II.i) Summer mode
Upon activation of this function, this pump is deactivated and
the UHW pump starts above the set temperature (see the
pump activation temperature function), whereas the UHW
pump operates continuously. The summer function allows to
adjust only the boiler set temperature for heating the water in
the vessel. Upon activation of this function, the LCD displays
three items: Boiler temperature (CH), vessel temperature
( UHW) and set temperature.
II. j) Fixed CH Pump
In this mode, pumps are activated concurrently above the set
temperature. (see pump activation temperature function) CH
pump operates continuously, whereas the UHW pump is
deactivated upon reaching temperature set on the boiler.
Warning: For operation in this mode, there should be a three-
way valve or other mixing valve installed to ensure different
environment and boiler temperatures.
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