Operation - Lamborghini Caloreclima Futuria 24 PLUS MB W TOP U Manual Para La Instalación Y El Mantenimiento

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OPERATION

When the unit is switched on (or when it is reset), and where no heat has been requested, the system
runs through the following procedure:
G 5 second safety pause;
G 15 seconds 3-way valve activation;
G 60 seconds circulator activation;
G circulator and 3-way valve switched off.
This cycle is run every 24 hours and 24 hours after the last heat request. The above operations ensure
that the components are put in motion at least once a day.
HEATING
The heating start-up cycle, after a period of inactivity, is as follows:
G 15 seconds 3-way valve activation;
G pump activated;
G air pressure switch contacts checked (they must be closed);
G fan switched on;
G when heat is requested pre-ventilation begins;
G ignition transformer switched on and gas valve opened;
G if flame detection reveals normal operation the fan runs for a few seconds at maximum power and
then modulation begins.
When heat is no longer requested the burner is switched off while the pump continues to run for 3
minutes (post-circulation time). The 3-way valve is then disactivated.
If the flame is not detected the pre-ventilation/ignition cycle is repeated after a set safety period has
elapsed (repeated up to 2 times, after which the unit is shut down).
HOT WATER PRODUCTION
When hot water is requested the 3-way valve switches immediately to the hot water circuit.
When the burner is switched off the pump continues running for another two minutes after which it
shuts down.
A hot water request is detected by a temperature sensor on the hot water circuit heat exchanger; this
trips the hot water production system when the sensor-detected temperature is lower than the parameter
n° 1 setting.
Modulation takes place immediately and proceeds as a function of boiler water return temperature.
When producing hot water, the burner goes out when the sensor-detected temperature exceeds set
temperature.
DUAL FUNCTION (HOT WATER + HEATING)
If there is a request for hot water when heating is in progress, the 3-way valve diverts the water flow
towards the hot water heat exchanger (hot water has precedence over heating). When hot water is no
longer required the burner goes out and the pump continues running for another two minutes, then
stops. The three-way valve then diverts the water flow back to the heating circuit. The pump is then
restarted and the heating function put back into operation.