T302IS Intrinsically Safe Rate of Rise Heat Detector
- Thermal Sensor with rate-of-rise 140°F (60°C) fixed set point
- BASEEFA approved for use in EEx ia IIC T5 hazardous locations
- Locking feature for tamper resistance
- FM approved for use in Class I Division 1 Groups A,B,C,D hazardous (classified) locations
- UL approved as a heat automatic fire detector
- Two LED alarm indicators provide 360º visibility
- Functional Test Capability without requiring heat source
- Optional remote LED alarm indicator
THE DETECTOR
Intrinsically safe detectors are used in hazardous locations where explosive levels of gas or vapors are normally or potentially present. The Model T302IS circuit power levels are limited so the potential to ignite an explosive atmosphere is eliminated.
Intrinsically safe detectors must be compatible with the system control panel for proper use. An intrinsically safe barrier must be installed at the point where the intrinsically safe circuit connects to the control panel. The barrier limits the available voltage and current available on the circuit to safe levels.
The SST Model T302IS Intrinsically Safe rate-of-rise Heat Detector with fixed temperature alarm set point uses a state-ofthe- art dual thermister sensing circuit. These detectors are designed to provide open area protection when used with the NOVA-5000 Detection and Control System. The Model T302IS may be used for Releasing Device Service.
The heat detector is installed into its accessory base with a simple twist-lock action, which prevents unauthorized removal of the detector. Operating power is provided over the 2-wire detection circuit from the Control System. Proper operation of the detector is indicated by two red Light Emitting Diodes (LED), which provides a local, 360º visual indication of detector status. For installations where the detector is not visible (such as above a false ceiling), a remote LED may be connected to the unit. When the detector senses a fire, it latches into alarm and remains in this condition until reset from the NOVA-5000 System control panel.
In-place test features are provided in the Model T302IS to insure the integrity of the detector. A test magnet, when properly placed near the detector, simulates the effect of heat.
Application Information
The Model T302IS Heat Detectors are designed for use in both “ordinary” and hazardous locations. For ordinary use, they may be connected to the associated Model 5010 Fire Module without using the intrinsically safe barrier. For hazardous locations, a barrier must be used at the control in accordance with the National Electric Code and/or the local authority having jurisdiction.
The detectors should be spaced no more than 25 feet apart in the protected area. This rating is based on being located on a smooth ceiling, with the distance between the detector and any wall or partition no more than 12.5 feet. In open joist or beam construction, closer spacing is required.
LIFE SAFETY: Heat detectors protect property only. In most fires, hazardous levels of smoke, heat and toxic gasses can build up before a heat detector would initiate an alarm. In cases where life safety is a factor, smoke detectors are recommended.
Technical Specifications and Ordering Information
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TECHNICAL SPECIFICATIONS
| Detection Method: | Dual thermister rate-of-rise with fixed temperature alarm Permanently calibrated at factory. |
| Operating Voltage: | 15 to 28 VDC Provided by the SST NOVA-5000 Control System. |
| Alarm Set Point: | +140°F, 0 to +60°C Unit will draw a 100 microamp peak current at startup. |
| Operating Environment: | +32 to +100°F, 0 to +40°C for UL/FM installations 0 to +50°C, +32 to 122°F for BASEEFA/LPCB installations 10 to 93% relative humidity Humidity should be below the dew point (non-condensing). |
| Intrinsic Safety Rating: | EEx ia IIC T5 Class I, Div. 1, Groups A,B,C,D |
| Size/Weight: | 4.0 inches (10.4 cm) diameter x 2.1 (5.4 cm) inches high, 3.5 ounces (150 g) |
ORDERING INFORMATION
| PART NUMBER | DESCRIPTION |
| 302-01 | Model T302IS Intrinsically Safe Fixed Temperature Rate-of-rise Heat Detector Requires mounting base for installation. |
| 280-12 | Intrinsically Safe Mounting Base Installs on US standard 3 to 4 inch round, square or octagonal wiring box. Provides twistlock plug-in for detector. |
| 289-02 | Intrinsically Safe Barrier Use to connect intrinsically safe field circuits to SST Model 5010 Smoke/ Fire Detection Module. |
| 288-98 | Remote Alarm Indicator Mounts on US standard single gang outlet box. |
| 290-01 | Functional Test Magnet Simulates the effects of heat to test alarm capability of detector. |
