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1.10.4.1. Antifreeze function in delivery
The delivery line antifreeze function has two phases:
If the temperature sensor of the heating water detects a water temperature value < TSP 38 + 2°C, the boiler starts the circulators and stays
switched on until the temperature of the heating water reaches a value > TSP 38 + 5°C.
In case the boiler blocks, the pump circulation is however ensured.
If the heating water temperature sensor detects a temperature value < TSP 38, the boiler starts with the burner at the lowest power value.
Once a temperature value > 42°C is reached, the burner goes off while the circulator keeps operating for about 150 seconds.
In case the boiler blocks, the pump circulation is however ensured.
1.10.4.2. Antifreeze function for the domestic hot water plates
The antifreeze function protects as well the domestic hot water circuit.
When the temperature sensor of the domestic hot water detects a water temperature of 5°C, the boiler gets switched on and stays on
the minimum thermal power value until the temperature of the domestic water reaches a temperature of 7°C (the diverter valve is set on
domestic hot water position).
During the antifreeze phase in domestic hot water, the temperature is continuously detected by the sensor on the delivery line and, as
soon as it reaches the value of 42°C, the burner gets switched off. The burner is switched back on if during antifreeze phase the delivery
temperature drops below 5°C.
In case the boiler blocks, the pump circulation is however ensured.
1.10.5. Pump and diverter valve anti-block function
In case the boiler stays inactive and connected to the power mains, every 24 hours the circulation pump and diverter valve are activated
for a short period of time (30 seconds) to prevent them from blocking.
1.10.6. Operation with external probe (option)
The boiler can be connected to a probe that measures the outside temperature (this option is not mandatory; supplied by the manufactur-
er). Note: the temperature outside the boiler adjusts automatically the temperature of the heating water, by increasing it if the external tem-
perature drops and decreasing it when the external temperature rises, to improve comfort and save energy. The maximum temperatures
of the standard and low range are, however, met.
This boiler operation type is defined as being "sliding temperature operation".
The heating water temperature varies according to a program written in the microprocessor of the boiler electronics.
With external probe, the key “
” (C fig. 1) loses its temperature setting function for the heating water
and, instead, allows changing
the “dummy” temperature, i.e. the theoretical temperature desired in the environments to be heated.
On setting the temperature, the dummy ambient temperature value flashes on the display, while the value being set is displayed.
For the optimal adjustment of the curves it is recommended to set it to about 20°C. For further details on the sliding temperature operation
refer to paragraph 3.2.14.
Use exclusively original external probes provided by the manufacturer.
Using external probes other than original, not supplied by the manufacturer, having technical characteristics
different from those required by the electronic management, can affect the operation of the external sensor
and of the boiler.
1.10.7. Operation with Remote Control (option)
The boiler can be paired to a remote control (option not mandatory, supplied by the manufacturer), that allows managing remotely many
parameters of the boiler, for instance:
- select the boiler operation mode;
- select the ambient temperature;
- select the temperature of the heating system water;
- select the temperature of the domestic hot water;
- program the start-up time of the heating system and the activation timing of a possible external boiler (option);
- display boiler diagnostics;
- unblock the boiler;
and other parameters.
To connect the remote control refer to the paragraph 3.2.13 and to the user’s manual annexed to the remote control.
Use exclusively original remote controls supplied by the manufacturer.
Using remote controls other than original, not supplied by the manufacturer, can affect the operation of the
remote control itself and of the boiler.
