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Siemens Building Technologies
Basic Documentation LMV5...
CC1P7550en
HVAC Products
3 Fuel train applications (examples)
13.08.2004
3
Fuel train applications (examples)
SV
V1
V2
Direct ignition
G
Program
7550s01E/0202
ACT
PS
max
PS
min
PS
VP
SV
V1
ACT
V2
Program
Gp1
Gas pilot
7550s02E/0202
PV
PS
min
PS
VP
PS
max
SV
PS
max
ACT
V2
Program
Gp2
Gas-Pilot
7550s17E/0202
PS
min
PV
V1
PS
VP
Gas
(always modulating)
Direct trafo ignition
G
PV
V1
V2
ts 1
ts 2
Operation
*)
Pilot ignition 1
Gp1
PV
V1
V2
Pilot ignition 2
Gp2
PV
V1
V2
755
0
f01
aE
/0
8
00
Legend to fuel trains:
*) Not
used
1)
Series connection of two 115 V
valves (each requiring approx. 25 VA
control
power)
2) Preheating
device
V Fuel
valve
VP
Gas valve proving
PS Pressure
switch
HE Heating
element
HO Heavy
oil
LO Light
oil
ACT Actuator
NO
N
ormally
O
pen
SV
Shutoff valve (outside the building)
PV Pilot
valve
Direct gas ignition
Gas pilot ignition 1
Gas pilot ignition 2
Fuel valve
control program