Siemens LGB21.130A17 Datasheet page 18

Connection diagrams (cont'd)
LGB41...
Burner controls for atmospheric gas burners with or without fan. No actuator control. Flame supervision with ionization probe
A
tw
GP/SB
R/W
Z
BV1
ZV1
BV2
FS
12 2 10 8 3 6
Dbr2
GP/
bv1
SB
zv1
W bv2
AL
M
R
EK2
HS
0
L
N
ION
HR
BV2
BV1
Legend
A Startup (switching on by «R»)
B – B´ Interval for establishment of flame
C Operation position of burner or release of the second stage
by load controller «LR»
D Shutdown by «R»
tw Waiting time
TSA Ignition safety time
t3 Preignition time
t4 Interval «BV1 – BV2»
t9 2. safety time
Required input signals
Burner control's output signals
•
Connection of valves with pilot burners with main flame
supervision
••
Connection of valves with 2-stage atmospheric burners
with supervision of the first stage («BV1»)
18/22
Building Technologies
HVAC Products
B B´ C
t3
TSA
t4
t9
7435f03/0301
11 7 9 4 5
1
Dbr1
ION
BV2
Z
ZV1 BV1
7435a11/0704
ION2 ION1
ZR
HR
BV2
ZV1
D
12
7
4
11
5
1
QRA... with auxiliary unit AGQ1... with LGB4... (Pictures
7435a21)
12 2
GP/SB
R/W
L
br bl rt
L
AGQ1 sw
N
7435a21/0704
QRA
AL Alarm
BV... Fuel valve
bv... Auxiliary switch in the fuel valves (for control the closed position)
Dbr1 Wire link
Dbr2 Wire link, required when contacts «bv» or «zv1» is missing
EK2 Remote reset button
ION Ionization probe
FS Flame signal
GP Gas pressure switch
HR Main ramp
HS Main switch
M (Auxiliary) fan motor
QRA... UV flame detector
QRC... Blue flame detector
bl Blue wire
br Brown wire
rt Red wire
sw Black wire
R Control thermostat or pressurestat
SB Safety limit thermostat
Si Primary fuse
W Limit thermostat
Z Ignition transformer
ZR Ignition ramp
ZV1 Ignition gas valve
zv1 Auxiliary switch in ignition gas valve
1
3
sw
bl
+
-
CC1N7435en
11.01.2007