Data Sheet S85001 0261 PL Series Heat Detectors Brochure

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Page 1 of 2 DATA SHEET S85001-0261

Not to be used for installation purposes. Issue 4

Edwards Signaling Catalog u Conventional Initiating

06-27-13

Overview

280B-PL Series heat detectors offer fixed temperature or combi-

nation rate-of-rise and fixed temperature detection.

RATE-OF-RISE: 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 activated, the sensor is self-restoring.

FIXED TEMPERATURE: 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 trans-

mits an alarm condition to the fire alarm control panel. The fixed

temperature element is non-restorable and, when activated, the

detector must be replaced. The need for replacement is indicated

when the center disk has fallen free from the detector .

Standard Features

• UL listed for 50 ft. (15.2m) spacing

• 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 rate-of-rise feature

• Positive operating indication — for fixed temperature element

Application

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 direct path of hot or

cold air flow. Refer to the detector specifications for the recom-

mended maximum spacing. Earlier detector response may be

obtained by reducing the spacing between detectors.

Installation

Edwards 280B series heat sensors come standard with a white

plastic reversible mounting plate. The plate is designed for surface

or flush mounting and installs directly to a standard North Ameri-

can 3½ or 4 inch octagon box. Once the mounting plate is fixed, a

simple twist will lock the sensor in place. It can be removed using

a screwdriver to release the tamper-resistant locking finger. This

helps prevent unauthorized removal.

Rate-of-rise/Fixed

Temperature

Heat Detectors

280B-PL Series

Page 2 of 2 DATA SHEET S85001-0261

Not to be used for installation purposes. Issue 4

06-27-13

Contact us...

Phone: 1-800-336-4206

Web: www.edwardssignaling.com

Edwards Signaling is

an EDWARDS brand.

3 Farm Glen Boulevard

Farmington, CT 06032

In Canada, contact Chubb Edwards...

Email: inquiries@chubbedwards.com

Web: www.chubbedwards.com

© 2013 UTC Fire & Security Americas

Corporation, Inc. All rights reserved.

Specifications subject to change

without notice. Edwards is part of UTC

Climate, Controls & Security, a unit of

United Technologies Corporation. Specifications

Mounting

The plastic mounting plate is molded to accommodate

exposed wiring.

Catalog Number 281B-PL 282B-PL 283B-PL 284B-PL

UL Temperature Rating 135°F (57°C) 194°F (90°C) 135°F (57°C) 194°F (90°C)

UL Max Ambient Temp. at

Ceiling 100°F (38°C) 150°F (66°C) 100°F (38°C) 150°F (66°C)

Detector Type

Fixed Temperature and Rate-of-

Rise Rate-of-rise:

15° F (9° C), self restoring

Fixed Temperature Only

UL Recommended Cover-

age* 2,500 ft.² (232 m²)

UL Recommended Spacing 50 ft. (15.2 m)

FM Recommended Spacing 30 ft. (9.14 m)

UL Maximum Distance from

Wall

25 ft. (7.6m) from any wall or projection extending down from the

ceiling more than 12 inches (305 mm)

Contacts – Rating Single Pole Normally Open 3.0 amps at 6 to 125 Vac; 1.0 amp at

6 to 24 Vdc; 0.3 amps at 125 Vdc; 0.1 amps at 250 Vdc

Operating Environment Indoor – Dry

Agency Listings UL, FM, CSFM

* Maximum detector coverage has been determined by UL to provide detection time equal to sprinkler devices

spaced at 10 ft (3.05m) intervals on a smooth ceiling 15 feet 9 inches (4.8m) high. Higher ceilings may adversely

affect detection time. Earlier detection may be obtained by reducing the spacing between sensors. (See NFPA 72,

Chapter 5)

WARNING – Use For Property Protection Only: Heat sen-

sors do not protect life against fire and smoke. In most fires,

hazardous levels of smoke, heat and toxic gases can build up

before a heat detector would initiate an alarm. Independent

studies indicate that heat detectors should only be used when

property protection alone is involved. In cases where life safety

is a factor, the use of smoke detectors is recommended.

Under no circumstances should heat detectors be relied upon

as the sole measure to ensure fire safety. However, if they are

spaced in accordance with the directions in the Specifica-

tions table, these sensors can contribute, within an overall

fire safety program, to reducing the risk of avoidable property

losses.

Ordering Information

Cat. No. Description Ship Wt.

lb (kg)

281B-PL Heat Detector, 135°F (57°C), Rate-of-Rise and Fixed Temperature

1.0 (0.5)

282B-PL Heat Detector, 194°F (90°C), Rate-of-Rise and Fixed Temperature

283B-PL Heat Detector, 135°F (57°C), Fixed Temperature

284B-PL Heat Detector, 194°F (90°C), Fixed Temperature

Detector Accessories

280A-PL Plastic Mounting Plate – White, Reversible (included)