IOM SYSPLIT DUCT R32

Refrigerant piping
Connection
5. Clamp are form on the end of the pipe.
The end of the pipe must extend beyond
the are form.
Flare form
Pipe
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
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
Flare nut Pipe
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.
NOTE: Use both a spanner and a torque wrench
when connecting or disconnecting pipes to/from
the unit.
Pipe
gauge
Tightening
torque
Flare dimension (A)
(Unit: mm/Inch)
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
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.
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