Functions of the heating circuit

5.4Deactivation depending on outdoor temperature

5.4.1 OT deactivation value in rated operation

If the outdoor temperature during rated operation exceeds the limit OT deactivation value in rated 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, during the warm season, the system is switched off at an outdoor temperature of 22 °C.

Parameter

WE

Range of values

OT deactivation value

22 °C

0 to 50 °C

in rated operation

 

 

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

15 °C

–10 to 50 °C

in reduced operation

 

 

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.

44EB 5476 EN

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Samson 5476 manual OT deactivation value in reduced operation, Summer mode

5476 specifications

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