The Gentex GN-300 (120VAC/9VDC) Series photoelectric smoke alarms are designed for residential and commercial residential applications, including but not limited to, homes, apartments,
hospitals, hotels and motels, in compliance with UL 217 and NFPA 72. The GN-300 Series is engineered to virtually eliminate nuisance alarms and deliver outstanding performance wherever
reliable fire and smoke protection is required. The GN-300 Series is a 120VAC with a 9 VDC alkaline battery for back-up in the event building power is lost. The battery impedance is
verified and the smoke 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-300
Series is provided with a push button test that simulates a 3.5% actual smoke condition in compliance with NFPA 72 and UL Standards. Tandem connection capabilities up to 12 units is
available on the GN-300 Series. The GN-300 Series has tandem capabilities with existing Gentex smoke alarms. The GN-300 Series provides a continuous tone.
FEATURES
- Available in 120VAC with 9V battery backup power
- Battery drawer on side of unit to allow for battery replacement without removing unit from wall or ceiling
- Low or missing battery indicator
- 177 Candela Rating (UL1971)
- Horn frequency 3150 Hz (Nominal)
- Push button test feature
- Nominal 2.5% Sensitivity
- 85dBA continuous solid-state piezo horn
- Fully Insect Screened
- Mounting Hardware
- Sure-LockTM locking pin to detour alarm tampering
- Listed by Underwriters Laboratories, California State Fire Marshal (CSFM) and the Bureau of Standards and Appeals (NYC)
- Warranty is 1 Year From Date of Purchase
Wiring Diagram:
How Your Photoelectric Smoke Alarm Works:
The GN-300 Series smoke alarm operates on the photoelectric light scatter principle. The unit's sensing chamber houses a light source and a light sensor.
The darkened sensing chamber is exposed to the atmosphere and designed to permit optimum smoke entry from any direction while rejecting light from outside the smoke alarm. The light
source is an infrared (invisible) LED which pulses every 8 seconds. The light sensor is a photodiode matched to the light frequency of the LED light source. Under normal conditions, the
light generated by the pulsing infrared LED is not seen by the light sensor, as it is positioned out of the direct path of the light beam. When smoke enters the sensing chamber, light
from the pulsing LED light source is reflected by the smoke particles onto the photodiode light sensor. At the first sighting of smoke, the device is put into a pre-alarm mode. This is
indicated by a rapidly flashing red LED on the face of the smoke alarm. Once the light sensor confirms smoke for 2 consecutive pulses inside the chamber, the light sensor produces the
signal necessary to trigger the device and sound the electronic horn.
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