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Building Technologies Basic documentation LMV37.4... CC1P7546en
7 Basic unit LMV37.4 17.12.2018
Indices
1) Parameter: Short/long prepurge time for oil only
Short/long oil pump – ON – time
2) Only with valve proving during startup
3) Parameter: With/without alarm in the event of start prevention
4) If signal is faulty in the startup phase, phase 10 is next, otherwise phase 70
5) Maximum time safety phase, then lockout
6) Time from occurrence of start prevention to signaling
7) Only in case of valve proving during startup (valve proving via pressure switch-
min)
8) Only in case of startup without valve proving (valve proving via pressure
switch-min)
9) Inverse logic in case of valve proving via pressure switch-min
10) Parameter 276: Oil: Input oil pressure min
1 = active from phase 38
2 = active from safety time
11) Only with fuel train Lo and 2 fuel valves
12) Parameter 223: Repetition limit value gas pressure switch-min in connection
with gas shortage program parameter 246 (phase 90)
1 = no repetition
2...15 = 1...14 number of repetitions
16 = constant repetition
13) Maximum drop-in/response time for air pressure switch
14) Alternative to valve proving
15) Alternative to pressure switch-max or POC
16) Parameter 286: Oil: Evaluation of heavy oil direct start
0 = only start signal in phase 38
1 = evaluation in phase 38…62
Abbreviations
AL Alarm
FS Flame signal
GM Fan motor contactor
LP Air pressure switch
M Fan motor
P LT Pressure switch for valve proving
Pmax Pressure switch-max
Pmin Pressure switch-min
POC Proof of closure
PV Pilot valve
R Temperature or pressure controller
SB Safety limiter
SK Safety loop
STB Safety limit thermostat
SV Safety valve
WM Water shortage
V1 Fuel valve V1
V2 Fuel valve V2
VP Combustion pressure switch
Z Ignition transformer
SA Actuator
SA-K Low-fire position of actuator
SA-N Postpurge position of actuator
SA-R Home position of actuator
SA-V Rated load position of actuator
SA-Z Ignition load position of actuator
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