Nova Florida DELFIS Monothermal - Page 12

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Instructions for the user
1.3.4 DHW function
Boiler electronics always gives priority to DHW over CH supply.
To set the domestic hot water temperature, press DHW +/- buttons.
The DHW temperature setting range is from +35 °C to +57 °C.
During temperature setting, the
symbol ashes on the screen and the DHW current temperature setting is displayed.
The burner ON symbol
shows while the burner is operating.
1.3.5 Freeze protection function
This boiler is tted with a freeze protection system, which works when the following functions are activated: OFF/SUMMER/WINTER/CH ONLY.
DANGER
The freeze protection function only protects the boiler, not the whole heating system.
The central heating system can be eectively protected against icing by using specic anti-freeze products that are suitable for multi-metal
systems.
WARNING
Do not use anti-freeze products for car engines, and check the eectiveness of the product used over time.
In case burner cannot be ignited due to the lack of gas, the freeze protection functions are anyway enabled through the circulation pumps.
1.3.5.1 Flow freeze protection function
When the heating water temperature sensor detects a water temperature of +5 °C, the boiler switches on and stays on at its minimum heat
output until the temperature reaches +30 °C or 15 minutes have elapsed.
The pump continues to operate even if the boiler shuts down.
1.3.5.2 DHW plate exchanger freeze protection function
When the DHW temperature sensor detects a water temperature of +5°C, the boiler switches on and stays on at its minimum heat output until
the DHW temperature reaches +10°C or 15 minutes have elapsed (the deviating valve is in the DHW position).
During the DHW freeze protection operation the temperature detected by the ow probe is constantly checked, and in case it reaches +60 °C
the burner is switched o.
The burner is switched on again if the operation request in anti-freeze mode is still present and the ow temperature is below +60°C.
The pump continues to operate even if the boiler shuts down.
1.3.6 Anti-seize function
If the boiler remains inactive and connected to the power mains, the circulation pump and the deviating valve (if any) will be shortly enabled
every 24 hours so as to avoid any shut-down.
The same applies to the relay which can be freely programmed whenever this latter is used to power a recirculation pump or a deviating valve.