Minimum Room Temperature Protection

The minimum room temperature protection ensures a minimum room temperature condition during un-occupied periods. If the room temperature drops below the value of the setting RMT-02, the mixed water temperature setpoint is set to the value Tprot. Tprot can be adjusted with parameter RMT-02 and RMT-03 to avoid heating with the maximum mixed water temperature.

Tprot = HC (RMT-02 + RMT-03 + 2K, FilteredOATemp, HCA-01, HCA-02)

The minimum room temperature protection function ends, if the room temperature has been increased by the differential RMT-03 above RMT-02. This leads to the fastest possible heat up of the room, but also forces the heat generator to supply a high setpoint. Next figure shows the minimum room temperature protection function.

Fig. 7.   Minimum room temperature protection

Table 6.   Parameter List

Description

Value Range

Default Value

Unit

MWT-03: maximum mixed water temperature

0...150

82

°C

RMT-02: minimum room temperature

0...20

13

°C

RMT-03: differential minimum room temperature

0...5

2

K