Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies Contents 2017-09-29
6.5.3 Control of burner’s basic stage and stage 2 ....................................................................... 71
6.5.4 Control of modulating burners ............................................................................................ 73
6.5.5 External boiler temperature control .................................................................................... 77
6.6 Protective boiler functions .................................................................................................. 77
6.6.1 Maximum limitation of the boiler temperature ..................................................................... 78
6.6.2 Minimum limitation of the boiler temperature ...................................................................... 78
6.6.3 Optimization of minimum boiler temperature ...................................................................... 78
6.6.4 Protection against boiler overtemperatures ........................................................................ 79
6.6.5 Pump kick and valve kick ................................................................................................... 79
6.6.6 Frost protection (release input Off) ..................................................................................... 79
6.6.7 Frost protection for plant with boiler pump .......................................................................... 79
6.6.8 Protective boiler startup ..................................................................................................... 80
6.6.9 Boiler shutdown ................................................................................................................. 80
6.6.10 Frost protection for the boiler ............................................................................................. 81
6.6.11 Maintained boiler return temperature ................................................................................. 81
6.6.12 Protection against pressure shocks .................................................................................... 84
6.7 Flue gas temperature supervision ...................................................................................... 84
6.8 Flue gas measuring mode .................................................................................................. 85
6.9 Boiler faults ........................................................................................................................ 85
6.10 Burner hours run counter and burner start counter ............................................................... 88
6.11 Fault handling .................................................................................................................... 88
6.12 Text for boiler designation .................................................................................................. 89
6.13 Diagnostic choices ............................................................................................................. 89
7 Heat demand and heat requests................................................................. 91
7.1 Heat requests .................................................................................................................... 91
7.2 Heat demand outputs ......................................................................................................... 92
7.3 Heat demand transformer .................................................................................................. 93
8 Main controller and primary controller ....................................................... 95
8.1 Overview of function block ................................................................................................. 95
8.2 Configuration ..................................................................................................................... 95
8.3 Controller types .................................................................................................................. 96
8.3.1 Mixing valve control ........................................................................................................... 97
8.3.2 Pump control...................................................................................................................... 97
8.4 Plant operation ................................................................................................................... 97
8.5 Heat demand and heat request .......................................................................................... 98
8.5.1 Heat request modulating .................................................................................................... 99
8.5.2 Heat request 2-position .................................................................................................... 100
8.5.3 Heat demand outputs ....................................................................................................... 101
8.5.4 Heat demand transformers .............................................................................................. 101
8.6 Mixing valve control ......................................................................................................... 101
8.6.1 General ............................................................................................................................ 101
8.6.2 Load control ..................................................................................................................... 101