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Connection diagram
9
11
8
1 2
3
SB
W
R
H
Si
L
N
1 2
6
8
9
11
SB
LP
W
M
1)
R
H
Si
L
N
Legend
10/11
Siemens Building Technologies
HVAC Products
FR
7
4
5
10
Z
BV2
AL
BV1
7418a04/0304
LGA52... / 63...
FR
7
4
5
10
Z
AL
BV1
BV2
AL
Fault status signal
BV...
Fuel valve
ION
Ionization probe
FR
Flame relay
FS
Flame signal
LP
Air pressure switch
H
Main switch
Required input signals
Burner control's output signals
A
Commencement of startup sequence
B
Time of flame establishment
t1
Prepurge
t3
Preignition time
t3´
Preignition time from the start of «TSA»
A
LGA41...
SB
R/W
6
12
Z
ION
BV1
BV2
FS
A
SB
R/W
12
LP
ION
M
9
6
7418a05/0304
Z
BV1
BV2
FS
Control sequence
B
C
t3
t3n
TSA
t4
7418f01/0200
B
C
t1
t3´
t4
TSA
7418f02/0200
M
Auxiliary fan
R
Thermostat or pressurestat
SB
Safety limit thermostat
Si
External primary fuse
W
Limit thermostat
Z
Ignition transformer
1)
Not monitored to EN 298
C
Operating position
D
Controlled shutdown by «R»
t3n
Postignition
t4
Interval «BV1 – BV2»
TSA
Ignition safety time
D
1
7
4
5
12
D
1
11
8
9
6
7
4
5
12
CC1N7418en
08.04.2004
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