User manual P 40 - P 120
Issue: 11.14
5 Operation
Page 15
5. Operation
Connect to 230V mains and (if present) open the oil valve.
Press the white button (ON/OFF) of the BCU until one of the other LED’s light up, the appliance is
switched “on“ in the last chosen setting.
By pushing the red button continuously, different settings can be chosen (the chosen setting will start
after 3 seconds)
Error
OFF Appliance will not react to any signal
1
AUTO
Appliance waits for a signal from the thermostat for heating or ventilating
2
Appliance will start burning (manual setting)
3
The ventilator will start running (and only this)
4
+ AUTO
Appliance will ventilate continuously and waits for a signal from the
thermostat for heating.
5
When the heater is activated, the electric motor starts, operating the oil pump and the fan.
The oil pump draws fuel from the oil box or tank (depending on the type of oil supply system in use), the
fan creates an air current providing the oxygen needed for combustion.
The ignition is activated at the same time as the motor. If you look into the combustion chamber from
the front while the heater is activated, you should see the blue ignition spark appear towards the back. A
current from a transformer creates the spark.
After about thirteen seconds, a voltage of 230 V is applied across the oil pump's magnetic valve causing
it to open. You should be able to hear the click of the valve opening. Once the valve has opened, fuel is
pumped to the oil atomising nozzle, from which it emerges as a spray, which is immediately ignited by
the ignition spark.
About two seconds after the burner has lit, the ignition system is deactivated. This helps prolong the life
of the transformer; continuous ignition is in any case unnecessary because the heater uses a high-
pressure system.
During operation, the heater is monitored and regulated by an automatic control box, the BCU,
connected to a photocell, which monitors the flame in the combustion chamber. If a fault is detected
when the heater is activated or while it is in operation - if, for instance, the oil supply fails or there is
insufficient oxygen - the heater will immediately lock out. When this happens, all the components
mentioned above except for the electric motor are automatically deactivated and the heater ceases to
function. The red lockout indicator light on the BCU also comes on. If the reset button is pressed, the
heater will start up again. However, if the fault has not been corrected, the heater will simply lock out
once more.
For advice on what to do if your heater develops a fault, see chapter 9.
When the heater is deactivated or locks out automatically, the flame goes out but the fan will continue to
run for about a minute to cool down the heater.
