Siemens LMV37.4 Series Basic Documentation page 74

Light oil direct ignition,
modulating
(Operating mode 4, 22)
(Operating mode 4, 22)
Fuel valve control
Figure 51: Light oil direct ignition - fuel valve control
74/267
Building Technologies
Modulating burner (without shutdown facility for adjustable head)
Program LO
P
min
1)
7546s07e/1107
Figure 49: Light oil direct ignition, modulating
Modulating burner (with shutdown facility for adjustable head)
Program LO
P
min
1)
Figure 50: Light oil ignition, modulating
Light oil (transformer for direct ignition) and heavy oil without separate circulation control
Air damper
position
Basic documentation LMV37.4...
7 Basic unit LMV37.4
V1
P
max
M
V1
P
max
M
MIN
7546f03e/0917
1)
7546s08e/1107
Legend for fuel trains:
1) Series connection of two DC 115 V
valves
Ho Heavy oil
Lo Light oil
No Normally Open
LK Air damper
P LT Valve proving
Pmax Pressure switch-max
Pmin Pressure switch-min
PV Pilot valve
SA Actuator
SV Safety valve (outdoors)
TSAx Safety time
V Fuel valve
Z Ignition
CC1P7546en
17.12.2018