LMV37.400A2 Siemens Burner Control

Overview

The Siemens LMV37.400A2 is a high-performance, microprocessor-based burner management system designed for the control and supervision of medium to high-capacity forced draft burners. This unit integrates critical functions into a single base module, including burner safeguard, electronic fuel-air ratio control for up to two actuators, and a gas valve proving system. Engineered for single-fuel applications using oil or gas, it is primarily intended for intermittent operation, though continuous operation is supported when paired with an ionization probe. The LMV37.400A2 operates on 230V AC and provides a modular, flexible solution for industrial and commercial combustion plants seeking to optimize fuel efficiency and safety.

Features

• Integrated fuel-air ratio control for precise modulation of up to two SQM3 or SQN1 motorized actuators
• Comprehensive gas valve proving system to ensure safety before and after burner operation
• Variable Speed Drive (VSD) control for air fan motor optimization and energy savings
• Modbus communication interface for seamless integration into building automation and control systems (BACS)
• Flexible parameterization via the AZL2 display unit or ACS410 PC software for tailored burner configuration
• Robust safety architecture with a contact feedback network (CFN) monitoring all digital inputs and outputs
• Support for multiple flame detection methods, including ionization probes and QRA, QRB, or QRC optical detectors
• Compact design with high-resolution positioning via stepper motor-driven actuators

Specifications

• Model: LMV37.400A2
• Operating Voltage: AC 230 V (-15% / +10%)
• Mains Frequency: 50 / 60 Hz
• Power Consumption: Less than 30 W
• Temperature Range: -20 C to +60 C (-4 F to +140 F)
• Protection Rating: IP00 (must be installed in a protected environment)
• Weight: Approximately 0.7 kg (1.5 lbs)
• Design Lifetime: 250,000 start cycles (approx. 10 years of typical operation)
• Dimensions: 230mm x 135mm x 60mm
• Mounting: Integrated into a burner-mounted control cabinet or housing

Applications

• Supervision of forced draft burners in commercial and industrial heating plants
• Control of single-fuel gas or oil burners requiring electronic ratio control
• Integration into high-demand HVAC and boiler systems for industrial thermal processes
• Replacement or upgrade of legacy burner controllers in medium to large capacity plants
• Use in automated gas trains requiring integrated valve proving and air-fuel management