Electrical Connections; Replacing The Lamps - AERMEC FHX Serie Manual De Instrucciones

ELECTRICAL CONNECTIONS

To protect the unit against short circuits,
fit an omnipolar magneto-thermal trip
2A 250V (IG) to the power line with a
minimum contact opening distance of 3
mm.
Connection wire characteristics:
Use H05V-K or N07V-K type cables
with 300/500 V with insulation, piped or
ducted.
All the cables must be piped or ducted
until they are inside the fan coil.
The cables coming out of the pipe or duct
must not be subject to stretching or twist-
ing. They must be protected from external
agents.
Stranded wires can only be used with
terminating sleeves. Make sure that the
strands of the wires are inserted properly.
Wiring diagrams are constantly updated.
It is therefore compulsory to refer to the
ones supplied with the unit.
Each control panel can control a single
fan coil.
The control panel may not be fitted on
a metal wall unless this is permanently
connected to an earthed outlet.
The control panels consist simply of electric

REPLACING THE LAMPS

Germicidal lamps are available as a spare
part from Aermec Technical Service
Centres.
Make sure that the lamp is the same model as
the one you are replacing; it is strictly prohib-
ited to use lamps of different sizes.
DANGER! Before performing any mainte-
nance procedures requiring access to the
internal parts of the fan coil, cut off the
power supply in order to avoid exposure
to the light emitted by the lamp. Never let
yourself come into direct contact with the
light produced by the lamp, as the UVC
radiation may cause serious eye and skin
irritation.
WARNING! Before starting to replace the
lamp, cut off the power supply to the unit.
Restore the power supply only once the
lamp replacement procedure is complete.
Non-observance of this guideline may
cause the device to malfunction. If, after
the lamp has been replaced, the germi-
cidal lamp does not switch on because
the correct procedure was not observed,
cut off the power supply for at least 10
minutes and disconnect/reconnect the
germicidal lamp to restore normal opera-
tion.
The lamp must be replaced every year so
as to ensure the germicidal action remains
constant.
ADVICE!
- Use suitable personal protection.
- Handle the germicidal lamp with
extreme caution, as it is fragile and
contains mercury vapours.
- Observe current disposal legislation.
- Do not touch the glass surface of the
germicidal lamp with your bare hands; if
this should happen, use a clean cloth and
isopropyl alcohol to remove the dirt acci-
18
circuits connected at the mains voltage of 230
V; all the inputs for the sensors and controls
must therefore be correspondingly insulated
for this voltage.
The PXAI control panel is fitted with a
room temperature sensor and a water
temperature sensor.
The PXAE control panel is fitted with
a room temperature sensor; the water
temperature sensor is available as a SW3
accessory.
The minimum water temperature probe
makes it possible to stop the ventilation
automatically if the temperature of the
input water to the coil falls below 39°C.
In installations with a three way valve, the
minimum water temperature sensor must be
relocated from its standard mounting in the
coil assembly to the delivery hose upstream
of the valve. When relocating the water
temperature probe, the standard sensor must
be replaced with a SW3 sensor accessory,
fitted with a cable of suitable length.
WARNING:the sensor is fitted with
double insulation because it is subject
to a voltage of 230 Vac.
When using control panels at a distance
in conjunction with the fan coils, the
dentally deposited on the glass.
To replace the lamp, proceed as follows:
- Disconnect the unit from the power
supply.
- Remove the lamp holder by turning it in
an anti-clockwise direction, then remove
it from its slot.
- Slide the lamp out of the fan coil until
the power supply cable of the lamp may
be disconnected.
- Remove the lamp from the fan coil
completely.
- Replace the lamp, taking care not to
corresponding electrical diagram must
be observed.
For FHX-UV version fan coils (size
between 22 and 50), connect the wires
(already fitted inside the casing) for the
MS microswitch controlling the opening
of the air delivery grille to the MS termi-
nals on the control panel.
The PXAI and PXAE multifunctional elec-
tronic thermostats must be made suit-
able for the specific requirements of the
system using the internal Dip-Switches.
For FHX fan coils with germicidal lamp,
the following parameters must be set:
SW2, Dip1 and Dip2 in the ON position.
In the wall/ceiling-mounted versions with
boosted motor (PO), you can activate
operation at the three speeds that can
be selected from the seven available by
choosing the relevant connections on the
control board fitted to the motor.
WARNING:check whether the instal-
lation has been carried out correctly.
FOLLOW THE CHECKING PROCE-
DURES indicated in the control panel
manuals.
break it; the lamp should be disposed of
in accordance with local legislation.
- Fit the new lamp (the same model),
taking care not to touch the glass part with
your fingers.
- Replace the lamp holder.
- Connect the power cable of the lamp.
- Make a note of the germicidal lamp
replacement date on the data plate of the
unit.
- Finish refitting the fan coil.
- Restore the power supply to the unit.