E.C.A. Confeo Premix CP 24 HST Installation And User's Operating Instructions page 39

Frost Protection
5
The appliance goes on and off automatically depending on actual water temperature values
measured by the sensors for protecting water circuits against freezing. This function protects both
CH and DHW systems.
- When the appliance in stand-by mode and the CH flow sensor measures a low water temperature
in the system (less than 5 °C), the boiler starts as if there was a CH demand. When the CH water
temperature goes above 19 °C (measured on the CH flow sensor), the CH demand will end (burner
will be off).
- The same situation occurs when DHW tank sensor measures less than 5 °C. The boiler starts and
when the water temperature goes above 19 °C, the boiler will turn stand-by mode.
Pump & 3 Way Valve Anti-sticking Function
6
Anti-sticking protection's function prevents the pump from probable blocking when the pump stays
inactive for a long period of time. This function goes on automatically if the pump has been inactive
for at least 24 hours and runs the pump for a few seconds in CH mode.
The same principle is available for the 3 way valve. 3-way valve protection becomes active after
permanent standstill of 24 hours and the 3-way valve changes his position against blocking.
: The appliance must be on stand-by mode to activate frost protection
system.
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