6.5. Pipeline connection
1. Flare
1) Use a pipe cutter to cut off the pipe (See Fig.6-4)
2) Pull the pipe into the rear flare of the connective nut. (Refer to Table: 6-5)
Table: 6-5
Outer
diameter
(mm)
A (mm)
Max. Min.
Φ6.4 8.7 8.3
Φ9.5 12.4 12.0
Φ12.7 15.8 15.4
Φ15.9 19.0 18.6
Φ19.1 23.3 22.9
2. Tighten the nut
Align with the connective pipe, screw up the connection pipe nut manually, and
use a spanner to tighten it as shown in Fig.6-5.
CAUTION
Make sure you use the correct torque when tightening the flare nut. Use the
table below for guidance on tightening.
Table: 6-6
Pipe size Tightening torque N.m
Φ6.4 14.2~17.2
Φ9.5 32.7~39.9
Φ12.7 49.5~60.3
Φ15.9 61.8~75.4
Φ19.1 97.2~118.6
CAUTION
6.6. Welding the copper pipe
Use braze-welding for the low pressure gas pipe, high pressure gas pipe, liquid
pipe which connected with SBOX and the outdoor unit.
CAUTION
During brazing, ensure you use cool gel on brass connections. If not used,
the brass will deform and leak.
● During welding, use nitrogen gas to protect welding.
6.7. Airtight test
CAUTION
Don’t use the refrigerant of the outdoor unit to do the vacuum.
Slant
Coarse
Burr
90
90°±4
45°±2
R0.4~0.8
A
Gas pipe(Flare) Liquid pipe(Flare)
Protect with wet
towel when brazing
Pipe connection from outdoor unit
Low pressure gas pipe
connection(Brazing)
High pressure gas pipe
connection(Brazing)
Liquid pipe connection(Brazing)
Pipe connection to intdoor unit
Fig.6-4
Fig.6-5
Fig.6-6
CLIMATE 5000 VRF 6720862460 (16/04)
INSTALL THE CONNECTING PIPE | 9
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