Bentone BG 550 LN, Installation And Maintenance Instruction

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Wiring diagram LME22 (BG550/BG550LN/BG650) Modulating
172 445 12 16-01
ELECTRIC EQUIPMENT
If S6 is missing, connection between T6 and T8.
Mains connection and fuse in accordance with local regulations.
Max loading K1
Connection A1,A2 / 95, 96 / 97, 98 Max 0,2A/15W
Function LME22
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 full load. A control is made
that the air pressure switch indicates suffi cient fan pressure.
3. Air damper motor closes.
The air damper motor closes to low load . Then the ignition spark is
formed.
4. Main and safety valves open
The gas is ignited. The ionization electrode indicates a fl ame.
5. The safety time expires.
The ignition spark goes out. The safety time expires. If there is no fl ame
or if for some reason the fl ame 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 full load
if the operating switch and the thermostat for full load are in positon ON.
The burner can alternate between full and low load depending on set
temperature.
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.
3(5)
A1 Gas burner control
A2 Power control
B1 Ionization electrode
F1 Operation fuse
F2 Operation fuse
F3 Operation fuse
H1 Lamp, low capacity
H2 Lamp, high capacity (optional)
K1 Motor contactor with thermal overload protector
M1 Burner motor
M2 Damper motor
S1 Operating switch
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
S9 Gas pressure switch
S11 Change-over switch, Aut.-man.
S12 Change-over switch, Increase Reduce
S15 Control thermostat, 3-pole (only for 2-stage
sliding)
S16 High pressure switch
S20 Main switch
T1
Ignition transformer
X1 Connection terminal board
X2 Earth terminal
X3 Plug-in contact, burner
X4 Plug-in contact, boiler
X5 Plug-in contact, stage 2, burner
X6 Plug-in contact, stage 2, boiler
X15 Plug-in contact, power controller, burner
X16 Plug-in contact, power controller
Y1
Gas solenoid valve 1
Y2 Gas solenoid valve 2
Y3 Safety solenoid valve
List of components LME22 (BG550/BG650)