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Building Technologies Modular Heating Controller RMH760B CE1P3133en
HVAC Products Contents 05.02.2007
9.7.3 Quick setback and boost heating ................................................................133
9.8 Limit and protective functions ......................................................................134
9.8.1 Maximum limitation of the room temperature ..............................................134
9.8.2 Limitation of the return temperature ............................................................135
9.8.3 Minimum limitation of the return temperature .............................................. 137
9.8.4 Frost functions and general protective functions .........................................137
9.8.5 Pulse limitation ............................................................................................138
9.8.6 Pump overrun and mixing valve overrun .....................................................139
9.8.7 Pump kick and valve kick ............................................................................139
9.9 Heat demand ............................................................................................... 139
9.10 Auxiliary functions........................................................................................ 140
9.10.1 Text designation ..........................................................................................140
9.10.2 Acquisition of the room temperature............................................................ 140
9.10.3 Room control combination........................................................................... 142
9.11 Fault handling .............................................................................................. 143
9.12 Diagnostic choices.......................................................................................146
10 DHW heating ..............................................................................................147
10.1 Overview of function block...........................................................................147
10.2 Configuration ...............................................................................................148
10.2.1 General........................................................................................................148
10.2.2 DHW plant types..........................................................................................149
10.2.3 3-position or modulating mixing valve .........................................................150
10.2.4 Pump control ...............................................................................................151
10.3 Operating modes and setpoints................................................................... 151
10.3.1 DHW operating modes ................................................................................151
10.3.2 User request via digital inputs .....................................................................152
10.3.3 Plant operation ............................................................................................153
10.3.4 Control priorities in DHW heating mode ...................................................... 153
10.3.5 DHW setpoints.............................................................................................155
10.4 Storage tank charging .................................................................................156
10.4.1 Charging control via the storage tank temperature ..................................... 156
10.4.2 Forced charging........................................................................................... 158
10.4.3 Maximum charging time ..............................................................................159
10.4.4 Maintained secondary circuit .......................................................................159
10.5 Direct DHW heating..................................................................................... 160
10.5.1 Adapting the control parameters .................................................................161
10.5.2 Requirements for the plant ..........................................................................163
10.5.3 Flow switch ..................................................................................................163
10.5.4 Maximum charging time ..............................................................................165
10.5.5 Legionella protection with direct DHW heating............................................ 165
10.6 Legionella protection ...................................................................................165
10.6.1 General........................................................................................................165