Siemens LFL1.333 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 LFL1.333 Specifications

General

Brand	Siemens
Model	LFL1.333
Category	Controller
Language	English

Summary

Burner Controls Overview

LFL1... Burner Control Features

Key features of LFL1... burner controls for gas, oil, or dual-fuel forced draft burners.

Safety Warnings and Precautions

Application and Commissioning Notes

Flame Detector Electrical Connection

Proper wiring of flame detectors like UV and ionization probes to the burner control unit.

Commissioning Safety Checks

Essential safety checks to perform during plant commissioning or maintenance of burner controls.

Technical Data - General Unit

LFL1... General Specifications

Electrical, environmental, and mounting specifications for the LFL1... burner controls.

Burner Control Features and Safety

General Safety and Operational Features

Additional safety features of LFL1... controls, including tests and checks.

Flame Supervision and Startup Preconditions

How flame supervision works and preconditions for burner startup.

Preconditions for Burner Startup

Required Startup Conditions for LFL1...

Specific conditions that must be met for a burner to start successfully with LFL1....

Startup Sequence Details

Start Command and Pre-Purge Phase

The initial steps of the startup sequence, including start command and prepurge.

Direct Spark Flame Burner Startup Sequence

Specific startup sequence for direct spark flame burners.

Interrupted Pilot Burner Startup Sequence

Interrupted Pilot Burner Operation

The startup sequence for interrupted pilot burners, including operation and shutdown.

Fault Conditions and Lockout Indication

Lockout Cause Indicators and Symbols

Symbols and meanings indicating the cause of a lockout in burner control operation.

Lockout Reset and Burner Restart Procedure

Procedure for resetting the burner control after a lockout and initiating a restart.

Connection Diagrams Overview

General Burner Control Connection Diagram

Legend and Symbol Definitions

Component and Terminal Symbol Legend

Lockout Indicators and Time Parameters

Lockout Position Indicators Explained

Time Table Definitions for Sequences