System Sensor 2112TL, 1112/24B, 1112/24BA Installation And Maintenance Instructions Manual

INSTALLATION AND MAINTENANCE INSTRUCTIONS

2112TL Photoelectronic

3825 Ohio Avenue, St. Charles, Illinois 60174

Smoke Detector

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 37.7°C)

Operating Humidity Range: 10% to 93% relative humidity, noncondensing
Latching Alarm: Reset by momentary power interruption

Heat Sensor: 135°F fixed temperature electronic thermistor

Electrical Ratings

System Voltage Nominal: 12 VDC

Minimum: 9.5 VDC

Maximum: 14 VDC
Maximum Ripple Voltage: 30% of nom. voltage (peak to peak)
Alarm Current (at 12 V): 13 mA maximum
Reset Voltage: 0.8 VDC minimum
Reset Time: 0.3 seconds maximum
Start-up Time: 30 seconds maximum (after 30 second reset)

A Division of Pittway

1-800-SENSOR2, FAX: [phone]

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.

General Description

The Model 2112TL is a 4-wire photoelectronic smoke detec­tor that uses a state-of-the-art optical sensing chamber.
This detector is designed to provide open area protection. It

features restorable, built-in, fixed-temperature (135°F)

thermal sensors.

Installation of this detector is simplified by the use of the
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 2112TL features transistors that provide alarm, power
supervisory, and sensitivity status signals for complete
smoke detector performance.

NOTE: The alarm and supervisory outputs are not to be

used as relay contacts.

In addition, an LED on the detector provides a local visual
indication of the detector’s status. If power is applied to the
detector, and it is functioning normally in standby, the sta­tus LED blinks every ten seconds. The LED latches on in
alarm and quits flashing when the detector deviates from
its sensitivity range.

D200-66-00 1 I56-997-02

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

A78-2563-00

Mounting

The 2112TL 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.

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.

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)

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)

D200-66-00 2 I56-997-02

ALIGNMENT
ARROWS

A78-2333-04