INSTALLATION AND SETTING INSTRUCTIONS
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FAN MOTOR CONTROL
In the electric panel there is an outlet for fan motor (MV) control.
If the applied electric load is lower than that shown in the table set forth hereunder, such outlet can be
used directly; otherwise it can be used to operate a relay and/or contactor.
Fan motor power - table:
TYPE
1-2-3-7-8-9
4-10
5-11
6-12
Power
kW
0,5
0,75
1,1
1,5
A paper version of the wiring diagram is included in the appliance. It is an integral part of these instructions
and we recommend keeping it carefully.
CHECKS
In order to ensure that the machine works properly, some basic parameters should be checked. Activate the
machine and:
•
Check that the ventilation unit starts after max. 30 s from the burner activation.
While the warm air heater is normally working (after approx. 20 minutes of uninterrupted working), perform
the following operations:
•
Measure the air flow, as it is crucial to get an optimal room heating and furthermore is necessary in
order to adequately cool the heat exchanger. The absence of any kind of resistance on the air flow
generated by the fan is essential. Therefore, avoid any obstacles hindering air supply and return.
•
Check that there is no fuel leakage.
•
Check that the fuel flow is correct by reading the meter.
•
Check the combustion parameters.
•
Check that the installed safety devices do not operate anomalously.
•
On the remote control panel, lower the set-point to a value lower than the room temperature and
check that
only the burner
turns off and that the fan unit does not simultaneously stop.
•
Check that the fan works for 3 minutes after the burner has stopped, before stopping as well.
•
Check that the thermal gradient is equal to the one specified in the TECHNICAL DATA paragraph.
The thermal gradient is the difference between the air outlet and air inlet temperature. Since the air
outlet temperature is not constant through its outlet section, in order to get this value, several
temperature measurements have to be carried out (throughout its outlet sections) and then the
arithmetical mean has to be calculated.
•
Check that the air pressure gauge of the burner is correctly calibrated, so that it stops if the
comburent air is not enough - since this might cause a non hygienic combustion
All the checks above mentioned should be performed in all the arranged working
conditions (max and min).
