DMPR-RS324 Johnson Controls

Overview

The DMPR-RS324 from Johnson Controls is an Electric Fuse Link (EFL) and SP100 position indicator switch assembly designed for use with combination fire and smoke dampers. This factory-installed, heat-responsive safety device is engineered to automatically manage damper positioning during emergency conditions to prevent the spread of fire and smoke through HVAC ductwork.

Features

• Combined heat-responsive device and position indicator switches in a single integrated unit.
• Automatic closing and locking mechanism when critical temperature thresholds are exceeded.
• Manual reset button that allows the unit to be easily restored after system testing or accidental tripping.
• Integrated position status tracking to communicate whether the damper is open or closed during emergency events.

Specifications

• Temperature Rating: 212°F (100°C) thermal response model.
• Compatibility: Designed exclusively for use with Johnson Controls fire/smoke dampers utilizing electric actuators.
• Classification: UL Classified heat responsive device.
• Mounting: Factory-installed (cannot be added field-side, though replacements are permitted with local authority approval).

Applications

• Commercial HVAC fire and smoke management systems.
• Control and isolation of ductwork pathways during fire or smoke detection events.
• Automated building safety systems requiring localized thermal link disruption and position feedback.