baltur TBG 35 MC, Instruction Manual For Installation, Use And Maintenance

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OPERATING DESCRIPTION
The gas flow adjustment in the first and second stage is carried
out by a streamlined valve activated by the electric servomotor (7).
The movement of the air damper (8) depends on the rotation of the
servomotor (7) through a lever system (1).For the adjustment of the
air damper position according to the power burned in the first and
second stage, consult section: "Ignition and regulation" .
If when the main switch is turned on, the thermostats are on, the
voltage reaches the control box which starts the burner.
This turns on the fan motor for pre-ventilating the combustion chamber.
At the same time the command servomotor (7) rotates, bringing the
gas throttle and the air damper, by means of a lever system (1), to the
opening position corresponding to the second flame.At the end of the
pre-ventilation phase, the gas throttle and the air damper are returned
to the ignition position (Cam IV), then the ignition transformer (2)
comes on and, 3 seconds later, the gas valves open.
The presence of the flame, detected by the control device, permits
continuation and completion of ignition, turning off the ignition
transformer. Then passing on to the second stage of power through
the progressive opening of the gas throttle and the air damper at the
same time.At the moment in which the demand for heat from the
system is satisfied, the boiler thermostat will intervene and shut down
the boiler. The air damper, through the rotation of the servomotor,
will reach the closed position when inactive.In the event that the
control device does not detect the presence of a flame, the control
box activates a “safety lock-out” within 3 seconds of the opening of
the main gas valve.In “safety lock-out” mode the valves are closed
again immediately. To release the equipment from its safety position,
press the reset button (9).
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