English
11
• To prevent dust, moisture or other foreign matter from infiltrating the tube, either pinch the end or cover
it with tape.
•
Do not allow anything other than the designated refrigerant to get mixed into the refrigerant circuit, such
as air, etc. If any refrigerant gas leaks while working on the unit, ventilate the room thoroughly right away.
Torque wrench
Spanner
Pipe union
Flare nut
Fig. 14
•
The outdoor unit is charged with refrigerant.
•
Be sure to use both a spanner and torque wrench together, as shown in
the Torque wrench drawing, when connecting or disconnecting pipes to/
from the unit.
(Refer to Fig. 14)
• Refer to “Table 1” for the dimensions of flare nut spaces.
• Use the flare nut included with the unit main body. Spanner
Coat here with ester or ether oil.
Fig. 15
• When connecting the flare nut, apply ester oil or ether oil to the flare
section (inside only), and spin 3-4 times before screwing in.
(Refer to Fig. 15)
CAUTION
•
Do not let oil get on the screw holders on the pipe holding plate. Oil can weaken the screw holders.
•
Refer to “Table 1” to determine the proper tightening torque.
• Be careful not to damage the flare section.
Table 1
Flare
Flare dimensions
A (mm)
Tightening torque (N·m)
Pipe size
A
R0.4-0.8
12.8 – 13.2
32.7 – 39.9
Ф 9.5 (3/8”)
19.3 – 19.7
61.8 – 75.4
Ф 15.9 (5/8”)
CAUTION
• Over-tightening the flare nut may break it and/or cause the refrigerant to leak.
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:
Unless followed the tightening instruction (it is loose tightening), it will lead to the refrigerant leakage (slow
leak) and the device malfunction (it does not sufficiently cool or heat).
Recommended arm length of tool
Further tightening angle
Pipe size
Approx. 200mm
60 to 90 degrees
Ф 9.5 (3/8”)
Approx. 300mm
30 to 60 degrees
Ф 15.9 (5/8”)
45°±2°
90°±2°
