Metasys 2412 Series Technical Bulletin Download

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Fire Initiating Devices and Notification Appliances Technical Manual

408

Conventional Products Section

Technical Bulletin

Issue Date

1095

1995 Johnson Controls, Inc.

Code No. LIT-408150

Introduction

Page

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General Description

Installation Procedures

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General Information

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Mounting

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Spacing

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Wiring Installation Guidelines

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Installation

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Tamper-Proof Feature

Testing and Maintenance Procedures

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Testing

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Maintenance

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Limitations

2412, 2412TH, 2424, and 2424TH

Direct Wire Photoelectronic Smoke Detectors

Summary of Contents for 2412 Series

Page 1: ...s Inc 1 Code No LIT 408150 Introduction Page 3 General Description 3 Installation Procedures 7 General Information 7 Mounting 7 Spacing 8 Wiring Installation Guidelines 8 Installation 9 Tamper Proof Feature 10 Testing and Maintenance Procedures 11 Testing 11 Maintenance 14 Limitations 16 2412 2412TH 2424 and 2424TH Direct Wire Photoelectronic Smoke Detectors ...

Page 2: ...2 Conventional Products 2412 2412TH 2424 and 2424TH Direct Wire Photoelectronic Smoke Detectors ...

Page 3: ...l applications or for non United States installations applicable codes and standards specific to the country and locality of installation Failure to follow these directions may result in failure of this device to report an alarm or trouble condition or respond properly to an alarm condition Johnson Controls is not responsible for devices that have been improperly installed tested or maintained by ...

Page 4: ...relay module A77 716 series at the end of the detector power circuit When power is applied to and through the detectors the EOL power supervisory module is energized Its relay contacts close and provide a closed series circuit in the control panel s alarm initiating circuit A power failure or a break in the detector power circuit de energized the EOL module The relay contacts open and trigger a tr...

Page 5: ...erature Head Detector 135 F 57 C Electrical Ratings 2412 2424 System Voltage 12 VDC 24 VDC Maximum Ripple Voltage 4 volts Peak to Peak Supply Voltage Min Max 11 3 17 VDC 20 29 VDC Reset Voltage Control panel must fall below 2 4 volts to reset 0 73 VDC Minimum 0 8 VDC Minimum Standby Current 120 Microamperes Maximum Alarm Currents Min Max 35 77 Milliamperes 21 3 40 6 Milliamperes The alarm and auxi...

Page 6: ...6 Conventional Products 2412 2412TH 2424 and 2424TH Direct Wire Photoelectronic Smoke Detectors ...

Page 7: ...in either of two ways directly to 3 1 2 inch 88 9 mm or 4 inch 101 6 mm octagonal box 1 1 2 inch 38 1 mm deep electrical box Figure 1 to a 4 inch 101 6 mm square electrical box using the plaster ring with the supplied mounting bracket kit flmount2 Figure 1 Flush Mounting of 2412 2424 Smoke Detector on 3 1 2 Inch and 4 Inch Octagonal Box Tamper Resistant Tab m ountbrk Figure 2 2412 2424 Smoke Detec...

Page 8: ...y in the event of a fire For Initiating Device Circuit IDC wiring the wiring between interconnected detectors as well as the control panel it is recommended that the wire be no smaller than No 18 American Wire Gauge AWG 1 0 square mm However the screws and clamping plate in the detector can accommodate wire sizes up to No 12 AWG 3 3 square mm The use of twisted pair wiring for the detection power ...

Page 9: ... to the electrical backbox 2 Enable the tamper proof feature For instructions see the Tamper Proof Feature section of this technical bulletin 3 Wire the detector following the Wiring Installation Guidelines 4 Line up arrows on the detector with arrows on the mounting bracket 5 Turn the detector clockwise until it clicks into place 6 After all detectors have been installed apply power to the contro...

Page 10: ...nts removal of the detector without the use of a tool To make the detector tamper proof 1 Break off the smaller tab at the scribed line on the tamper proof tab on the detector mounting bracket Figure 2 2 Install the detector To remove the detector from the bracket once it has been made tamper proof 1 Use a small screwdriver to depress the tamper proof tab located in the slot on the mounting bracke...

Page 11: ...when they are tested and maintained in compliance with National Fire Protection Association NFPA 72 National Fire Alarm Code Before testing the detector check to ensure that the LEDs are blinking If they are not the detector has lost power check the wiring of it is defective return it for repair Functional Test Recessed Test Switch 1 Find the test switch is located on the detector housing Figure 6...

Page 12: ...ition of Test Switch Test Module MOD400R or MOD400 The MOD400R or MOD400 test module is used with an analog or digital voltmeter to check the detector sensitivity as described in the test module manual Aerosol Generator Gemini 501 1 Set the aerosol generator to represent 4 ft to 5 ft obscuration as described in the Gemini 501 manual 2 Use the bowl shaped applicator to apply aerosol until unit alar...

Page 13: ... 2 Hold the heat source about 12 inches 30 cm from the detector to avoid damaging the plastic When the heat rises to greater than 135 F the detector will latch in alarm 3 After the test the bimetallic collector will self restore 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 t...

Page 14: ... bladed screwdriver in the side slot of the detector cover Figure 7 2 Twist it slightly until the cover can be turned counterclockwise for removal 3 Vacuum the screen carefully without removing it If further cleaning is required continue with Step 4 otherwise skip to Step 9 4 Remove the screen by pulling it straight out Figure 7 5 Vacuum the inside 6 Clean the vaned chamber piece by vacuuming or b...

Page 15: ...2TH 2424 and 2424TH Direct Wire Photoelectronic Smoke Detectors 15 cov scr5 Removable Head Cover Cleanable Screen P N RS24 w o Thermal Test Slot Vaned Chamber Head Cover Removal Slot Figure 7 Removal of Cover and Screen for Cleaning ...

Page 16: ...ldering fires Photoelectronic detectors sense smoldering fires better than flaming fires Because fires develop in different ways and are often unpredictable in their growth neither type of detector is always best and a given detector may not always provide warning of a fire In general detectors cannot be expected to provide warnings for fires resulting from inadequate fire protection practices vio...

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