7
AP66000474 - 05
AREO
È severamente vietata la riproduzione anche parziale di questo manuale / All copying, even partial, of this manual is strictly forbidden
GB
Legend of wiring diagrams:
BK
Black, maximum speed of 230V 50 Hz motors
BU
Blue, medium speed of 230V 50 Hz motors
CD
Recess wall-mounted speed switch
CDE
wall-mounted speed switch
CN
Connecting terminal block
CST
star-triangle switch
F
Protective fuse (NOT SUPPLIED)
KP
Power interface
IL
Switch (NOT SUPPLIED)
IPM
Power interface
M
Motor
MICROD
wall-mounted microprocessor control panel
RD
Red, minimum speed of 230V 50 Hz motors
SW
Water temperature sensor for MICROD panel
TD
remote control panel (accessory)
TC
Winter fan stop thermostat for electromechanical control
WH
White, shared by 230V 50 Hz motors
If single-phase fan heaters are installed on a three-phase line,
they must be connected so as to ensure an equal distribution
over the 3 phases: this will ensure a balanced load.
7
CHECKS BEFORE STARTUP
- Check the tightness of the plumbing connections.
- Check the stability of the mounting brackets if the unit is installed on the
wall; the chains if the unit is ceiling mounted.
- Make sure that the wiring is firmly secured.
- Make sure that air has been eliminated from the heat exchanger.
- Adjust the louvers as desired and switch on the unit to check that it
works properly.
- Always make sure that the fan turns in the correct direction (ANTI-
CLOCKWISE viewing the fan heater from the rear, figure 17).
8
MAINTENANCE
The routine maintenance operations to be performed on
AREO
fan heaters
mainly regard the heat exchanger. It must be cleaned to eliminate dust
buildup, which tends to obstruct the spaces between the fins, resulting
in a decrease in the quantity of heat exchanged.
This job may be done using jets of compressed air.
If grease has also deposited you can wash the fins, taking care not to wet
the electric motor and making sure to dry the finned block thoroughly before
starting the fan heater.
It is recommended to carry out these operations at least once a year before
the start of the heating season.
The electric motor requires no maintenance as it is of the closed type with
self-lubricating bearings.
Every time you start up the unit after it has been off for a long time, make
sure no air is trapped in the heat exchanger.
Special care should be taken when carrying out maintenance work:
- some metal parts may cause injuries; wear protective gloves.
- maintenance may be performed exclusively by specialised personnel;
contact your dealer or installer.
- For safety reasons, before carrying out any maintenance or cleaning
jobs, put the main switch of the unit off to disconnect the power supply.
- If any work needs to be done on a unit that is working with hot water,
it is advisable to shut off the hot water (by means of the on-off valves)
and allow the fan to run for a few minutes until all the metal parts have
cooled down before carrying out any job on the fan heater.
Stop the fan and disconnect the unit from the power supply before
working on it.
9
TROUBLESHOOTING
If the unit is not working properly, before calling a service engineer carry
out the checks indicated in the table below.
If the problem cannot be solved, contact the dealer or service centre.
Problem
The fan heater does
not work at all
The fan heater
provides inadequate
heating (cooling)
The fan heater "leaks"
water.
Cause
1
No power supply
2
The motor overload
cutout has tripped
3
The main switch is on
o f f
1
An obstacle is
obstructing the air
intake or outlet
2
Air is trapped inside
the heat exchanger
3
The operating speed
selected is too low (3-
speed model)
1
Operation in 4-pole air
conditioning mode
2
Leaky plumbing
connections
3
Condensate drain
outlet clogged
Solution
1
Restore the power
supply
2
Contact a service
engineer
3
Switch on the power
supply
1
Remove the obstacle
2
Contact the installer
3
Select a higher speed
1
Select a lower speed
2
Contact a service
centre or your installer.
3
Contact a service
centre or your installer.