ADEMCO Vista User Manual download pdf (Page 42)

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WARNING! THE LIMITATIONS OF THIS ALARM SYSTEM

While this system is an advanced design security system, it does not offer guaranteed protection against burglary or fire or other

emergency. Any alarm system, whether commercial or residential, is subject to compromise or failure to warn for a variety of reasons.

For example:

• Intruders may gain access through unprotected openings or have the technical sophistication to bypass an alarm sensor or

disconnect an alarm warning device.

• Intrusion detectors (e.g. passive infrared detectors), smoke detectors, and many other sensing devices will not work without power.

Battery operated devices will not work without batteries, with dead batteries, or if the batteries are not put in properly. Devices

powered solely by AC will not work if their AC power supply is cut off for any reason, however briefly.

• Signals sent by wireless transmitters may be blocked or reflected by metal before they reach the alarm receiver. Even if the signal

path has been recently checked during a weekly test, blockage can occur if a metal object is moved into the path.

• A user may not be able to reach a panic or emergency button quickly enough.

• While smoke detectors have played a key role in reducing residential fire deaths in the United States, they may not activate or

provide early warning for a variety of reasons in as many as 35% of all fires, according to data published by the Federal Emergency

Management Agency. Some of the reasons smoke detectors used in conjunction with this System may not work are as follows.

Smoke detectors may have been improperly installed and positioned. Smoke detectors may not sense fires that start 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 of a residence or building. A second floor detector, for example, may not sense a first floor or

basement fire. Moreover, smoke detectors have sensing limitations. No smoke detector can sense every kind of fire every time. In

general, detectors may not always warn about fires caused by carelessness and safety hazards like smoking in bed, violent

explosions, escaping gas, improper storage of flammable materials, overloaded electrical circuits, children playing with matches, or

arson. Depending upon the nature of the fire and/or the locations of the smoke detectors, the detector, even if it operates as

anticipated, may not provide sufficient warning to allow all occupants to escape in time to prevent injury or death.

• Passive Infrared Motion Detectors can only detect intrusion within the designed ranges as diagrammed in their installation manual.

Passive Infrared Detectors do not provide volumetric area protection. They do create multiple beams of protection, and intrusion can

only be detected in unobstructed areas covered by those beams. They cannot detect motion or intrusion that takes place behind

walls, ceilings, floors, closed doors, glass partitions, glass doors, or windows. Mechanical tampering, masking, painting or spraying

of any material on the mirrors, windows or any part of the optical system can reduce their detection ability. Passive Infrared

Detectors sense changes in temperature; however, as the ambient temperature of protected area approaches the temperature range

of 90° to 105°F (32° to 40°C), the detection performance can decrease.

• Alarm warning devices such as sirens, bells or horns may not alert people or wake up sleepers if they are located on the other side of

closed or partly open doors. If warning devices sound on a different level of the residence from the bedrooms, then they are less

likely to waken or alert people inside the bedrooms. Even persons who are awake may not hear the warning if the alarm is muffled

from a stereo, radio, air conditioner or other appliance, or by passing traffic. Finally, alarm warning devices, however loud, may not

warn hearing-impaired people or waken deep sleepers.

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ADEMCO Vista User Manual Page 42