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3.17 "CHIMNEY SWEEP" FUNCTION
When activated, this function forces the boiler to variable output for 15 minutes.
In this state all adjustments are excluded and only the safety thermostat and the limit thermostat remain active.
This function allows the technician to check the combustion parameters.
Once the function is activated, it is possible to select whether to make the check in CH status or DHW status (when paired with a storage
tank unit) by opening any hot water cock.
Using the buttons " " you can select between three predefined power levels:
- "0%";
- Max CH output (P2);
- Max DHW output (P0).
While by using the buttons " " you can select the power from 0% to max DHW output (P0), with intervals of 1%.
Heating or DHW operation (when combined with a storage tank unit) is displayed by the corresponding symbols "
After the checks, deactivate the function by switching the boiler off and then back on again.
3.18 PUMP ANTI-BLOCK FUNCTION
The appliance has a function that starts up the pump at least once every 24 hours for 30 seconds in order to reduce the risk of the pump
locking up due to prolonged inactivity.
3.19 THREE-WAY ANTI-BLOCK SYSTEM
In both phase "Domestic Hot Water" and "Domestic Hot Water-Central Heating" (when combined with a storage tank unit), the appli-
ance has a function that activates the motorised three-way unit 24 hours after the last time it operated by running a complete cycle in or-
der to reduce the risk of the three-way blocking due to prolonged inactivity.
3.20 RADIATORS ANTIFREEZE FUNCTION
If the system return water is below 4°C, the appliance starts up until reaching 42°C.
To activate the chimney sweep function, press the "
vation of the function in the absence of DHW requests.
Its activation on the boiler display is confirmed by the indicators flashing at
the same time (Ref. 17 and 18 Fig. 37).
52
" button until acti-
" or "
".
81
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