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
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