Siemens LMG22.130A27 - User Manual

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

Siemens LMG22.130A27 Specifications

General

Order Number	LMG22.130A27
Output Type	Relay
Communication Protocol	Modbus RTU
Communication Interface	RS-485
Protection Class	IP20
Mounting Type	DIN Rail
Mounting Position	Any
Flame Detector	Not Applicable
Series	LMG
Supply Voltage	24 V DC
Mains Frequency	50/60 Hz
Fuse Rating	2 A

Summary

Burner Controls

Use

Overview of burner control applications, certifications, and intended use by OEMs.

Application-specific features

Key features include undervoltage detection, air pressure supervision, and remote reset.

Available versions

Details on different models like LMG21.../LMG22... and LMG25... with their specific capacities.

Warning notes

Installation notes

Engineering and Mounting Notes

Electrical connection of ionization current and UV detectors

Plug-in base

Description of the plug-in base design, terminals, and cable entry options.

Type summary

Technical data

Flame supervision with detector electrode

Flame supervision with AGQ2...A27 and UV detector QRA...

Ancillary unit AGQ2...A27

Details on the UV ancillary unit AGQ2...A27 and its use with LMG2... burner controls.

Functions

Startup and Operation

Covers prerequisites, undervoltage, intermittent operation, and polarity protection.

Fault Handling and Reset

Details fault program sequence, lockout conditions, and reset procedures.

Connection diagram LMG21...; LMG25...

Application examples

Examples for controlling actuators in two-stage or modulating burners.

Connection diagram LMG22...

Application examples

Examples for controlling actuators in two-stage or modulating burners.

Other application examples

Operating concept

Diagnosis of cause of fault

Procedure to diagnose faults using LED blink codes on the burner control.

Error code table

Table listing blink codes and their corresponding fault causes.

Interrogation of flame establishment time

Diagnostics table

Table correlating blink codes with flame establishment times.

Internal diagram

Dimensions

Plug-in base

Dimensional drawings and specifications for the plug-in base.

Ancillary unit AGQ2...A27

Dimensional drawings for the AGQ2...A27 ancillary unit.