Sierra DCR1-CS1 Manuale utente

Installation Manual

Sierra Safety Technology, Inc.

(775) 782-7946 www.SierraSafety.com

DCR1-CS1

DCR1-CT1

FLAME DETECTOR MODELS

Installation Manual

Sierra Safety Technology, Inc.

(775) 782-7946 www.SierraSafety.com

DCR1-CS1 & DCR1-CT1

Flame Detector Models

APPLICABILITY & EFFECTIVITY

This manual provides information for the follow products:

Model Highlights

DCR1-CS1:N.O. or N.C. Fire and Fault Relays. Latching Controls.

DCR1-CT1: N.O. or N.C. Fire and Fault Relays. Latching Controls. Sensor Self-Test.

N.O. = Normally Opened Contacts N.C. = Normally Closed Contacts (If N.O. or N.C. is not specified, then both options are included.)

This manual is effective for the above models as of November 1, 2019

Document Name: D025G1

Revision: 1.0

3260 5007142 EN 50130-4:2011 EN 60529

Table of Contents

1 PRODUCT DESCRIPTION ..................................................................................................... 1

1.1 Introduction.................................................................................................................. 1

1.2 Configuration ............................................................................................................... 1

1.3 Scope .......................................................................................................................... 1

1.4 Description................................................................................................................... 1

1.5 Fault Diagnostics ......................................................................................................... 2

2 OPERATION........................................................................................................................... 2

2.1 General........................................................................................................................ 2

2.2 Field-of-View................................................................................................................ 2

2.3 Range .......................................................................................................................... 3

2.4 Environment................................................................................................................. 3

2.5 Configuration Settings.................................................................................................. 3

2.6 LED Operation, Detector Modes & FireScape™ Function............................................ 3

2.7 Outputs........................................................................................................................ 5

3 INSTALLATION ...................................................................................................................... 6

3.1 General Precautions .................................................................................................... 6

3.2 Housing ....................................................................................................................... 6

3.3 Wiring Connections...................................................................................................... 6

3.4 Testing......................................................................................................................... 8

4 MAINTENANCE...................................................................................................................... 9

4.1 Lens Cleaning.............................................................................................................. 9

5 TROUBLESHOOTING ...........................................................................................................10

5.1 No LED blink or erratic LED blink................................................................................10

5.2 Detector Indicates Fault ..............................................................................................10

5.3 Detector Goes into Alarm but No Fire Appears to be Present .....................................11

5.4 Detector Appears to Operate Normally but Will Not Alarm to a Fire or Test Source ....11

6 SPECIFICATIONS .................................................................................................................12

7 APPENDIX A – FIGURES......................................................................................................13

8 APPENDIX B - TABLES.........................................................................................................15

Installation Manual

DCR1-C Flame Detector Models (11/2019) Page: 1

1 PRODUCT DESCRIPTION

1.1 Introduction

DCR1-C flame detectors are Factory Mutual 3260 approved short-range detectors that use a

multiple spectrum sensor array (see FIGURE 7-2) to sense temperature, ultraviolet (UV) and

infrared (IR) energy. The internal microprocessor, using state-of-the-art fire algorithms, evaluates

these sensor inputs with flame signature analysis. This is performed by algorithms which evaluate

spectrum signatures to detect most hydrocarbon fires, as well as other fuel types (i.e. Silane,

Hydrogen, Heptane, IPA and MEK.) These signatures correlate the intensity values, change of

intensity values, relationship of intensity values, and frequency distribution of the sensor inputs.

Many common false sources (spurious energy emissions) are filtered out by these algorithms.

Providing continuous and reliable flame detection, the DCR1-C declares an alarm event when the

conditions of a fire algorithm are met. The DCR1 series of detectors provide superior resistant to

most acids and solvents, including, but not limited to: Hydrofluoric; Sulfuric; Nitric; Phosphoric;

Hydrochloric Acids; Piranha-Etch; De-Ionized Water; Ozone; Ammonium Hydroxide; Isopropyl

Alcohol; Chromium Phosphate; and, Organic Solvent Base Photo-Resist Strips.

1.2 Configuration

For the detectors listed in Table 1-1 Model Configurations, both the Fire and Fault Relays can

be connected as either normally open (N.O.) or normally closed (N.C.) operation using the flying

pigtail leads coming from the detector. N.C. and N.O. refers to the relay’s configuration during

normal operation.

