171 415 20 07-01
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 opens (2).
2.
Solenoid valve opens
Oil mist is formed and ignited. The photocell indicates a lame.
(1)
The ignition spark goes out 15 s. after lame indication (LOA24.171...).
(2)
The ignition spark goes out 2 s. after lame indication when the ignition
transformer is connected to terminal 7
(LOA24.173...).
3.
The safety time expires
a. If no lame is established before this time limit the control cuts out.
b. If for some reasons the lame disappears after this time limit, the
burner will make an attempt to re-start.
3-4. 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 fulilled.
The oil burner control cuts out
A red lamp in the control is lit. Press the reset button and the burner
re-starts.
Post-ignition
(2)
If a post-igniton of 15 s. is wanted, move the ignition transformer
from terminal 7 to terminal 6 (LOA24.173...).
Technical data
Pre-ignition time:
13 s
Pre-purge time:
13 s
(1)
Post-ignition time:
15 s
(2)
Post-ignition time:
2 s
Safety lock-out time:
10 s
Reset time after lockout:
≈
50 s
Reaction time on lame failure:
max. 1 s
Ambient temperature:
from - 20 to +60°C
Min. current with lame established:
65 µA
Max. photo current at start:
5 µA
Enclosure:
IP 40
(Under voltage proof only LOA24...)
Control of photo current
Current through photo unit is measured with a d.c. ammeter (a moving coil
instrument connected in series with the photo unit).
ELECTRIC EQUIPMENT
2(2)