Siemens LME22.232A2 User Manual

CC1N7101en
27.11.2008
Building Technologies
HVAC Products
7
101
Burner Controls LME...
Burner controls for the supervision of 1- or 2-stage gas or gas / oil burners of
small to medium capacity, operation, with or without fan in intermittent.
The LME… and this Data Sheet are intended for use by OEMs which integrate the
burner controls in their products.
Use, features
LME… burner controls are used for the startup and supervision of 1- or 2-stage gas or
gas / oil burners in intermittent operation. The flame is supervised by an ionization
probe or flame detector QRA… with ancillary unit AGQ3…A27 for gas / oil forced draft
burners or blue–burning flames with blue-flame detectors QRC...
In terms of housing dimensions, the LME... are identical with the LGB… and LMG…
burner controls (refer to «Type summary»).
- For gas burners with or without fan to EN 298: 2003
- For gas burners with fans conforming to EN 676
- For oil burners to EN 230: 2005
- Undervoltage detection
- Air pressure supervision with functional check of the air pressure switch during
startup and operation
- Electrical remote reset facility
- Multicolor indication of fault status and operational status messages
- Limitation of the number of repetitions
- Accurate control sequence thanks to digital signal handling
- Controlled intermittent operation after 24 hours of continuous operation
Supplementary documentation
Product Range Overview LME…............................................................................ Q7101
Use
Features

Siemens LME22.232A2 Specifications

General

Type	LME22.232A2
Brand	Siemens
Category	Controller
Mains Frequency	50/60 Hz
Input Voltage	24 V DC
Protection Class	IP40
Application	Oil/Gas Burners
Output Current	2A
Operating Temperature	-20 to +60 °C

Summary

Use, features

Features

Lists key features of LME burner controls including undervoltage detection, air pressure supervision, and remote reset.

Warning notes

Installation notes

Electrical connection of flame detectors

Commissioning notes

Safety check to be carried out

Details safety checks required during burner startup, simulated flame loss, and simulated air pressure failure.

Indication and diagnostics

Type summary

Technical data

General unit data

Provides general technical specifications for the LME burner controls including voltage, frequency, power, and weight.

Environmental conditions

Details storage, transport, and operation conditions regarding climatic and mechanical specifications.

Flame supervision with ionization probe

Flame supervision with UV detector

Flame supervision with QRC detector

Functions

Preconditions for burner startup

Undervoltage

Fault Handling and Reset

Control sequence in the event of fault

Details the response of the burner control to various fault causes like mains failure, undervoltage, or loss of flame.

Resetting the burner control

Explains the procedure to reset the burner control after a lockout condition, including button press and conditions.

Limitation of repetitions

Operation, indication, diagnostics

Operation

Operational status indication

Diagnostics of the cause of fault

Connection diagram and control sequence LME11...

Connection diagram and control sequence LME21...

Application examples for SQN Actuators

2-Stage Modulating Burners

Connection diagram and control sequence LME22... / LME23...

Application examples for LME22 Actuators

2-Stage Modulating Burners with SQN Actuators

Connection diagram and control sequence LME41...

Connection diagram and control sequence LME44...