Johnson Controls Metasys 2400 User manual

Fire Initiating Devices and Notification Appliances Technical Manual 408
Conventional Products Section
Technical Bulletin
Issue Date 1095
© 1995 Johnson Controls, Inc. 1
Code No. LIT-408140
Introduction Page 3
● General Description 4
Installation Procedures 7
● General Information 7
● Mounting 7
● Spacing 8
● Wiring Installation Guidelines 8
● Installation 10
● Tamper-Proof Feature 10
Testing and Maintenance Procedures 11
● Testing 11
● Maintenance 13
● Limitations 15
2400 and 2400TH Direct 2-Wire Smoke Detectors

2 Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors

Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors 3
Introduction
This document contains important information about installing and
operating 2400 and 2400TH direct wire smoke detectors. These
conventional detectors are manufactured by System Sensor for use with
Johnson Controls systems. If you install this detector for someone else to
use, you must leave a copy of this document with the user.
These instructions provide information regarding mounting, spacing,
wiring, installation, testing, and maintenance. Follow only those
instructions that apply to the model you are installing.
Before you install any 2400 and 2400TH direct wire smoke detectors, read
and be familiar with:
●The Guide for Proper Use of System Smoke Detectors Technical
Bulletin in the Fire Initiating Devices and Notification Appliances
Technical Manual (FAN 408) that provides detailed information on
detector spacing, placement, zoning, wiring, and special 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 others.

4 Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors
The 2400 photoelectronic detectors use state-of-the-art, optical sensing
chambers. These detectors are designed to provide open area protection,
and are intended for use with compatible UL Listed 2-wire control panels
only. The detector’s operation and sensitivity can be tested in place.
Model 2400TH has the same specifications as model 2400, but also
features a restorable, built-in, fixed temperature (135°F) heat
detection unit.
These detectors are listed to UL 268 and are latching type system
detectors. When latched in alarm, the detectors must be reset by a
momentary power interruption.
A Light Emitting Diode (LED) on the detector provides a local indication
of the detector’s status. This LED blinks every ten seconds when the
detector is receiving power and ready in standby, and is latched on
continuously in alarm until the detector is reset. The detector provides an
output for connection to an optional remote annunciator (model RA400Z).
The remote annunciator mounts to a single gang box and provides a
supplementary alarm indication.
Table 1: 2400 Series Direct Wire Smoke Detectors
Model Control Description Operating Current Consumption
Panel Voltage Standby
(Min) Alarm (Max)
2400 2-wire Photo Detector 12/24 VDC 120 µA --
2400TH 2-wire Photo Detector with Fixed
Heat Sensor 12/24 VDC 120 µA --
2400AT 2-wire Photo Detector with Fixed
Heat Sensor and Horn 24 VDC 120 µA 67 mA
2400AIT 2-wire Photo Detector with
Isolated Heat Sensor 24 VDC 120 µA 67 mA
2412AT 4-wire Photo Detector with Fixed
Heat Sensor and Horn 24 VDC 120 µA 51 mA
2424AT 4-wire Photo Detector with Fixed
Heat Sensor and Horn 24 VDC 120 µA 43 mA
2424AIT 4-wire Photo Detector with
Isolated Heat Sensor and
Horn
24 VDC 120 µA 43 mA
General
Description

Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors 5
Table 2: Specifications Summary
Specifications
Diameter 5.5 in. (140 mm)
Height 3.14 in. (80 mm)
Add 0.5 in. (13 mm) for all models with a
“T” suffix (i.e., 2400TH)
Weight 0.7 lb (318 g)
Operating Temperature Range Model 2400--0 to 49°C (32 to 120°F)
Model 2400TH--0 to 38°C (32 to 100°F)
Operating Humidity Range 10 to 93% RH, Non-condensing
Maximum Air Velocity 3,000 ft/min. (15m/s)
Locking Alarm Reset by momentary power interruption
Fixed Temperature Head Detector 135°F (57°C)
Electrical Ratings
System Voltage 12/24 VDC
Maximum Ripple Voltage 4 volts Peak-to-Peak
Startup Capacitance 0.02
µ
F Maximum
Standby Ratings 8.5 VDC Minimum
35 VDC Maximum
120
µ
A Maximum
Alarm Ratings 4.2 VDC Minimum at 10 mA
6.6 VDC Maximum at 100 mA
Alarm current must be limited to 100 mA
maximum by the control panel. If used, the
RA400Z Remote Annunciator operates
within the specified detector alarm currents.
Detector Sensitivity Setting 3.0 ± 0.7 %/ft. obstruction
Reset Voltage 2.5 VDC Minimum
Reset Time 0.3 Sec. Maximum
Startup Time 34 Sec. Maximum

