INSTALLING THE AIR CONDTIONER
Cutting or Extending the Pipe
A
The length of the pipe can be:
Extended up to : see table page 5
Shorten up to: see page 5
CAUTION If you need a pipe longer than 5 meters: You must extend the assembly cable.
You must add refrigerant to the pipes; otherwise, the indoor unit may freeze.
1Make sure that you have all the required tools (pipe cutter, reamer, flaring tool and pipe holder).
Pipe cutter
Pipe
2If 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 below examples of correct and incorrect cut edges).
ObliqueRoughBurr
3To prevent a gas leak, remove all burrs at the cut edge of the pipe using a reamer.
CAUTION Face the pipe down while removing the burrs to make sure that burrs do not get in to the pipe.
Pipe
Flare
Flare nut
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Indoor |
| outlet pipe |
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| Connecting pipe | |||
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4Put a flare nut slightly into the pipe and modify the flare.
Outer Diameter (D) | Depth (A) | Flaring Size (B) |
ø6.35 mm | 1.3 mm | 9.0 mm |
ø9.52 mm | 1.8 mm | 13.0 mm |
ø12.70 mm | 2.0 mm | 16.2 mm |
ø15.88 mm | 2.2 mm | 19.3 mm |
ø19.05 mm | 2.2 mm | 22.5 mm |
ø22.23 mm | 2.2 mm | 25.7 mm |
5Check if you flared the pipe correctly (see examples of incorrectly flared pipes below).
Correct | Inclined | Damaged | Cracked | Uneven |
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| Surface |
| Thickness |
6Align 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 (kgf•cm) |
ø6.35 mm | 140~170 |
ø9.52 mm | 250~280 |
ø12.70 mm | 380~420 |
ø15.88 mm | 440~480 |
ø19.05 mm | 990~1210 |
ø22.23 mm | 990~1210 |
Note 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.
7For further details on how to connect to the outdoor unit and purge the air, refer to page 18.
CAUTION
Tighten the flare nut with torque wrench according to specified method.
If the flare nut is
_IM_30271A_E_11.07.09.indd 14