Siemens LFL1.133 User Manual

CC1N7451en
20.11.2017
Building Technologies Division
7
451
Burner Controls LFL1...
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
 Flame supervision
– 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!
Use
 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.

Siemens LFL1.133 Specifications

General

Type	LFL1.133
Flame safeguard control	Yes
Safety time during start-up	3 s
Under voltage detection	Yes
Mounting	DIN rail
Protection class	IP40
Output Type	Relay
Frequency	50/60 Hz
Voltage	220-240 V

Summary

Supplementary Documentation

Warning Notes

Safety precautions and general warnings for handling the unit.

Standards and Certificates

Technical Data

General Unit Data

General electrical and physical specifications of the LFL1... unit.

Environmental Conditions

Technical Data (cont'd)

Flame Supervision with Ionization Probe

Technical details for ionization probe flame supervision.

Flame Supervision with Flame Detector

Technical details for UV detector flame supervision.

Detector Current Measurement

Function

2-Stage Direct Spark Flame Burner

Description of function for 2-stage direct spark flame burners.

Modulating Direct Spark Flame Burner

Description of function for modulating direct spark flame burners.

2-Stage Interrupted Pilot Burner

Description of function for 2-stage interrupted pilot burners.

Function (cont'd)

General

Control of the Burner

How the unit controls burner operation, including fan and valves.

Flame Supervision

Details on how flame supervision works with different detectors.

Preconditions for Startup

Startup Sequence

Direct Spark Flame Burners

Startup Sequence (cont'd)

Interrupted Pilot Burners

Control Sequence Under Fault Conditions and Lockout Indication

Switchgear Sequence

Legend

Legend (cont'd)

Time Table