Siemens LFL1.635 - 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.

Summary

Supplementary Documentation

Safety Warning Notes

Critical safety warnings to prevent injury and damage during operation and handling.

Application, Electrical, and Commissioning

Flame Detector Electrical Connection

Commissioning Safety Checks

Essential safety checks and procedures for proper commissioning of the burner control system.

Type Summary and Switching Time Data

Accessories

Flame Detectors and Connection Accessories

Technical Data

General Unit Specifications

Key electrical, physical, and general operational specifications for the LFL1... burner controls.

Flame Supervision Technical Data

Burner Functionality and Operation

Burner Type Operation Modes

Sequence Control Diagrams

Startup and Control Logic

Preconditions for Safe Startup

Lists the necessary input signals and conditions required for a safe burner startup sequence.

Control Functions and Features

Startup Sequence Details

Faults and Lockout Management

Electrical Connection Diagrams

Connection Examples and Program Sequences

Reference Information

Legend of Symbols and Terms

Time Table Reference

Siemens LFL1.635 Specifications

General

Brand	Siemens
Model	LFL1.635
Category	Controller
Language	English