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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.

Summary of content (4 pages)

PAGE 1
INSTALLATION AND MAINTENANCE INSTRUCTIONS 1412B and 1424 Direct Wire Ionization Smoke Detectors 3825 Ohio Avenue, St. Charles, Illinois 60174 1-800-SENSOR2, FAX: 630-377-6495 www.systemsensor.com 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.
PAGE 2
Figure 1. Flush mounting of detector on 4 inch octagonal box: Figure 2. Detector mounting bracket: TAMPER RESISTANT TAB S0139-00 TO MAKE DETECTOR TAMPER RESISTANT, BREAK OFF TAB EXTENSION AT SCRIBED LINE 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, 11⁄2 inch deep electrical box, or 2. To a 4 inch square electrical box by using a plaster ring with the supplied mounting bracket kit.
PAGE 3
Wire connections are made by stripping about 3⁄8″ of insulation 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. CAUTION Smoke detectors are not to be used with detector guards unless the combination has been evaluated and found suitable for that purpose.
PAGE 4
Maintenance NOTE: Before starting, notify the proper authorities that the smoke detector system is undergoing maintenance, 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: Figure 5. Removal of cover and screen for cleaning: REMOVABLE COVER FOR CLEANING 1.