Siemens LGA52.150B27 User Manual

CC1N7418en
21.06.2016
Building Technologies Division
7
418
Gas Burner Controls
LGA...
The gas burner controls are used for supervision, startup and control of
atmospheric gas burners of small to medium capacity without a fan in
intermittent operation.
The LGA... and this Data Sheet are intended for use by OEMs which integrate the
gas burner controls in their products.
Use, features
The LGA are designed for startup and supervision of atmospheric gas burners in
intermittent operation. The flame is supervised with an ionization probe.
 Burner controls for gas burners and gas units with or without fan
to EN 298: 1994-02 or EN 298: 1993
 Undervoltage detection
 Air pressure supervision with functional check of the air pressure switch during
startup and operation
LGA41.173A27 and LGA52.171B27 are suitable for use with air heaters.

Note!
Do not use for new designs.

Note!
The following burner controls can be used for new designs:
 LME1...
 LME2...
 LME3...
 LME4...
General features
Special features

Siemens LGA52.150B27 Specifications

General

Brand	Siemens
Model	LGA52.150B27
Category	Controller
Language	English

Summary

Gas Burner Controls

Warning notes

Mounting notes

General notes on ensuring compliance with national safety regulations during mounting.

Positioning the ionization probe

Installation notes

Electrical connection of ionization probe

Commissioning notes

Technical data

Flame supervision

Flame supervision with ionization probe

Explains flame supervision using ionization probe voltage and current.

Function

Startup

Describes the conditions required for the burner control to initiate startup.

Undervoltage detection

Explains prevention of startup or lockout due to mains voltage drops.

Reversed polarity protection

Details the lockout initiated if live and neutral conductors are mixed up.

Control sequence

Control sequence in the event of fault

Resetting the burner control

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

Internal diagram LGA41...

Internal diagram LGA52... / LGA63...

Connection diagram