INSTALLATION AND MAINTENANCE INSTRUCTIONS
FOR MODEL 2312/24TB
Before installing detectors, please thoroughly read System Sensor Manual I56-407-XX, Guide for Proper Use of System Smoke Detectors, which provides detailed information on detector spacing, placement, zoning, wiring, and special applications. Copies of this manual are available at no charge from System Sensor.
GENERAL DESCRIPTION:
Model 2312/24TB is a 4-wire combination smoke/heat detector. In addition to photoelectronic smoke detection, two supervised electronic thermistors provide restorable 135°F fixed temperature heat detection. The installation is simplified by the use of an adaptor bracket and a plug-in screw terminal block which can be pre-wired to the system allowing the detector to be easily installed or removed for cleaning. It is designed to provide open area protection, and to be used with UL listed 4-wire control panels. The detector’s sensitivity can be tested in place using the MOD400R field sensitivity test module.
The 2312/24TB is listed to UL 268 and is a latching type system detector. When latched in alarm, the detector must be reset by a momentary power interruption.
An LED on the detector provides a local indication of the detector’s status. If power is applied to the detector, and the detector is functioning properly in standby, the status LED will blink every 10 seconds. The detector performs a self-test on its smoke sensing chamber and internal electronics every 40 seconds. If this test fails, the detector stops blinking the status LED in standby, and the LED will remain off. In alarm, the LED will be latched on continuously until the detector is reset.
SPECIFICATIONS: |
|
|
|
|
Diameter: |
5.5 inches |
(14 cm) |
|
|
Height: |
2.5 inches |
(6.4 cm) |
|
|
Weight: |
0.7 lb |
(310 gm) |
|
|
Operating Temperature Range: |
0° to +38° C |
(32° to 100° F) |
|
|
Operating Humidity Range: |
10% to 90% Relative Humidity Non-condensing |
|
|
|
Latching Alarm: |
Reset by momentary power interruption. |
|
|
|
Test Feature: |
Recessed test switch. |
|
|
|
Maximum Air Velocity: |
3000 Ft./Min. (15 Meters/Sec.). |
|
|
|
Sensitivity: |
Nominal 3%/Ft. |
|
|
|
Heat Sensor: |
135°F Fixed Temperature Electronic Thermistor |
|
|
|
ELECTRICAL RATINGS: |
|
|
|
|
System Voltage nominal: |
12 or 24 VDC |
|
|
|
minimum: |
8.5 VDC |
|
|
|
maximum: |
35 VDC |
|
|
|
Maximum Ripple Voltage: |
30% of nom. Voltage (peak to peak) |
|
|
|
Standby Current: |
120 µA max. |
|
|
|
Alarm Current: |
10mA minimum. 50mA maximum. |
|
|
|
Reset Voltage: |
0.8 VDC minimum |
|
|
|
Reset Time: |
6 Sec. maximum |
|
|
|
Start-up Time: |
34 Sec. maximum |
|
|
|
|
|
|
||
|
(After 60 Sec. Reset) |
|
|
|
|
|
|
||
|
|
|
||
|
|
|
||
EOL relay: |
A77-716B, 12/24 Volt |
|
|
|
ALARM INITIATION CONTACT RATINGS: |
|
|
Resistive or inductive load (60% power factor): |
|
|
Form A: |
2.0A @ 30 VAC/DC |
S0175-00 |
|
|
Figure 1. 2312/24TB Smoke/Heat Detector |
|
|
|
D300-05-00 |
|
I56-431-06 |
|
System Sensor, 3825 Ohio Avenue, St. Charles, Illinois 60174, 1-800-SENSOR2, FAX: 708-377-6495 |
|
MOUNTING:
Each 2312/24TB detector is supplied with a mounting bracket that permits the detector to be mounted:
1.To a single gang box, or
2.Directly to a 3-1/2 inch or 4 inch octagonal box, or
3.To a 4 inch square electrical box by using a plaster ring.
|
|
|
|
|
|
S0176-00
Figure 2. 2312/24TB smoke detector mounting bracket
TAMPER RESISTANCE:
This detector includes a tamper-resistant capability that prevents its removal from the bracket without the use of a tool. To make the detector tamper-resistant, remove the smaller tab by breaking it at the scribed line on the tamper resistant tab before installing the detector. The tamper resistant tab is on the detector mounting bracket.
To remove a tamper-resistant detector from the bracket, use a pocket screwdriver, or similar tool, to depress the tamper-resistant tab and turn the detector counterclockwise. The tab is accessible through the slot on the mounting bracket.
WIRING INSTALLATION GUIDELINES:
All wiring must be installed in compliance with the National Electrical Code, 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 prevent wiring mistakes. Improper connections can prevent a system from responding properly in the event of a fire.
The screw terminal block will accept 14 – 22 gauge wire. For best system performance, all wiring should be installed in separate grounded conduit; do not mix fire system wiring in the same conduit as any other electrical wiring. Twisted pair may be used to provide additional protection against extraneous electrical interference.
Smoke detectors and alarm system control panels have specifications for allowable loop resistance. Consult the control panel manufacturer’s specifications for the total loop resistance allowed for the particular model control panel being used before wiring the detector loops.
Wire connections are made by stripping about 1/4 inch of insulation from the end of the feed wire, inserting the wire into the appropriate terminal, and tightening the screw to secure the wire in place.
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
Figure 3. Wiring diagram for 2312/24TB detector
S0177-00
D300-05-00 |
2 |
I56-431-06 |
Loading...