LMV37.420A1 Siemens Burner Control

Overview

The Siemens LMV37.420A1 is a microprocessor-based burner management system designed for the control and supervision of single-fuel forced draft burners. Specifically engineered for the North American market, this 110V base unit provides an integrated solution for medium to high-capacity burners. It combines flame safeguard functions with electronic air-fuel ratio control for up to two actuators, ensuring optimal combustion efficiency and safety. Its compact, robust design makes it a standard component for OEMs in commercial and industrial boiler and HVAC applications.

Features

• Integrated fuel-air ratio control for up to two SQM3 or SQN1 stepper motor actuators
• Built-in gas valve proving system to ensure safety before burner startup
• High-resolution positioning via stepper motor drives for precise combustion control
• Modbus communication interface for seamless integration into building automation and control systems (BACS)
• Compatibility with AZL2 display units and ACS410 PC software for straightforward parameterization and diagnostics
• Durable construction designed for a service life of approximately 250,000 startup cycles (roughly 10 years)
• Comprehensive safety monitoring via a contact feedback network (CFN) for all safety-related digital inputs and outputs

Specifications

• Model Number: LMV37.420A1
• Mains Voltage: AC 120 V (+10% / -15%)
• Frequency: 50/60 Hz
• Power Consumption: Approximately 20 VA
• Parameter Set: North American
• Operating Temperature: -20 C to +60 C
• Protection Rating: IP40 (when integrated)
• Compatible Flame Detectors: QRA4, QRB, or Ionization probe
• Dimensions: 230mm (H) x 135mm (W) x 60mm (D)
• Weight: Approximately 0.655 kg to 0.78 kg

Applications

• Supervision and control of medium to high-capacity forced draft gas or oil burners
• Used in single-fuel industrial and commercial burner systems
• Integration into boiler plants and thermal process applications requiring linkageless ratio control
• Suitable for both intermittent and continuous operation (continuous operation requires an ionization probe)
• Ideal for OEMs building standardized burner control panels for the North American market