6 Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors

Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors 7
Installation Procedures
This section contains installation information for 2400 and 2400TH direct
wire smoke detectors. Instructions are given for mounting the detector,
and basic wiring information is provided.
!
CAUTION: Equipment hazard. Do not use in potentially
explosive atmospheres. Do not leave unused
wires exposed.
Each 2400 series detector is supplied with a mounting bracket kit that
permits the detector to be mounted in either of two ways:
●directly to 3-1/2 inch or 4 inch octagonal box, 1-1/2 inch deep
electrical box (Figure 1)
●to a 4 inch square electrical box using the plaster ring with the
supplied mounting bracket kit
flmount2
Figure 1: Flush Mounting of 2400TH Smoke Detector
on 3-1/2 Inch and 4 Inch Octagonal Box
Tamper
Resistant Tab
mountbrk
To make detector tamper-proof,
break off tab extension at scribed line.
Figure 2: 2400 Smoke Detector Mounting Bracket
General
Information
Mounting

8 Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors
NFPA-72-National Fire Alarm Code defines the spacing requirements for
smoke detectors. Typically, this is 30 feet when the detectors are
installed on a smooth ceiling. However, all installations must comply
NFPA-72-National Fire Alarm Code and/or special requirements of the
authority having jurisdiction.
All wiring must be installed in compliance with the National Electrical
Code, all applicable local codes, and any special requirements of the local
authority having jurisdiction. Proper wire gauges should be used. The
conductors used to connect smoke detectors to control panels and
accessory devices should be color-coded to reduce the likelihood of wiring
errors. Improper connections can prevent a system from responding
properly 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 base can
accommodate wire sizes up to No. 12 AWG (3.3 square mm). The use of
twisted pair wiring for the detection/power (+ and -) wires is
recommended to minimize the effects of electrical interference.
Smoke detectors and alarm system control panels have specifications for
allowable IDC resistance. Consult the control panel manufacturer’s
specifications for the total IDC resistance allowed for the control panel
being used before wiring the detector IDCs.
To make wire connections:
1. Strip about 3/8 inch of insulation from the end of the wire.
2. Slide the bare end of the wire under the clamping plate.
3. Tighten the clamping plate screw.
Please note carefully the wiring diagram for a typical 2-wire detector
system shown in Figure 3.
Spacing
Wiring
Installation
Guidelines

Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors 9
Figure 3: Wiring Diagram for the 2400 Smoke Detector Used
with a 2-Wire Control Panel
The detectors are marked with a compatibility identifier located as the last
digit of a five-digit code stamped on the back of the product. Connect
detectors only to compatible control units as indicated in the Device
Compatibility Technical Bulletin in the Fire Management Accessories
Manual (FAN 445).
Note: For system supervision, do not loop wire under Terminals 1 and 2.
This NotThis
wirguide
Figure 4: Electrical Connections
Note: If remote annunciator is not used, polarity to the detector may be
reversed.
Remote
Annunciator
smkwire
21
3
Initiatin
g
Loop
UL Listed
Control
Panel
Remote
Annunciator
2
1
3
Class A Optional Wirin
g
Note: If remote annunciator is not used, polarit
y
to detector ma
y
be reversed.
End-of-Line
(
EOL
)
Resistor

10 Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors
!
WARNING: Shock hazard. Disable the power IDCs before
installing detectors.
1. Wire each detector following installation guidelines.
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.
5. After all detectors have been installed, apply power to the control unit.
6. Test the detector as described in the Testing section of this
technical bulletin.
7. Reset the detector at the system control panel.
8. Notify the proper authorities that the system is in operation.
Dust covers can be used to help limit dust entry to the detector. However,
these covers are not a substitute for removing the detector during building
construction. Remove any dust covers before placing the system in
service.
This detector includes a tamper-proof feature that prevents 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 bracket.
2. Turn the detector counterclockwise for removal.
The tamper-proof feature may be defeated by breaking and removing
the plastic lever from the base. However, this prevents using the
feature again.
Installation
Limiting
Exposure to Dust
Tamper-Proof
Feature

Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors 11
Testing and Maintenance
Procedures
Before testing, notify the proper authorities that the smoke detector system
is undergoing maintenance and will be temporarily out of service. Disable
the zone or system undergoing maintenance to prevent unwanted alarms.
Detectors must be tested after installation and following periodic
maintenance.
Before testing the detector, look for the presence of the flashing LED. If it
does not flash, power has been lost to the detector (check the wiring), or it
is defective (return for repair).
After a detector is set into alarm by one of the following test methods and
the alarm activating device is removed from the detector, the system
should be reset at the control panel before testing any additional detectors.
After all testing is complete, notify the proper authorities that the system is
back in service.
Functional Test--Recessed Test Switch
1. A test switch is located on the detector housing (Figure 5).
2. Press and hold the recessed test switch with a 0.1 inch maximum
diameter tool.
3. The LED on the detector should light and report an alarm condition to
the control panel on the IDC within five seconds.
testswc3
Test Module
Socket
LED
Push recessed test switch
with a 0.1 inch max. diameter tool.
Recessed
TestSwitch
Figure 5: Top and Side Views Showing Position of Test Switch
Testing
Testing the
2400/2400TH

12 Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors
1. Remove the detector cover by placing a small-bladed screwdriver in
the side slot of the detector cover.
2. Twist it slightly until the cover can be turned counterclockwise for
removal.
3. Insert the NO ALARM end of the test card fully into the test slot
(Figure 6), then slide it counterclockwise until it stops.
4. The detector should not alarm after 20 seconds.
5. Remove the test card by sliding it clockwise before removing.
6. Insert the ALARM end.
7. The LED should latch on within 20 seconds.
An alarm should also be initiated at the Panel 6.
8. Put the cover back by gently rotating it clockwise until it locks
in place.
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.
1. Set the aerosol generator to represent 4%/feet to 5%/feet obscuration
as described in the Gemini 501 manual.
2. Using the bowl-shaped applicator, apply aerosol until unit alarms.
Direct Heat Test
To test the bimetallic thermal collector on the 2400TH:
1. Use a low powered heat gun or blow dryer, and aim the heat source
across the detector.
2. Hold the heat source about 12 inches (30 cm) from the detector to
avoid damaging the plastic.
3. When the heat rises to greater than 135°F, the detector will latch
in alarm.
4. 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, they should be returned for repair as detailed in the
Material Management Manual (FAN 627.5).
Calibrated Test
Card (R59-18-00)
Test Module
(MOD400R or
MOD400)
Aerosol
Generator
(Gemini 501)
Testing the
2400TH Only

Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors 13
Before removing the detector, notify the proper authorities that the smoke
detector system is undergoing maintenance and will be temporarily out of
service. Disable the zone or system undergoing maintenance to prevent
unwanted alarms. After maintenance is performed on a detector, it should
be functionally tested to assure proper operation.
1. Remove the detector cover by placing a small-bladed screwdriver in
the side slot of the detector cover.
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 6).
5. Vacuum the inside.
6. Clean the vaned chamber piece by vacuuming or blowing out dust and
particles.
7. To replace the screen, orient it so that the arrow on top aligns with the
test module socket of the detector.
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.
10. Notify the proper authorities that the system is back online.
Maintenance

14 Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors
cov&scr5
Removable
Head Cover
Cleanable Screen
P/N RS24
(
w/o Thermal
)
.....
Test Slot
Vaned Chamber
Head Cover
RemovalSlot
Figure 6: Removal of Cover and Screen for Cleaning

Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors 15
This smoke detector is designed to activate and initiate emergency action,
but will do so only when used in conjunction with other equipment.
This detector is designed for installation in accordance with NFPA
Standards 71 and 72.
●Smoke detectors cannot work without power. Alternating Current
(AC) or Direct Current (DC) powered smoke detectors will not work
if the power supply is cut off for any reason.
●Smoke detectors will not sense fires which start where smoke does
not reach the detectors. Smoke from fires in chimneys, in walls, on
roofs, or on the other side of closed doors may not reach the smoke
detector and alarm it.
●A detector may not detect a fire developing on another level of a
building. For this reason, detectors should be located on every level
of a building.
●Smoke detectors have sensing limitations. Ionization detectors offer a
broad range fire-sensing capability, but they are better at detecting
fast, flaming fires than slow, smoldering 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, violent explosions, escaping gas,
improper storage of flammable liquids like cleaning solvents, other
safety hazards, or arson.
This detector is UL Listed to operate in a maximum air velocity of
3000 ft./min. Air velocity, along with other factors, may affect
detector sensitivity. See the 1993 NFPA-72-National Fire Alarm
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 and take care of your smoke detectors
regularly. Taking care of the fire detection system you have installed
will measurably reduce your product liability risks.
Limitations

16 Conventional Products—2400 and 2400TH Direct 2-Wire Smoke Detectors
Notes
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