Metasys 2400AT Technical Bulletin

Direct 2-wire

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2400AT and 2400AIT Direct 2-Wire Smoke Detector
© 1995 Johnson Controls, Inc.
Code No. LIT-408145
Fire Initiating Devices and Notification Appliances Technical Manual 408
Conventional Products Section
Technical Bulletin
Issue Date 1095
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Summary of Contents for Metasys 2400AT

  • Page 1: Table Of Contents

    Fire Initiating Devices and Notification Appliances Technical Manual 408 Conventional Products Section Technical Bulletin Issue Date 1095 2400AT and 2400AIT Direct 2-Wire Smoke Detector Introduction Page General Description Installation Procedures General Information Mounting Spacing Wiring Installation Guidelines Installation Tamper-Proof Feature...
  • Page 2 2 Conventional Products—2400AT and 2400AIT Direct 2-Wire Smoke Detector...
  • Page 3: Introduction

    Follow only those instructions that apply to the model you are installing. Before you install any 2400AT and 2400AIT direct wire detectors, read and be familiar with: The Guide for Proper Use of System Smoke Detectors Technical...
  • Page 4: General Description

    These detectors also provide restorable, 135°F fixed-temperature heat detection. The 2400AT heat detection unit is integrated with the photoelectronic detector; in contrast, the 2400AIT’s heat detection unit is isolated from the photoelectronic smoke detector and can be monitored separately.
  • Page 5 5 mA at 10V 19 mA at 32V 15 mA at 24V Alarm Impedance 666 ohms Maximum 478 ohms Minimum Alarm Signal 15 mA Minimum in Alarm * Detector not in alarm (horn sounding). Conventional Products—2400AT and 2400AIT Direct 2-Wire Smoke Detector 5...
  • Page 6 6 Conventional Products—2400AT and 2400AIT Direct 2-Wire Smoke Detector...
  • Page 7: Installation Procedures

    Installation Procedures This section contains installation information for 2400AT and 2400AIT General direct wire smoke detectors. Instructions are given for mounting the Information detector, and basic wiring information is provided. Each 2400 series detector is supplied with a mounting bracket kit that...
  • Page 8: Spacing

    Connect detectors only to compatible control units as indicated in the Device Compatibility Technical Bulletin in the Fire Management Accessories Manual (FAN 445). 8 Conventional Products—2400AT and 2400AIT Direct 2-Wire Smoke Detector...
  • Page 9: Installation

    2. Line up arrows on the detector with arrows on the mounting bracket. 3. Turn the detector clockwise until it clicks into place. 4. Enable the tamper-proof feature. For instructions see the Tamper-Proof Feature section of this technical bulletin. Conventional Products—2400AT and 2400AIT Direct 2-Wire Smoke Detector 9...
  • Page 10: Tamper-Proof Feature

    2. Rotate the detector counterclockwise. 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—2400AT and 2400AIT Direct 2-Wire Smoke Detector...
  • Page 11: Testing And Maintenance Procedures

    5. The detector should not alarm (wait at least 20 seconds). 6. Remove the test card by sliding it clockwise before removing. 7. Repeat with the ALARM end of the test card. Conventional Products—2400AT and 2400AIT Direct 2-Wire Smoke Detector 11...
  • Page 12 Detectors that fail these tests should be cleaned as described in the Maintenance section of this technical bulletin and retested. If the detectors still fail these tests, they should be returned for repair. 12 Conventional Products—2400AT and 2400AIT Direct 2-Wire Smoke Detector...
  • Page 13: Maintenance

    8. Carefully push the screen onto the base making sure it fits tightly to the chamber. 9. Replace the cover by gently rotating it clockwise until it locks in place. Conventional Products—2400AT and 2400AIT Direct 2-Wire Smoke Detector 13...
  • Page 14 Removable Head Cover Test Slot Cleanable Screen ..(P/N RS24T) ..Removal Slot covscr5 Figure 7: Removal of Cover and Screen for Cleaning 14 Conventional Products—2400AT and 2400AIT Direct 2-Wire Smoke Detector...
  • Page 15: Limitations Of Smoke Detectors

    Code, Appendix B for information. Test your smoke detector system per NFPA-72-National Fire Alarm Code, or codes and standards specific to the country of installation, at least semiannually. Clean your smoke detectors regularly. Conventional Products—2400AT and 2400AIT Direct 2-Wire Smoke Detector 15...
  • Page 16: Limitations Of Sounders

    The sounder may not be heard by persons who are hearing impaired. 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—2400AT and 2400AIT Direct 2-Wire Smoke Detector...

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