Protectowire 2000 FireSystem Manual de usuario descargar pdf (Pagina 5)

alarm signals once each of its rated activation

temperatures are reached. The Detector con-

sists of a durable vinyl outer jacket similiar to

Type EPC.

XCR - Type XCR utilizes a high performance

fluoropolymer jacket. This detector is specifi-

cally designed for use in applications where

extreme environmental and product perfor-

mance criteria must be met. In general, the

flame retardant, low smoke XCR jacket pro-

vides excellent abrasion resistance and

mechanical properties over a broad range of

temperatures. It provides excellent chemical

and permeation resistance to a wide variety of

acids, bases, and organic solvents as well as

simple gases. In addition, the jacket exhibits

very little change in tensile properties upon

outdoor exposure to sunlight and weather.

XLT - Protectowire Type XLT is a unique

detector that has been designed for use in

cold storage facilities and other applications

that require a low alarm activation tempera-

ture. The outer jacket is a proprietary flame

retardant polymer that provides low moisture

absorption, good chemical resistance and

excellent low temperature performance. This

detector has been UL and FM tested to –60°F

(–51°C).

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At the rated operating temperature, the

Detector’s heat sensitive polymer insulation

yields to the pressure upon it, permitting the

inner conductors to move into contact with

each other. This action takes place at the first

heated point anywhere along the Detector’s

length. It does not require that any specified

length be heated in order to initiate an alarm.

Protectowire is a fixed temperature sensor

and is therefore capable of initiating an alarm

at any point along its length, once the rated

actuation temperature is reached.

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Since Protectowire has been approved as a

heat actuated automatic fire detector, it is

intended to be used on a supervised initiating

circuit of an approved fire protective signaling

control unit. The Detector must be installed

in continuous runs without taps or branches

in accordance with applicable sections of

NFPA 70 National Electrical Code, NFPA 72

National Fire Alarm and Signaling Code or as

determined by the local authority having juris-

diction. Within the context of this manual, the

word “approved” is defined as that which is

“acceptable to the authority having jurisdic-

tion.” The authority having jurisdiction is

defined as “the organization, office or individ-

ual responsible for approving equipment, an

installation or a procedure.” [From NFPA 72]

Typically, an initiating device circuit will be

designated as Class A or B depending upon

the circuits’ ability to continue to transmit

alarm and trouble signals during single circuit

fault conditions defined as follows:

•

Circuits capable of transmitting an alarm sig-

nal during a single open or ground fault,

provided they do not occur simultaneously,

are designed as Class A. In terms of an actu-

al wiring configuration, this circuit typically

consists of a pair of wires running from the

control panel out through the hazard area,

and returning in a continuous loop back to

the control panel where they are terminated.

• Circuits not capable of transmitting an alarm

beyond the location of the open or ground

fault as specified above, are designated

Class B. Class B circuits generally do not

return to the control panel, but are termi-

nated by an end-of-line device remote from

the control panel.

In addition to the class designations

described above, initiating device circuits may

also be designated by Style. The Style desig-

nation is determined by the capability of the

circuit to transmit alarm and trouble signals

during specified multiple circuit fault condi-

tions, in addition to the single circuit fault

conditions designated by the circuits’ class.

For further details and a complete description

of the performance capabilities of various ini-

tiating device circuits, please refer to NFPA 72.

Regardless of the Class or Style of the initiat-

ing device circuits specified, the basic wiring

practices for the installation of Protectowire in

each circuit remain the same. In general, the

use of Protectowire in any initiating device cir-

cuit (zone), is limited to coverage of a specif-

ic hazard or area requiring protection.

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Protectowire 2000 FireSystem Manual de usuario Pagina 5

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