Siemens LAL2.25 User Manual

CC1N7153en
21.09.2016
Building Technologies Division
7
153
Oil Burner Controls
LAL...
Oil burner controls
 For oil atomizing burners of medium to large capacity
 For multistage or modulating burners in intermittent operation
 With or without air pressure supervision for checked air damper control
 Flame supervision
– with photoresistive detector QRB
– or blue-flame detector QRC1
– or silicon photocell detector RAR9
 Suitable for use with air heaters (WLE)
The LAL and this Data Sheet are intended for OEMs which integrate the oil
burner controls in their products!
Use
 For the control and supervision of oil atomization burners
 For burners of medium to high capacity
 For intermittent operation (at least one controlled shutdown every 24 hours)
 Can be universally used with multistage or modulating burners
 Suited for use with stationary air heaters (WLE)
The flame supervision is ensured via a Photoresistive detectors QRB，blue-flame
detectors QRC1 or Silicon photocell detectors RAR9.
LAL1 - Yellow- and blue-flame burners without air pressure supervision
LAL2 - Yellow-flame burners with air pressure supervision
LAL3.25 - For special applications, e.g. burners of incinerator plant
(for details, refer to «Type summary» and «Notes»)

Siemens LAL2.25 Specifications

General

Brand	Siemens
Model	LAL2.25
Category	Control Unit
Language	English

Summary

Oil Burner Controls

Supplementary Documentation

Safety and Warning Notes

Crucial safety instructions and warnings for handling the unit.

Electrical Connection of Flame Detector

Commissioning and Engineering Notes

Commissioning Safety Checks

Essential safety checks to perform during the commissioning phase.

Engineering Wiring Guidelines

Type Summary and Timing

Type Summary Overview

Timing Parameters Legend

Technical Data

General Unit Specifications

Key technical data for the LAL unit, including voltage and current ratings.

Flame Supervision and Measurement

Flame Supervision Parameters

Technical details regarding flame supervision detector currents and cable lengths.

Operational Functionality

Burner Type Functionality

General Operational Features

Burner Control Operations

Burner Control Logic

Details on burner operation, motor control, and output signals.

Burner Startup Prerequisites

Startup Sequence

Initial Startup Phases

Covers start command, prepurge, preignition, and ignition safety.

Postignition and Sequence Progression

Details postignition and how the sequence progresses.

Fault Conditions and Lockout Indication

Wiring Connection Diagrams

Control Sequence Diagram

Legend and Timings

General Legend

Time Parameters Table