Legend To The Sequence Diagrams - Siemens LMV37.4 Series Basic Documentation

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7.7.8 Legend to the sequence diagrams


Note
Not all phases, times, indices, abbreviations and symbols appear in the
individual sequence diagrams or are needed there!
Phase numbers
00 Lockout phase
02 Safety phase
10 Home run
12 Standby (stationary)
22 Fan motor = ON, safety valve = ON
Air damper  pre purge position
24
30 Prepurging
Fan  ignition speed
35
Air damper  ignition position
36
38 Preignition ignition = ON
39 Test pressure switch-min
40 Fuel valve = ON
42 Ignition = OFF
44 Interval 1
50 Second safety time
52 Interval 2
60 Operation 1 (stationary)
Operation 2 (air damper  low-fire position)
62
64 Switching back to pilot: Modulation to ignition load
65 Switching back to pilot: Interval 2 waiting time
66 Switching back to pilot: Reactivation of ignition + pilot
67 Switching back to pilot: Shutdown of main valves
68 Switching back to pilot: Pilot mode waiting phase
69 Switching back to pilot: Pilot mode waiting phase for burner startup
70 Afterburn time
Fan  postpurge speed
71
Air damper  Rated load position
72
74 Postpurge time
78 Postpurge time
Fan  standby speed
79
80 Evacuation of test space
81 Test time atmospheric pressure
82 Filling of test space
83 Test time gas pressure
90 Gas shortage waiting time
Valve proving is performed depending on the parameter settings:
Simultaneously with the prepurge time and/or the afterburn time.
Times
TSA1 1st safety time
TSA2 2nd safety time
t1 Prepurge time
t3 Postpurge time
t8 Postpurge time
t13 Afterburn time
t44 Interval 1
t52 Interval 2
Basic documentation LMV37.4...
7 Basic unit LMV37.4
CC1P7546en
17.12.2018