System Sensor 2451A Manual de usuario

D400-02-01 REV#-002 1 I56-1020-000

2451A Photoelectronic Plug-in

INSTALLATION AND MAINTENANCE INSTRUCTIONS

Before Installing

Please thoroughly read the System Sensor publication,

I56-407, Applications Guide for System Smoke Detectors,

which provides detailed information on detector spacing,

placement, zoning, wiring, and special applications. Cop-

ies of this guide are available at no charge from System

Sensor. Please also refer to CAN/ULC-S524, Standard

for the Installation of Fire Alarm Systems and CEC Part 1,

Sec. 32..

NOTICE: This manual should be left with the owner/user

of this equipment.

IMPORTANT: This sensor must be tested and maintained

regularly following CAN/ULC-S536 requirements. This

sensor should be cleaned at least once a year.

General Description

The 2451A photoelectronic detector utilize state-of-the-art,

optical sensing chambers. This detector is designed to pro-

vide open area protection, and to be used with compatible

ULC-listed control panels only. The capability of plugging

this detector into a variety of special bases makes it more

versatile than equivalent direct-wired models.

Two LEDs on each detector light to provide a local 360°

visible alarm indication. They ash every ten seconds indi-

cating that power is applied and the detector is operating

properly. The LEDs light continuously in alarm. Remote

LED annunciator capability is available as an optional ac-

Speciﬁcations

Size

Height: 2.4 inches (61 mm)

Add 0.5 inches (13 cm) for thermal model 2451THA

Diameter: 4.0 inches (101 cm)

Weight: 0.5 lb. (277 g)

Operating Temperature Range: 0° to 49°C (32° to 120°F)

Operating Humidity Range: 10% to 93% Relative Humidity

Maximum Air Velocity: 3000 Ft./Min. (15 M/S)

Locking Alarm: Reset by momentary power interruption

Fixed Temperature Thermal: 135°F (57°C)

cessory. This detector also has the Latching Alarm feature.

The alarm can be reset only by a momentary power inter-

ruption. This detector may be tested by activating the inter-

nal reed switch with a magnet, or by inserting a calibrated

test card in a test slot after removing the detector cover.

Base Selection and Wiring Guide

Refer to the installation instructions for the Plug-in Detector

Bases for base selection and wiring instructions. System

Sensor has a variety of detector bases available for this

smoke detector. This includes 2-wire applications with and

without relays and/or current limiting resistors, 4-wire and

120VAC applications.

All bases are provided with screw terminals for power,

ground, remote annunciator connections and relay contact

connections, if applicable. The electrical ratings for each

detector-base combination are also included in the base

installation instructions.

Installation

NOTE: Wiring must conform to applicable local codes,

ordinances, and regulations.

NOTE: Verify that all detector bases are installed, that the

initiating-device circuits have been tested, and

that the wiring is correct. (Refer to detector base

manual for testing procedure.)

Smoke Detectors 6581 Kitimat Rd., Unit #6, Mississauga, Ontario, L5N 3T5

1-800-SENSOR2, FAX: 905-812-0771

www.systemsensor.ca

D400-02-01 REV#-002 2 I56-1020-000

Disconnect power from initiating-device circuits before in-

stalling detectors.

1. Install detectors:

a. Place the detector into the detector base

b. Turn the detector clockwise until the detector drops

into place.

c. Continue turning detector clockwise to lock it in

place.

2. Tamper-proof Feature

The detector bases include a feature that, when acti-

vated, prevents removal of the detector without the use

of a tool. See the installation instruction manual of the

detector base for details in using this feature.

3. Afer all detectors have been installed, apply power to

the control unit.

4. Test the detector using the magnet or the test card as

described under TESTING.

5. Reset the detector at the system control panel.

6. Notify the proper authorities that the system is back on

line.

Dust covers can be used to help limit dust entry to the

detector, but they are not a substitute for removing the

detector during building construction. Remove any dust

covers before placing system in service.

Testing

Before testing, notify the proper authorities that the smoke

detector system is undergoing maintenance and will tem-

porarily be out of service. Disable the zone or system un-

dergoing maintenance to prevent unwanted alarms.

