System Sensor 1424 Manual de usuario

D400-08-00 1 I56-280-05R

1412B and 1424 Direct Wire

Ionization Smoke Detectors

INSTALLATION AND MAINTENANCE INSTRUCTIONS

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: 630-377-6495

www.systemsensor.com

Before Installing

Please thoroughly read the System Sensor manual A05-

1003, Applications Guide for System Smoke Detectors,

which provides detailed information on detector spacing,

placement, zoning, wiring, and special applications. Copies

of this manual are available at no charge from System

Sensor. (For installation in Canada, refer to CAN/ULC-

S524, Standard for the Installation of Fire Alarm Systems

and CEC Part 1, Sec. 32.)

General Description

System Sensor 1412 and 1424 dual-chamber ionization

smoke detectors utilize state-of-the-art, unipolar sensing

chambers. These detectors are designed to provide open

area protection, and to be used with UL-listed 4-wire con-

trol panels. The 1412 for 12 volt panels operates at 12VDC,

and the 1424 for 24 volt panels operates at 24VDC. The

detectors’ operation and sensitivity can be tested in place.

These detectors are listed to UL 268 and are latching type

system detectors. When latched in alarm, the detectors

must be reset by a momentary power interruption.

Specifications

Diameter: 5.5 inches (14 cm)

Height: 3.12 inches (8.0 cm)

Weight: 0.7 lb (310 gm)

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

Operating Humidity: 10% to 93% Relative Humidity Non-condensing

Locking Alarm: Reset by momentary power interruption.

Relay Contact Ratings

Resistive or Inductive (60% power factor) load

Form A: 2.0A @ 30VAC/DC

Form C:* 0.6A @ 110VDC, 2.0A @ 30VDC

1.0A @ 125VAC, 2.0A @ 30VAC

*For Canadian installations, relay contact rating is 2.0A @ 30VAC/DC

Electrical Ratings: 1412 1424

System Voltage: 12 24 DC (4V Maximum Ripple)

Supply Voltages: 11.3 20 VDC Minimum

17.3 29 VDC Maximum

Reset Voltages: .73 .8 VDC Minimum

Standby Current: 100 100 µA Maximum

Alarm Currents: 35.2 21.3 mA Minimum

77.0 40.6 mA Maximum

The alarm and auxiliary relay operate within the specified voltage ratings.

Reset Time: 0.3 0.3 Seconds

Start-up Time: 30 30 Seconds

An LED on the detector provides a local indication of the

detector’s status. If power is applied to the detector, and

the detector is functioning properly in standby, the status

LED will blink every 10 seconds. In alarm, the LED will be

latched on continuously until the detector is reset.

Each detector contains one Form A (SPST-NO) contact for

connection to the alarm-initiating circuit, and one Form

C (SPDT-NO/NC) set of auxiliary contacts. Supervision

of detector power is accomplished by installing a Power

Supervisory End-of-Line Relay Module (A77-716) at the end

of the detector power loop. When power is applied to and

through the detectors, the EOL Power Supervisory Module

is energized. Its relay contacts close and provide a closed

series circuit in the control panel’s alarm-initiating loop. A

power failure or a break in the detector power loop de-ener-

gizes the EOL Module. The relay contacts open and trigger

a trouble signal at the control panel.

D400-08-00 2 I56-280-05R

Mounting

Each 1412 and 1424 detector is supplied with a mounting

bracket kit that permits the detector to be mounted:

1. Directly to a 31

⁄2 inch or 4 inch octagonal, 1

⁄2 inch deep

electrical box, or

2. To a 4 inch square electrical box by using a plaster ring

with the supplied mounting bracket kit.

Spacing

Spacing of 30 ft. on a smooth ceiling as per NFPA 72E.

Where conditions or response requirements vary, other

spacing may apply.

Wiring Installation Guidelines

All wiring must be installed in compliance with the National

Electrical Code and the applicable local codes, and any spe-

cial requirements of the local authority having jurisdiction.

Proper wire gauges should be used. The conductors used

to connect smoke detectors to control panels and accessory

devices should be color-coded to prevent wiring mistakes.

Improper connections can prevent a system from respond-

ing properly in the event of a fire.

NOTE: Refer to releasing device manufacturer’s installa-

tion instruction for proper connections.

NOTE: Contacts are shown in stand-by mode and will

transfer in alarm condition.

CAUTION

For system supervision: for terminals 1, 2, 7, and 8, do not

use looped wire under terminals. Break wire run to provide

system supervision of connections.

For signal wiring (the wiring between interconnected

detectors), it is recommended that the wire be no smaller

than 18 gauge. Wire sizes up to 12 gauge wire may be

used. For best system performance, the power (+) and (–)

loop wires should be twisted pair and installed in separate

grounded conduit to protect the loop from extraneous elec-

trical interference.

Smoke detectors and alarm system control panels have

specifications for allowable loop resistance. Consult the

control panel manufacturer’s specifications for the total

loop resistance allowed for the particular model control

panel being used before wiring the detector loops.

