System Sensor 1551B Plug-in Intelligent - Manual (Page 4)

D500-40-00 4 I56-1436-00
© System Sensor 1999
Three-Year Limited Warranty
System Sensor warrants its enclosed smoke detector to be free from de-
fects in materials and workmanship under normal use and service for a
period of three years from date of manufacture. System Sensor makes no
other express warranty for this smoke detector. No agent, representative,
dealer, or employee of the Company has the authority to increase or alter
the obligations or limitations of this Warranty. The Company’s obligation
of this Warranty shall be limited to the repair or replacement of any part of
the smoke detector which is found to be defective in materials or work-
manship under normal use and service during the three year period com-
mencing with the date of manufacture. After phoning System Sensor’s toll
free number 800-SENSOR2 (736-7672) for a Return Authorization number,
send defective units postage prepaid to: System Sensor, Repair Depart- ment, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please
include a note describing the malfunction and suspected cause of failure.
The Company shall not be obligated to repair or replace units which are
found to be defective because of damage, unreasonable use, modifica-
tions, or alterations occurring after the date of manufacture. In no case
shall the Company be liable for any consequential or incidental damages
for breach of this or any other Warranty, expressed or implied whatsoever,
even if the loss or damage is caused by the Company’s negligence or fault.
Some states do not allow the exclusion or limitation of incidental or conse-
quential damages, so the above limitation or exclusion may not apply to
you. This Warranty gives you specific legal rights, and you may also have
other rights which vary from state to state.
This smoke sensor is designed to activate and initiate emergency action,
but will do so only when it is used in conjunction with an authorized fire
alarm system. This sensor must be installed in accordance with NFPA
standard 72.
Smoke sensors will not work without power. AC or DC powered smoke
sensors will not work if the power supply is cut off.
Smoke sensors will not sense fires which start where smoke does not
reach the sensors. Smoldering fires typically do not generate a lot of heat
which is needed to drive the smoke up to the ceiling where the smoke sen-
sor is usually located. For this reason, there may be large delays in detect-
ing a smoldering fire with either an ionization type sensor or a
photoelectric type sensor. Either one of them may alarm only after flaming
has initiated which will generate the heat needed to drive the smoke to the
ceiling.
Smoke from fires in chimneys, in walls, on roofs or on the other side of a
closed door(s) may not reach the smoke sensor and alarm it. A sensor
cannot detect a fire developing on another level of a building quickly or at
all. For these reasons, sensors shall be located on every level and in ev-
ery bedroom within a building.
Smoke sensors have sensing limitations, too. Ionization sensors and
photoelectric sensors are required to pass fire tests of the flaming and
smoldering type. This is to ensure that both can detect a wide range of
types of fires. Ionization sensors offer a broad range of fire sensing capa-
bility but they are somewhat better at detecting fast flaming fires than
slow smoldering fires. Photoelectric sensors sense smoldering fires better
than flaming fires which have little, if any, visible smoke. Because fires de-
velop in different ways and are often unpredictable in their growth, nei-
ther type of sensor is always best, and a given sensor may not always
provide early warning of a specific type of fire.
In general, sensors cannot be expected to provide warnings for fires result-
ing from inadequate fire protection practices, violent explosions, escaping
gases which ignite, improper storage of flammable liquids like cleaning
solvents which ignite, other similar safety hazards, arson, smoking in bed,
children playing with matches or lighters, etc. Smoke sensors used in high
air velocity conditions may have a delay in alarm due to dilution of smoke
densities created by frequent and rapid air exchanges. Additionally, high
air velocity environments may create increased dust contamination, de-
manding more frequent maintenance.
Smoke sensors cannot last forever. Smoke sensors contain electronic
parts. Even though smoke sensors are made to last over 10 years, any part
can fail at any time. Therefore, smoke sensors shall be replaced after being
in service for 10 years. The smoke sensor system that this sensor is used in
must be tested regularly per NFPA 72. This smoke sensor should be
cleaned regularly per NFPA 72 or at least once a year.
WARNING
The Limitations of Property Protection Smoke Sensors