Electronic Caretaker

The electronic caretaker automatically switches the heating circuit:

In order to avoid frequent switching, the filtered outside air temperature is filtered once again inside the heating circuit. The period for the cascaded filtering of the outside air temperature is defined by the parameter OAT-04. The red curve in the next picture is the filtered and the black curve is the double filtered outside air temperature.

The heating circuit will be switched off when any of the following conditions are true:

Usually the first switch off condition happens earlier.

The heating circuit will be switched on again when both of the following conditions are true:

Usually the second switch on condition happens later.

The calculated long period filtered outside air temperature is displayed in the output "LongFiltOATemp" and the parameter DISP-03.

Fig. 10.   Heating limits

Table 16.   Parameter List

Description

Value Range

Default Value

Unit

OAT-01: high limit smooth filtered long period

0...150

16

°C

OAT-02: high limit smooth filtered short period

0...150

18

°C

OAT-04: long time smooth filtering

0...168

48

h

DISP-03: long term smooth filtered outside air temperature

-50…150

-

°C