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PACKING
The fan coils are shipped in standard packaging and are
protected by expanded polystyrene and cardboard.
UNIT INSTALLATION
Free access to the base unit must be avoided by using the
appropriate means, which is netting or protective grilles,
conforming to UNI EN 294.
The fan coil must be installed in a position that will allow
easy access for routine (cleaning of the filter) and extraor-
dinary maintenance, as well as access to the air release
valves and the input and output tubes for emptying the
water in the exchange coil on the unit.
The installation point must be chosen so that the minimum
and maximum ambient temperatures of 0 - 45 °C are
respected (< 85 % R.H.).
Before performing any maintenance intervention protect
yourself with the proper safety equipment.
To install the unit proceed as follows:
a) For ceiling mounting use the expansion bolts (not sup-
plied) as indicated in Fig. 5.
b) Perform the hydraulic connections. The position and the
diameter of the hydraulic connections are reported with
the dimensional data.
It is recommended that the water piping be properly insu-
lated to avoid dripping during the cooling operation.
c) Apply the integral condensate drip tray BCL 10.
The condensate discharge system must be correctly mea-
sured and the piping positioned in a way that will main-
tain an adequate inclination for the entire distance (min.
1%). If draining into the sewer system, the implementa-
tion of a siphon is recommended which prohibits the
return of unpleasant odors into the rooms.
d) Perform the electrical connections according to that
reported in the wiring diagrams and in the dedicated
chapter. For access to the unit terminal strip remove the
closing panel of the electrical box.
e) Remount the closing panel of the electrical box.
f) Apply the accessories.
g) Connect the fan coil to the air intake and delivery ducts.
ELECTRICAL CONNECTIONS
Warning: before performing any maintenance intervention
protect yourself with the proper safety equipment.
Warning: before performing any maintenance intervention,
make sure that the power supply is disconnected.
WARNING: the electrical connections, the installation of
the fan coils and their accessories must only be done by
qualified individuals possessing the technical-professional
requirements for the installation, trasformation, expansion
and maintenance of the plants and able to verify the func-
tion and safety of these.
In the specific case of electrical connections, the following
must be checked:
- Measurement of the isolation resistance of the electrical
system.
- Testing of the continuity of protection conductors.
CONNECTION CABLE CHARACTERISTICS
Use type H05V-K or N07V-K cables with 300/500 V insula-
tion routed in either a tube or cable duct.
All the cables must be routed in either a tube or cable duct
so that they are not inside the fan coil.
The cables exiting the tube or cable duct must be positioned
in such a way as not to undergo traction or twisting stresses
and at any rate protected from external agents.
Stranded wires can only be used if fitted with end termi-
nals. Make sure that all strands are securely inserted in the
terminals.
Stranded wires can only be used if fitted with end terminals.
Make sure that all strands are securely inserted in the terminals.
For all the connections follow the wiring diagrams accom-
panying the device and shown in this documentation.
In order to protect the unit from short-circuits, mount an
omnipolar thermal-magnetic switch 2A 250V (IG) to the
power supply line with a minimum opening distance of 3 mm
between the contacts.
Each control panel can only control one fan coil.
Never mount the control panel on a metal wall unless it is per-
manently grounded.
The control panels are composed only of electric circuits con-
nected to the 230V mains; all the probes and commands must
therefore be insulated in correspondence to this voltage.
By choosing the proper connections on the unit terminal strip,
three selectable speeds of operation of the five available are
enabled.
The SW minimum water temperature probe for PXA E and
PXA R, to be positioned on the delivery tube, can automatical-
ly stop the fan if the input water temperature to the coil goes
below 39°C.
If the three-way valve is installed, the minimum water tempe-
rature probe must be placed on the delivery tube upstream
from the valve.
WARNING: THE PROBE IS DOUBLE INSULATED BECAU-
SE IT IS SUBJECT TO A VOLTAGE OF 230V AC.
The multifunctional electronic thermostats are supplied
ready to operate in the standard configuration, but allow the
installer to adapt to the specific needs of the plant by adju-
sting the internal Dip-Switch.
The personalized functions can vary from model to model,
for this we recommend that you consult the relative
manuals.
Warning: check that the installation has been performed
correctly. For PXA E and PXA R it is necessary to run the
Autotest to check that the fan unit, the valves and the hea-
ter are all operating correctly.
COIL ROTATION
If, for reasons of hydraulic installation, the coil should be
rotated. Proceed as follows:
- remove the zinc plated sheet upper closure that is fastened
with 4 screws.
- remove the screws that fasten the coil (4 screws per side);
- unthread the coil upwards;
- rotate the coil;
- reposition the coil in the unit;
- fasten the coil with the screws;
- remount the upper closure and fasten it with the screws,
respecting
GB
9
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