E-
12
7.5 metres of piping is supplied with the air conditioner(Optional).
This length can if necessary be:
◆ Extended to a maximum length
◆ Shortened as required
☛ If more than 7.5 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.
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.
Outer Diameter(D) Depth(A)
6.35 mm 1.3 mm
9.52 mm 1.8 mm
12.70 mm 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.
Outer Diameter Torque(kgf•cm)
6.35 mm 140~170
9.52 mm 250~280
12.70 mm 380~420
7 For further details on how to connect up to the outdoor unit and purge the
circuit, refer to installation manual of the outdoor unit.
Cutting/Extending the Piping
90
O
INSTALLING THE INDOOR UNIT
Ox x x
xx xx
MH026FPEA IM_E_20238 1/24/05 5:25 PM Page 12
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