E-11
ENGLISH
Cutting or Extending the Pipe
A 24.6ft (7.5m) pipe is supplied with the air conditioner. (optional)
The length of the pipe can be:
Extended up to “A”
Shortened as required
If you need a pipe longer than 24.6ft (7.5m):
You must extend the assembly cable.
For further details on how much refrigerant(R410A) should be
added, refer to Page 13.
1
Make sure that you have the required tools (pipe cutter, reamer, flaring tool
and pipe holder.)
2
If you want to shorten the pipe, cut it using a pipe cutter, ensuring that the cut
edge remains at 90° with the side of the pipe (see examples of correctly and
incorrectly cut edges below.)
Oblique Rough Burr
3
To prevent a gas leak, remove all burrs at the cut edge of the pipe using a
reamer.
4
Put a flare nut slightly into the pipe and modify the flare.
Outer Diameter (D)
Depth (A)
1/4 inch (6.35mm)
0.05 inch (1.3mm)
3/8 inch (9.52mm)
0.07 inch (1.8mm)
1/2 inch (12.80mm)
0.08 inch (2.0mm)
5/8 inch (15.88mm)
0.09 inch (2.2mm)
5
Check if you flared the pipe correctly (see examples of incorrectly flared pipes
below.)
Inclined Damaged Surface Cracked Uneven Thickness
6
Align the pipes to connect them easily. Tighten the flare nuts first with your
hands, and then with a torque wrench, applying the following torque:
Outer Diameter Torque
1/4 inch (6.35mm)
10.1~12.3ft
•
lb (140~170 kgf
•
cm)
3/8 inch (9.52mm)
18.1~20.3ft
•
lb (250~280 kgf
•
cm)
1/2 inch (12.80mm)
27.5~30.4ft
•
lb (380~420 kgf
•
cm)
5/8 inch (15.88mm)
31.8~34.7ft
•
lb (440~480 kgf
•
cm)
Excessive torque can be cause of gas leakage.
In case brazing the pipe, the nitrogen gas must be blown into the pipe (50
Pa). The joint must be accessible and serviceable.
7
For further details on how to connect to the outdoor unit and purge the air,
refer to page 13.
installing the air condtioner
Model “A”
AQV09N
AQV12N
49.2ft(15m)
AQV18N
AQV24N
98.4ft(30m)
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