Kidde - Edwards 439D-8AW-R Polarized Fire Bell 24V

Product Description

The KIDDE - EDWARDS 439D-8AW-R is a polarized fire alarm bell designed for use in commercial and industrial fire detection and notification systems. Operating at 24 volts DC, this bell produces a loud, attention-commanding audible alert upon activation. The polarized design allows it to be wired in supervised circuits where polarity matters for system integrity. It is typically installed by licensed fire alarm technicians and electricians working within NFPA 72 code requirements. The 8-inch bell size delivers strong sound output suitable for areas where reliable audible notification is critical to life safety.

This fire bell is suited for commercial buildings, industrial facilities, schools, and similar occupancies that require compliant audible fire alarm notification. It is installed as part of a 24-volt DC fire alarm notification appliance circuit (NAC). The polarized wiring configuration makes it compatible with supervised NAC outputs on conventional and addressable fire alarm control panels. Installation is performed during new construction or retrofit fire alarm projects where code-compliant audible devices are required.

Key Features

• Polarized design for use on supervised 24-volt notification appliance circuits
• 8-inch bell diameter for strong audible output in commercial and industrial environments
• 24-volt DC operating voltage compatible with standard fire alarm control panel NAC outputs
• Sold individually as a single unit for flexible installation quantities
• Designed to meet fire alarm notification requirements under NFPA 72 guidelines

Compatibility

Designed as an OEM-style replacement or new-installation audible notification appliance for 24-volt supervised fire alarm notification appliance circuits on compatible fire alarm control panels.

Installation Notes

Installation must be performed by a licensed fire alarm technician or electrician in accordance with NFPA 72 and applicable local codes. Disconnect and lock out the fire alarm control panel NAC circuit before wiring the device. Observe polarity when connecting to the supervised circuit, as incorrect polarity will prevent proper operation and may cause a trouble condition at the panel. Following installation, perform a full system functional test to verify audible output and circuit supervision.