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Internal diagram and time diagram of the programming mechanisms (cont'd)
LGB22... / LGB32...
a
br
b
AS
I
a
b
AR
a b
a
b
II
VIII
MS
EK1
L1
2
10
8
9
EK2
AL
A
b
I
a
b
II
a
b
III
a
tw
t11 + t10
b
IV
a
b
V
a
b
VI
a
b
VII
a
b
VIII
a
b
IX
a
b
AR
a
b
FR
a
20/22
Building Technologies
HVAC Products
GP/
W
12
SB
1)
3
ar
a
b
a
b
III
IV
b
a
fr
a
b
V
VII
VI
IX
b
a
b
a
a
b
b
a
4
5
7
BV1
Z
BV2
Nur LGB22...
Nur LGB32...
1
ION
QRC1...
B
t1
t12
t3
t4
TSA
T = 81 s
L N
Legend
HS
R
0 I
AL
Alarm
AR
Load relay with contact «ar»
M
AS
Unit fuse
BR
Locking relay with contact «br»
LP
BV...
Fuel valve
6 11
EK...
Lockout reset button
FR
Flame relay
GP
Gas pressure switch
HS
Mains isolator
ION
Ionization probe
L1
Lockout warning lamp
LP
Air pressure switch
M
Fan motor
MS
Synchronous motor
R
Control thermostat or pressurestat
1
SB
Safety limit thermostat
W
Limit thermostat or pressure switch
Z
Ignition transformer
1
sw
br
12
bl
2
C
A
Start position (switching on)
B
Operating position of burner
C
Operating position of programming mechanism or start
position
I...IX
Cam switches
9
tw
Waiting time
TSA
Ignition safety time
T
Total running time of programming mechanism
4
t1
Prepurge time
t20
t3
Preignition time
7
t4
Interval «BV1 – BV2» or «BV1 – LR»
t10
Specified time for air pressure signal
t11
Programmed opening time for actuator «SA»
5
t12
Programmed closing time for actuator «SA»
t20
Interval up to self-shutdown of programming
3
mechanism
1)
Resistance between terminal 3 and «N» must not ex-
ceed 1.6 k Ω
CC1N7435en
11.01.2007
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