The GN-503 (120VAC/9VDC) Series of combination photoelectric smoke and electrochemical sensor carbon monoxide alarms are for use as an evacuation device 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 UL 217, and UL 2034, for installation per NFPA 720 and NFPA 72.
Available in two 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-503 Series is provided with a 9VDC alkaline battery for electrical backup in the event building power is lost. The battery impedance is verified and the alarm provides a low or missing battery warning. The battery drawer provides easy replacement without removing the unit from the wall or ceiling.
The Gentex GN-503 Series is provided with a self-test and functionality test feature. The self-test notifies if the smoke/CO alarm is functioning properly or needs attention. The functionality tests that the smoke/CO alarm is operating properly. The self and functionality tests are in compliance with NFPA 72 and UL Standards.
Features of the combination alarm series include DUALINK® differentiating tones indicating a smoke alarm (temporal 3) or a CO alarm (temporal 4), and tandem capabilities with all Gentex tandem interconnect capable alarms. Options include a Form A/Form C dry contacts for remote annunciation and connection to a protected premises alarm system to provide a supervisory/trouble signal. The GN-503 provides a Temporal 3 evacuation tone for smoke alarm and all units provide a Temporal 4 tone for CO alarm annunciation. The Temporal 3 evacuation tone for the smoke alarm will take precedence over the Temporal 4 tone for the CO alarm.