LMV50.320B2 Siemens Burner Control

Overview

The Siemens LMV50.320B2 is a high-tech, microprocessor-based burner management system designed for the control and supervision of single or dual-fuel forced draft burners of medium to high capacity. This advanced digital controller provides integrated fuel-air ratio control and load control, ensuring precise combustion efficiency and maximum energy savings. Specifically engineered for industrial applications, the LMV50 series includes specialized functions such as high-temperature supervision. It is built for continuous operation and features a modular design that allows for seamless integration with other Siemens components via a safety-related CAN bus system.

Features

• Electronic fuel-air ratio control for a maximum of 4 actuators
• Integrated boiler and load controller for precise temperature or pressure regulation
• Designed for continuous operation with ionization probe, QRI infrared, or QRA7 UV flame detectors
• Variable Speed Drive (VSD) control capability for optimized fan motor operation
• Built-in gas valve proving system to ensure safety and prevent leaks
• User-friendly interface via the AZL5 display unit with LCD clear text and menu-driven diagnostics
• Robust safety profile with SIL 3 certification and permanent monitoring of safety-related digital outputs
• Password-protected parameter levels to prevent unauthorized access and ensure system integrity
• Designed for a service life of approximately 10 years or 250,000 start cycles

Specifications

• Model: LMV50.320B2
• Operating Voltage: AC 230 V (+10% / -15%)
• Mains Frequency: 50/60 Hz
• Power Consumption: < 30 W
• Protection Class: IP40 (when installed in an enclosure)
• Operating Temperature: -20 C to +60 C
• Safety Rating: SIL 3 according to IEC 61508
• Actuators: Maximum of 4 (SQM45 or SQM48 series)
• Weight: Approximately 3.0 kg (6.6 lbs)
• Dimensions: 230mm x 135mm x 60mm

Applications

• Industrial burner systems for gas, oil, or dual-fuel operation
• High-capacity forced draft burners used in medium to large boilers
• Process heat applications and thermal processing plants
• Commercial heating and hot water systems
• High-temperature industrial furnace operations requiring specific supervision functions
• Linkageless control upgrades for legacy combustion equipment to improve efficiency and emissions