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DN-5517:B1 • 7/13/11 — Page 1 of 4

30-2056B

Infrared Flame Detector

Conventional Initiating Devices

DN-5517:B1 • I-208

General

The Pyrotector Model 30-2056B IR Flame Detector is a

compact, unitized package containing an IR detection cell,

solid state electronics and dry Form-C (SPDT) contacts for

alarm and fault conditions. The detector is engineered to

respond to the nominal 4.45 micron band of infrared radia-

tion, which is commonly known as the CO

2 spike. See Figure

1. A characteristic of burning hydrocarbons is the emission of

unusually high levels of IR radiation in this narrow portion of

the radiation spectrum. On the other hand, extraneous light

sources that are capable of triggering an alarm in other types

of fire detectors emit very low levels of radiation in this range.

By concentrating on this narrow band of the spectral range

that is highly specific to burning hydrocarbons, combined

with the use of optical filters to discriminate against most

extraneous background radiation from a variety of sources,

including hot objects, the Model 30-2056B is able to provide

a high level of reliable fire detection, while being relatively

immune to false alarm signals.

The detector is compatible with most 24-volt filtered DC four-

wire fire alarm control panels.

Features

• High immunity to false alarms caused by lightning, arc

welding, x-rays and sunlight.

• Compatible with standard alarm systems.

• Remote test feature assures reliable response.

• Explosion-proof and watertight housing for use in a variety

of applications.

Application

The Pyrotector Model 30-2056B Infrared Flame Detector is

designed for use in applications where the occurrence of

lightning or arc welding within the protected area can cause

an ultraviolet fire detector to register a false alarm. The

detector is virtually immune to actuation caused by lightning,

arc welding, and most other extraneous light sources. It is

ideally suited for use in a variety of both indoor and outdoor

applications, in nearly any ambient lighting environment,

including the full range of artificial lighting. The housing is

explosion-proof, watertight, and dust-tight, and conforms to

applicable NEMA and NEC requirements. Typical applica-

tions that can use the 30-2056B flame detector include:

• Hydrocarbon processing plants.

• Hazardous storage facilities.

• Offshore oil platforms.

• Airport facilities.

• Fuel loading racks.

DETECTOR RESPONSE TIME

The response time of the detector depends on the size of the

fire, the rate of propagation, fire type, and the proximity of the

fire to the detector. The average response time to a one

square foot gasoline fire at 50 feet is less than 6 seconds.

REMOTE TESTING

The detector has a remote test feature that allows the opera-

tor to test the detection circuitry for proper function and also

check the optical integrity of the lens from a location that is

remote from the detector installation. To initiate a test, the

operator places the system in bypass and simply presses a

5517ph1.tif

5517f1b.tif

Spectral Sensitivity Range for Hydrocarbon Fires

Figure 1

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Inhaltsverzeichnis

Seite 1 - 30-2056B

DN-5517:B1 • 7/13/11 — Page 1 of 430-2056BInfrared Flame Detector Conventional Initiating DevicesDN-5517:B1 • I-208GeneralThe Pyrotector Model 30-205

Seite 2 - Specifications

Page 2 of 4 — DN-5517:B1 • 7/13/11test switch, usually located at the control panel. This actuatesan integral IR radiation source that is mounted insi

Seite 3 - Installation

DN-5517:B1 • 7/13/11 — Page 3 of 4MaintenanceTo assure maximum detector sensitivity, the lens must bekept free of dirt or other contaminating film.The

Seite 4

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