ADEMCO Symphony 8142 Setup Guide download pdf (Page 105)

9-1

SECTION 9

Limitations and Warranty

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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, 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, they may not activate or provide early

warning for a variety of reasons in as many as 35% of all fires. 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.

Finally, 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 on the nature of the fire and/or location 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 the protected area approaches the temperature range of 32° to 40°C, the

detection performance can decrease.

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ADEMCO Symphony 8142 Setup Guide Page 105