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Installation Procedure
Step 7 Optional: Cutting and flaring
the pipes
1 Make sure that you have the required tools available.
(pipe cutter, reamer, flaring tool, and pipe holder)
2 If you wish to shorten the pipes, cut it with a pipe
cutter, taking care to ensure that the cut edge remains
at a 90° angle with the side of the pipe. Refer to the
illustrations below for examples of edges cut correctly
and incorrectly.
Pipe cutter
90°
Pipe
3 To prevent any gas from leaking out, remove all burrs
at the cut edge of the pipe, using a reamer.
4 Slide a flare nut on to the pipe and modify the flare.
D
Pipe
Flare
Outer Diameter
(D)
mm
inch
mm
Ø6.35
1/4
1.3
Ø9.52
3/8
1.8
Ø12.70
1/2
2.0
Ø15.88
5/8
2.2
Ø19.05
3/4
2.2
20
English
DB68-11274A-00_IM_CAC Universal Outdoor_AA_EN.indd 20
DB68-11274A-00_IM_CAC Universal Outdoor_AA_EN.indd 20
Oblique
Rough
R 0.016 to 0.032 inch
A
(0.4 to 0.8 mm)
L
Flare
Depth (A)
Flare dimension (L)
inch
mm
inch
0.051
8.7 to 9.1
0.34 to 0.36
0.071
12.8 to 13.2
0.50 to 0.52
0.079
16.2 to 16.6
0.64 to 0.65
0.087
19.3 to 19.7
0.76 to 0.78
0.087
23.6 to 24.0
0.93 to 0.94
5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
1
2
Correct
Inclined
CAUTION
• Keep the piping length at a minimum to minimize the
Burr
additional refrigerant charge due to piping extension.
• When connecting the pipes, make sure that
surrounding objects do not interfere with or contact
them to prevent refrigerant leakage due to physical
damage.
• Make sure that the spaces where the refrigerant pipes
are installed comply with national gas regulations.
• Be sure to perform works such as additional
refrigerant charging and pipe welding under the
D
conditions of good ventilation.
• Be sure to perform welding and piping works for
mechanical connections under the conditions that the
refrigerant does not circulate.
• When reconnecting the pipes, make sure to perform
flared-jointing newly to prevent refrigerant leakage.
3
Damaged
Cracked
Uneven
surface
thickness
2021-09-14 오전 9:21:59
2021-09-14 오전 9:21:59
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