Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies Contents 2017-09-29
9.8.2 Limitation of the return temperature ................................................................................. 134
9.8.3 Minimum limitation of the return temperature ................................................................... 135
9.8.4 Frost functions and general protective functions .............................................................. 135
9.8.5 Pulse limitation ................................................................................................................. 136
9.8.6 Pump overrun and mixing valve overrun .......................................................................... 137
9.8.7 Pump kick and valve kick ................................................................................................. 137
9.9 Heat demand ................................................................................................................... 137
9.10 Auxiliary functions ............................................................................................................ 138
9.10.1 Text designation .............................................................................................................. 138
9.10.2 Acquisition of the room temperature ................................................................................. 138
9.10.3 Room control combination ............................................................................................... 140
9.11 Fault handling .................................................................................................................. 142
9.12 Diagnostic choices ........................................................................................................... 144
10 DHW heating............................................................................................... 146
10.1 Overview of function block ............................................................................................... 146
10.2 Configuration ................................................................................................................... 147
10.2.1 General ............................................................................................................................ 147
10.2.2 DHW plant types .............................................................................................................. 148
10.2.3 3-position or modulating mixing valve .............................................................................. 150
10.2.4 Pump control.................................................................................................................... 150
10.3 Operating modes and setpoints ....................................................................................... 150
10.3.1 DHW operating modes ..................................................................................................... 150
10.3.2 User request via digital inputs .......................................................................................... 151
10.3.3 Plant operation ................................................................................................................. 152
10.3.4 Control priorities in DHW heating mode ........................................................................... 153
10.3.5 DHW setpoints ................................................................................................................. 154
10.4 Storage tank charging ...................................................................................................... 155
10.4.1 Charging control via the storage tank temperature ........................................................... 155
10.4.2 Forced charging ............................................................................................................... 157
10.4.3 Maximum charging time ................................................................................................... 158
10.4.4 Maintained secondary circuit ............................................................................................ 159
10.5 Direct DHW heating ......................................................................................................... 160
10.5.1 Adapting the control parameters ...................................................................................... 160
10.5.2 Requirements for the plant ............................................................................................... 162
10.5.3 Flow switch ...................................................................................................................... 163
10.5.4 Maximum charging time ................................................................................................... 164
10.5.5 Legionella protection with direct DHW heating ................................................................. 164
10.6 Legionella protection ........................................................................................................ 164
10.6.1 General ............................................................................................................................ 165
10.6.2 Sequence of legionella function ....................................................................................... 165
10.6.3 Legionella function relay .................................................................................................. 167
10.7 Primary control ................................................................................................................. 168
10.7.1 Primary temperature setpoint ........................................................................................... 168