Simplex 4098 Applications Manual page 13

WHERE NOT TO PLACE DETECTORS/SENSORS, Continued
DO NOT PLACE DETECTORS/SENSORS:
•
In very cold or very hot environments, or in unheated buildings or rooms
where the temperature can fall below or exceed the operating temperature
range of the detector/sensor. At temperatures below 32° F (0° C), ice
crystals or condensation can appear inside the sensing chamber and make it
overly sensitive or cause a nuisance alarm. At temperatures above the
operating range of the detector/sensor, greater than 120° F (49° C), its
internal components may not function properly.
•
In or near areas where combustion particles are normally present, such as in
kitchens or other areas with ovens and burners; in garages, where particles
of combustion are present in vehicle exhausts; within 15 feet (4.5 meters) of
any type of furnace, hot water heater, or gas space heater; or in welding
shops or other types of work areas where some form of combustion is used
in the activity normally conducted in that area. When a detector must be
located in or adjacent to such an area, a fixed temperature heat detector may
be appropriate.
•
In air streams passing by or through kitchens. Air often enters a residence
or a residential unit of an apartment building through cracks around the front
and/or back doors. If the air return is in the bedroom hallway or in the
bathroom, and if air from the kitchen easily enters the air stream going from
the door to the air return, combustion particles from cooking can cause
nuisance alarms. Install detectors/sensors so that they protect the bedrooms,
but so they are out of the air stream.
•
In or near manufacturing areas, battery rooms, or other areas where
substantial quantities of vapors, gases or fumes may be present. Strong
vapors, like excessive humidity, can make detectors/sensors overly sensitive
or less sensitive than normal. In very large concentrations, gases heavier
than air, such as carbon dioxide, may make detectors/sensors more sensitive,
while gases lighter than air, such as helium, may make them less sensitive.
Aerosol particles may collect on detector/sensor chamber surfaces and cause
nuisance alarms.
•
Insect-infested areas. If insects enter a detector/sensor's sensing chamber,
they can cause a nuisance alarm. Take proper insect eradication procedures
before installing detectors/sensors in such locations. If spraying is done, do
not allow insect spray to enter the detectors/sensors.
•
Near fluorescent light fixtures. Electrical noise generated by fluorescent
light fixtures may cause nuisance alarms. Install detectors/sensors at least
1 foot (0.3 meters) away from such light fixtures.
7
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