D200-62-00

2

I56-932-12R

Mounting

Each 2112/24S and 2112/24TS detector is supplied with a

mounting bracket that permits the detector to be mounted:

1. To a single gang box, or

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

4. Directly to the ceiling using drywall anchors, if permit-

ted by local codes and/or the authority having jurisdic-

tion.

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 screw-

driver to depress the tamper-resistant tab, located in the

slot on the mounting bracket, and turn the detector coun-

terclockwise.

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.

The screw terminal block accepts 14 – 22 gauge wire. For

best system performance, all wiring should be installed in

Figure 1. Surface mounting of 2112/24S smoke

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A78-2563-00

Figure 2. 2112/24S and 2112/24TS smoke detector mounting bracket:

A78-2333-01

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 al-

lowed for the control panel being used before wiring the

detector loops.

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.

Installation

WARNING

Remove power from the control unit or initiating device cir-

cuits 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. (See page 3.)

6. Reset the detector at the system control panel.

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

CAUTION

Dust covers are an effective way to limit the entry of dust

into smoke detector sensing chambers. However, they may

not completely prevent airborne dust particles from enter-

ing the detector. Therefore, System Sensor recommends the

removal of detectors before beginning construction or other

dust producing activity. Be sure to remove dust covers from

any sensors that were left in place during construction as

part of returning the system to service.

TAMPER SLOT

(DEPRESS TAB TO

REMOVE DETECTOR)

TAMPER RESISTANT TAB

(CUT OFF SMALL TAB TO

ACTIVATE TAMPER-RESIST

FEATURE)

ALIGNMENT

ARROWS

C OVER

REMOVAL