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Building Technologies CC1N7435en
HVAC Products 11.01.2007
Internal diagram and time diagram of the programming mechanisms (cont’d)
LGB41...
Legend
AL Alarm
AR Load relay with contact «ar»
AS Unit fuse
BR Locking relay with contact «br»
BV... Fuel valve
Dbr1 Wire link
Dbr2 Wire link terminal 6-2 required when contact «bv» or «zv1»
is missing
EK... Lockout reset button
FR Flame relay
GP Gas pressure switch
HR Main burner
HS Mains isolator
ION Ionization probe
L1 Lockout warning lamp
M Fan motor
MS Synchronous motor
R Control thermostat or pressurestat
SB Safety limit thermostat
W Limit thermostat or pressure switch
Z Ignition transformer
ZR Pilot burner
ZV1 Pilot gas valve in place of «BV1» in the case of pilot
burners with main flame supervision
tw Waiting time
TSA Ignition safety time
T Total running time of programming mechanism
t3 Preignition time
t4 Interval «BV1 – BV2»
t9 Second safety time
t20 Interval up to self-shutdown of the programming
mechanism
A Start position ( switching on)
B Operating position of burner
C Operating position of programming mechanism or start
position
I...IX Cam switches
1) Resistance between terminal 3 and «N» must not exceed
GP/
SB
W
R
M
HS
L
N
7435i03/0504
ION
Dbr1
Z
BV1
Dbr2
EK2
AL
EK1
a
b
AS
br
12
I
a
b
a
b
ar
1)
3
III
b
a
FR
AR
MS
8
VIII
a
b
II
a
b
BR
L1
210 11 46579
1
VII
b
b
a
IX
VI
b
a
IV
a
V
a
fr
a
b
BV2
ZV1
0
I
A
B
C
6
11
4
7
5
tw t3
TSA
t4 t20
t9
a
b
AR
FR
T = 40,5 s
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
I
II
III
IV
V
VI
VII
VIII
IX
7435f06/0301
ION
HR
BV1
BV2
7435s01/0504
ION2 ION1
ZR
HR
BV2 ZV1
7435s02/0504
1.6 kΩ
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