Connect Pipes - Airwell CDMX-022N-09M25 User & Installation Manual

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)
torque (Unit: mm/Inch)
gauge
Min.
18-20 N.m
Ø 6.35 8.4/0.33
(183-204 kgf.cm)
25-26 N.m
13.2/0.52
Ø 9.52
(255-265 kgf.cm)
35-36 N.m
Ø 12.7 16.2/0.64
(357-367 kgf.cm)
45-47 N.m
19.2/0.76
Ø 16
(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.
Indoor unit tubing
3. Tighten the are nut as tightly as possible
by hand.
4. Using a spanner, grip the nut on the unit
tubing.
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
Pipe
Flare nut
5. While rmly gripping the nut, use a torque
wrench to tighten the are 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.
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.
Page 33
 