Siemens Synco700 RMK770 Documentation Handbook page 6

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Building Technologies
HVAC Products
7.9.5 Boiler shutdown ...........................................................................................116
7.9.6 Protection against boiler overtemperatures .................................................117
7.9.7 Pump kick and valve kick.............................................................................117
7.9.8 Frost protection for the plant with boiler pump.............................................117
7.9.9 Frost protection for the boiler .......................................................................117
7.9.10 Protection against pressure shocks .............................................................118
7.10 Minimum limitation of the return temperature ..............................................118
7.11 Flue gas temperature supervision................................................................119
7.12 Flue gas measuring mode ...........................................................................120
7.13 Boiler faults ..................................................................................................121
7.14 Burner hours run counter and output balance .............................................123
7.15 Error messages............................................................................................123
7.16 Boiler designations.......................................................................................128
7.17 Diagnostic choices .......................................................................................129
8 Heat demand and heat requisitions .............................................................131
8.1 Heat requisitions ..........................................................................................131
8.2 Weather-compensated setpoint for boiler sequencing.................................132
8.3 Heat demand transformer ............................................................................132
9 Precontrol.....................................................................................................135
9.1 Function block overview...............................................................................135
9.2 Configuration................................................................................................136
9.2.1 Types of primary controllers.........................................................................136
9.2.2 Control of mixing valve.................................................................................137
9.2.3 Pump control................................................................................................137
9.2.4 Return temperature limitation primary controller..........................................137
9.3 Text designation of the primary controller....................................................138
9.4 Plant operation.............................................................................................138
9.5 Heat demand and heat requisition ...............................................................139
9.5.1 Heat requisition modulating .........................................................................139
9.5.2 Heat requisition 2-position ...........................................................................140
9.5.3 Heat demand transformers ..........................................................................141
9.6 Control of mixing valve.................................................................................141
9.6.1 General ........................................................................................................141
9.6.2 Load control .................................................................................................141
9.7 Setpoint boost mixing valve and system pump............................................141
9.8 Limit and protective functions ......................................................................142
9.8.1 Frost protection ............................................................................................142
9.8.2 Limitations....................................................................................................142
9.8.3 Pump overrun and mixing valve overrun .....................................................143
9.8.4 Pump kick and valve kick.............................................................................143
9.9 Error handling ..............................................................................................143
Boiler Sequence Controller RMK770
Contents
CE1P3132en
01.03.2005