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Siemens LMG2 Series User Manual

Siemens LMG2 Series
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Landis & Staefa Division CC1N7421E December 04, 1998 1/16
7
421
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
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Siemens LMG2 Series Specifications

General IconGeneral
BrandSiemens
ModelLMG2 Series
CategoryController
LanguageEnglish

Summary

Burner Controls LMG2...

Warning Notes

Installation Notes

Type Summary

Ordering Information

Burner Controls & Flame Detectors

Specifies types of burner controls and flame detection options.

Mounting & Connection Accessories

Lists plug-in bases, cable holders, pedestals, and gland holders.

Technical Data

General Specifications

Covers operating voltage, mains frequency, power consumption, and protection degree.

Environmental & Operational Conditions

Details transport, climatic, and operational conditions, including temperature and humidity.

Flame Supervision with Detector Electrode

Flame Supervision with UV Detector

Functions and Control Logic

Startup Prerequisites

Lists essential conditions required before the burner control can start.

Fault Handling

Details lockout conditions, restarts, and fault program sequences.

Connection Diagrams

Connection Diagrams for LMG22

Operating Concept

Diagnosis of Cause of Fault

Details how to interpret LED blink codes to identify fault causes.

Error Code Table

Lists specific blink codes and their corresponding fault causes.

Flame Establishment Time

Internal Diagrams

Dimensions

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