E-
12
INSTALLING THE
INDOOR UNIT
Cutting/Extending the Piping
16.5ft(5m) of piping is supplied with the air conditioner(Optional).
This length can if necessary be:
◆ Extended to a maximum of ‘L’ ft/m
◆ Shortened as required
☛ If more than 16.5ft(5m) of piping is required:
◆ The assembly cable must also be extended
◆ Refrigerant must be added to the circuit by an approved
installer; otherwise, the indoor unit may freeze
1 Make sure that you have the required tools available
(pipe cutter, reamer, flaring tool and pipe holder).
2 If you wish to shorten the piping, cut it using a pipe cutter, taking care to ensure that
the cut edge remains at a 90° angle with the side of the pipe, and referring to the
illustrations below for examples of edges cut correctly and incorrectly.
Oblique Rough Burr
3 To prevent any gas from leaking out, remove all burrs at the cut end of the
pipe, using a reamer.
4 Slide a flare nut on to the pipe and modify the flare.
Pipe Outer Diameter (D) Depth (A)
Liquid refrigerant
inch(
6.35 mm)
inch(
1.3 mm)
Gas refrigerant
inch(
9.52 mm)
inch(
1.8 mm)
Gas refrigerant
inch(
12.70 mm)
inch(
2.0 mm)
5 Check that the flaring is correct, referring to the illustrations below for
examples of incorrect flaring.
Inclined Damaged Surface Cracked Uneven Thickness
6 Align the pipes to be connected and tighten the flare nuts first manually
and then with a torque wrench, applying the following torque.
7 For further details on how to connect up to the outdoor unit and purge the
circuit, refer to page 17.
Ox x x
xxxx
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16
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16
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16
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Pipe Outer Diameter Torque
Liquid refrigerant inch(6.35 mm) 10.1~12.3ft•lb(140~170kgf•cm)
Gas refrigerant inch(9.52 mm) 18.1~20.3ft•lb(250~280kgf•cm)
Gas refrigerant inch(12.70 mm) 27.5~30.4ft•lb(380~420kgf•cm)
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