Introduction; Special Considerations For Smoke Detectors And Sensors; Smoke Detector/Sensor Applications - Simplex 4098 Applications Manual

INTRODUCTION

Special Considerations for
Smoke Detectors and Sensors
Smoke Detector/Sensor
Applications
The purpose of this publication is to provide information concerning the proper
application of both heat and smoke detectors and sensors in conjunction with fire
alarm systems.
The information in this publication is intended to be used only as a technical
guide. The requirements of applicable codes and standards, as well as directives
of Authorities Having Jurisdiction (AHJs), should be followed.
Before installing detectors/sensors, make a survey of the area to be covered in
accordance with information provided in NFPA 72, Chapter 5 (an excerpt of
which is provided below). For specific applications, refer to Simplex
publication Common Code Requirements For Fire Alarm Systems (Publication
No. FA2-91-010). For additional information, refer to NFPA 72 and the NEMA
Guide for Proper Use of System Smoke Detectors.
Refer to each individual section shown in the Table of Contents for information
on specific products.
•
Is there human occupancy?
•
Contents to be protected.
•
Type of construction and use.
•
Burning characteristics of contents.
•
Air movement - stratification.
•
Deflections and obstructions.
•
Height of ceilings.
•
Surface conditions of ceilings.
•
Type of ceiling construction.
•
Total area.
•
Vent locations - velocities - dilution.
Each detector/sensor is capable of providing up to 900 square feet (84 square
meters) of coverage, depending on:
1. Requirements of local codes.
2. Results of engineering evaluation.
3. Physical characteristics of protected area. For examples refer to the
following paragraphs of NFPA 72, National Fire Alarm Code 1999:
•
5-2.4.3 Beam Construction (for heat detector/sensors)
•
5-3.4.6.1 Flat Ceilings and 5-3.4.6.2 Sloped Ceilings
•
A-5-3.4.6
1
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