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, UL 2034, for installation per NFPA 720 and NFPA 72.
The GN-503 Series is provided with a 9VDC alkaline battery for electrical back-up 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 are 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), 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 Temporal 3 evacuation tone for smoke alarm and all units provide Temporal 4 tone for CO alarm annunciation. The Temporal 3 evacuation tone for smoke alarm will take precedence of the Temporal 4 tone for CO alarm.