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5. Clamp flare form on the end of the pipe.
The end of the pipe must extend beyond
the flare form.
Flare form
6. Place flaring tool onto the form.
7. Turn the handle of the flaring tool clockwise
until the pipe is fully flared.
PIPING EXTENSION BEYOND FLARE FORM
Flare dimension (A)
Pipe
Tightening
(Unit: mm/Inch)
gauge
torque
(mm)
Ø6.35
18-20 N.m
8.4/0.33
(1/4")
(13-15 ft lb)
Ø9.52
25-26 N.m
13.2/0.52 13.5/0.53
(3/8")
(18.5-19.5 ft lb)
Ø12.7
35-36 N.m
16.2/0.64 16.5/0.65
(1/2")
(25.5-26.5 ft lb)
Ø16
45-47 N.m
19.2/0.76 19.7/0.78
(5/8")
(33-34.5 ft lb)
Ø19
65-67 N.m
23.2/0.91 23.7/0.93
(3/4")
(48-49.5 ft lb)
Ø22
75-85 N.m
26.4/1.04 26.9/1.06
(7/8")
(55.5-62.5 ft lb)
8. Remove the flaring tool and flare form, then
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.
Pipe
Flare shape
Min.
Max.
8.7/0.34
90 ° ± 4
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.
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 the table.
NOTICE
Use both a spanner and a
torque wrench when connecting
or disconnecting pipes to/from
the unit.
A
R0.4~0.8
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.
Page 19
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