Advertisement
Use oil
Use frozen oil
Bend the pipe with thumb
Bend the pipe with thumb
■
Pipe Containment and Brackets.
• Ensure when installing pipe brackets and containment, you use
appropriate materials which comply with national regulations.
Failure to do so may result in damage or injury.
• Cover the connecting pipe and the cables together tightly
with tapes. Do not let air in, which will cause water leakage by
condensation.
• Pass the bound connecting pipe through the wall conduit from
outside. Be careful of the pipe location to do no damage to the
tubing.
4 Way Compact Cassette Type Indoor Unit
Fig.6-1
Make the ends
Make the ends
straight
straight
Fig.6-2
Make the ends
straight
REFRIGERANT PIPE CONNECTION | 9
7.
REFRIGERANT PIPE CONNECTION
7.1.
Expel The Air
■
Flaring
• Cut a pipe with a pipe cutter.
• Insert a flare nut into a pipe and flare the pipe.
90
90°±4
Table.7-1
Outside diameter
Ø6.4mm
Ø9.5mm
Ø12.7mm
Ø15.9mm
Ø19.1mm
■
Fasten the nut
• Put the connecting tubing at the proper position, tighten the
nuts with hands then fasten it with a wrench. (Refer to Fig.7-3)
• Too large a torque will harm the bellmouthing and too small
will cause leakage. Please determine the torque according to
Table.7-2.
Table.7-2
Tubing size
Ø6.4mm
Ø9.5mm
Ø12.7mm
Ø15.9mm
Ø19.1mm
• For pressure testing and vacuum testing, refer to outdoor
installation manual.
Lean crude burr
Lean
crude
burr
Fig.7-1
A
R0.4~0.8
Fig.7-2
A(mm)
Max
Min
8.7
8.3
12.4
12.0
15.8
15.4
19.0
18.6
23.3
22.9
Fig.7-3
Torque
14.2~17.2N.m
32.7~39.9N.m
49.5~60.3N.m
61.8~75.4N.m
97.2~118.6N.m
6720874427 (2017/04)
Advertisement
