Mounting, Tamper-resistant Feature | System Sensor 2112, 24TSRB

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 pre- vents 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 Na- tional Electrical Code, 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 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 un- til 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

I56-930-02