Siemens LME22.233A2 User Manual

CC1N7101en
27.11.2008
Building Technologies
HVAC Products
7
101
Burner Controls LME...
Burner controls for the supervision of 1- or 2-stage gas or gas / oil burners of
small to medium capacity, operation, with or without fan in intermittent.
The LME… and this Data Sheet are intended for use by OEMs which integrate the
burner controls in their products.
Use, features
LME… burner controls are used for the startup and supervision of 1- or 2-stage gas or
gas / oil burners in intermittent operation. The flame is supervised by an ionization
probe or flame detector QRA… with ancillary unit AGQ3…A27 for gas / oil forced draft
burners or blue–burning flames with blue-flame detectors QRC...
In terms of housing dimensions, the LME... are identical with the LGB… and LMG…
burner controls (refer to «Type summary»).
- For gas burners with or without fan to EN 298: 2003
- For gas burners with fans conforming to EN 676
- For oil burners to EN 230: 2005
- Undervoltage detection
- Air pressure supervision with functional check of the air pressure switch during
startup and operation
- Electrical remote reset facility
- Multicolor indication of fault status and operational status messages
- Limitation of the number of repetitions
- Accurate control sequence thanks to digital signal handling
- Controlled intermittent operation after 24 hours of continuous operation
Supplementary documentation
Product Range Overview LME…............................................................................ Q7101
Use
Features

Siemens LME22.233A2 Specifications

General

Brand	Siemens
Type	LME22.233A2
Category	Controller
Application	Industrial Automation
Supply voltage	24 V DC
Frequency	50/60 Hz
Protection Class	IP20
Weight	0.5 kg
Shock Resistance	15 g

Summary

Burner Controls Overview

Safety and General Notes

Warning Notes

Emphasizes critical safety precautions for handling and operating the burner controls.

Installation and Wiring

Installation Guidelines

Provides guidelines for cable routing, conductor identification, and compliance with regulations.

Commissioning Procedures

Safety Checks

Outlines essential safety checks for burner startup, loss of flame, and air pressure failure.

Technical Data

General Unit & Environmental Data

Details unit specifications, environmental conditions, storage, transport, and operation parameters.

Flame Supervision

Ionization Probe Details

Provides detector voltage, switching thresholds, and short-circuit currents for ionization probes.

Ancillary Unit AGQ3...A27

UV Detector Supervision

Flame Supervision & Functions

QRC Detector & LED Status

Specifies detector current requirements for QRC blue flame detectors and LED status indication.

Startup, Undervoltage, Intermittent Op.

Fault Handling and Reset

Fault Causes and Responses

Details causes of faults like mains failure, undervoltage, and loss of flame, with corresponding responses.

Reset and Repetition Limits

Explains burner control reset procedures and repetition limitations for specific models.

Operation and Diagnostics

Control Operation and LED Indicators

Explains the lockout reset button and the multicolor signal lamp for visual diagnostics.

Diagnostics of Fault Causes

Error Code Table and Diagnosis

Provides a table linking LED blink codes to fault causes and outlines the diagnosis activation process.

Application Examples

Actuator Control (SQN)

LME22 Actuator Control