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Refrigerant piping
Connection
Page 35
6.
Aer connecng 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.
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 connecng the flare nuts, apply a thin
coat of refrigeraon oil to the flared ends of
the pipes.
2.
Align the center of the two pipes that you will
connect.
3.
Tighten the flare nut as ghtly 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 ghten the flare nut according to
the torque values in above table.
NOTE: Use both a spanner and a torque wrench
when connecng or disconnecng pipes to/from
the unit.
CAUTION
•
Ensure to wrap insulaon around the piping.
Direct contact with the bare piping may
result in burns or frostbite.
•
Make sure the pipe is properly connected.
Over ghtening may damage the bell mouth
and under ghtening 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 mes.
Bend the pipe with thumb
min-radius 3.9”10cm (3.9”)
5.
Clamp flare form on the end of the pipe.
The end of the pipe must extend beyond the flare
form.
Flare form
Pipe
6.
Place flaring tool onto the form.
7.
Turn the handle of the flaring tool clockwise
unl the pipe is fully flared. Flare the pipe in
accordance with the dimensions.
PIPING EXTENSION BEYOND FLARE FORM
8. Remove the flaring tool and flare form, then
inspect the end of the pipe for cracks and even
flaring.
Pipe
gauge
Tightening
torque
Flare dimension
(A) (Unit: inch/mm)
Flare shape
Min. Max .
Ø 6.35
R0.4~0.8
45
°
±
2
90
°
±
4
A
Ø 9.52
Ø 12.7
Ø 16
Ø 19
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
Step 4: Connect pipes
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