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Installation Procedure
3 To prevent any gas from leaking out, remove all burrs
at the cut edge of the pipe, using a reamer.
4
D
Pipe
Flare
Outer diameter (D)
ø 6.35 mm
ø 9.52 mm
ø 12.70 mm
ø 15.88 mm
ø 19.05 mm
5
Correct
Inclined
CAUTION
• If the pipes require brazing ensure that OFN(Oxygen
Free Nitrogen) is flowing through the system.
• Nitrogen blowing pressure range is 0.02 to 0.05 MPa.
18
English
R 0.4 to 0.8 mm
L
Flare
Depth (A)
Flare dimension (L)
1.3 mm
8.7 to 9.1 mm
1.8 mm
12.8 to 13.2 mm
2.0 mm
16.2 to 16.6 mm
2.2 mm
19.3 to 19.7 mm
2.2 mm
23.6 to 24.0 mm
Damaged
Cracked
Uneven
Surface
Thickness
Step 7 Installing oil traps
Check the following list and install an oil trap.
• Based on cooling operation, install it on the gas side
pipe only.
• Install the oil trap only in between the outdoor unit
and the first branch joint and it should be installed at
every 10 m.
D
• Radius of curvature (R) on the oil trap are as follows;
Pipe
diameter
12.70 15.88 19.05 22.23 25.40 28.60 31.75
(D, mm)
Radius of
25 and
32 and
curvature
over
over
(R, mm)
•
• When the indoor unit is installed at a higher place than
the outdoor unit
Outdoor Unit
38 and
41 and
51 and
57 and
over
over
over
over
Indoor Unit
R
Oil trap (Install it at
H
every 10 m)
60 and
over
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