Detectors must be tested after installation and periodic

maintenance. To test the 2451A:

NOTE: Before testing the detector, check to ensure that

the LEDs are blinking. If they are not, the detector

has lost power (check the wiring) or it is defective

(return for repair).

A. Test Magnet (System Sensor model no. M02-04-00)

Figure 1. Bottom and side views showing position of test magnet:

PAINTED

SURFACE

TEST

MAGNET

LED

TEST MODULE

SOCKET

TEST

MAGNET

A78-1213-00

D400-02-01 REV#-002 3 I56-1020-000

1. Place the magnet against the cover opposite the test

module slot to activate the test feature (see Figure

1).

2. The LEDs should latch on within 5 seconds indicating

alarm and annunciating the panel.

B. Calibrated Test Card (System Sensor no. R59-18-00)

1. Remove the detector cover by placing a small blad-

ed screwdriver in the side slot of the detector cover,

twisting it slightly until the cover can be turned coun-

terclockwise for removal.

2. Insert the NO ALARM end of the test card fully into the

test slot (see Figure 2) then slide it counterclockwise

until it stops.

3. Wait for at least 20 seconds. The detector should

NOT alarm.

4. Remove the test card by sliding it clockwise before

removing, then insert the ALARM end.

5. The LEDs should latch on within 20 seconds indi-

cating alarm and annunciating the panel.

6. Put the cover back by gently rotating it clockwise until

it locks in place.

C. Test Module (System Sensor no. MOD400R)

The MOD400R is used with your DMM or voltmeter

to check the detector sensitivity as described in the

MOD400R’s manual.

D. Aerosol Generator (Gemini 501)

Set the generator to represent 4% to 5%/Ft. obscuration

as described in the Gemini 501 Manual. Using the bowl

shaped applicator, apply aerosol until the unit alarms.

Notify the proper authorities that the detection system is

back on line.

Maintenance

It is recommended that the detector be removed from its

mounting base to facilitate easier cleaning. The detector is

cleaned as follows:

NOTE: Before removing the detector, notify the proper

authorities that the smoke detector system is un-

dergoing maintenance and will temporarily be out

of service. Disable the zone or system undergoing

maintenance to prevent unwanted alarms.

1. Remove the detector cover by placing a small bladed

screwdriver in the side slot of the detector cover, twisting

it slightly until the cover can be turned counterclockwise

for removal.

Figure 2:

REMOVABLE HEAD COVER

CLEANABLE SCREEN

HEAD COVER

REMOVAL SLOT

VANED CHAMBER

TEST SLOT

P/N RS24 (W/O THERMAL)

A78-1213-01

Detectors that fail these tests should be cleaned as de-

scribed under MAINTENANCE and retested. If the detec-

tors still fail these tests they should be returned for repair.

D400-02-01 REV#-002 4 I56-1020-000

Three-Year Limited Warranty

System Sensor warrants its enclosed smoke detector to be free from defects in ma-

terials 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 commencing

with the date of manufacture. After phoning System Sensor’s toll free number 1-

800-SENSOR2 (736-7672) for a Return Authorization number, send defective units

postage prepaid to: System Sensor, Repair Department, RA #__________, 6581

Kitimat Rd., Unit #6, Mississauga, Ontario, L5N 3T5. Please include a note describ-

ing the malfunction and suspected cause of failure. The Company shall not be obli-

gated to repair or replace units which are found to be defective because of damage,

unreasonable use, modications, or alterations occurring after the date of manu-

facture. 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 consequential dam-

ages, so the above limitation or exclusion may not apply to you. This Warranty gives

you specic legal rights, and you may also have other rights under common law.

2. Vacuum the screen carefully without removing it. If fur-

ther cleaning is required continue with Step 3, otherwise

skip to Step 6.

3. Remove the screen by pulling it straight out (see Figure

2). Vacuum the inside.

4. Clean the vaned chamber piece by vacuuming or blow-

ing out dust and particles.

5. To replace the screen, orient it so that the arrow on top

aligns with the test module socket of the detector. Care-

fully push the screen onto the base making sure it ts

tightly to the chamber.

6. Replace the cover by gently rotating it clockwise until it

locks in place.

7. Reinstall the detector.

8. Notify the proper authorities that the system is back on

line.

Please refer to insert for the Limitations of Fire Alarm Systems

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