Function Lme - Bentone BG 550-2 Installation And Maintenance Instruction

9.2.1 List of components
A1 Gas burner control
B1 Ionization electrode
F1 Operation fuse
F2 Operation fuse
H1 Lamp, low capacity
H2 Lamp, high capacity (Optional)
K1 Motor contactor with thermal
overload protector
M1 Burner motor
M2 Damper motor, L&S
SQN75.624.A21B
S1 Operating switch

9.3 Function LME...

1. Operating switch ON-Thermostat ON-Gas pressure switch
ON
A check that the air pressure switch does not indicate fan pressure
is carried out
2. Burner motor starts
A check that the air pressure switch indicates sufficient fan pressure
is carried out
3. The ignition spark is created
4. The gas solenoid valve is open
The gas is ignited. The ionisation electrode now indicates a flame
5. The safety time expires
The ignition spark ceases. The safety period ceases. If the spark is
missing or it disappears after this time limit, the gas burner control is
blocked
6. Operating position
7. Stop
The operation of the burner can now be stopped with the control
switch or thermostat
If the gas burner control is blocked
Red light in the gas burner control is lit. The burner is restarted by
pushing the reset button
9.3.1 Technical data
Preiginition time
Prepurge time
Postignition time
Safety lockout time
Reset time after lockout
Reaction time on fl ame failure
Min. ionisation current at fl ame
Max. ionisation current
S2 Operating switch, stage 2
S3 Control thermostat
S4 Temperature limiter
S5 Micro switch for hinged door
S6 Control thermostat, stage 2
S7 Main switch 3-phase
S8 Air pressure switch
S20 Main switch 1-phase
T1 Ignition transformer
X1 Connection terminal board
X2 Earth terminal
X3 Plug-in contact, burner
LME22.232C2E
3 s
20 s
2.5 s
< 3 s
< 1 s
< 1 s
5 µA
20 µA
X4 Plug-in contact, boiler
X5 Plug-in contact, stage 2,
burner
X6 Plug-in contact, stage 2 boler
X7 Plug-in contact, 3-phase,
burner
X8 Plug-in contact, 3-phase,
boiler
S9 Gas pressure switch
Y1 Gas solenoid valve 1
Y2 Gas solenoid valve 2
! Mains connection and
fuse in accordance
with local regulations.
Bentone
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