Description

The Edwards Est 283B-PL Series heat detectors offer fixed temperature or combination rate-of-rise and fixed temperature detection.

Heat detectors are most suitable for environments where rapid-fire development can be expected. When selecting the location on the ceiling for the heat sensor, do not locate it in the direct path of hot or cold airflow. Refer to the detector specifications for the recommended maximum spacing. Earlier detector response maybe obtains by reducing the spacing between detectors.

Also, a temperature increase at the sensor of 15°F (9°C) or more per minute activates the rate-of-rise feature. This closes the contacts in the sensor to transmit the alarm condition to the fire alarm control panel. When the rate-of-rise element alone has been activate, the sensor is self-restoring.

If the temperature of the center disk rises to the sensor’s rated temperature, the fixed temperature element activates. This closes contacts in the sensor and transmits an alarm condition to the fire alarm control panel. The fixed temperature element is non-restorable and, when activated, the detector must be replace. The need for replacement comes indicated when the center disk has fallen free from the detector.

In general, Edwards Est 283B-PL series heat sensors come standard with a white plastic reversible mounting plate. The plate comes designed for surface or flushes mounting as well as installs directly to a standard North American 3½ or 4-inch octagon box. Once the mounting plate is fix, a simple twist will lock the sensor in place. It can be remove using a screwdriver to release the tamper-resistant locking finger. This helps prevent unauthorized removal.

Features / Specifications

• Single pole — normally open contact
• Low profile with mounting plate
• Pure white finish
• Mounting flexibility with screw terminals
• Easy twist-on installation
• On-site testing of the rate-of-rise feature
• Positive operating indication — for fixed temperature element