33
Installation
The standard installation of the water heating coil is made by
positioning the connection manifolds on the same side as the
motor of the evaporator unit. If necessary, it can be connected
to the opposite side. In this case the coil must be turned by 180°.
The installation sequence is as follows:
a. Disconnect the power supply to the unit.
b. Remove the side access panels.
c. Loosely screw in the 4 screws provided to attach the
heating coil to the headers of the evaporator coil (leaving
a free space of 3-4 mm untightened).
d. Install the heating coil, inserting the semi-attached screws
in the grooves of the headers.
e. Fix the 4 screws provided to attach the heating coil.
f. Install the perforated plate in the upper part of the coil,
covering the space that remains between the coil and the
unit top panel.
g. Connect heating coil sensor BT4 to terminals 39 and 40 of
the indoor unit terminal box, and from here to terminals
39 and 40 of the outdoor unit.
h. Change the position of dipswitch 3 on the main board AO
to position “ON”.
i. For water heating coils with a proportional valve an
extension board A2 must be installed and connected in
accordance with the wiring diagram for this option. In all
cases, both for the all-or-nothing control valve and for
the proportional valve the elctrical conections must be
made in accordance with the wiring diagram.
j. Install the blanking plate, supplied with the coil, on the cor-
responding side, after punching out the prepunched holes for
the entering and leaving water connections of the manifolds.
Table 11
Model Unit 015 025 030 031 040 045 055 065 075
6 kW Cooling only x
Heat pump x
12 kW Cooling only xxx
Heat pump xxxxx
15 kW Cooling only xx
Heat pump xxxx
18 kW Cooling only
Heat pump xxxx
18 (9+9) kW* Cooling only xx
Heat pump
24 (12+12) kW* Cooling only xxxx
Heat pump
* 2-stage heating
Fig. 26
Electric resistance heaters
This option/accessory consists of a frame with shielded electric
heaters and a control box, incorporated in the same frame, with
all electrical and protection components required to guarantee
total safety. For the available capacities see Table 11.
Fig. 27
Installation
The standard installation of the electric heating coil is made by
positioning the control box on the same side as the motor of
the evaporator unit.
If necessary, it can be positioned on the opposite side. In this
case the coil must be turned by 180°.
VERY IMPORTANT: If the coil is installed on the opposite side,
it is NECESSARY to change the position of the two thermal
protectors to the opposite longitudinal beam, i.e. the thermal
protectors must always be positioned in the upper part of the
coil.
The installation sequence is as follows:
a. Disconnect the power supply to the unit.
b. Remove the side access panels.
c. Loosely screw in the 4 screws provided to attach the
electric heater to the headers of the evaporator coil
(leaving a free space of 3-4 mm untightened).
d. Install the electric heater, inserting the semi-attached
screws in the grooves of the headers.
e. Fix the 4 screws provided to attach the electric heater.
f. Make all electrical connections in accordance with the
wiring diagram supplied with this option.
g. Install the blanking plates in their correct positions.
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