
9172 425 51 08-01
ELECTRIC EQUIPMENT
List of components
A1 Gas burner control S12 Change-over switch, Increase-
A2 Power control Reduce
B1 Ionization electrode S15 Control thermostat, 3-pole
F1 Operating fuse (only for 2-stage sliding)
H1 Operating lamp T1 Ignition transformer
H3 Alarm signal 230 V X1 Connection terminal board
M1 Burner motor X2 Earth terminal
M2 Damper motor, X3 Plug-in contact, burner
L&S SQN75.624A21B X4 Plug-in contact, boiler
P1 Time meter, X15 Plug-in contact, power
total operating time controller, burner
S1 Operating switch X16 Plug-in contact, power
S3 Control thermostat controller
S4 Temperature limiter S9 Gas pressure switch
S5 Micro switch for hinged door Y1 Gas solenoid valve 1
S7 Main switch Y3 Safety solenoid valve
S8 Air pressure switch
S11 Change-over switch, Aut.-Man.
Mains connection in fuse in accordance with local regulations.
2(2)
Gas burner control: LME22
Function
1.Operating switch ON-Thermostat ON-Gas pressure switch ON-Air
damper closed.
A control is made that the air pressure switch does not indicate fan
pressure. Then the burner motor starts.
2.Air damper motor opens.
The air damper motor opens the damper to max. position. A control is
made that the air pressure switch indicates sufficient fan pressure.
3.Air damper motor closes.
The air damper motor closes to min. load position. Then the ignition spark
is formed.
4.Main and safety valves open.
The gas is ignited. The ionization electrode indicates a flame.
5.The safety time expires.
The ignition spark goes out. The safety time expires. If there is no flame or
if for some reason the flame disappears after this time limit, the burner
control locks out.
6.Operating position.
The burner is in operating position and can now change over to the capa-
city controlled by the regulator.
7.Stop. The operation of the burner can now be interrupted by means of
the operating switch or the thermostat.
The control locks out. The red lamp in the control is lit. Restart the burner by pressing the reset
button.