System Sensor 2451 AND 2451TH Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS and 2451TH Photoelectronic Smoke Detectors 2.4 inches (61 cm) Add 0.5 inches (13 cm) for thermal model 2451TH 4.0 inches (101 cm) 0.5 lb. (277 g) Temperature Range: 0 to 49 (32 to 120 Humidity Range: 10% to 93% Relative Humidity Air Velocity: 3000 Ft./Min. (15 M/S) Alarm: Reset by momentary power interruption Temperature Thermal: 135 (57 Ohio Avenue, St. Charles, Illinois 60174 FAX: 630-377-6495 Installing thoroughly read the System Sensor publication, Applications Guide for System Smoke Detectors, provides detailed information on detector spacing, zoning, wiring, and special applications. Copies this guide are available at no charge from System Sensor. installations in Canada, refer to CAN4-S524, Standard the Installation of Fire Alarm Systems and CEC Part 1, 32.) This manual should be left with the owner/user this equipment. This sensor must be tested and maintained following NFPA 72 requirements. This sensor be cleaned at least once a year. Description 2451 photoelectronic detectors utilize state-of-the-art, sensing chambers. These detectors are designed to open area protection, and to be used with compat- UL-listed control panels only. Model 2451TH has the specifications as Model 2451, with the addition of built-in fixed temperature (135 thermal detec- unit. The capability of plugging these detectors into variety of special bases makes them more versatile than direct-wired models. LEDs on each detector light to provide a local 360 alarm indication. They flash every ten seconds indi- that power is applied and the detector is operating The LEDs light continuously in alarm. Remote annunciator capability is available as an optional These detectors also have the Latching Alarm The alarm can be reset only by a momentary power These detectors may be tested by activating internal reed switch with a magnet, or by inserting a test card in a test slot after removing the detec- cover. 2451 has been approved for marine use in dry locations Underwriters Laboratory, Inc. The detector is to be used dry interior locations only. Selection and Wiring Guide to the installation instructions for the Plug-in Bases for base selection and wiring instructions. Sensor has a variety of detector bases available for smoke detector. This includes 2-wire applications with without relays and/or current limiting resistors, 4-wire 120VAC applications. (Note: the 120VAC detector base not available in Canada.) bases are provided with screw terminals for power, remote annunciator connections and relay contact if applicable. The electrical ratings for each combination are also included in the base instructions. 1 I56-277-10R Wiring must conform to applicable local codes, control unit. After all detectors have been installed, apply power to and regulations. Verify that all detector bases are installed, that initiating-device circuits have been tested, and the wiring is correct. (Refer to detector base for testing procedure.) Test the detector using the magnet or the test card as under TESTING. Reset the detector at the system control panel. Notify the proper authorities that the system is back on power from initiating-device circuits before detectors. Install detectors: a. Place the detector into the detector base b. Turn the detector clockwise until the detector drops covers can be used to help limit dust en