15
Piping Procedure
3. Connection of piping
Move the indoor tubing and drain hose to the hole.
□
Remove tubing holder and pull the tubing out of the chassis.
Replace the tubing holder into original position.
Route the tubing and the drain hose straight backwards.
Insert the xonnecting cable into the indoor unit through the hole.
□
Do not connecting the cable to the indoor unit.
□
Make a small loop with the cable for easy connection later.
Tape the tubing and the connecting cable.
Indoor unit installation.
Connecting the pipings to the indoor unit.
□ Align the center of the pipings and sufficiently tighten the flare nut
with fingers.
Finally, tighten the flare nut with torque wrench until the wrench
clicks.
□ When tightening the flare nut with torque wrench, ensure the
direction for tightening follows the arrow on the wrench.
Pipe
size
Tighten torque
A (mm)
Flare shape
ø6.35
1420~1720N.cm
(144~176kgf.cm)
8.3~8.7
R0.4~0.8
90°±0.5°
A
45°±2°
ø9.52
3270~3990N.cm
(333~407kgf.cm)
12.0~12.4
ø12.7
4950~6030N.cm
(490~500kgf.cm)
12.4~16.6
ø15.88
6180~7540N.cm
(630~770kgf.cm)
18.6~19.0
ø19.05 9720~11860N.cm
(990~1210kgf.cm)
22.9~23.3
If it is necessary (locally purchased) to bend or stretch the
tubing, use the spring which is attached to the tubing instead of
pipe bender.
□
Please make a careful notice to make a smooth line.
□
Hold the tubing with your two hands closely and then bend or
stretch it slowly not to make any crack.
□
Remember that the radius (R) should exceed 70mm. (Refer to
Fig.16)
Do not repeat the bending process to prevent the tubing from
cracking or crushing.
Keep in mind that the bending part should not be cracked and
make the radius (R) as long as possible. (Refer to Fig.17)
Indoor unit tubing
Torque wrench
Spanner
Spanner
R70mm
Fig. 15
Fig. 16
Fig. 17
Flare nut
Pipings
1)
2)
3)
4)
5)
6)
7)
1)
2)
3)
4. Precautions in bending
