Limitation Of Modulation Range; End Of Operating Position - Siemens LMV36.520A1 Basic Documentation

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11.4.6 Limitation of modulation range

If the modulation range for stage 1 and stage 2, or stage 3, shall be further restricted, 4
parameters can be used to define a new low-fire and high-fire position.
No. Parameter
Lower output limit
545
undefined = 20 %
Fuel 1: Lower output limit
565
undefined = 20 %
546 Upper output limit
undefined = 100 %
566 Fuel 1: Upper output limit
undefined = 100 %

11.5 End of operating position

When there is no more heat request, the system switches to phase 62. Here, the burner
runs down to low-fire as long as possible before the valves are shut.
The available period of time can be set via parameter 212. If this time is set to the
minimum value, the burner is immediately shut down if there is no more request for
heat. If the time exceeds 32 seconds, the burner always runs to low-fire. Naturally, it is
also possible to set intermediate times.
No. Parameter
212 Max. time down to low-fire
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