Rosemount Manual: UVU-140-A and UVU-140-AR Unitized UV Fire Detector | Rosemount Manuals & Guides

MODEL #: UVU-140-A & UVU-140-AR

UNITIZED ULTRAVIOLET FIRE

DETECTOR

REVISED: DECEMBER, 1999

REV. uvu140a-aroct99.wpd

WARRANTY POLICY

Net Safety Monitoring Inc. products are carefully designed and manufactured from high quality
components and can be expected to provide many years of trouble-free service. Each product is
thoroughly tested, inspected and burned-in prior to shipment. Failures can occur which are beyond the
control of the manufacturer. Failures can be minimized by adhering to the operating and maintenance
instructions herein. Where the absolute greatest reliability is required, redundancy should be designed
into the system.

Net Safety Monitoring Inc. warrants its sensors and detectors against defective parts and
workmanship for a period of 24 months from date of purchase and other electronic assemblies for 36
months from date of purchase.

No other warranties or liability, expressed or implied, will be honored by Net Safety Monitoring Inc.

Contact Net Safety Monitoring Inc. or the authorized distributor for details.

Table of Contents

Unit I - GENERAL INFORMATION

DESCRIPTION .......................................................................... 1

FEATURES ............................................................................. 1

DETECTOR SPECIFICATIONS .............................................................. 1

Figure 1 - Detector Dimensions ....................................................... 3

Figure 2 - Swivel Mount Dimensions .................................................... 3

Figure 3 - JB4 - UV - T Junction Box Side View ........................................... 3

Figure 4 - JB4-UV-T Junction Box Dimensions ............................................ 3

Unit II - UV FIRE DETECTION

SYSTEM APPLICATION ................................................................... 4

DETECTOR SENSITIVITY .................................................................. 4

SPECTRAL SENSITIVITY RANGE ..................................................... 4

Figure 5 - Various Spectral Distributions ................................................. 5

CONE OF VISION ................................................................. 6

Figure 6 - Detector Cone of Vision ..................................................... 6

SYSTEM SENSITIVITY .................................................................... 6

Table 1 - Detector Sensitivity Settings ................................................... 7

Table 2 - Alarm Response Delay Settings ................................................ 7

Figure 7 - Dip Switch Operation and Location ............................................. 7

Unit III - SYSTEM INSTALLATION

INSTALLATION .......................................................................... 7

GENERAL WIRING REQUIREMENTS .................................................. 7

CONNECTION DIAGRAM FOR UVU-140-A .............................................. 8

Figure 8 - Wiring for UVU-140-A ....................................................... 8

CONNECTION DIAGRAM FOR UVU-140-AR ............................................. 9

Figure 9 - Wiring for UVU-140-AR ..................................................... 9

Table 3 - Coil & Relay Settings Table ............................................... 9

POSITION AND DENSITY OF DETECTORS ................................................... 10

MOUNTING THE DETECTOR ....................................................... 10

Figure 10 - Detector with Swivel Mount Assembly ......................................... 10

Unit IV - SYSTEM OPERATION

STARTUP PROCEDURE ........................................................... 11

CHECKOUT PROCEDURE ......................................................... 11

AUTOMATIC vi TEST ............................................................. 11

MANUAL vi TEST PROCEDURE ..................................................... 11

MANUAL CHECK PROCEDURE ..................................................... 12

NORMAL OPERATION ................................................................... 12

FIRE RESPONSE ................................................................ 12

Table 4 - Current & Relay Output Conditions ............................................ 13

Unit V - MAINTENANCE

ROUTINE MAINTENANCE ......................................................... 13

TROUBLESHOOTING ............................................................ 14

CLEANING VIEWING WINDOW AND REFLECTOR ...................................... 14

REPOSITIONING vi ADJUSTMENT ALLEN SCREW ...................................... 14

DEVICE REPAIR AND RETURN ..................................................... 14

Appendix A

Net Safety Monitoring Inc. Electrostatic Sensitive Device Handling Procedure .............................I

Appendix B

Common Ultra-Violet Absorbing Gases ......................................................... II

Appendix C

Wire Resistance In Ohms .................................................................. III

Unit I

GENERAL INFORMATION

DESCRIPTION

The UVU-140-A & UVU-140-AR fire detectors provide fast, reliable flame detection in a wide variety of
applications. The automatic visual integrity (vi) feature allows for a continuous check of optical surfaces,
sensitivity and electronic circuitry of the unitized fire detector. Fire and fault identification are
accomplished by the use of specific current output levels and relay contacts (UVU-140-AR only).