TAMPER

RESISTANT

TAB

TO MAKE DETECTOR TAMPER RESISTANT,

BREAK OFF TAB EXTENSION

AT SCRIBED LINE

Figure 1. Flush mounting of detector on 4 inch

octagonal box:

Figure 2. Detector mounting bracket:

S0139-00

S0140-00

COMMON

N/O

N/C

AUXILIARY

CONTACTS

FORM C

456

POWER

ALARM

CONTACTS

FORM A

N/O

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A78-1811-00

S0165-00

Figure 3. Wiring diagram for models 1412 and 1424 detectors used with Class A or

Class B four-wire control panels.

D400-08-00 3 I56-280-05R

Wire connections are made by stripping about 3⁄8″ of insu-

lation from the end of the wire (use strip gauge molded in

base), sliding the bare end of the wire under the clamping

plate, and tightening the clamping plate screw. A typical

wiring diagram for a 4-wire detector system is shown in

Figure 3.

Tamper-proof Feature

This detector includes a tamper-proof feature that, when

activated, prevents removal of the detector without the use

of a tool. To activate this feature, break off the smaller tab

at the scribed line on the tamper-proof tab, located on the

detector mounting bracket (see Figure 2), then install the

detector. To remove the detector from the bracket once the

tamper-proof feature has been activated, depress the tam-

per-proof tab located in the slot on the mounting bracket

(see Figure 4) and turn the detector counterclockwise for

removal.

Installation

WARNING

Remove power from initiating-device circuits before install-

ing detectors.

1. Wire detector per installation guidelines.

2. Line up arrows on the detector with arrows on the

mounting bracket.

3. Turn the detector clockwise until it clicks into place.

4. After all detectors have been installed, apply power to

the control unit.

5. Test the detector as described under TESTING.

6. Reset the detector at the system control panel.

7. Notify the proper authorities the system is in operation.

CAUTION

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.

CAUTION

Smoke detectors are not to be used with detector guards

unless the combination has been evaluated and found

suitable for that purpose.

Testing

NOTE: Before testing, notify the proper authorities that

the smoke detector system is undergoing main-

tenance, and therefore will temporarily be out of

service. Disable the zone or system undergoing

maintenance to prevent unwanted alarms.

Before testing the detector, look for the presence of the

flashing LED. If it does not flash, power has been lost to

the detector (check the wiring), or it is defective (return for

repair, see warranty information).

Detectors must be tested after installation and following

periodic maintenance. The 1412 and 1424 may be tested

as follows:

A. Recessed Test Switch

1. A test switch is located on the detector housing (see

Figure 4).

2. Push and hold the recessed test switch with a 0.1 inch

maximum diameter tool.

3. The LED on the detector should light within 30 sec-

onds.

4. Reset the detector at the system control panel.

B. Test Module (System Sensor Model No. MOD400R)

The MOD400 or MOD400R is used with an analog or

digital voltmeter to check the detector sensitivity as

described in the test module’s manual.

C. Aerosol Generator (Gemini 501)

Set the generator to represent 4%/ft. to 5%/ft. obscura-

tion as described in the Gemini 501 manual. Using the

bowl shaped applicator, apply aerosol until unit alarms.

Notify the proper authorities the system is back on line.

Detectors that fail these tests should be cleaned as described

under MAINTENANCE and retested. If the detectors still

fail these tests, they should be returned for repair.

PUSH RECESSED TEST SWITCH WITH

A 0.1" MAX. DIAMETER TOOL.

TEST MODULE

SOCKET

LED

RECESSED

TEST SWITCH

TAMPER SLOT

Figure 4. Bottom and side view showing position of test switch:

S0142-00

D400-08-00 4 I56-280-05R

System Sensor warrants its enclosed smoke detector to be free from

defects 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 obliga-

tion 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

workmanship under normal use and service during the three year period

commencing 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

Figure 5. Removal of cover and screen for cleaning:

LOCK PRONG

REMOVABLE SCREEN

(P/N RS14)

REMOVABLE

COVER

FOR

CLEANING

SENSING CHAMBER

Maintenance

NOTE: Before starting, notify the proper authorities that

the smoke detector system is undergoing main-

tenance, and therefore will temporarily be out of

service. Disable the zone or system undergoing

maintenance to prevent unwanted alarms.

The 1412 and 1424 are cleaned as follows:

1. Remove the detector screen and cover assembly by

depressing the three lock prongs on the top of the cover,

rotate the cover counterclockwise, and pull the screen

and cover assembly away from the detector (see Figure

5). Usage of System Sensor CRT400 cover removal tool

is recommended.

2. Remove the screen from the cover.

3. Use a vacuum cleaner to remove dust from the screen,

the cover, and the sensing chamber.

4. After cleaning, snap the screen into the cover, then place

the cover and screen assembly on the detector, turning

clockwise until it is locked in place.

5. Test detector as described under TESTING.

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

line. S0138-00

Please refer to insert for the Limitations of Fire Alarm Systems

Three-Year Limited Warranty

Department, 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,

modifications, 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 neg-

ligence or fault. Some states do not allow the exclusion or limitation of

incidental or consequential 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.

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