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Type summary
The switching times are given in seconds, in the order of the startup sequence, valid for a frequency of 50 Hz. At 60 Hz, the times are about
20 % shorter. The type references apply to burner controls operating on AC 230 V, 50...60 Hz.
*
For burner controls operating on AC 100...110 V, 50...60 Hz, the last 2 digits of the type reference read «17» in place of «27».
LOK16...
For flame supervision with a selenium photocell detector RAR7... or
RAR8... for oil burners
Preferred use:
Flash-steam gen-
erators
LOK16.140A27*
t1
10
TSA
4
TSA´
---
t3
2
t3´
From startup command (with air pressure supervision: From re-
ceipt of air pressure signal)
t3n
10
t4
8
t4´
---
t5
4
t6
10
t7
2
t8
30
t9
---
t10
6
t11
Optional
t12
Optional
t13
t16
4
t20
32
LGK16...
For flame supervision with flame detector QRA53... / QRA55... or ionization probe
Preferred use:
Flash-steam
generators
LGK16.122A27* LGK16.133A27
t1
10
TSA
2
TSA´
---
t3
4
t3´
---
t3n
---
t4
6
t4´
---
t5
4
t6
10
t7
2
t8
30
t9
2
t10
6
t11
Optional
t12
Optional
t16
4
t20
32
6/20
Siemens Building Technologies
HVAC Products
Universal
Medium- or heavy-
application
oil burners
LOK16.250A27*
LOK16.650A27*
22.5
5
---
2.5
15
7.5
---
7.5
15
2.5
47.5
---
10
5
35
Flash-steam
D (also suited
generators
for direct-fired
air heaters),
F
LGK16.322A27* LGK16.333A27* LGK16.335A27* LGK16.622A27* LGK16.635A27*
9
36
3
2
---
---
3
4
---
---
---
---
6
10
---
---
3
10
14.5
12
3
2
29
66
3
2
6
8
3
4
60
---
67.5
Prepurge time with air damper fully open
5
Safety time or first safety time with burners using a pilot burner
---
Safety time or first safety time with burners using a pilot burner
2.5
Preignition time
Long preignition time
15
Postignition time (ignition transformer connected to terminal 15)
7.5
Interval between start of «TSA» or «TSA´» and release of valve
at terminal 19
---
Interval between start of «TSA» or «TSA´» and release of valve
at terminal 19
7.5
Interval between end of «t4» or «t4´» and release of load control-
ler or valve at terminal 20
15
Postpurge time (identical to permissible afterburn time «t13»)
2.5
Switch-on delay of fan motor «M2»
92.5
Duration of startup without «t11» and «t12»
---
Second safety time with burners using a pilot burner
10
Interval from startup to the beginning of the air pressure check
Air damper running time to the fully open position
Air damper running time to the low-fire position
Permissible afterburn time
5
Interval from startup to the open command for the air damper
12.5
Interval to self-shutdown of the sequence switch
D, A
31.5
3
---
6
---
---
12
---
12
18
3
72
3
12
6
27
Times
GB
F, I
37.5
66
2.5
2
5
---
5
4
2.5
---
---
---
12.5
10
15
---
12.5
10
15
12
2.5
2
75
96
5
2
10
8
5
4
22.5
---
B, NL
67.5
2.5
5
5
2.5
---
12.5
15
12.5
15
2.5
105
5
10
5
---
CC1N7785en
15.10.2003
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