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The smoke alarm has a recommended service life of at least 10 years under normal conditions.
The smoke alarm uses an extremely small amount of a radioactive element in the ionization
chamber. Do not tamper with radioactive sealed source or try to repair the smoke alarm
yourself. Refer to instructions for repairs.
MODEL USI-5204
(Part #USI-5204HA)
COMMERCIAL RESIDENTIAL (UTHA)
SMOKE & FIRE ALARM WITH SILENCE CONTROL
SMOKE ALARM LIMITATIONS AND FUNCTIONS
• THERE ARE TWO BASIC SMOKE ALARM TYPES - IONIZATION AND PHOTOELECTRIC.
Ionization smoke alarms are your best overall choice for reliability and fast response time,
since they quickly sense small "invisible" smoke particles and will also sense larger "visible"
smoke particles. Photoelectric smoke alarms may respond more quickly in certain types of
fires, for example - slow smoldering fires with large "visible" smoke particles. ALL TYPES OF
SMOKE ALARMS HAVE LIMITATIONS. NO TYPE OF SMOKE ALARM CAN SENSE EVERY
KIND OF FIRE OR SMOKE EVERY TIME.
• WARNING - SMOKE ALARMS WILL NOT WORK DURING A LOSS OF POWER. SINCE A SMOKE
ALARM WILL NOT WORK WITHOUT POWER, having an alarm(s) that works from two completely
different power sources, such as an AC direct wire with battery backup smoke alarm, can give you an
extra measure of protection in case of an AC power failure or a dead battery.
• USING A SMOKE ALARM IN A SMOKY AREA LIKE A KITCHEN, OR IN A HIGH HUMIDITY
AREA NEAR A SHOWER, CAN CAUSE FALSE ALARMS. DO NOT TURN OFF THE AC
POWER TO QUIET THE ALARM. A SMOKE ALARM WILL NOT HELP PROTECT YOU IF IT
IS NOT POWERED. Properly locate your alarm to avoid nuisance alarms.
• A SMOKE ALARM MAY NOT ALWAYS WARN YOU 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, NATURAL CAUSES SUCH AS LIGHTNING, OR ARSON.
FIRE PREVENTION IS YOUR BEST SAFEGUARD.
• INSTALLING SMOKE ALARMS MAY MAKE YOU ELIGIBLE FOR LOWER INSURANCE
RATES, but SMOKE ALARMS ARE NOT A SUBSTITUTE FOR INSURANCE. Homeowners
and renters alike should continue to insure their lives and properties.
• SMOKE ALARMS CANNOT WORK WITHOUT POWER. Battery operated units cannot work if the
batteries are missing, disconnected or dead, if the wrong type of batteries are used or if the batteries
are not installed correctly. AC (only) powered units cannot work if the AC power is cut off for any
reason. If you are concerned about the limitations of battery or AC power, install both types of units.
• SMOKE ALARMS CANNOT DETECT FIRES IF THE SMOKE DOES NOT REACH THEM.
Smoke from fires may not reach the sensing chamber and set off the alarm. One unit should
be installed inside each bedroom or sleeping area.
• SMOKE ALARMS MAY NOT DETECT FIRE ON ANOTHER FLOOR OR AREA OF THE
HOME. Recommended minimum protection is at least one unit in every sleeping area and
every bedroom on every level of your home. Interconnected units may provide earlier warning
than stand-alone units since all units alarm when one detects smoke.
• SMOKE ALARMS MAY NOT BE HEARD. The alarm horn in this unit meets or exceeds current
standards, but it may not be heard if: (1) the unit is located outside a closed or partially closed
door; (2) residents recently consumed alcohol or drugs; (3) the alarm is drowned out by noise
from stereos, TV's, air conditioners or other appliances or (4) if residents are hearing impaired
or sound sleepers.
• SMOKE ALARMS ARE NOT FOOLPROOF. You must test the unit
weekly to ensure your
continued protection. Smoke alarms cannot prevent or extinguish fires.
• SMOKE ALARMS HAVE A LIMITED LIFE. The unit should be replaced immediately if it is not
operating properly. You should always replace a smoke alarm after 10 years.
• SMOKE ALARMS ARE NOT TO BE USED WITH DETECTOR GUARDS UNLESS THE
COMBINATION HAS BEEN EVALUATED AND FOUND SUITABLE FOR THAT PURPOSE.
• CURRENT STUDIES HAVE SHOWN SMOKE ALARMS MAY NOT AWAKEN ALL SLEEPING
INDIVIDUALS AND THAT IT IS THE RESPONSIBILITY OF INDIVIDUALS IN THE
HOUSEHOLD WHO ARE CAPABLE OF ASSISTING OTHERS TO PROVIDE ASSISTANCE
TO THOSE WHO MAY NOT BE AWAKENED BY THE ALARM SOUND OR TO THOSE
WHO MAY BE INCAPABLE OF SAFELY EVACUATING THE AREA UNASSISTED.
USI-5204
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