Siemens LGB22.330A27 - Page 17

17/22
Building Technologies CC1N7435en
HVAC Products 11.01.2007
Connection diagrams (cont’d)
LGB22... / LGB32...
HS
0
4N15
N
I
L
A
b1
a1
LGB22...
R/W
GP
12
AL
EK2
3
8
3 2
68
7
b2
a2
M
B
Z
LR
ION
BV1
4
1
12
10
9
5
7
BV2
IIIIIIIV
2
6
11
LP
M
Si
SB
N
I
HS
L
LGB22...
R/W
GP
12
EK2
38
Z
LR
5
ION
BV1
BV2
0
7435a17/0704
B
C
A
a1
b1
c1
b2
a2
M
7
9102
N5 4 1 3 2 867
IIIII IVI
6 11
AL
4
1
M
LKP
Zu
KL
NL
t
IIIIII
IVIV
II
II
t1
TSA
t4
LP
Si
SB
5
2
SQN7...454 / 2-stage control
Single-wire control
SQN7...424 / 2-stage control
2-wire control
Burner without fan and without «LP»
LGB22... / LGB32...
23
11 6
AGK25
7435a04/0398
QRA... with auxiliary unit AGQ1... with LGB22... (diagram 7435a06)
12
2
11
1
7435a06/0704
GP/SB
R/W
L
L
N
QRA
+
-
br
bl
rt
sw
AGQ1
sw bl
Burner with fan control via auxiliary contactor («HS») with «LP»
LGB22... / LGB32...
12 2 3
11
6
GP/SB
R/W
L
N
M
HS
AGK25
LP
7435a16/1299
Legend
bl Blue wire
br Brown wire
rt Red wire
sw Black wire
TSA Ignition safety time
t1 Prepurge time
t4 Interval «BV1 – BV2»
LGB22... / LGB32...: interval «BV1 - LR»
AL Alarm LR Load controller
BV... Fuel valve M Fan motor
EK2 Remote reset button NL Nominal load
ION Ionization probe R Control thermostat or pressurestat
GP Gas pressure switch SB Safety limit thermostat
HS Mains isolator Si Primary fuse
KL Low-fire W Limit thermostat
LKP Air damper position Z Ignition transformer
LP Air pressure switch
Legend