Siemens LMV37.4 Series - Page 74

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Building Technologies Basic documentation LMV37.4... CC1P7546en
7 Basic unit LMV37.4 17.12.2018
Modulating burner (without shutdown facility for adjustable head)
P
max
1)
M
P
min
V1
7546s07e/1107
1)
LO
Program
Figure 49: Light oil direct ignition, modulating
Modulating burner (with shutdown facility for adjustable head)
1)
V1
M
7546s08e/1107
P
min
P
max
LO
Program
Figure 50: Light oil ignition, modulating
Light oil (transformer for direct ignition) and heavy oil without separate circulation control
V3
V2
MIN
Multistage operation
HO Without circulation control
7546f03e/0917
LO
Operation
Air damper
position
Figure 51: Light oil direct ignition - fuel valve control
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
Light oil direct ignition,
modulating
(Operating mode 4, 22)
(Operating mode 4, 22)
Fuel valve control