Siemens LMO44.255C2 User Manual

CC1N7130en
22.08.2013
Building Technologies Division
Infrastructure & Cities Sector
7
130
Oil Burner Controls
LMO14...
LMO24...
LMO44...
Microcontroller-based oil burner controls for the startup, supervision and control
of forced draft oil burners in intermittent operation. Standard versions with an oil
throughput up to 30 kg / h, special versions above 30 kg / h.
The LMO14..., LMO24..., LMO44... and this Data Sheet are intended for use by
OEMs which integrate the burner controls in their products.
Use, features
The LMO... are designed for the startup and supervision of 1- or 2-stage forced draft oil
burners in intermittent operation. Yellow-burning flames are supervised with photo
resistive detectors QRB..., blue-burning flames with blue-flame detectors QRC...
In terms of housing dimensions, electrical connections and flame detectors, the LMO...
are identical with the LOA... oil burner controls.
- Oil burners with fans to EN 267
- Burner controls for use with atomization oil burners of monoblock design to
DIN EN 230:2005-10
- LMO44... for use with stationary direct-fired air heaters
- Undervoltage detection
- Electrical remote reset
- Bridging contact for oil preheater
- Monitoring of time for oil preheater
- Accurate and reproducible control sequence thanks to digital signal handling
- Controlled intermittent operation after 24 hours of continuous operation
- Limitation of the number of repetitions
- Multicolor indication of fault status and operational status messages
Use
General features
Distribuitor: FLAME POWER SRL 021-3121727 ; 0744-340566 contact@arzatoare.ro ; www.arzatoare.ro

Siemens LMO44.255C2 Specifications

General

Brand	Siemens
Model	LMO44.255C2
Category	Control Unit
Language	English

Summary

Use and Features

Use

Describes the intended application of the burner controls for startup and supervision.

General Features

Lists key characteristics and functionalities of the burner controls for oil burners.

Safety and Installation Notes

General Warning Notes

General precautions to avoid injury, property damage, or environmental harm during operation.

Mounting and Installation Guidelines

Guidelines for mounting, electrical installation, and compliance with regulations.

Flame Detector Connection

Best practices for connecting flame detectors for reliable signal transmission.

Commissioning, Standards, and Service

Commissioning Safety Checks

Procedures for verifying safe operation during commissioning and maintenance.

Standards and Certificates

Details of conformity to EEC directives and ISO standards.

Life Cycle Information

Discusses the designed lifetime and replacement criteria for burner controls.

Disposal Guidelines

Instructions for proper disposal of the unit and its electronic components.

Technical Specifications

Mechanical Design

Describes the housing material, construction, and internal components.

Type Summary

Overview of different burner control types and their technical parameters.

Ordering Information

Ordering Oil Burner Controls

Information on ordering burner controls and related accessories.

Flame Detectors and Interfaces

Details on ordering flame detectors, interfaces, and PC software.

Test Adapters and Accessories

Information on test adapters, demo cases, and lockout reset button extensions.

Detailed Technical Data

General Unit Data

Provides electrical and physical specifications for the burner controls.

Environmental Conditions

Specifies storage, transport, and operation conditions including temperature and humidity.

Flame Supervision and Diagnostics

Flame Supervision with QRB or QRC

Details detector current requirements and permissible limits for flame supervision.

Operational Status Indication

Explains the meaning of green LED indications for operational status.

Detector Current Measurement

Illustrates the measuring circuit for detector current using a microammeter.

Functionality and Fault Handling

Preconditions for Startup

Lists the conditions that must be met before the burner control can start.

Undervoltage and Time Supervision

Describes behavior during undervoltage and supervision of oil preheater.

Control Sequence in Event of Fault

Details the response to faults like mains failure or loss of flame.

Repetition Limitation

Explains the maximum number of repetitions allowed before lockout.

Operation and Diagnostics

Operation and Controls

Explains the lockout reset button and the multicolor signal lamp (LED).

Diagnostic Options

Outlines visual and interface diagnostics for operational status and faults.

Operational Status Indication

Details the color code table for the multicolor signal lamp during operation.

Fault Cause Diagnostics

Activating Fault Diagnostics

Describes how to activate visual diagnostics using the lockout reset button.

Error Code Table

Lists red blink codes for the signal lamp and their corresponding possible causes.

Connection Diagrams and Control Sequences

Connection Diagrams

Illustrates internal and external connection diagrams for LMO14, LMO24, and LMO44.

Control Sequences

Details the operational control sequences for different LMO models.

Legend and Symbols

Legend for Terminals and Signals

Defines abbreviations and symbols used in the diagrams and text.

Legend for Control Sequences

Explains the meaning of codes and symbols used in control sequence diagrams.

Dimensions and Accessories

Unit Dimensions

Provides dimensional drawings for the LMO burner controls.

Lockout Reset Button Extension

Details the lengths available for the lockout reset button extension.