Table of Contents
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CC1N7451en
20.11.2017
Burner Controls
Burner controls
For gas, oil or dual-fuel forced draft burners of medium to high capacity
For multistage or modulating burners in intermittent operation
With checked air damper control
– with UV detectors QRA2 / QRA4 / QRA10
– and ionization probe
The LFL1... and this Data Sheet are intended for use by OEMs which integrate the
burner controls in their products!
Control and supervision of forced draft burners of direct spark flame or interrupted
pilot construction
For medium to high capacity
For intermittent operation (at least one controlled shutdown every 24 hours)
For universal use with multistage or modulating burners
For use with stationary air heaters (WLE)
For use with dual-fuel burners
Type-tested and approved in accordance with DIN EN 298
The flame supervision is ensured via a flame detector QRA2 / QRA4 / QRA10 or
ionization probe. The difference between 01 series and 02 series is the duration of the
safety time for the pilot burner of burners equipped with pilot gas valves.
For atmospheric burners of high capacity, use the LFL1.638.
Building Technologies Division
7
451
LFL1...
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Table of Contents
Related Manuals for Siemens LFL1.122
Summarization of Contents
Supplementary documentation
Warning notes
General safety warnings and precautions to avoid injury and damage.
Mounting notes
Instructions and precautions for mounting the unit.
Installation notes
Guidelines for the correct installation of the burner control unit.
Mechanical design
Housing
Details on the impact-proof and heat-resistant plastic housing.
Accessories (to be ordered separately)
Flame detectors
Types of UV and ionization flame detectors available.
Connection accessories for medium-capacity burner controls
Plug-in bases for cable entry glands.
Others
Additional accessories like reversed polarity protection.
Function
2-stage direct spark flame burner
Describes the function sequence for 2-stage direct spark flame burners.
Modulating direct spark flame burner
Describes the function sequence for modulating direct spark flame burners.
2-stage interrupted pilot burner
Describes the function sequence for 2-stage interrupted pilot burners.
Control sequence under fault conditions and lockout indication
No start
Indicates faults preventing the burner from starting.
Startup interruption
Faults that interrupt the startup sequence.
Lockout (disturbance in the flame supervision circuit)
Lockout due to issues with flame supervision.
Lockout (no flame)
Lockout due to absence of a flame signal.
Lockout (no air pressure)
Lockout due to lack of air pressure.
Lockout indicator
Explanation of the lockout indicator symbols and their meaning.
Connection examples and program sequence
Doubling the safety time with direct spark flame burners
Circuit for extending safety time on direct spark burners.
Burner without air damper
Connection example for burners lacking an air damper.
Reversed polarity protection AGM30
Use of AGM30 for reversed polarity protection.
2-stage direct spark flame burner
Connection example and program sequence for 2-stage burners.
Legend
Control signals of the burner control
Explanation of permissible and required input signals.
Time table
Definitions of various time parameters used in sequences.
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