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5.4 Deactivation depending on outdoor temperature
5.4.1 OT deactivation value in rated operation
If the outdoor temperatureduring rated operation exceeds the limit
OT deactivation value in rated
operation
, the affected heatingcircuit is put out ofservice immediately. The valve is closedand the
pump is switched off after a lag time. When the outdoor temperature falls below this value (less
0.5 °C hysteresis), heating operation is restarted immediately.
With the default settings, this means that, during the warm season, the system is switched off at
an outdoor temperature of 22 °C.
Parameter
WE Range of values
OT deactivation value
in rated operation
22 °C 0 to 50 °C
5.4.2 OT deactivation value in reduced operation
If the outdoor temperature during reduced operation exceeds the limit
OT deactivation value in
reduced operation
, the affected heating circuit is put out of service immediately. The valve is
closed and the pump is switched off after a lag time. When the outdoor temperature falls below
this value (less 0.5 °C hysteresis), heating operation is restarted immediately.
With the default settings, this means that, at night, the system is switched off at an outdoor tem-
perature of 15°C to save energy. Nevertheless, remember that the system requires some time in
the morning to heat up the building
Parameter
WE Range of values
OT deactivation value
in reduced operation
15 °C –10 to 50 °C
5.4.3 Summer mode
Summer mode is activated depending on the mean daytime temperature (measured between
7.00h and 22.00h) during the desired period.
If the mean daytime temperature exceeds the
Outdoor temperature limit in summer mode
on
two consecutive days, summer mode is activated on the following day: the heating is switched
off. If the mean daytime temperature remains below the
Outdoor temperature limit in summer
mode
on the next day, summer mode is deactivated on the following day.
44 EB 5476 EN
Functions of the heating circuit