Issue No. 8113 Ver1.0-2015
Fire Alarm System Limitations
While a fire alarm system may lower insurance
rates, it is not a substitute for fire insurance!
An automatic fire alarm system–typically made up of
smoke detectors, heat detectors, manual pull stations,
audible warning devices, and a fire alarm control with
remote notification capability–can provide early warning
of a developing fire.
Such a system, however, does not assure protection
against property damage or loss of life resulting from a
fire.
The Manufacturer recommends that smoke and/or heat
detectors be located throughout a protected premise
following the recommendations of the current edition of
the National Fire Protection Association Standard 72
(NFPA 72), manufacturer's recommendations, State and
local codes, and the recommendations contained in the
Guide for Proper Use of System Smoke Detectors, which
is made available at no charge to all installing dealers. A
study by the Federal Emergency Management Agency
(an agency of the United States government) indicated
that smoke detectors may not go off in as many as 35%
of all fires. While fire alarm systems are designed to
provide early warning against fire, they do not guarantee
warning or protection against fire. A fire alarm system
may not provide timely or adequate warning, or simply
may not function, for a variety of reasons:
Smoke detectors
may not sense fire where smoke
cannot reach the detectors such as in chimneys, in or
behind walls, on roofs, or on the other side of closed
doors. Smoke detectors also may not sense a fire on
another level or floor of a building. A second-floor
detector, for example, may not sense a first-floor or
basement fire.
Particles of combustion or "smoke"
from a developing
fire may not reach the sensing chambers of smoke
detectors be- cause:
Barriers such as closed or partially closed doors,
walls, or chimneys may inhibit particle or smoke flow.
Smoke particles may become "cold," stratify, and not
reach the ceiling or upper walls where detectors are
located.
Smoke particles may be blown away from detectors
by air outlets.
Smoke particles may be drawn into air returns before
reaching the detector.
The amount of "smoke" present may be insufficient to
alarm smoke detectors. Smoke detectors are designed
to alarm at various levels of smoke density. If such
density levels are not created by a developing fire at the
location of detectors, the detectors will not go into alarm.
Smoke detectors, even when working properly, have
sensing limitations. Detectors that have photo electronic
sensing chambers tend to detect smoldering fires better
than flaming fires, which have little visible smoke.
Detectors that have ionizing-type sensing chambers tend
to detect fast-flaming fires better than smoldering fires.
Because fires develop in different ways and are often
unpredictable in their growth, neither type of detector is
necessarily best and a given type of detector may not
provide adequate warning of a fire.
Smoke detectors cannot be expected to provide
adequate warning of fires caused by arson, children
playing with matches (especially in bedrooms), smoking
in bed, and violent explosions (caused by escaping gas,
improper storage of flammable materials, etc.).
Heat detectors do not sense particles of combustion and
alarm only when heat on their sensors increases at a
predetermined rate or reaches a predetermined level.
Rate-of-rise heat detectors may be subject to reduced
sensitivity over time. For this reason, the rate-of-rise
feature of each detector should be tested at least once
per year by a qualified fire protection specialist. Heat
detectors are designed to protect property, not life.
IMPORTANT!
Smoke detectors
must be installed in the
same room as the control panel and in rooms used by the
system for the connection of alarm transmission wiring,
communications, signaling, and/or power. If detectors are
not so located, a developing fire may damage the alarm
Summary of Contents for HP101U
Page 6: ...Notes ...
Page 8: ...APPENDIX A BATTERY CALCULATIONS 27 APPENDIX B WIRE REQUIREMENTS 29 ...
Page 9: ...Main Circuit Board PANEL Terminals and Connectors Page 9 of 36 ...
Page 11: ...Page 11 of 36 ...
Page 12: ...The functions of terminal Page 12 of 36 ...
Page 13: ...Page 13 of 36 ...
Page 16: ...Page 16 of 36 ...
Page 17: ...FIGURE 1 3 2 PANEL 8 LEDs and Keypad Page 17 of 36 ...
Page 18: ...FIGURE 1 3 3 PANEL 16 LEDs and Keypad Page 18 of 36 ...
Page 24: ...Page 24 of 36 ...