Siemens LMG22.233A27 User Manual

Landis & Staefa Division CC1N7421E December 04, 1998 1/16
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Burner Controls LMG2...
Burner controls for the supervision of single- or two-stage forced draught gas or
gas / oil burners of small to medium capacity (typically up to 350 kW) in
intermittent operation.
The burner controls are certified to EN 230 and EN 298.
They carry the CE mark based on the directives for gas appliances and
electromagnetic compatibility.
The LMG2... and this data sheet are intended for use by OEMs which integrate the
burner controls in their products.
Burner controls of the LMG2... range are used for startup and supervision of single- or
two-stage gas or gas / oil burners in intermittent operation.
The flame is supervised with a detector electrode or UV flame detector QRA... (with
ancillary unit AGQ2...A27).
LMG21... / LMG22... in the same housing replace burner controls LGB21... / LGB22...
(refer to «Type summary») and, with the help of the respective adapters, burner controls
LFI7... and LFM1... (refer to «Ordering»).
Application-specific features
–
Detection of undervoltages
–
Air pressure supervision with function check of air pressure monitor during startup
and operation
–
Electric remote reset
–
Indication of error code and flame signal by means of LEDs in the lockout reset button
–
Precise program times thanks to digital processing of signals
Available versions
•
LMG21... / LMG22... For unlimited burner capacities (output on startup ≤ 120 kW)
Locking in the event of loss of flame during operation
•
LMG25... For burner capacities ≤ 120 kW
Three repetitions in the event of loss of flame during
operation
ISO 9001
Use

Siemens LMG22.233A27 Specifications

General

Product Type	Burner Management System
Series	LMG22
Order Number	LMG22.233A27
Power Supply	AC
Frequency	50/60 Hz
Output Type	Relay
Protection Class	IP40
Mounting	DIN rail
Type	Burner Controller
Supply Voltage	AC 230 V
Operating Voltage	AC 230 V
Flame Detector	Ionization probe, UV detector
Safety Time	3 seconds
Application	Gas/oil burners
Operating Temperature	-20 to +60 °C

Summary

Safety and Installation Guidelines

Warning Notes

Crucial safety warnings to avoid personal injury, damage, or environmental harm.

Engineering Notes

Installation Notes

Type Summary and Specifications

Burner Control Type References

Table detailing various LMG2 model references and their technical parameters for different flame detectors.

Ordering and Accessories

Ordering Components

Lists available burner controls, flame detectors, plug-in bases, and accessories for ordering.

Technical Data

General Specifications

Covers operating voltage, frequency, power consumption, weight, and degree of protection.

Environmental and Operating Conditions

Flame Supervision with Detector Electrode

Detector Electrode Monitoring Parameters

Explains voltage and current thresholds for flame detection via ionization electrodes.

Flame Supervision with UV Detector

Ancillary Unit AGQ2...A27

Functions and Control Logic

Startup Prerequisites

Lists essential conditions like burner control reset, closed contacts, and fan motor connection.

Operational States and Fault Handling

Covers undervoltage, intermittent operation, polarity protection, and fault program logic.

Resetting the Burner Control

Instructions on how to reset the burner control after a lockout condition using the reset button.

Operating Concept and Fault Diagnosis

Burner Control States and LEDs

Describes states like lockout and operation, indicated by red and green LEDs.

Fault Diagnosis Procedure

Details how to read blink codes from LEDs for diagnosing fault causes.

Error Code Table

Lists specific blink codes and their corresponding fault causes for troubleshooting.

Flame Establishment Time Interrogation

Flame Establishment Time Measurement

Explains how to measure flame establishment time using blink codes after a lockout.

Diagnostics Table for Flame Time