24
Instructions for the user
1.14.3 DHW function
The boiler is equipped with a stainless steel water heater with 45 litres single coil.
DHW production function may be enabled by the user in two ways:
• setting a water heater hour programming on the boiler (see par.
Programming mode for heating and water heater
on page
21
);
• using COMFORT function (see par.
Comfort function enable/disable
on page
15
).
DHW temperature may be set within a range from 35°C to 65°C.
Temperature may be set by pressing +/-DHW buttons.
During temperature setting, the DHW symbol
on the display flashes and the domestic hot water setting is displayed.
The water heater heating through "COMFORT" function, or programming, is carried out only if the boiler is in SUMMER or WINTER operating
mode. If the boiler is in CH ONLY or OFF operating mode, the water heater is not heated.
Boiler electronics always gives priority to DHW over CH supply.
1.14.4 Comfort function
The COMFORT function keeps the water heater hot, to minimise the waiting time for the production of DHW.
Enable COMFORT function by pressing the corresponding button on the display (see
Comfort function enable/disable
on page
15
).
1.14.5 Anti-legionella function
Every 15 days the anti-legionella function is enabled. It gets the water heater temperature to 65 °C for 30 minutes, regardless of any other
setting, in order to prevent or remove possible proliferation of bacteria inside the water heater
1.14.6 Freeze protection function
This boiler is fitted 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.
Ambient probes or a room thermostat must be used to provide freeze protection for the central heating system. Bear in mind,
however, that they are disabled when the boiler is in OFF operating mode.
To protect the system, as well as the boiler, set the boiler to WINTER operating mode.
The central heating system can be effectively protected against icing by using specific anti-freeze products that are suitable for multi-metal
systems.
WARNING
Do not use anti-freeze products for car engines, and check the effectiveness 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.
Summary of Contents for ITACA KB 24
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