FILE NO. SVM-02003
– 39 –
Outer dia.
of copper pipe
Rigid
1.0 to 1.5
1.0 to 1.5
1.5 to 2.0
0.5 to 1.0
0.5 to 1.0
0.5 to 1.0
Imperial
A
8-5-2. Refrigerant Piping Connection
1. Cut the pipe with a pipe cutter.
Fig. 8-5-2
2. Insert a flare nut into the pipe, and flare the pipe.
•
Projection margin in flaring : A (Unit : mm)
Fig. 8-5-3
<Tightening connection>
Align the centers of the connecting pipes and tighten
the flare nut as far as possible with your fingers. Then
tighten the nut with a spanner and torque wrench as
shown in the figure.
CAUTION
•
Do not apply excess torque.
•
Otherwise, the nut may crack depending on the
conditions.
90°
Roughness
Warp
Obliquity
A
Die
Pipe
•
Tightening torque of flare pipe connections
Fig. 8-5-4
For RAS-10UASX, RAS-07UAX-T2
Fig. 8-5-5
Fig. 8-5-6
Use a wrench to secure.
(Unit : N·m)
Flare nut
Half union
Use a torque wrench to tighten.
Externally
threaded side
CAUTION
•
KEEP IMPORTANT 4 POINTS FOR PIPING
WORK
(1) Take away dust and moisture (Inside of the
connecting pipes.)
(2) Tight connection (between pipes and unit)
(3) Evacuate the air in the connecting pipes using
VACUUM PUMP.
(4) Check gas leak (connected points)
Outer dia.
of copper pipe
∅
6.35 mm
∅
9.52 mm
∅
12.70 mm
Tightening torque
16 to 18 (1.6 to 1.8 kgf·m)
30 to 42 (3.0 to 4.2 kgf·m)
50 to 62 (5.0 to 6.2 kgf·m)
Flare at
indoor unit side
Flare at
outdoor unit side
Mark line
85 mm
∅
6.35
∅
9.52
∅
12.70
Internally
threaded side