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20039847GB
7.2. 2-Stage Burners (H-Burners)
Required input signals to the control unit
Control signals from the control unit
TZ
Limit thermostat
M2
Servo motor
TS1
Control thermostat, stage 1
AD
Air damper
TS2
Control thermostat, stage 2
T1
Ignition transformer
E1
Preheater
EV1
Solenoid valve, stage 1
TSW
Thermostat of preheater
EV2
Solenoid valve, stage 2
M1
Burner motor (fan/oil pump)
B1
Flame detector/flame signal
Adjustable switching points on the cam switch of the servomotor
I
= switching point of stage 2
II
= switching point of air damper ”closed” position after controlled shut-down
III
= switching point of ignition load and stage 1
IV
= fixed with cam switch
III
, diff6°
V
= switching point of solenoid valve stage 2
