System Sensor 2112, 24TSRB User Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS

2112/24TSRB Photoelectronic Smoke Detector

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: [phone]

Specifications
Diameter:	5.5 inches (140 mm)
Height (including mounting bracket):	1.7 inches (43 mm)
Weight:	5.3 oz. (150 g)
Operating Temperature Range:	32° to 100°F (0° to 39°C)
Operating Humidity Range:	10% to 93% relative rumidity, noncondensing
Latching Alarm:	Reset by momentary power interruption
Heat Sensor:	135°F fixed temperature electronic thermistor
Electrical Ratings
System Voltage	nominal:	12 or 24 VDC
	Minimum:	8.5 VDC
	Maximum:	35 VDC
Maximum Ripple Voltage:	30% of nom. voltage (peak to peak)
Standby Current:	15 mA maximum
Alarm Current:
	at 12V: 38 mA maximum
	at 24V:	45 mA maximum
Reset Voltage:	0.8 VDC minimum
Reset Time:	0.3 seconds maximum
Start-up Time:	30 seconds maximum (after 30 second reset)
Supervision and Alarm Initiation Contact Ratings
Resistive or inductive load (60% power factor)
Form A:	0.5A @ 30 VAC/DC

Before Installing

Please thoroughly read System Sensor manual I56-407,

Guide for Proper Use of 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.

NOTICE: This manual should be left with the owner/user of this equipment.

IMPORTANT: This detector must be tested and maintained following NFPA 72 requirements. The detector should be cleaned at least once a year.

mounting bracket and plug-in screw terminal block that can be prewired to the system, allowing the detector to be easily installed or removed for cleaning. The detector’s sensitivity can be tested in place using the MOD400R Test Module (available separately from System Sensor).

The 2112/24TSRB features a supervisory relay that supervises the power and the sensitivity of the detector. When the power to the detector is lost, the supervisory relay opens instantaneously. Where as, when the detector deviates from its sensitivity range indicating the need for maintenance, the supervisory relay opens after a maintenance condition has continuously existed for 30 to 35 minutes.

General Description
The Model 2112/24TSRB is a 4-wire photoelectronic smoke	An LED on the detector provides a local visual indication
detector that uses a state-of-the-art optical sensing cham-	of the detector’s status. If power is applied to the detector,
ber. This detector is designed to provide open area pro-	and it is functioning normally in standby, the status LED
tection. It features a restorable, built-in, fixed-temperature	blinks every ten seconds. The LED latches on in alarm and
(135°F) thermal sensor.	quits flashing when the detector deviates from its sensitiv-
	ity range.
Installation of this detector is simplified by the use of the

D200-61-00

1

I56-930-02

Figure 1. Surface mounting of 2112/24TSRB smoke detector on 31/2-inch and 4-inch octagonal box:

A78-2563-00

Mounting

The 2112/24TSRB detector is supplied with a mounting bracket that permits the detector to be mounted:

1.To a single gang box, or

2.Directly to a 31/2-inch or 4 inch octagonal box, or

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

Tamper-resistant Feature

This detector includes a tamper-resistant feature that prevents its removal from the bracket without the use of a tool. To make the detector tamper-resistant, remove the smaller tab by breaking it at the scribed line on the tamper resistant tab on the detector mounting bracket (see Figure 2), then install the detector. To remove the detector from the bracket once it has been made tamper resistant, use a small screwdriver to depress the tamper-resistant tab, located in the slot on the mounting bracket, and turn the detector counterclockwise.

Wiring Installation Guidelines

All wiring must be installed in compliance with the National Electrical Code, 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 reduce the likelihood of wiring errors. Improper connections can prevent a system from responding properly in the event of a fire.

Figure 2. Smoke detector mounting bracket:

TAMPER SLOT (DEPRESS TAB TO REMOVE DETECTOR)

The screw terminal block accepts 14 – 22 gauge wire. For best system performance, all wiring should be installed in separate grounded conduit. Do not mix fire system wiring in the same conduit as any other electrical wiring. Twisted pair may be used to provide additional protection against electrical interference.

Smoke detectors and alarm system control panels have specifications for allowable loop resistance. Consult the control panel specifications for the total loop resistance allowed for the control panel being used before wiring the detector loops.

Wire connections are made by stripping about 1/4 inch of insulation from the end of the feed wire, inserting the wire into the appropriate terminal, and tightening the screw to secure the wire in place.

NOTE: Trouble relay must be wired last in the circuit.

Installation

WARNING

Remove power from the control unit or initiating device circuits before installing detectors.

1.Wire the plug-in screw terminal block per Figure 3 and plug the terminal block into the detector.

2.Align the arrows on the detector with the arrows on the mounting bracket.

3.Turn the detector clockwise in the mounting bracket until it clicks into place.

4.After all detectors have been installed, apply power to the control unit or initiating device circuits.

5.Test the detector as described in TESTING.

6.Reset the detector at the system control panel.

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

TAMPER RESISTANT TAB (CUT OFF SMALL TAB TO ACTIVATE TAMPER-RESIST FEATURE)

ALIGNMENT

ARROWS

A78-2333-01

D200-61-00

2

I56-930-02