112
1. Pre-installation
The installation location selected shall meet the following conditions and be approved by users.
• The strength shall be sufcient to withstand the weight of the valve box
• There is no signicant tilt on the plane.
• Ensure that there is enough space for installation and maintenance.as show in Fig.1
• There is space for inspection on the side and top of the electric box
• The length of piping between the indoor and outdoor units shall be within the permissible range (referring to the
specication attached to the outdoor unit).
• Please install the valve box in places where noise will not inuence the customers too much (such as washroom,
passageway, warehouse, equipment room, etc.). Places with high requirement for quiet are not suggested for
installation, such as bedroom, drawing room, meeting room, ofce, etc.
Note:
• the electrical box can be changed as show in 3 valve box installation.
• When starting up, stop, defrosting, and oil-returning in heating mode , the electronic expansion valve will veer and
create noise. This kind of noise is normal for the running of valve box.
• A noise may be emitted by the valve box as aresult of control during operation or stopping of an indoor unit. If it is
installed in the ceiling where it is exposed, take adequate precautions with the installation location.
<Notice item>
• Inspect whether the installation location can sufciently withstand the weight of valve box and set the hoisting
bolts by reinforcing the beam if necessary. Use hoisting bolts in installation (referring to 2 for the preparation
before installation).
• Install the power wiring and power line of the valve box at more than 1 m away from TV and radio to prevent the
image clutter and noise. But, there may be noise even if it is more than 1 m according to the different waves.
Valve box A B
112B Above 200 Above 200 (*1)
180B Above 200 (*2) Above 200 (*2)
280B Above 400 (*3) Above 400 (*3)
(*1) Ensure the maintenance area with more than 250 mm when the auxiliary pipe
-1, -2, -3 on page 4 is used.
(*2) Ensure the maintenance area with more than 400 mm when the auxiliary pipe -1, -2 on page 4 is used.
(*3) Ensure the maintenance area with more than 500 mm when the auxiliary pipe -2, -3 on page 4 is used.
valve box
Electrical
box
Outdoor unit side
(3 pipes)
Indoor unit side
(2 pipes)
Above
65mm
Above
50mm
Dooryard
AB
Manhole
must be
arranged on
the side of
the electrical
box
500mm
500mm
Fig.1
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