The UVU-140-A & UVU-140-AR fire detectors respond to UV radiation over the range of 185 to 260
nanometres. They are not sensitive to direct or reflected sunlight nor to normal artificial lighting.

The UVU-140-A & UVU-140-AR fire detectors are housed in explosion-proof enclosures that are designed
to meet most national and international standards. They are available in anodized aluminum or optional
stainless steel.

The UVU-140-AR unitized fire controller connects to a JBR-T-ASSY which consists of a junction box, two
relays and a terminal connector board. The JBR-T-ASSY has large, easy access, spring tension terminals
and a user selectable dip switch which allows the operator to select relay and coil status conditions (see
Table 3).

The UVU-140-A & UVU-140-AR fire detectors are typically mounted with a swivel mounting assembly
(see Figure 9).

FEATURES

< Instantaneous response to ultraviolet radiation
< Automatic and manual visual integrity (vi) testing
< Adjustable sensitivity and time delay
< All automatic test functions are performed with the system on-line
< Alarm and automatic fault identification indicated by a 4 to 20mA output
< Relay outputs for fire and fault identification (UVU-140-AR only)
< The fault relay is normally energized and non-latching (UVU-140-AR only)

DETECTOR SPECIFICATIONS

< Operating Voltage Range:

24Vdc nominal: 10.5 to 32Vdc

<< Power Consumption (UVU-140-A):

1.92 Watts nominal 2.4 Watts maximum @ 24Vdc
80mA nominal 100mA maximum @ 24Vdc

< Power Consumption (UVU-140-AR):

2.4 Watts nominal (fault relay energized) @ 24Vdc

2.9 Watts maximum (fire & fault relays energized) @ 24Vdc
100mA nominal @ 24Vdc 120mA maximum @ 24Vdc

<< Temperature Range:

Operating: -40ºC to +85ºC (-40°F to +185°F)
Storage: -55ºC to +125ºC (-65°F to +257°F)

- 1 -

<< Dimensions:

Refer to Figures 1, 2, 3 and 4

< Detector Enclosure Materials:

NEMA 4X anodized copper-free aluminum or stainless steel (optional)

< Shipping Weight (approximate):

2 lbs (0.9 kilograms)

< Certification:

CSA, NRTL/C, NEMA 4X certified for hazardous locations
Class 1, Division 1, Groups B, C and D
IEC approval Ex d IIB+H2 T5 (Class 1, Zone 1, Groups IIB+H2 T5)

< Spectral Sensitivity Range:

The detectors respond to UV radiation over the range of 185 to 260 nanometres
(1850 to 2600 angstroms)

< Cone of Vision:

120 degree cone of vision when measured in accordance with NFPA 72 guidelines

< Current Outputs:

4-20mA DC into a maximum external loop resistance of 600 Ohms at 10.5 to 32Vdc

< Relay Contacts: (Available on UVU-140-AR only)

1A @ 30Vdc 0.5A @ 125Vac

<< Response Time:

Response to a saturating (high intensity) UV source is typically 10 milliseconds
Alarm response time is programmable

<< Time Delay Settings:

DIP switch selectable 3, 4, 5 or 7 seconds

< Sensitivity Settings:

DIP switch selectable 8, 16, 24 or 32 counts per second

< Humidity Range:

0 to 100% relative humidity

- 2 -

Figure 1 - Detector Dimensions

Figure 2 - Swivel
Mount Dimensions

Figure 3 -JB4-UV-T Junction Box Side View Figure 4 - JB4-UV-T Junction Box Dimensions

- 3 -