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Building Technologies Modular Heating Controller RMH760B CE1P3133en
HVAC Products Contents 05.02.2007
6.5.2 2-position control with 2-stage burner ...........................................................72
6.5.3 Control of burner’s basic stage and stage 2 .................................................. 72
6.5.4 Control of modulating burners .......................................................................75
6.5.5 External boiler temperature control ...............................................................78
6.6 Protective boiler functions .............................................................................78
6.6.1 Maximum limitation of the boiler temperature................................................ 79
6.6.2 Minimum limitation of the boiler temperature................................................. 79
6.6.3 Optimization of minimum boiler temperature................................................. 79
6.6.4 Protection against boiler overtemperatures................................................... 80
6.6.5 Pump kick and valve kick ..............................................................................80
6.6.6 Frost protection (release input Off)................................................................80
6.6.7 Frost protection for plant with boiler pump ....................................................80
6.6.8 Protective boiler startup.................................................................................80
6.6.9 Boiler shutdown .............................................................................................81
6.6.10 Frost protection for the boiler......................................................................... 82
6.6.11 Maintained boiler return temperature ............................................................82
6.6.12 Protection against pressure shocks...............................................................84
6.7 Flue gas temperature supervision .................................................................85
6.8 Flue gas measuring mode ............................................................................. 86
6.9 Boiler faults....................................................................................................86
6.10 Burner hours run counter and burner start counter......................................... 88
6.11 Fault handling ................................................................................................ 89
6.12 Text for boiler designation .............................................................................90
6.13 Diagnostic choices.........................................................................................90
7 Heat demand and heat requests ................................................................92
7.1 Heat requests ................................................................................................92
7.2 Heat demand outputs ....................................................................................93
7.3 Heat demand transformer.............................................................................. 94
8 Main controller and primary controller......................................................97
8.1 Overview of function block.............................................................................97
8.2 Configuration .................................................................................................97
8.3 Controller types .............................................................................................98
8.3.1 Mixing valve control .......................................................................................99
8.3.2 Pump control .................................................................................................99
8.4 Plant operation ..............................................................................................99
8.5 Heat demand and heat request ................................................................... 100
8.5.1 Heat request modulating .............................................................................101
8.5.2 Heat request 2-position ...............................................................................102
8.5.3 Heat demand outputs ..................................................................................102
8.5.4 Heat demand transformers..........................................................................103
8.6 Mixing valve control .....................................................................................103