The GN-503 (120VAC/9VDC) Series of combination photoelectric smoke and electrochemical sensor carbon monoxide alarms are for use as evacuation devices in all dwelling units, including but not limited to homes, apartments, hospitals, hotels, motels and other commercial occupancies. The GN-503 Series is listed in compliance with ANSI/ UL 217, ANSI/UL 2034, for installation per NFPA 720 and NFPA 72.

Available in three models, the GN-503 Series is engineered to virtually eliminate nuisance alarms and deliver outstanding performance wherever reliable smoke and CO protection is required. The GN-503F features one (1) set of Form A/Form C contacts that activate for smoke and/or CO events. The GN-503FF features two (2) sets of Form A/Form C contacts that activate independently for smoke and CO events. Both the GN-503F and GN-503FF provide a connection to a protected premises alarm system to provide a supervisory/ trouble signal.

Main Features

• GN-503 available in 120VAC with 9VDC battery back-up
• Horn frequency 3100 Hz (nominal)
• Meets sensitivity requirements of ANSI/UL 2034
• F Model: One (1) set of Form A/Form C contacts that activate for smoke and/or C events
• FF Model: Two (2) sets Form A/Form C contacts that activate independently for smoke and CO events.
• Relay contacts operate on battery back-up
• Push button self test feature
• Push button functional test feature
• Quick-disconnect wiring harness
• Non-latching (self restoring) alarm
• Fully insect protected
• Red LED pulses every 30 seconds, green LED for AC power on
• Mounting hardware adapts to standard junction boxes, including but not limited to 4x4x2-1/8 octagon
• Dust cover to prevent contamination during installation
• Low or missing battery indicator