System Sensor 1412B, 1424 User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS

1412B and 1424 Direct Wire			3825 Ohio Avenue, St. Charles, Illinois 60174
Ionization Smoke Detectors			1-800-SENSOR2, FAX: [phone]
			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.
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

Before Installing

Please thoroughly read the System Sensor manual A051003, 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/ULCS524, 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 control 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.

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

1

I56-280-05R

Figure 1. Flush mounting of detector on 4 inch	Figure 2. Detector mounting bracket:
octagonal box:	TAMPER
	RESISTANT
	TAB

S0139-00
TO MAKE DETECTOR TAMPER RESISTANT,
BREAK OFF TAB EXTENSION
AT SCRIBED LINE	S0140-00

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.

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 special 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 responding properly in the event of a fire.

NOTE: Refer to releasing device manufacturer’s installation 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 electrical 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.

Figure 3. Wiring diagram for models 1412 and 1424 detectors used with Class A or Class B four-wire control panels.

POWER

+

-

2

1

AUXILIARY

COMMON

N/O

CONTACTS

N/C

FORM C

8

7

ALARM

4

5

CONTACTS

6

FORM A

N/O

A78-1811-00

S0165-00

D400-08-00

2

I56-280-05R