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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
