Room temperature controller RTC Basic D 24 V

Referenznummer: 51203000

Lowering mode (ECO)
In many areas of the building it makes sense for the temperature to be set to a lower ECO temperature at certain times rather than to heat permanently to the comfort temperature. By connecting the input terminal Ø to 24 V, the temperature is reduced by 4 °C. This should be controlled by a central clock.

Cooling mode
Modern heat pump systems often also provide the option of cooling rooms. In cooling mode, it is possible to change the cooling temperature using the control knob.
Switching between heating and cooling mode is done via the control knob or by wiring the input terminal “C” with 24 V.

Temperature drop detection
In the event of a sharp drop in temperature, e.g. after opening a window, the system regulates to the frost protection temperature of 5 °C for a maximum of 30 minutes. Pressing or turning the control knob cancels the operation.

Offset
This function allows the adjustment of the position of the control knob so that it corresponds to the room temperature. Thus, the indication of the temperature via the control button is comparable in different rooms. An adaptation of up to +/- 3 °C is possible.

Controller adjustment
Depending on the heating system, the control behaviour can be adjusted.

Pulse width modulated control (factory setting): Optimised for electrothermal valve drives (see Technical data): The output is not permanently actuated, but for a time period (pulse width) that depends on the difference between setpoint and actual temperature. This method brings the actual temperature gradually closer to the setpoint temperature.

Two-point control: The output remains switched on until the selected setpoint temperature has been exceeded by 0.5 °C. The output will not be switched on again until the setpoint value is undercut by 0.5 °C. Since most heating systems respond very slowly, this type of control can entail temperature overshooting.

Set valve type
Depending on the electrothermal valve drive used, an adaptation to the valve type must be made. There are valve drives where the valve is opened (deenergised opened) or closed (deenergised closed, factory setting) when no supply voltage is applied.