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The flare nuts used must be those included with the main body.
• Refer to Table 1 for tightening torque.
Table 1
Pipe gauge
φ 6.4
14.2 – 17.2N·m (144 – 176 kgf·cm)
φ 9.5
32.7 – 39.9N·m (333 – 407 kgf·cm)
φ 12.7
49.5 – 60.3N·m (504 – 616 kgf·cm)
φ 15.9
61.8 – 75.4N·m (630 – 770 kgf·cm)
φ 19.1
97.2 – 118.6N·m (990 – 1210 kgf·cm)
Not recommendable but in case of emergency
You must use a torque wrench but if you are obliged to install the unit without a torque wrench, you may
follow the installation method mentioned below.
After the work is finished, make sure to check that there is no gas leak.
When you keep on tightening the flare nut with a spanner, there is a point where the tightening torque
suddenly increases. From that position, further tighten the flare nut the angle shown below:
Table 2
Pipe size
Further tightening angle
φ 6.4 (1/4")
60 to 90 degrees
φ 9.5 (3/8")
60 to 90 degrees
φ 12.7 (1/2")
30 to 60 degrees
φ 15.9 (5/8")
30 to 60 degrees
φ 19.1 (3/4")
20 to 35 degrees
7. DRAIN PIPING WORK
Rig the drain pipe as shown below and take measures against condensation. Improperly rigged piping could
lead to leaks and eventually wet furniture and belongings.
(1) Rig drain piping
• For drain work, rig the pipes so that they drain reliably.
• The drain pipe outlet direction can be chosen from the right rear, right, left rear, and left. Refer to
"REFRIGERANT PIPING WORK" for right rear and right direction, and refer to Fig. 20 for left rear and
left direction.
Rear side (metal plate)
removable part
• For left drain pipe outlet, remove the rubber plug and the insulation on the drain pipe connecting opening
on the left side of the unit and change the position to the right side.
English
Tightening torque
Recommended arm length of tool
Left-facing drain piping
Fig. 20
Flare dimension
A (mm)
8.3 – 8.7
12.0 – 12.4
15.4 – 15.8
18.6 – 19.0
22.9 – 23.3
Approx. 150mm
Approx. 200mm
Approx. 250mm
Approx. 300mm
Approx. 450mm
Rear left-facing drain piping
Left dressing board
removable part
Flare shape
R0.4-0.8
10
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