Siemens VALVEGYR LDU11.523A17 Manuale d'uso - Pagina 17
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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
LFE1
8
9
19
4
18
LEC1
LFL1...
4
5
12
13
14
LGK16...
W
R
LP
EK2
6
18
5
3
4
DW
16
1
III
17
15
14
2
GP
E
N
Valve proving test with 2 pressure switches
DW
Pressure switch for the valve proving test with gas pressure. This pressure switch must be set to the mini-
G
mum 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. This pressure switch must be set
A
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
) and pressure switch (DW
G
Plants without vent pipe to atmosphere
Building Technologies Division
7696a26/0401
5°
18°
T
N
8
22
21
10
12
19
23
20
hr2
I
V
XI
hr1
9
11
7
LDU11
A
B
A
DW
DW
G
A
7696a09/0796
GP
D W
E
B
Check during the prepurge time (min. 60 seconds)
LFE1
3/17
8
9
LEC1
6/7
LFL1...
4
5
LGK16...
W
M
R
EK2
24
18
3
1
DW
16
N
ar2
17
13
15
14
AL
GP
E
N
) must be overload-proof up to the gas pressure level.
16
17
15
SKP7...
A
18
19
4
5°
12
13
14
18°
LP
M
4
5
6
8
10
12
III
I
V
XI
11
2
9
7
B
A
7696a27/0401
3/17
6/7
N
19
20
22
21
24
23
hr2
hr1
N
13
LDU11
AL
17/21
CC1N7696en
20.04.2016