OPERATION DESCRIPTION WITH GASEOUS
FUEL
With switch 2 in GAS position (GAS led lighted up), closing the switch
"1", if the thermostats are closed, the voltage reaches the command
and control equipment that starts its operation.
The fan motor is thus switched on to carry out the pre-ventilation of
the combustion chamber, at the same time the air damper control
servomotor moves to the opening position corresponding to the ma
-
ximum power setting.
At the end of the pre-ventilation phase, if the air ventilation control
pressure switch has found that there is sufficient pressure, the ignition
transformer will come on, and two seconds later the safety and main
gas valves will open.
We can specify that:
•
The main valve is a slow opening single-stage valve
•
The safety valve is an ON/OFF valve
•
The air damper is activated by a dedicated electric servomotor,
keep in mind that when the burner is locked out because the ther-
mostat is tripped, the servomotor returns the air damper to the clo
-
sed position.
The presence of the flame, detected by its control device, allows to
continue and complete ignition, by disconnecting the ignition transfor-
mer.
If there is no flame, the appliance shuts down in “safety lock-out”
mode (lock warning light 5) within three seconds of the opening of
the main valve. In safety lock-out mode the valves are closed again
immediately. To release the equipment from this safety position, press
button "6" on the control panel.
display_TBML_001
1
2
3
4
5
7
8
1
6
9
1 ON / OFF main switch
2 Fuel switch.
3 Liquid fuel operation warning light.
4 Gaseous fuel operation warning light.
5 Equipment shut-down warning light.
6 Equipment release button.
7 Voltage warning light.
8 Fusibile.
9 Fuel loading button.
ENGLISH
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0006160079_202008
Summary of Contents for TBML 90P
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