Notifier 302 Series User Manual download pdf

dn-1271:A1 • 12/23/08 — Page 1 of 2

302 Series

Rate-Anticipation Heat Detectors

Conventional Initiating Devices

dn-1271:A1 • I-307

General

The Thermotech 302 Series rate-anticipation heat detectors

operate within a controlled range of two to three degrees of

their set points, regardless of the speed or rate of temperature

rise. These detectors are available in either 135°F (57.2°C) or

194°F (90°C) ratings.

The 302 Series are normally-open devices designed espe-

cially for fire detection and alarm systems.

Features

• Immediate response. The 302 Series activate whenever

ambient air temperature reaches a detector’s setting, elimi-

nating the thermal time lag inherent in conventional heat

detectors.

• Eliminates false alarms. The 302 Series do not respond

to momentary temperature fluctuations below the selected

temperature.

• Universal application. The 302 Series can be used in all

areas for any type of occupancy.

•Self-restoring.

• Hermetically sealed. Shock resistant, corrosion resistant,

and tamper-proof.

Principles Of Operation

The 302 Series rate-anticipation heat detectors respond and

activate the fire alarm immediately whenever the ambient tem-

perature reaches the preset temperature setting. Under rapid

heat rise conditions, the rate-anticipation feature enables the

detector to respond one to three degrees ahead of the setting.

At the same time, however, it does not respond to momentary

temperature fluctuations below the selected protection level,

thus eliminating false alarms. When temperature drops back

down below the protection level, the detector automatically

resets itself.

Dimensions (Model 302)

Total overall length: 4-1/8" (10.48 cm).

Base diameter: 2" (5.08 cm).

Electrical Ratings

Application Information

302 Series detector have a smooth ceiling UL rating of 50' x

50' (15.24 x 15.24 meters) and are the only type of heat detec-

tors having such a rating on both fixed temperature and rate

anticipation.

Agency Listings and Approvals

These listings and approvals apply to the modules specified in

this document. In some cases, certain modules or applications

may not be listed by certain approval agencies, or listing may

be in process. Consult factory for latest listing status.

• UL Listed: S539 (302-AW-135/-194; 302-ET-135/-194;

302-135-194)

• FM Approved: (302-AW-135/-194; 302-ET-135/-194;

302-135/-194)

• CSFM: 7270-0021:001

Voltage Current

6 - 125 VDC 5 amps

6 - 25 VDC 1 amp

125 VDC 0.5 amp

1271pho1.jpg

Cut-Away View

1271dia1.tif

1 2 3 4 5 6 7 8 9 10

302 Series 1
Made in the U.S. A 10