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Any fire alarm system may fail for a variety of reasons:
Smoke detectors may not sense fire where smoke cannot reach the detectors such as in chimneys, in walls, or 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. Furthermore, all types of smoke detec-
tors—both ionization and photoelectric types—have sensing limitations. No type of smoke detector can sense every kind
of fire caused by carelessness and safety hazards like smoking in bed, violent explosions, escaping gas, improper stor-
age of flammable materials, overloaded electrical circuits, children playing with matches or arson.
Audible warning devices such as bells may not alert people if these devices are located on the other side of closed or
partly open doors or are located on another floor of a building.
A fire alarm system will not operate without electrical power. If AC power fails, the system will operate from standby
batteries only for a specified time.
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.
Auxiliary equipment used in the system may not be technically compatible with the control panel. It is essential to use only
equipment listed for service with your control panel.
Telephone lines needed to transmit alarm signals from a premise to a central monitoring station may be out of service or
temporarily disabled.
The most common cause of fire alarm malfunctions, however, is inadequate maintenance. All devices and system wiring
should be tested and maintained by professional fire alarm installers following written procedures supplied with each
device. System inspection and testing should be scheduled monthly or as required by national and/or local fire codes.
Adequate written records of all inspections should be kept.
GENERAL SAFETY NOTICES
Note:
The following must be observed to maintain personnel safety.
The following general safety notices supplement specific warnings and cautions appearing in the manual. The safety
precautions in this section must be understood and applied during operation and maintenance. This manual is to be used
by trained distributors/technicians. The entire manual should be read and fully understood prior to installation.
TEST EQUIPMENT
Make certain test equipment is in good operating condition. Do not touch live equipment or personnel working on live
equipment while holding a test meter. Some types of measuring devices should not be grounded; these devices should
not be held when taking measurements.
FIRST AID
Any injury, no matter how slight, should never go unattended. Always obtain first aid or medical attention immediately.
GENERAL PRECAUTIONS
The following general safety precautions are to be observed at all times:
1.
All electrical components associated with equipment shall be installed and grounded in accordance with NEC, NFPA
and local regulation requirements.
2.
Special precautionary measures are essential to prevent applying power to equipment at any time maintenance work
is in progress.
3.
Before working on electrical equipment, use a voltmeter to ensure that the system is not energized.
4.
When working near electricity, do not use metal rules, flashlights, metallic pencils or any other objects having exposed
conductive material.
5.
When connecting a meter to terminals for measurement, use range higher than expected voltage.
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