Instructions condensing Air heaters type HR
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Non modulating system fan
•
System fan (M1) does not start or does not vary in speed; Check first the functioning of
this fan by connecting it to 230 Volt. Check with a multi-meter if the different lower
tensions are secondary present on the transformer as well. The fuse could have failed. If
the motor and transformer are OK, the cause of the problem must be in the heater
control HC, as the heater control HC dictates the different voltages from the transformer
to the fan-motor. In that case, replace the heater control HC.
11
Maintenance / spare parts
The heater must be inspected and cleaned regularly (once a year) by a qualified installer who
understands this appliance.
This is all the more important as the circumstances are heavier, especially in case of dust,
humidity, high frequency of switching on/off etc.
Activities:
11.1 General inspection
•
Check the overall condition of the installation. Check the heater, the thermostat, the wires
and the gas line.
11.2 Inspection of the heater
Before starting the inspection, switch off the electric power to the heater with the maintenance-
switch and close the manual gas valve.
•
Take out the burner, complete with flange and pre-mix fan, by unscrewing the 6 off M6
socket screws and you have taken off the ignition and fan wires
•
Check the heat exchanger from the inside for dirt and/or damage.
•
Check the burner on damage and clean the ignition electrode if necessary . CAUTION: do
not twist the electrode out of shape!
•
Check the air supply and the flue discharge.
•
Clean eventual the inside of the heater with a vacuum cleaner.
•
In case the heat exchanger is dirty on the outside, clean it with a soft brush. Never use a
steel wire brush!
•
Clean the fan-grid with a vacuum cleaner and a brush.
•
Put the burner back in (renew the gasket)
After this, check the heater on efficiency of combustion and adjust these if necessary
Check the heater operates correctly.
11.3 Ignition electrode
For the correct ignition of the burner it is important that the ignition electrode is adjusted right.
•
The distance between the electrode and the burner should be 5.0 ±0.5 mm.
•
The distance between the two electrodes should be 3.6 ±0.4 mm.
•
Check the setting of the ignition electrode, the spark has to be formed between the
electrodes and not between the electrode and the burner.
5
±
0
,5
3
.6
±0
,4