Table 1-1 Model Configurations

Model

Fire Relay

Fault Relay

Sensor Self-Test

DCR1-CS1

N.O. or N.C.

DCR1-CT1

N.O. or N.C.

Yes

Note: Per NFPA 72 integrity requirements, a Normally Opened fire relay with supervision must be

used when a flame detector is connected to a fire alarm panel initiating device circuit.

1.3 Scope

Unless otherwise specified in this document, the words “detector(s),” “flame detector(s),”

“device(s)”, “DCR1” and/or “DCR1-C” all refer collectively to the various models listed in

Table 1-1 Model Configurations.Devices may also be referred to by only their extension with

the “DCR1” name excluded, for example “-CS1” instead of “DCR1-CS1.”

1.4 Description

All DCR1 detectors specified in this manual are calibrated to respond to a 4-inch Isopropyl

Alcohol (IPA) fire at 12 feet on axis within 3 seconds and have a clear 120° Conical Field-of-View.

All DCR1 electronics are factory sealed inside a housing made of polypropylene, which meets UL

94 Flammability Rating V0 (FRPP). In addition, sapphire windows and FEP jacketed cabling are

used to ensure the greatest chemical compatibility and to allow control panels and other fire

protection systems that are compatible with Dry “form C” contacts to be easily connected.

Designed and tested to comply with the EN 60529 IP67 standard, the DCR1 provides protection

Installation Manual

Page: 2DCR1-C Flame Detector Models (11/2019)

against a wide variety of acids and solvents, thereby making it an excellent choice for use in

semiconductor manufacturing tools and interior spaces of production and cleaning equipment.

In addition, all models of the DCR1 are approved for installation in Class 1 Division 2 Groups A,

B, C, D T4 hazardous locations, such as gas cabinets.

DCR1-CT1 detectors incorporate a UV Self-Test, which tests the integrity of the UV Sensor. A

fault is generated when a compromise has been detected.

Using a factory approved interface box and software a trained technician can retrieve the pre-fire

spectral data (FireScape™.) This data is recorded when the detector enters Fire Mode. The Fire

Relay can be programmed for either latching or non-latching operation. When non-latching

operation is chosen, the amount of time the detector waits before unlatching can be modified to

meet specific application needs. In Latching Mode, it is important to note that a FireScape™

cannot be overwritten until a detector is power cycled. In Non-latching Mode FireScape™ data

will be overwritten if another fire event occurs after the device returns to Normal Mode.

1.5 Fault Diagnostics

The microprocessor in the DCR1 series of detectors looks for fault conditions that could impair

the detector’s ability to accurately detect a flame and declare an alarm. By continuously

monitoring many of the detector’s key metrics and systems (i.e. input voltage, sensor circuits,

relay circuits, internal temperature, defined calibration constants, etc.) the DCR1 can detect the

occurrence of fault conditions.

2 OPERATION

2.1 General

When power is applied to a detector, it begins by checking and displaying both the model and

latching configurations. Next, the detector is initialized, and a series of self-tests are performed to

ensure the detector is functioning properly. Upon successful completion of Power Up Mode, the

DCR1 will go into Normal Mode (which means it is ready to detect a fire.)

2.2 Field-of-View

DCR1 detectors have a 120° Field-of-View. In order to

declare an alarm, a detector must be able to “see” a fire.

Any obstruction between the detector and the threat area

will impair the detector’s ability to cover the threat area

effectively. An obstruction is considered as anything that is

not transparent to the energy being detected.

Note:A DCR1’s sensors are not able to detect the spectral energy produced by a fire through

most types of glass or plastic. This may include glass or plastic that is visually transparent.

To provide coverage to a large area, multiple detectors should be used with overlapping Field-of-

Views (FOV.) Flame detectors should not normally be located so that they are looking down as

the products of combustion may stratify in the enclosed volume. Such stratification may severely

impact the detector's ability to respond to a fire.

Figure 2-1 Field-of-View

Installation Manual

DCR1-C Flame Detector Models (11/2019) Page: 3

2.3 Range

The range of the DCR1 is a function of the degree of obstruction, presence of spurious energy

sources, type of fire, position of the fire, fire size and rate of fire growth. As illustrated in

Figure 2-1, the response is affected by the angle at which the fire is located from the face of the

detector. For example, a 1 square foot Heptane fire on axis can be detected at 40 feet, whereas

the same fire located 60° off axis will be detected at approximately 20 feet. The type of materials

that constitute the threat will also affect the detector’s range. Different materials and

environmental conditions produce different amounts of the radiant energy, which is used by the

detector to “see” the fire.

