Siemens LFL1.622 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 LFL1.622 Specifications

General

Brand	Siemens
Model	LFL1.622
Category	Controller
Language	English

Summary

Siemens Burner Controls Overview

Burner Control Application Use

Safety and Installation Guidelines

Critical Safety Warnings

Crucial warnings to prevent injury, damage, or environmental harm during operation.

Application and Commissioning Notes

Flame Detector Electrical Connections

Explains how to properly connect flame detectors for reliable signal transmission.

Engineering and Wiring Guidelines

Compliance and Certifications

Product Type Summary

Technical Data Overview

General Unit Specifications

Provides general specifications for the LFL1... unit, including voltage, frequency, and power.

Environmental Conditions

Flame Supervision and Detector Current Measurement

Ionization Probe Flame Supervision

Details technical data for flame supervision using an ionization probe.

QRA Detector Flame Supervision

Details technical data for flame supervision using QRA2/QRA4/QRA10 detectors.

Detector Current Measurement Circuits

Burner Control Functions

Detailed Burner Control Functions

General Safety Features

Highlights additional safety features enabling higher levels of safety for the LFL1... unit.

Burner Control Operations

Flame Supervision Mechanisms

Preconditions for Burner Startup

Burner Startup Sequence

Startup Sequence for Interrupted Pilot Burners

Fault Conditions and Lockout Indication

Lockout Indicator Interpretation

Explains the symbols and meanings of the lockout indicator for fault conditions.

Connection Diagrams Overview

Detailed Connection Diagram

Switchgear Sequence Chart

Connection Examples and Program Sequences

Direct Spark Flame Burner Connection Examples

Document Legend and Symbols