Toshiba RAS-10GKHP-E Service Manual page 46

8-5-2. Refrigerant piping connection
1. Cut the pipe with a pipe cutter.
90°
Fig. 8-5-2
2. Insert a flare nut into the pipe, and flare the pipe.
• Projection margin in flaring : A (Unit : mm)
Die
Fig. 8-5-3
Outer dia.
of copper pipe
Rigid
6.35 0.5 to 1.0
9.52 0.5 to 1.0
<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.
Roughness
Warp
Obliquity
A
Pipe
A
Imperial
1.0 to 1.5
1.0 to 1.5
Outer dia.
of copper pipe
∅6.35
∅9.52
• Tightening torque of flare pipe connections
Half union
Externally
threaded side
Use a wrench to secure.
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)
− 45 −
FILE NO. SVM-06037
(Unit : N·m)
Tightening torque
16 to 18 (1.6 to 1.8 kgf·m)
30 to 42 (3.0 to 4.2 kgf·m)
Flare at indoor unit side
Flare at outdoor unit side
Fig. 8-5-4
Mark line
Fig. 8-5-5
Flare nut
Internally
threaded side
Use a torque wrench to tighten.
Fig. 8-5-6