17/21
Building Technologies Division
CC1N7696en
20.04.2016
Connection examples without vent pipe to atmosphere using burner controls type LFE..., LFL... or LGK..., or
control unit LEC... and actuator SKP7... with expanding flame burners
For other connections, refer to the connection diagram of the relevant burner control
Check just prior to burner startup
Check during the prepurge time (min. 60 seconds)
LDU11
22
GP
E
N
B
A
2
W
6
14
15
18
1
ar
2
III
EK2
17
16
DW
4
5
3
LP
14
8
18
19
4
9
12
13
LFE1
LEC1
LFL1...
LGK16...
R
5
4
N
hr2
11
20
19
hr1
XI
23
12
7
8
I
9
10
V
5°
18°
T
AL
M
13
24
21
N
6/7
3/17
7696a26/0401
LDU11
GP
E
N
B
A
2
LP
W
6
14
15
18
1
ar2
III
EK2
17
16
DW
4
5
3
14
8
18
19
4
9
12
13
LFE1
LEC1
LFL1...
LGK16...
R
4
5
hr2
11
20
19
hr1
XI
23
12
7
8
I
9
10
V
M
5°
18°
AL
13
24
21
N
22
N
6/7
3/17
7696a27/0401
Valve proving test with 2 pressure switches
DW
G
Pressure switch for the valve proving test with gas pressure. This pressure switch must be set to the mini-
mum gas pressure permitted during the proving test. If this pressure is not reached during the test, lockout
will be initiated.
DW
A
Pressure switch for the gas valve proving test with atmospheric pressure. This pressure switch must be set
to the maximum gas pressure permitted during the proving test with atmospheric pressure. If this pressure
is exceeded during the test, lockout will be initiated.
Pressure switch (DW
G
) and pressure switch (DW
A
) must be overload-proof up to the gas pressure level.
16
17
DW
G
DW
A
15
7696a09/0796
Plants without vent pipe to atmosphere
GP
B
E
D W
A
SKP7...
