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Connection examples
LGK16...
LOK16...
LOK16... / LGK16...
Siemens Building Technologies
HVAC Products
16
17 18 19
BV2
Z
BV1
N
7785a03/1295
19
17 9 20 11 10 8
18
LR
BV1
BV2
LK
N
7785a09/0396
13
12
14
4
5
R
W
d1/d2
M1
N
7785a11/0196
3
12
13 14
4
I
AL
W
GP
LP
L3
N
7785a05/1295
The burner is switched off manually by pressing button «0», or automatically by the limit
thermostat or pressure switch «W», or by gas pressure switch «GP».
«L3» indicates when the burner control is ready to be started; it extinguishes shortly af-
ter the burner is switched on.
For the other connections, refer to the connection diagrams.
19
20
9
11
10 8
LR
SA
v
a
z
M
BV2
7785a08/0196
N
19
20
9 11 10 8
BV2
BV3
N
7785a10/0396
Doubling of safety time with expanding flame burners
when using burner control LGK16.335... or LGK16.635...
By connecting terminals 17 and 18, the safety time is
doubled and the preignition time reduced by 50 %.
Before using this circuit, it must be ensured that the
longer safety time is in compliance with national stan-
dards and regulations!
6
Control of the air damper actuator during operation by
feeding control signals to terminal 17
6
Wiring required for operation without air pressure supervi-
sion
d1
If an auxiliary contact of the fan contactor is included in
the circuit as shown in the diagram, ignition and fuel re-
lease are possible only when the contact is closed.
5
Semiautomatic startup
The burner is switched on manually by pressing button
0
«I».
Then, the burner control programs the startup sequence
and flame supervision.
Connection of air damper actuators without changeover
end switch for the fully closed position.
LK
«Z» is set to low-fire
6
Control of a fuel valve by terminal 20 in the case of burn-
ers without air damper or with an air damper not con-
trolled by the burner control.
The relay is not required if the valve connected to terminal
20 is hydraulically series-connected to a valve controlled
by terminal 18 or 19.
If no air damper actuator is used, terminal 8 must be con-
nected to terminal 6.
17/20
CC1N7785en
15.10.2003
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