2.4 Environment

Optical flame detectors sense radiant energy at some frequency or frequencies within their Field-

of-View. Any source that radiates energy at the same frequency or frequencies used by the

detector to sense a fire may impact the detector’s ability to “see” the fire. The DCR1 uses a UV

sensor (180 – 260 nm) and an IR sensor (0.715 to 3.5 microns.) Care should be taken to

minimize radiant energy sources within the detector’s Field-of-View. Because of the variety of

environments and conditions, a qualified P.E. may need to be consulted before deciding on the

location of the devices.

2.5 Configuration Settings

The DCR1-C is capable of being configured for either latching or non-latching operation using a

factory approved interface box and GoSierra™ computer software.

2.5.1 Latching Controls

DCR1-C devices allow for the detector’s fire relay to be set for either latching (factory

default) or non-latching operation.

In Latching Mode, the detector and its outputs will remain in the triggered state after

entering Fire Mode and stay that way until the detector is reset by cycling power. The

FireScape™ data for the fire event is stored in the detector’s non-volatile memory and

cannot be overwritten until the detector is power cycled.

In Non-latching Mode, the detector and its outputs will reset after 5 seconds (factory

default) of a flame no longer being detected and the detector will return to Normal Mode.

It is important to note that the non-latching time delay is programable should it be

required. Because a non-latching DCR1 returns to Normal Mode, the FireScape™ data

stored from a fire event will be overwritten should the device return to Fire Mode.

2.6 LED Operation, Detector Modes & FireScape™ Function

The status of a DCR1 can be determined from the two LEDs located on the face of the detector.

All DCR1 detectors have four standard modes: Power Up, Normal, Fault and Fire. The LEDs will

flash in specific patterns to indicate the detector’s status.

Installation Manual

Page: 4DCR1-C Flame Detector Models (11/2019)

2.6.1 Power Up Mode (Detector Reset)

When power is applied or recycled to a DCR1

detector, it enters Power Up Mode. Upon entering

Power Up Mode, all internal flags and triggers are re-

initialized and self-tests are initiated to ensure the

proper operation of the detector’s systems. In

addition, both red LEDs will begin flashing 2

sequential patterns, thereby providing a quick visual

representation of the model type and latching

configuration.

The first flash pattern indicates the model type. LED 1 will illuminate while LED 2 flashes

one time to identify that it is a DCR1-CS1 device. For -CT1 detectors, LED 2 will flash

two times rather than one time. Once complete, both LEDs will turn off.

The second flash pattern indicates whether a device is configured for latching or non-

latching Fire Relay operation. Again, LED 1 will illuminate, followed by LED 2 flashing

once to indicate the device is set to latching and twice to indicate non-latching. Once

complete, both LEDs will turn off.

When Power Up Mode has successfully completed, the DCR1 should go into Normal

Mode to indicate that the detector is ready to detect a fire.

2.6.2 Normal Mode

In Normal Mode, both LEDs will simultaneously flash briefly every 8 seconds. When a

detector is in Normal Mode it is constantly monitoring the environment and ready to

detect a fire. If a detector goes into a different mode, the appropriate output is triggered

and the “flash every 8 seconds” LED indication is suspended until the detector returns to

Normal Mode.

2.6.3 Fire Mode

When a DCR1 declares a fire, the Fire Relay energizes and both red LEDs on the face

of the detector (see Figure 2-2) come on and stay lit.

If the device was programmed (factory default) for latching operation, and a fire is

declared, the detector will remain in Fire Mode until the detector is reset by cycling

power.

For non-latching detectors, once the fire falls below the acceptable threshold, the

detector will return to Normal Mode after a period without reinitiating Power Up Mode

(factory default is 5 seconds.) It is important to note that once a non-latching device

returns to Normal Mode, the FireScape™ data stored in the detector’s memory will be

overwritten upon any subsequent fire event.

2.6.4 Fault Mode

When powered on, the DCR1 continuously monitors several of its internal systems to

ensure proper functionality is maintained. When a fault is detected, the device enters

Fault Mode and de-energizes the Fault Relay. The two LEDs on the face of the detector

(see Figure 2-2) provide a visual indication to help identify the type of fault being

reported (see TROUBLESHOOTING.) Only the highest numbered fault is indicated by

Figure 2-2 LEDs

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