Immergas VICTRIX 75 - VICTRIX 75 Operating Sequence; Heating Phase Sequence

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STV75 ed 01/08 VICTRIX 75
VICTRIX 75 operating sequence.
Heating phase.
Power on
Main switch ON
Pump power supply
e integrated board powers the boiler pump
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Burner ignition (automatic slow ignition)
e integrated board keeps the fan working at ignition speed
Flame detection
By means of the ionisation electrode the control unit detects burner ignition and sends the signal to this eect to the modulating control
board
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Room thermostat switch closing
A room thermostat request shows conditions that require the central heating function
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Boiler working
e burner works at a power that varies according to the type of request, to the adjustments/settings made and to the temperatures
detected by the NTC probes
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Integrated board operation enabled
Closing of the main switch contacts (ON position) enables operation in the central heating mode
System pressure micro switch closing
Pressure in the primary circuit higher than the minimum shut-o value causes the pressure switch micro contact to close
Fan function
e integrated board controls the fan speed
Powering the ignition electrodes
When the fan reaches the speed in the ignition phase, the integrated board powers the ignition electrodes
Powering the ignition electrodes
When the fan reaches the speed in the ignition phase, the integrated board powers the ignition electrodes
Safety thermostat switch closing and ue thermostat
Closing of the safety thermostat contacts and ue thermostat enables the boiler to work
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Powering the fan
e integrated board powers the fan
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