Siemens LFL1.122 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 LFL1.122 Specifications

General

Brand	Siemens
Model	LFL1.122
Category	Controller
Language	English

Summary

Burner Controls Overview

Safety and Installation

Warning Notes and Installation Precautions

Essential safety instructions, warnings, and precautions for installation and handling.

Standards and Certifications

Compliance and Approvals

Technical Specifications

General Unit and Environmental Data

Flame Supervision Technical Data

Ionization Probe and UV Detector Data

Technical details for flame supervision using ionization probes and UV detectors.

Burner Functionality Modes

Burner Type Operation Modes

Detailed Functional Aspects

General Safety and Control Functions

Explains safety features, control outputs for actuators/fans, and flame supervision methods.

Preconditions for Burner Startup

Startup Readiness Requirements

Lists necessary conditions for initiating a burner startup sequence, including reset and damper status.

Startup Sequence Procedures

Direct Spark Flame Burner Startup Sequence

Details the steps and timings for the startup sequence of direct spark flame burners.

Interrupted Pilot Burner Startup

Startup Sequence for Pilot Burners

Outlines the startup sequence for interrupted pilot burners, including safety times.

Fault Handling and Lockout

Lockout Causes and Indications

Explains fault symbols, lockout causes, and the lockout indicator's functions.

Connection Diagram Overview

Wiring Diagram Principles

Detailed Connection Diagrams

Specific Wiring Examples

Switchgear Sequence and Timing

Switchgear Operation Chart

Connection Examples for Burner Types

Connection Examples for Modulating and Pilot

Documentation Legend

Symbols, Abbreviations, and Signals

Lockout Indications and Time Parameters

Lockout Indicators and Time Table