Siemens LEC1/8853 Manual page 11

Connection Examples
and Time Diagrams
Double or multi-flame
supervision of oil
burners
Important
CC1N7761E
For connection examples for the flame supervision with DETACTOGYR LFE50... see
data sheet 7783.
Start-up with long pre-ignition (t3) and supervised air damper control. Air pressure
supervision from the start to the controlled shutdown. No load control. Necessary flame
safeguards: type LAE10... with selenium photocell detector RAR...
16 1 2 13 14
FW
4
3
SB
EK2
H
7 5
M1 M2
M M
FW
3 4
c1 c2
7
5
e1 e2
(LAE10...)
P N
(R) (Mp)
LK
M
Luft
Öl
OV3
OV2
7761a04/0696
OV1
Air damper control, detailed
In case of burners without air damper or with an air damper not controlled by the control unit, terminals 20, 21 and
22 must be interconnected; the path 18-c1-21 of the circuit, however, must be omitted!
* Connection is dropped with the use of an air pressure monitor LP
A B
t8
M1 Kl.3
t7
M2 17
t11
t1 t12
LK
22/21
t2
Z 6
t3
OV1 5
t4
OV2
7
OV3
11
FW 13/14
L2
12
LEC1...
15 12 19 18 8 9 4 3
* *
6
c1 e1
c1
LP
6
P T
R1
T
W
L2
7761a03/0696
A
22
21
21/d1
18/c1/d1
20
LK"a"
LK"z"
t11 t1
C D E F
tn
t6
t5
7761d02/0696
UL.2
22 21 20 17 6 5 7
e2 d1
d1
c2
OV2
1 2 12 11
a z
OV1
M
N
Z
LK
B C
7761d03/0696
t12 t11 tn t6
G H I
11
d1
OV3
D E
t12
K L
t6
t7
t1
t2
t3
t4
t5
11