Fondital Tahiti Condensing 24 kW Combi (KC), Installation, Use And Maintenance Manual

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2.4.5 PUMP AND THREE-WAY VALVE ANTI-SEIZE FUNCTION
Where the boiler is to remain inactive and:
- no.
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selector is not set to the OFF position;
- boiler is not disconnected from electric main power supply;
the circulation pump (KC and KR model) and three-way valve (KC model), are operated for 30 second every 4 hours in order to prevent
the components from seizing.
2.4.6 External probe operation (optional equipment)
The boiler can be equipped with an external temperature probe (optional equipment), through which the boiler adjusts CH water tem-
perature according to outdoor temperature.
In other words, increasing CH water temperature when outdoor temperature decreases and vice-versa, providing increased energy sav-
ing operation (such boiler mode is called “sliding temperature operation”).
Boiler microprocessor program determines CH water temperature variations.
When an external temperature probe is connected to the boiler, CH water
temperature adjusting knob, no. 4 (pic. 1), loses its function and becomes
a virtual room temperature adjusting device.
During temperature setting, the virtual ambient temperature symbol
flashes and the temperature setting is displayed.
When no. 4 knob is turned fully counter-clockwise, selected room temperature is 15 °C; when
set to 9:00 o’clock selected room temperature is 18 °C; when set to 1:00 o’clock selected room
temperature is 5 °C; when set to 3:00 o’clock selected room temperature is 3 °C; when is turned
fully clockwise selected room temperature is 35 °C.
For best curve setting, it is advisable a position close to 0 °C.
Refer to 4.5.8 paragraph for detailed sliding temperature operation.
Only original external probes supplied by the manufacturer must be used.
If non-original external probes are used, correct operation of the boiler cannot be guaranteed.