|
|
Statistics show us that
fires which occur in residential occupancies account for
approximately 71% of all structure fires and are
responsible for approximately 78% of all fire deaths.
During 1992, which proved to be one of the worst years
for fire related deaths in Utah, 32 people died as a
result of fire. Of those 32 individuals, 22 were killed
in home residential fires. Eight of those deaths were
children under the age of five years. Further analysis
of the 1992 data showed that not one of those home
structure fires had any kind of smoke detection
installed. For this reason, the we would like to share some information
relevant to the importance of installing and maintaining
smoke and heat detectors in your home.
Smoke and heat detectors are self-contained fire alarm
devices that consist of electrical components that
include a smoke sensing chamber, an alarm sounding
appliance, and are either battery operated or are
connected to a separate power supply source. There are
two types of smoke detectors - either ionization or
photoelectric. Some detectors combine both types of
sensors within the same unit. Tests have shown that
ionization detectors respond slightly faster to open
flaming fires while photoelectric detectors respond
faster to smoldering fires but both normally respond
within seconds of each other. Smoke detectors are fairly
inexpensive and can be purchased at any local hardware
or variety store. |
|
|
Ademco 5808LST Wireless Photoelectric Smoke & Heat Detector |
5809 ADEMCO Wireless Heat Detector |
7309 SMOKE & HEAT DETECTOR W-END-OF-LINE RELAY |
|
 |
|
| |
Installing
Smoke Detectors In Suspended Ceilings |
|
|
|
You can install your smoke detector
in suspended ceiling easily by using a user manual. Before
installing smoke detector in suspended ceiling, You must choose
your heat or smoke detector and you must learn the smoke and
heat detectors working method. You can find some related
writings at our site. The
heat detector employs two independent methods of detection
rate-of-rise and fixed temperature. The rate-of-rise method
detects fires that rapidly grow in intensity. This method
responds to abnormally fast temperature increases.
The fixed-temperature method detects fires that build
temperatures to a high level at a slow rate. This method
responds to a specific temperature setting.
A fixed head detector must be completely heated to alarm
temperature and therefore a disastrous lag in time may occur
with a fast rate fire. Rate-of-rise devices, on the other hand,
are triggered by the rate of increase in ambient temperature and
are subject to false alarms caused by harmless, transient
thermal gradients such as the rush of warm air from process
ovens.
The secret of the heat detection unit's sensitivity is in the
design. The outer shell is made of a rapidly expanding alloy
which closely follows changes in surrounding air temperature.
The inner struts are made of a lower expanding alloy. Designed
to resist thermal energy absorption and sealed inside the shell,
the struts follow temperature changes more slowly.
|
|
SMOKE AND
HEAT DETECTORS
