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Five metres of piping is supplied with the air conditioner(Optional).
This length can if necessary be:
◆ Extended to a maximum of ten metres
◆ Shortened as required
☛ If more than five metres 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.
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 6.35 mm
(1/4")
1.3 mm
(5/100")
Gas refrigerant 9.52 mm
(3/8")
1.8 mm
(7/100")
Gas refrigerant 12.70 mm
(1/2")
2.0 mm
(8/100")
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 wrench, applying the following torque.
Pipe Outer Diameter Torque (kg•cm)
Liquid refrigerant 6.35 mm (1/4") 160 (11 ft•lb)
Gas refrigerant 9.52 mm (3/8") 300 (21 ft•lb)
Gas refrigerant 12.70 mm (1/2") 500 (36 ft•lb)
7 For further details on how to connect up to the outdoor unit and purge the
circuit, refer to page 41.
Cutting/Extending the Piping
90
INSTALLING THE INDOOR UNIT
Ox
Oblique Rough Burr
xx
5
3
4
3
5
2
E-
35
ENGLISH