Immergas EOLO Mini - Page 29

Technical documentation Technical documentation
STEME ed 07/03
29
EOLO MINI
EOLO Mini OPERATION SEQUENCE
Heating phase Hot water phase
POWER SUPPLY POWER SUPPLY
Main switch in WINTER position Main switch SUMMER or WINTER position
⇓ ⇓
CLOSING OF ROOM THERM. SWITCH HOT WATER OPERATION REQUEST
Room thermostat request Drawing of hot water
⇓ ⇓
POWERING PUMP POWERING PUMP
The modulation board powers the circulator The modulation board powers the circulator
⇓ ⇓
POWERING THE IGNITION CIRCUIT
The board adjustment circuit powers the ignition circuit
⇓ ⇓
FLUE PRESSURE SWITCH CONTACT CONTROL
The board checks the correct position of the flue pressure switch (contact open)
⇓
FAN POWER
The modulation board powers the fan
⇓
FLUE PRESSURE SWITCH CONTACT CONTROL
The modulation board determines the closing of the flue pressure switch
contact following fan operation (contact closed)
⇓
IGNITION ELECTRODE POWER
The ignition circuit of the board powers the ignition electrodes
⇓
GAS VALVE COIL POWER
With the consensus of the overheating thermostats, the ignition circuit powers
the main coils of the gas valve.
⇓
BURNER IGNITION (SOFT)
The board sends the soft ignition signal to the modulation coil.
⇓
FLAME DETECTION
By means of the ionisation electrode, the ignition circuit detects the
presence of a flame on the burner and ends the ignition cycle
⇓
BOILER OPERATING
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