17
ANTIFREEZE FUNCTION
In case the delivery probe measures a temperature lower than 7°C, the circulator is
activated.
If the temperature goes down the value of 4°C the main heat exchanger is ignited until the
delivery temperature has reached 20°C. The antifreeze function is active also with the
boiler turned OFF
(function in standby mode but with bright switch on).
HEATING REQUEST
As the contact of room thermostat closes, if the mainboard is in winter mode, the system
pump is only activated if the temperature of the primary heat exchanger is higher than the
temperature set by parameter
N°6
.
If the value of temperature measured by the primary heat exchanger probe is lower than the
programmed delivery setpoint, the triac are ignited in sequence as per the required power.
This occurs only after a settable time by parameter
N°5
.
The instant power of the boiler and the related control of triac G1-G4 takes place by
means of PID regulator.
At the end of the request the pump remains supplied for a time equal to the value programmed
by
N°4
parameter.
MEANING OF THE KEYS OF TEMPERATURE MENU
To log in temperature menu, press simultaneously J3 and J5 keys. The symbol
F
F
F
F will
appear on the display.
KEY FUNCTION
J7 Exit by temperature menu
J2 Temperature index increase
J3 Temperature index decrease
MEANING OF KEYS OF PARAMETERS MENU
To log in parameters menu, press simultaneously the keys J2 and J6 for 4 seconds.
The symbol
F
F F
F will appear on the display.
KEY FUNCTION
J5 Parameter value decrease
J6 Parameter value increase
J7 Exit by parameters menu
J2 Parameter index increase
J3 Parameter index decrease
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