2451
SYSTEM SENSOR
PHOTOELECTRONIC
SMOKE DETECTOR
DESCRIPTION
The System Sensor 2451 Series photoelectronic smoke de-
tectors are specifically designed to meet the performance re-
quirements of fire detection/alarm systems. The 2451 and
2451T detectors use state-of-the-art optical sensing cham-
bers and are designed so that LED failure will not cause an
alarm. The detectors are designed to provide open area detec-
tion and when installed in a two-wire base are compatible
with FCI fire alarm control panels. The detectors operation
and sensitivity can be tested in place. The Model 2451T unit
has the same specifications as the Model 2451, but also fea-
tures a built-in fixed temperature (135
o
F) thermal detection
unit.
The detectors are of plug-in construction and plug into the
same base as the 1451 series ionization smoke detectors,
making both models interchangeable. Bases are available for
two-wire, four-wire, and 120 VAC four-wire operation.
Two visible LEDs on each detector flash every ten seconds
indicating that power is being applied to the detector. The
LEDs light steadily when the detector is in alarm. A remote
LED annunciator is available as an optional accessory.
The 2451 is UL Listed for mounting inside ducts up to a ve-
locity of 3,000 FPM.
Sensitivity testing is performed either by applying a test
magnet or inserting a calibrated test card according to the test
procedures. Field metering of detector sensitivity may be
performed with the aid of a voltmeter and Test Kit,
MOD 400R.
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APPROVALS
FEATURES
Easy plug-in of the Head to Base
Built-in Tamper-resistant Feature
Built-in Test Switch
Built-in Visual Alarm Indicators
360
o
View Angle Of Alarm LEDs
Compatible with FCI Control Panels
Field Metering of Detector Sensitivity
Removable Insect Screen and Cover
for Field Cleaning
Sealed against Dirt, Insects, and
Back Pressure
Insect-resistant screening
(.020"/.508 mm openings)
TECHNICAL SPECIFICATIONS
Nominal sensitivity
Operating voltage
Operating temperature
Operating humidity
Air velocity
Construction
Diameter
Height
Weight
3.0 %/ft.
8.5 - 35 VDC (24 VDC nominal)
32
o
to- 120
o
F (0
o
to 49
o
C)
0 % - 93 % relative humidity
3,000 feet per minute maximum
Off-white flame retardant plastic
6.2 inches (15.7 cm)
3.3 inches (8.2 cm)
0.5 lb. (277 g)
16 Southwest Park, Westwood, MA 02090 USA TEL: (781) 471-3000 FAX: (781) 471-3099
An ISO 9001 Certified Company
9020-0585/Ver. 1.1
GAMEWELL-FCI [ GAMEWELL-FCI BY HONEYWELL ]
