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Bosch D296 Application Manual

Projected-beam smoke detectors
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Download this manual See also: Instruction and Installation Manual
Projected-beam Smoke Detectors
D296/D297
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Application Guide

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Summary of Contents for Bosch D296

  • Page 1 Projected-beam Smoke Detectors D296/D297 Application Guide...

  • Page 3: Table Of Contents

    Environmental Considerations 3.3.1 Outdoor 3.3.2 Indoor 3.3.3 Mounting Location and Spacing Ceilings 3.5.1 Flat Ceilings 3.5.2 Sloped Ceilings 3.5.3 Peaked Ceilings 3.5.4 Long Ceilings Specifications Appendices Accessories Worksheets Glossary Bosch Security System, Inc. Application Guide 2013.02 | 02 | F.01U.500.951...

  • Page 4: Document Introduction

    – Where there are expansive ceilings. One set of D296/D297 detectors can replace up to 24 spot‑type detectors. This saves on service and installation costs, especially in areas such as large offices or department stores.

  • Page 5: Applications

    Generally, the D296/D297 detectors provide smoke detection in large areas with open or high ceilings. The D296/D297 detector’s coverage range is up to 350 ft (106 m). On a smooth flat ceiling, you can place the beams up to 60 ft (18 m) apart, allowing one set of detectors (transmitter and receiver ) to replace up to 24 spot‑type smoke detectors with 30 ft (9 m)

  • Page 6: Stratification

    3.3.1 Outdoor Do not use the D296/D297 detectors for outdoor applications. Environmental conditions such as temperature extremes, bright sunlight, rain, freezing rain, snow, sleet, fog and dew can interfere with the proper operation of the detector. Outdoor conditions also make smoke behavior impossible to predict.

  • Page 7: Indoor

    Notice! Avoid sources of heat and air movement. – Do not mount the D296/D297 detectors where hot or cold air can blow directly into the beam path. – Heating, ventilating, and air conditioning (HVAC) systems and ceiling fans can cause smoke to blow away from the projected beam.

  • Page 8: Location And Spacing

    Location and Spacing The D296/D297 detectors allow a range of 30 ft to 350 ft (9 m to 106 m) and spacing up to 60 ft (18.3 m). Space the detectors no more than 60 ft (18.3 m) between projected beams and no more than half the spacing between a projected beam and a sidewall .
  • Page 9 (8.5 m) before each beam pocket must be treated separately. Review Annex B‑2 Performance- Based Approach to Designing and Analyzing Fire Detection Systems in NFPA 72 to determine the potential fire size at the location. See the following figure: Bosch Security System, Inc. Application Guide 2013.02 | 02 | F.01U.500.951...

  • Page 10: Sloped Ceilings

    Figure 3.7: Sloped Ceilings 1 Slope 10° or less 3 Slope greater than 10° 2 3 ft (1 m) maximum 4 Detector at ½ S not required S Selected detector spacing 2013.02 | 02 | F.01U.500.951 Application Guide Bosch Security System, Inc.

  • Page 11: Peaked Ceilings

    . For example, the minimum spacing for a beam length of 300 ft (91.5 m) is 30 ft (9 m). See the following figure: Bosch Security System, Inc. Application Guide 2013.02 | 02 | F.01U.500.951...

  • Page 12: Specifications

    Receiver: 45 mA at 24 VDC; Transmitter: 20 mA at 24 VDC – D297: Receiver: 50 mA at 12 VDC; Transmitter: 20 mA at 12 VDC Voltage – D296: 18.0 VDC to 32.0 VDC 2013.02 | 02 | F.01U.500.951 Application Guide Bosch Security System, Inc.
  • Page 13 7 in. x 5.5 in. x 5.5 in. (17.8 cm x 13.9 cm x 13.9 cm) Mounting: Surface or ceiling mount on NEMA 4 in. square or octagonal electrical boxes or equivalent (not supplied) Pattern Pointability: Internally pointable; ±90° horizontal, ±10° vertical Bosch Security System, Inc. Application Guide 2013.02 | 02 | F.01U.500.951...

  • Page 14: Appendices

    Can be mounted on a standard double-gang box. D308 Field Test Kit Tests the calibration of the D296/D297 detectors by providing a calibrated amount of obscuration between the transmitter and receiver .
  • Page 15 Provides a visual indication to help align Strobe the D296/D297 transmitter and receiver . D1005 Test Cord Provides an electrical connection to the D296/D297 receiver to help align the receiver and transmitter . Bosch Security System, Inc. Application Guide 2013.02 | 02 | F.01U.500.951...

  • Page 16: Worksheets

    Air handling units such as HVAC – Support posts – Shelving – Peaks – Anything suspended from the ceiling that might interfere with the beam – Lights – Directions (north, south, and so on) 2013.02 | 02 | F.01U.500.951 Application Guide Bosch Security System, Inc.
  • Page 17 Document Introduction | en Ensure you include site features such as support beams, ceiling height, and peaks. Ensure you include site features such as support beams, ceiling height, and peaks. Bosch Security System, Inc. Application Guide 2013.02 | 02 | F.01U.500.951...

  • Page 18: Glossary

    The ability of a projected beam smoke detector to detector, and so on. respond to a given level of smoke. sidewall A wall parallel to the beam’s path of travel. 2013.02 | 02 | F.01U.500.951 Application Guide Bosch Security System, Inc.
  • Page 20 Bosch Security Systems, Inc. 130 Perinton Parkway Fairport, NY 14450 www.boschsecurity.com © Bosch Security Systems, Inc., 2013...

This manual is also suitable for:

D297

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