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REFRIGERANT PIPE CONNECTION
C: Putting flare nut on
Remove flare nuts attached to indoor and
outdoor unit, then put them on pipe/tube
having completed burr removal (Note: It is not
possible to put them on after flaring work).
D: Flaring work
Carry out flaring work using flaring tool as
shown below.
Firmly hold copper pipe in a die according
to the dimension shown in the table below.
Outer diam.
(mm)
6.35
9.53
12.7
12.7
16.0
Tightening Connection
Align the center of the pipes.
Sufficiently tighten the flare
nut with fingers, and then tighten
it with a spanner and torque wrench
as shown.
Caution
Excessive torque can break nut
depending on installation conditions.
A(mm)
Max.
Min.
1.3
0.7
1.6
1.0
1.8
1.8
1.0
1.0
2.4
2.2
Indoor unit tubing
Flare nut
Copper tube
Bar
Copper pipe
Clamp handle
Flare nut
Pipings
Fig.19
Outer
Tightening
diam.
torque (Kg.m)
1.6
6.35
9.53
3.0
5.0
12.7
16.0
7.5
11
Fig.17
Handle
Bar
Yoke
Cone
Red arrow mark
Fig.18
Additional tightening
torque (Kg.m)
2.0
3.5
5.5
8.0
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