Bentone B55 - Page 31

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Bentone B55/B65
General
171 435 45 2016-06-30
ELECTRIC EQUIPMENT
Function
1. Switch on operating switch and twin thermostat
The burner motor starts, an ignition spark is formed, the prepurge goes
on till the prepurge period expires and the solenoid valve 1 opens (2).
2. Solenoid valve 1 opens
Oil mist is formed and ignited. The photocell indicates a fl ame.
3. The safety time expires
a. If no fl ame is established before this time limit the control cuts out.
b. If for some reasons the fl ame disappears after this time limit, the burner
will make an attempt to re-start.
4. Full load thermostat ON
The ignition spark goes out after fl ame indication (See Technical data oil
burner control). The burner is in operating position and can now change between
high and low capacity.
4-5. Operating position
If the burner operation is interrupted by means of the main switch or the
thermostat, a new start takes place when the conditions in accordance
with point 1 are fulfi lled.
The oil burner control cuts out
A red lamp in the control is lit. Press the reset button and the burner
re-starts.
Technical data LMO24.255...
LMO24
Pre-ignition time: 25 s
Pre-purge time: 25 s
Post-ignition time: < 1 s
Ambient temperature: från - 5 till + 60°C
Min. current with fl ame established: 45 µ A
Max. photo current at start: 5,5 µ A
Control of photo current
Current through photo unit is measured with a d.c. ammeter (a movingc oil
instrument connected in series with the photo unit).