
(Unit: mm/Inch)
gauge
torque
Min.
18-20 N.m
8.4/0.33
Ø 6.35
(183-204 kgf.cm)
25-26 N.m
Ø 9.52
13.2/0.52
(255-265 kgf.cm)
35-36 N.m
16.2/0.64
Ø 12.7
(357-367 kgf.cm)
45-47 N.m
Ø 16
19.2/0.76
(459-480 kgf.cm)
65-67 N.m
Ø 19
23.2/0.91
(663-683 kgf.cm)
75-85N.m
Ø 22
26.4/1.04
(765-867 kgf.cm)
8. Remove the aring tool and are form, then
inspect the end of the pipe for cracks and even
aring.
Step 4: Connect pipes
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.
1. When connecting the are nuts, apply a thin
coat of refrigeration oil to the ared ends of
the pipes.
2. Align the center of the two pipes that you will
connect.
3. Tighten the are nut as tightly as possible by
hand.
4. Using a spanner, grip the nut on the unit tubing.
5. While rmly gripping the nut, use a torque
wrench to tighten the are nut according to
the torque values in above table.
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
23.7/0.93
26.9/1.06
Page 38
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.
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 thumb
min-radius 10cm (3.9")
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 wires. While bundling these
items together, do not intertwine or cross
the signal cable with any other wiring.
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