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3 - INSTALLATION OF THE UNIT
3.1 - Installing the unit in the false
ceiling
The positioning of the unit must not create an obstacle
that may lead to an unequal distribution and/or return
flow of the air. The ceiling must be sufficiently even to
allow a simple installation without danger from the unit.
The supporting structure must be able to carry the unit
weight and prevent deformation, breaks or vibrations
during operation.
INSTALLATION PRECAUTIONS: During the
installation process, remove all debris and
construction material from the ducts to prevent any
damage to the unit.
3.2 - Installation procedure
NOTE: The fan-coil units are delivered upside down
when stacked on a pallet.
■ Position the unit close to where it is to be installed in
the ceiling void. For installation in a false ceiling use
a hydraulic lift and a folding ladder to make the task
easier (Fig. 7).
■ Check that the clearances around the unit are
sufficient to allow easy maintenance. Please refer to
the diagram that shows the service clearances.
Wiring diagram for connecting several units
Incorrect wiring for several units
F4
■ Mark the position of the threaded hangers on the
ceiling (if several units need to be installed, it may
be advisable to produce a drilling template). The
method of fixing the threaded hangers (not supplied
by Carrier) depends on the ceiling type (maximum
diameter of the threaded hangers is 10 mm). Once
the threaded hangers are fixed to the ceiling, tighten
the first nuts.
WARNING: When moving the units, do not use water
pipes, condensate drain pan, valves or flexible pipes
to lift them.
'Without filter' unit must be connected to an air
ductwork. It is not allowed to operate the unit
without any filter and with a free inlet at the same
time.
Lift the unit and align it on the threaded hangers, insert
the second nuts and tighten them slightly.
NOTE: At this point do not tighten the nuts fully and
do not clamp the unit up to the ceiling (leave a space
between the ceiling and the unit). The nuts will be
adjusted finally, when the unit has been connected
to the pipework and ducts and levelled.
Level the unit (Figs. 8 and 9).
Adjust the hanger nuts so that the unit is inclined 0.5%
towards the condensate drain pan. In the other direction
(air flow direction) the unit must be perfectly level (Figs.
8 and 9).
Correct wiring for several units
N
L
N
L
N
L
15
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