System Sensor 2412AT, 2424AT and 2424AIT Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS 2424AT, and 2424AIT Wire Photoelectronic with Heat Smoke Detectors Division of Pittway 3825 Ohio Avenue, St. Charles, Illinois 60174 FAX: 630-377-6495 with Thermal: Temperature: Humidity: Indicator: Alarm: Signal: Ratings: Voltage: Supply: Time: Characteristics: inches (14 cm) inches (8.1 cm) lb. (310 g) to 38(cid:176) C (32(cid:176) to 100(cid:176) F) to 95% Relative Humidity Non-condensing State LED by momentary power interruption minimum interrupted tone when individual unit is in alarm or when the voltage is reversed. or 2424AIT Unfiltered Unfiltered 7mA Maximum with RA400Z Remote Annunciator LED) m A Max. m A Max. seconds maximum Form A (SPST-NO) for alarm initiation 1.25A at 30 VAC/DC Installing thoroughly read the System Sensor manual I56-407- Guide for Proper Use of System Smoke Detectors, which detailed on detector spacing, zoning, wiring, and special applications. Copies this manual are available at no charge from System (For installations in Canada refer to CAN Standard for the Installation of Fire Alarm Systems CEC Part 1, Sec. 32.) Description smoke detectors are designed to provide area protection and to be used with UL-listed 4-wire panels. The 2412AT operates at 12 VDC and the and 2424AIT operate at 24 VDC. The sensor in this operates on the light scattering principle and a unique photo-optic sensing chamber that good smoke entry while minimizing the effects of light. These detectors also provide restorable F fixed-temperature heat detection. The 2412AT and heat detection unit sensor while the 2424AIT heat detection is isolated from the photoelectronic smoke sensor and be monitored separately. In addition, a piezoelectric in each detector produces an interrupted, 85 dBA with tone when the individual detector alarms or the supply voltage polarity is reversed. LED on each detector lights to provide a local alarm and will remain on when the supply polarity is A screw terminal is provided for a remote LED optional accessory (RA400Z). These detectors listed to UL268 and are latching type system detectors. alarm can be reset only by momentary power For testing, these detectors have a test switch may be tested by inserting a calibrated test card in a test after removing the detector cover. detector contains one Form A (SPST-NO) contact for to an alarm-initiating circuit. Supervision of the power is accomplished by installing a Power End-of-Line Relay Module (A77-716) at the end the detector power loop. When power is applied to and the detectors, the EOL Power Supervisory Module energized. Its relay contacts close and provide a closed circuit in the control panel alarm-initiating loop. A failure or break in the detector power loop de- the EOL Module. The relay contacts open and a trouble signal at the control panel. 1. Flush mounting of detector on 4-inch box: 2. Detector mounting bracket: MAKE DETECTOR TAMPER RESISTANT, OFF TAB EXTENSION SCRIBED LINE Instructions 2400 Series detector unit is supplied with a mounting kit that permits several mounting techniques: Units may be mounted directly to a 3-inch or 4-inch octagonal, inch deep electrical box. (See Figures 1 and 2.) Units may be mounted to a 4-inch square electrical box by plaster ring with the supplied mounting bracket kit. Feature detector includes a tamper-proof feature that, when prevents removal of the detector without the use a tool. To activate this feature, cut off smaller tab at the line on tamper-proof tab located on the detector bracket (see Figure 2). Install the detector. To the d