Program Sequence; Time Parameters - Siemens LMV37.4 Series Basic Documentation
Basic unit with integrated fuel-air ratio control for forced draft burner
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7.5 Program sequence
The program sequence is shown in the form of sequence diagrams (refer to chapter
Fuel trains). Using a number of parameters, the program sequence can be adapted to
the respective application.
7.5.1 Time parameters
Using a number of time parameters, the time characteristics of the different types of fuel
trains can be matched to the requirements of the respective application.
No.
Parameter
192
Switching back to pilot minimum time
193
Switching back to pilot maximum time
211
Fan ramp up time
212
Maximum time to low-fire
213
Waiting time home run
214
Maximum time to start release
Max. waiting time for detecting a detector or pressure switch signal (e.g. home
217
run, preignition)
225
Gas: Prepurge time
226
Gas: Preignition time
227
Gas: First safety time
229
Gas: Time to respond to pressure faults in the first and second safety time
230
Gas: Interval 1
231
Gas: Second safety time
232
Gas: Interval 2
233
Gas: Afterburn time
234
Gas: Postpurge time (no extraneous light test)
242
Gas: Valve proving - test space evacuating
243
Gas: Valve proving - test time atmospheric pressure
244
Gas: Valve proving - test space filling
245
Gas: Valve proving - test time gas pressure
246
Gas: Gas shortage waiting time
248
Gas: Postpurge time (abortion if load controller ON)
LMV37.400Ax
249
Gas: Prepurge time (OEM)
265
Oil: Prepurge time
266
Oil: Preignition time
267
Oil: First safety time
269
Oil: Time to respond to pressure faults in the first and second safety time
270
Oil: Interval 1
271
Oil: Second safety time
272
Oil: Interval 2
273
Oil: Afterburn time
274
Oil: Postpurge time (no extraneous light test)
284
Oil: Postpurge time (abortion if load controller ON)
287
Oil: Maximum until time heavy oil start signal
288
LMV37.400Ax
Oil: Prepurge time (OEM)
Caution!
The OEM or the heating engineer must make certain that the times conform to
the standards covering the respective type of plant.
Basic documentation LMV37.4...
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CC1P7546en
17.12.2018
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