System Sensor 2112_24R and 2112_24TR Photoelectronic - Manual (Page 2)

D200-83-00 2 I56-1239-02R
Figure 2. Surface mounting of 2112/24R and
2112/24TR smoke detector on 3 1 ⁄
2
-inch and 4-inch
octagonal box:
;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;
A78-2563-01
Figure 3. 2112/24R and 2112/24TR smoke detector mounting bracket:
A78-2333-04
If the LED stops blinking, the unit should be removed for
maintenance and inspection.
Mounting
Each 2112/24R and 2112/24TR 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 3
1 ⁄
2
inch or 4 inch octagonal 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 3), then
install the detector. To remove the detector from the brack-
et 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 jurisdic-
tion. 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 like-
lihood 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
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.
Before Installing
Please thoroughly read the System Sensor manual I56-407,
Guide for Proper Use of System Smoke Detectors, which pro-
vides 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 shall 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
Models 2112/24R and 2112/24TR are 4-wire photoelectron-
ic smoke detectors that use a state-of-the-art optical sens-
ing chamber. The 2112/24TR also provides restorable,
135˚F fixed-temperature heat detection. The 2112/24TR
heat-detection unit is integrated with the photoelectronic
sensor.
Installation of this detector is simplified by the use of a
mounting bracket and a 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 sen-
sitivity can be tested in place using the MOD400R Test
Module.
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 within the listed
sensitivity ranges, the status LED blinks every ten seconds.
The LED also latches on in alarm.
TAMPER SLOT
(DEPRESS TAB TO
REMOVE DETECTOR)
TAMPER RESISTANT TAB
(CUT OFF SMALL TAB TO
ACTIVATE TAMPER-RESIST
FEATURE)
ALIGNMENT
ARROWS