Page 1: Table Of Contents
Fire Initiating Devices and Notification Appliances Technical Manual 408 Conventional Products Section Technical Bulletin Issue Date 1095 2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors Introduction Page General Description Installation Procedures General Information Base Selection and Wiring Guide Spacing Installation...
Page 2 2 Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors...
Page 3: Introduction
Appliances Technical Manual (FAN 408), which provides detailed information on detector spacing, placement, zoning, wiring, and special applications or, for non-United States installations, applicable codes and standards specific to country and locality of installation Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors 3...
Page 4: General Description
Model 2451TH has the same specifications as Model 2451, with the addition of a built-in fixed temperature 135°F (57°C) thermal detection unit. The capability of plugging models 2451 and 2451TH into a variety of special bases makes them more versatile than equivalent direct-wired models.
Page 5 (for use with B401, B401R) Surface Mounting Kit SMK400 (for use with B401, B401R) A77-716B End-of-Line Relay for Power Supervision Replacement Screen RS24 for the 2451 RS24T for the 2451TH Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors 5...
Page 6 6 Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors...
Page 7: Installation Procedures
The conductors used to connect smoke detectors to control panels and accessory devices should be color-coded to reduce the likelihood of wiring errors. Incorrect connections can prevent a system from responding properly in the event of a fire. Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors 7...
Page 8: Spacing
Room configuration and operating environment may require a reduction in the standard maximum 900 square foot coverage for each detector. 8 Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors...
Page 9: Installation
Remove any dust covers before placing system in service. If detectors are mounted in a construction area, with or without the dust cover in place, each detector should be thoroughly cleaned, inspected, and tested after construction is complete. Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors 9...
Page 10: Tamper-Proof Feature
Figure 3: Removing the Detector Head from the Base The tamper-proof feature may be defeated by breaking and removing the plastic lever from the base. However, this prevents using the feature again. 10 Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors...
Page 11: Testing And Maintenance Procedures
Figure 4: Bottom and Side Views Showing Position of Test Magnet 2. The LEDs should latch on within five seconds indicating alarm and annunciating the panel. 3. Reset the detector at the system control panel. Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors 11...
Page 12 The Gemini 501 Aerosol Generator is UL Listed, and can be ordered from: Gemini Scientific Corporation 1122 Aster Avenue Sunnyvale, CA 94086 Contact Gemini at (408) 554-0310 or fax (408) 554-7143. 12 Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors...
Page 13 Maintenance section of this technical bulletin and retested. If the detectors still fail these tests, they should be returned for repair. After testing is complete, notify the proper authorities that the system is back in service. Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors 13...
Page 14: Maintenance
8. Replace cover by gently rotating it clockwise until it locks in place. 9. Reinstall the detector. 10. Notify the proper authorities that the system is back online. 14 Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors...
Page 15 R S 24 T (w /T he rm al) H ead C over V aned Ch am ber R em oval S lot c o v& s c r5 Figure 5: Cleaning the 2451 and 2451TH Detectors Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors 15...
Page 16: Limitations
Controls Group FAN 408 507 E. Michigan Street Fire Initiating Devices and Notification Appliances Technical Manual P.O. Box 423 Printed in U.S.A. Milwaukee, WI 53201 16 Conventional Products—2451 and 2451TH Conventional Plug-In Photoelectronic Smoke Detectors...

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