Immergas EOLO Mini Technical Documentation Manual page 29

Technical documentation
EOLO Mini OPERATION SEQUENCE
Heating phase
POWER SUPPLY
Main switch in WINTER position
CLOSING OF ROOM THERM. SWITCH
Room thermostat request
POWERING PUMP
The modulation board powers the circulator
The board checks the correct position of the flue pressure switch (contact open)
The modulation board determines the closing of the flue pressure switch
The ignition circuit of the board powers the ignition electrodes
With the consensus of the overheating thermostats, the ignition circuit powers
The board sends the soft ignition signal to the modulation coil.
By means of the ionisation electrode, the ignition circuit detects the
The burner operates at an output that varies according to the type of request,
the adjustments/settings made and the temperature read by NTC sensor
STEME ed 07/03
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POWERING THE IGNITION CIRCUIT
The board adjustment circuit powers the ignition circuit
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FLUE PRESSURE SWITCH CONTACT CONTROL
FAN POWER
The modulation board powers the fan
FLUE PRESSURE SWITCH CONTACT CONTROL
contact following fan operation (contact closed)
IGNITION ELECTRODE POWER
GAS VALVE COIL POWER
the main coils of the gas valve.
BURNER IGNITION (SOFT)
FLAME DETECTION
presence of a flame on the burner and ends the ignition cycle
BOILER OPERATING
Hot water phase
POWER SUPPLY
Main switch SUMMER or WINTER position
HOT WATER OPERATION REQUEST
Drawing of hot water
POWERING PUMP
The modulation board powers the circulator
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Technical documentation
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EOLO MINI