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
I
NSTALLING THE INDOOR UNIT
O
x
x
x
x
x
x
x
MH026FPEA IM_E_20238 1/24/05 5:25 PM Page 12
