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Connection examples with vent pipe to atmosphere using burner controls type LFE..., LFL... or LGK..., or the
control unit LEC...
For other connections, refer to the connection diagram of the relevant burner control.
Check just prior to burner startup
2)
Expanding flame burner or interrupted pilot burner
LFE1
8
LEC1
LFL1...
4
LGK16...
W
R
EK2
18
5
6
3
4
1
DW
16
III
ar2
17
15
14
GP
E
C
N
Valve proving test with 2 pressure switches
DW
Pressure switch for the valve proving test with gas pressure.
G
This pressure switch must be set to the minimum gas pressure permitted during the proving test.
If this pressure is not reached during the test, lockout will be initiated.
DW
Pressure switch for the gas valve proving test with atmospheric pressure.
A
This pressure switch must be set to the maximum gas pressure permitted during the proving test with at-
mospheric pressure.
If this pressure is exceeded during the test, lockout will be initiated.
Pressure switch (DW
) and pressure switch (DW
G
Plants with vent pipe (C) to atmosphere
Building Technologies Division
7696a07/0401
9
5°/10°°
2)
18°/17°°
5
2)
A
N
8
10
19
23
20
12
hr2
I
V
XI
hr1
2
11
7
9
LDU11
B
DW
DW
G
A
7696a09/0796
SKP7...
LDU
DW
B
C
LDU
DW
B
C
Check during the prepurge time (min. 60 seconds)
2)
Expanding flame burner or interrupted pilot burner
LFE1
8
LEC1
LFL1...
4
LGK16...
W
R
EK2
22
21
24
18
1
DW
16
ar2
17
N
15
14
13
AL
GP
E
N
) must be overload-proof up to the gas pressure value.
A
16
17
15
A
A
9
18
19
4
5°/10°°
5
12
13
14
18°/17°°
A
N
LP
8
10
4
5
6
12
3
III
I
V
2
7
9
C
LDU
DW
A2
B
C
7696s02/0709
LDU
DW
C
) ( RB
B
A
7696a08/0401
2)
2)
19
23
20
22
21
24
hr2
XI
hr1
N
11
13
LDU11
AL
B
13/21
CC1N7696en
20.04.2016
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