LEGEND
MB
Burner terminal strip
MV
Fan motor
K1
Fan motor contact maker
F
Protection against radio interference
F1
Thermal overload relay
K2
Resistor contact maker
R1
Timer relay
R2
Relay
TE
Electronic thermostat
TM
Maximal thermostat
Tm
Minimal thermostat
PO
Oil pressure switch
TA
Ignition transformer
S
Pre-heater tank
SM
Air-damper actuator
SO
PT100 probe
FR
Photoresistance
VF
Operation Valve
CN...
Connectors
C
Damper
VS1
Safety valves
VS2
Safety valves
5507
INTERNAL WIRING DIAGRAM
(carried out by the factory)
DIRECT START-UP
5
GB
TE
SO
Pre-heater connection probe
to electronic thermostat
D2024
D1989