Honeywell FCI 2451 Series User manual

DESCRIPTION
TheSystemSensor2451Series photoelectronicsmokede-
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.Thedetectorsaredesignedtoprovideopenareadetec-
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 (135oF) thermal detection
unit.
The detectors are of plug-in construction and plug into the
same base as the 1451 series ionization smoke detectors,
makingbothmodels interchangeable.Basesare availablefor
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.
The2451is ULListedformountinginsideducts upto ave-
locity of 3,000 FPM.
Sensitivity testing is performed either by applying a test
magnetorinsertinga calibratedtestcard accordingtothetest
procedures. Field metering of detector sensitivity may be
performed with the aid of a voltmeter and Test Kit,
MOD 400R.
APPROVALS
TECHNICAL SPECIFICATIONS
Nominal sensitivity 3.0 %/ft.
Operating voltage 8.5 - 35 VDC (24 VDC nominal)
Operating temperature 32oto- 120oF(0
oto 49oC)
Operating humidity 0%-93%relative humidity
Air velocity 3,000 feet per minute maximum
Construction Off-white flame retardant plastic
Diameter 6.2 inches (15.7 cm)
Height 3.3 inches (8.2 cm)
Weight 0.5 lb. (277 g)
2451
SYSTEM SENSOR
PHOTOELECTRONIC
SMOKE DETECTOR
9020-0585/Ver. 1.1
16 Southwest Park, Westwood, MA 02090 USA TEL: [phone] FAX: [phone]
FEATURES
·Easy plug-in of the Head to Base
·Built-in Tamper-resistant Feature
·Built-in Test Switch
·Built-in Visual Alarm Indicators
·360oView 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)
An ISO 9001 Certified Company

MOUNTING
·On a 4-inch square box with or without
plaster ring or supplied adapter. Minimum
depth 1.5 inches.
·On a 3 1/2 or 4-inch octagonal box. Minimum
depth 1.5 inches.
·On a single gang box. Min. depth 1.5 inches.
INSTALLATION
Place the detector into the detector base. Turn the de-
tector clockwise until the detector locks into place.
To use the tamper-proof feature, break the smaller tab
on the scribed line in the tamper proof tab located on the
detector mounting bracket. Install the detector. To re-
move the detector from the base when using the tam-
per-proof feature, insert the blade of a small
screwdriver into the hole on the side of the base and
push the plastic lever away from the detector head. This
will allow the detector to be rotated counterclockwise
for removal. NOTE: The decorative ring must be re-
moved in order to remove the head when using the tam-
per-proof feature.
The tamper-proof feature may be defeated perma-
nently by breaking the plastic lever off the base.
NOTE: The number of two-wire smoke detectors
which can be accommodated per zone varies with dif-
ferent control panels. Consult the control panel in-
struction manual to determine the capacity.
Refer to NFPA 72, Chapter 5-3 “Smoke Sensing Fire
Detectors” for spacing, location of detectors and other
guidelines.
TESTING
Detectors may be tested in the following ways:
·Place a test magnet against the cover opposite
the test module socket (See illustration above).
The detector should go into alarm within 5 sec-
onds.
·A test card with one end marked “ALARM”
and the other end marked “NO ALARM” is fur-
nished with each unit. For the complete proce-
dure, refer to the Installation and Maintenance
instructions furnished with each detector.
·Field metering of detector sensitivity may be
performed with the aid of a voltmeter and Test
Kit MOD 400R.
For the complete procedure, refer to the Installation
and Maintenance instructions furnished with each de-
tector.
MAINTENANCE
Cleaning programs should be adapted to the individ-
ual environment in conformance with NFPA Standard
72. We recommend, at the least, an annual cleaning of
theunit.The detectorscreen andcover assemblycan be
removed, revealing the sensing chamber. A vacuum
cleaner can be used to remove dust from the screen,
cover and sensing chamber. For the complete proce-
dure, refer to the Installation and Maintenance instruc-
tions furnished with each detector.
2of2 9020-0585
ORDERING AND TECHNICAL INFORMATION
Part No. Model Supv. Alarm Contacts Description
Current Current
2451 —— ‡—— Photoelectronic Detector
2451T —— ‡—— Photo. Detector w/135oF thermal
B401B .00012 A ‡—— Base, two-wire
B402B .00012 A .036 A Form A, C* Base, four-wire, 24 VDC operation
301B4AC Form A, C* & Supv. Base, four-wire, 120 VAC operation
RA-400 .007 A Remote Alarm Indicator
PAM-1 .015 A Form B End of Line Relay, 24 VDC
Test Kit
* Resistive load (contact ratings): Form A - 2.0 A. @ 30 VAC/DC
Form C - 2.0 A. @ 30 VAC/DC, 1.0A. @ 120 VAC
‡NOTE: Alarm current of detector is limited by control panel initiating device circuit.
WARNING: To prevent detector contamination
during construction, smoke detectors must be
protected from dust and contamination until area
is clean and dust free. See NFPA 72-5-3.7.1.3.
VIEWS SHOWING POSITION OF TEST MAGNET
Specifications are provided for information only, are not intended to be used for installation purposes, and are believed to be accurate. However, no responsibility is assumed by Fire Control
Instruments, Inc. for their use. Specifications subject to change without notice. ©2003 All Rights Reserved