Siemens RVS41.813 - Page 6

Overview ......................................................................................................112
Primary controller / system pump ................................................................112
6.12 Heat pump ...................................................................................................112
Function diagrams .......................................................................................113
Condenser pump .........................................................................................114
Source pump................................................................................................115
Compressor control in plants without buffer or combi storage tank .............116
Overview of setpoint and control sensor selection.......................................117
Compressor control in plants with buffer or combi storage tank ..................118
Compressor settings ....................................................................................119
Compressor 2 ..............................................................................................122
Electric immersion heater in the flow ...........................................................124
Heat pump protection during DHW charging ...............................................126
General parameters .....................................................................................127
Heat pump protection during DHW charging ...............................................128
Defrost function for air-to-water heat pumps................................................130
Automatic defrost function ...........................................................................131
Frost protection for the heat pump...............................................................134
Cooling.........................................................................................................134
Sensor calibration. .......................................................................................137
6.13 Energy meter ...............................................................................................139
Heat volume meter.......................................................................................141
Energy counter electricity/natural gas..........................................................143
Counter/performance factor .........................................................................144
Fixed day storage (yearly performance factor) ............................................145
6.14 Cascade.......................................................................................................148
Control .........................................................................................................148
Heat source sequence .................................................................................148
Electric immersion heaters in the cascade ..................................................149
6.15 Supplementary source (only RVS41...)........................................................150
Operating mode ...........................................................................................150
Overtemperature protection .........................................................................150
Control .........................................................................................................150
6.16 Solar.............................................................................................................152
Overview ......................................................................................................152
Charging controller (dT) ...............................................................................152
Priority..........................................................................................................153
Start function................................................................................................154
Collector frost protection ..............................................................................154
Overtemperature protection for the collector ...............................................154
Medium’s evaporation temperature .............................................................155
Speed control...............................................................................................155
Yield measurement ......................................................................................155
6.17 Buffer storage tank.......................................................................................156
Overview ......................................................................................................156
Forced charging ...........................................................................................156
Automatic locks............................................................................................157
Stratification protection ................................................................................159
Overtemperature protection .........................................................................159
Recooling .....................................................................................................160
Electric immersion heater ............................................................................160
Solar integration...........................................................................................161
6.18 DHW storage tank........................................................................................161
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Siemens Switzerland Ltd User manual RVS61.843, RVS41.813 CE1U2355en_02
HVAC Products Contents 28. September 2009