Carrier 18K Installationshandbuch Seite 17

PIPING EXTENSION BEYOND FLARE FORM
Flare dimension (A)
(Unit: mm/Inch)
Pipe Tightening
gauge Torque
Min.
18-20 N.m
Ø 6.35 8.4/0.33
(183-204 kgf.cm)
25-26 N.m
Ø 9.52 13.2/0.52
(255-265 kgf.cm)
35-36 N.m
Ø 12.7 16.2/0.64
(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)
. Remove the flaring tool and flare form, then
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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.
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.
Flare shape
Max.
8.7/0.34
13.5/0.53
R0.4~0.8
16.5/0.65
19.7/0.78
23.7/0.93
26.9/1.06
Pipe
Flare nut
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")
. After connecting the copper pipes to the indoor
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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.
. Thread this pipeline through the wall and
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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 sure there is no refrigerant leak after
completing the installation work. If there is a refrigerant
leak, ventilate the area immediately and evacuate
the system (refer to the Air Evacuation section of this
manual).
Page 15-GB