Siemens LMV37.4 Series Basic Documentation page 5

Building Technologies
7.7.2 Gas pilot ignition 1 «Gp1», «Gp1 mod», «Gp1 mod pneu» ........................... 82
7.7.3 Gas pilot ignition 2 «Gp2», «Gp2 mod», «Gp2 mod pneu» ........................... 83
7.7.4 Light oil direct ignition «Lo», «Lo mod», «Lo 2-stage», «Lo 3-stage» ........... 84
7.7.5 Light oil pilot ignition «LoGp» «LoGp mod» «LoGp 2 stage» ........................ 85
7.7.6 Heavy oil direct ignition «Ho», «Ho mod separate circulation control», «Ho 2-
stage separate circulation control» ................................................................ 86
7.7.7 Heavy oil direct ignition «Ho», «Ho mod without circulation control», «Ho 2-
stage without circulation control», «Ho 3-stage without circulation control» . 87
7.7.8 Legend to the sequence diagrams ................................................................ 88
8 Selection of operating mode ...................................................................... 91
8.1 Deleting curves .............................................................................................. 93
9 Connection to load controllers .................................................................. 94
9.1 Load controller ON contact X5-03 pin 1 ........................................................ 94
9.2 External load controller via contacts X5-03, pin 2 / pin 3 ............................... 94
9.3 Default output via building automation - X92 ................................................ 97
9.4 Manual output ................................................................................................ 99
9.5 Output with curve settings ............................................................................. 99
9.6 External load controller via analog input X64 pin 1 / X64 pin 2 ................... 100
9.6.1 Switching thresholds for modulating operation ............................................ 100
9.6.2 Switching thresholds for multistage operation ............................................. 101
9.7 Prioritization of load controller sources ........................................................ 102
9.7.1 Emergency operation with several load controller sources ......................... 103
9.7.2 Manual control ............................................................................................. 103
10 Electronic ratio control ............................................................................. 104
10.1 General ........................................................................................................ 104
10.2 Behavior outside the operating positions ..................................................... 104
10.2.1 Traveling speed ........................................................................................... 104
10.2.2 Home position .............................................................................................. 104
10.2.3 Prepurging ................................................................................................... 105
10.2.4 Ignition ......................................................................................................... 105
10.2.5 Postpurging ................................................................................................. 105
10.3 Modulating operation ................................................................................... 106
10.3.1 Definition of curves ...................................................................................... 106
10.3.2 Traveling speed / maximum curve slope ..................................................... 107
10.3.3 Entering the running position ....................................................................... 108
10.3.4 Operating position ....................................................................................... 108
10.3.5 Limitation of modulation range .................................................................... 109
10.3.6 Setting the minimum and maximum output ................................................. 110
10.4 Multistage operation .................................................................................... 111
10.4.1 Definition of curves ...................................................................................... 111
10.4.2 Traveling speed ........................................................................................... 111
10.4.3 Adjustment of output .................................................................................... 112
10.4.4 Entering the operating position .................................................................... 112
10.4.5 Operating position ....................................................................................... 112
10.4.6 Limitation of modulation range .................................................................... 113
10.5 End of operating position ............................................................................. 113
Basic Documentation LMV37.4...
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CC1P7546en
17.12.2018