System Sensor 2112-24AITR User Manual

D200-85-00 1 I56-1241-03R
2112/24AITR Photoelectronic Smoke Detector with Fixed Heat and Integral Temp-3 Sounder
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
Specifications
Electrical Ratings
System Voltage (nominal): 12 or 24 VDC
Minimum: 10 VDC
Maximum: 35 VDC Maximum Ripple Voltage: 30% of nom. Voltage (peak to peak) Standby Current: 50 µA maximum Alarm Current: 49 mA typical, 60 mA max. at 12V
57 mA typical, 65 mA max. at 24V Reset Voltage: 0.8 VDC minimum Reset Time: 1.0 second maximum Start-up Time: 30 seconds maximum (after 60 sec. reset) EOL Relay: A77-716B, 12/24 VDC
Note: Relay changes only when the thermal alarm state is reached Alarm Initiation and Auxiliary Relay: 1A @ 30 VAC Contact Ratings, Resistive Load: 1A @ 30 VDC Special Considerations: Due to the built-in temporal pattern, use these detectors only with a non-coded power supply.
Figure 1. Wiring diagram for the 2112/24AITR detector:
A78-2336-16
Before Installing
Please thoroughly read the System Sensor manual I56-407, Guide for Proper Use of System Smoke Detectors, which provides detailed informa-
tion 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.
IMPORTANT: OBSERVE POLARITY
As with all sounder models, polarity must be observed on the power connections.
OPTIONAL CLASS A WIRING
EOL RESISTOR SPECIFIED BY PANEL MANUFACTURER
EOL POWER SUPERVISION RELAY (SHOWN ENERGIZED) A77-716 12/24V
POWER
TO
DETECTORS
UL LISTED
COMPATIBLE
CONTROL
PANEL
INITIATING
LOOP
+
P
W
R
A U X
P
W
R
A U X
+ + –
A A NC
C
NO
+ + –
A A NC
C
NO
ALARM CONTACT
ALARM CONTACT
(OPTIONAL) RELEASING
DEVICE
NC
COMMON
NO
(OPTIONAL) RELEASING
DEVICE
NC
COMMON
NO
D200-85-00 2 I56-1241-03R
TAMPER SLOT (DEPRESS TAB TO REMOVE DETECTOR)
TAMPER RESISTANT TAB (CUT OFF SMALL TAB TO ACTIVATE TAMPER-RESIST FEATURE)
ALIGNMENT ARROWS
Figure 3. 2112/24AITR smoke detector mounting bracket:
A78-2333-01
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.
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.
Installation Where to Install Smoke Detectors
Warning: As a minimum requirement, smoke detectors must be installed in accordance with the National Fire Protection Agency (NFPA) Standard 72 which defines the standards for the National Fire Alarm Code (National Fire Protection Association, Batterymarch Park, MA 02269-9101). In addi­tion, observe all local and national building and electrical codes.
Proper Detector Location: Figure 1: Recommended smoke detector protection for single­floor residence with only one sleeping area
Figure 2: Recommended smoke detector protection for single­floor residence with more than one sleeping area:
NFPA 72, Chapter 2, Section 2-2.1.1.1 states as follows: “Smoke detectors shall be installed outside of each separate sleeping area in the immediate vicinity of the bedrooms and on each additional story of the family living unit, including basements and excluding crawl spaces and unfinished attics. In new construction, a smoke detector also shall be installed in each sleeping room.”
The above NFPA standard is a minimum requirement for smoke detec­tor installation. For better protection, we also require the installation of a smoke detector inside every bedroom in existing construction.
Install a minimum of two smoke detectors in any household, no matter how small it is.
Put a smoke detector in the hallway outside of every separate bed­room area. (See Figure 1.) A minimum of two detectors are required
in homes with two bedroom areas. (See Figure 2.)
BEDROOM
SMOKE DETECTORS FOR MINIMUM PROTECTION
SMOKE DETECTORS FOR MORE PROTECTION AND REQUIRED IN NEW CONSTRUCTION
BEDROOM
BEDROOM
LIVING ROOM
DINING
ROOM
KITCHENFAMILY ROOM
DINING ROOM KITCHEN BEDROOM BEDROOM
BEDROOMLIVING ROOM
SMOKE DETECTORS FOR MINIMUM PROTECTION SMOKE DETECTORS FOR MORE PROTECTION AND
REQUIRED IN NEW CONSTRUCTION
General Description
Model 2112/24AITR is a 4-wire photoelectronic smoke detector that uses a state-of-the-art optical sensing chamber. This detector also provides restorable, 135˚F fixed-temperature heat detection. The photoelectronic smoke sensor is isolated from the fixed-temperature heat sensor, provid­ing a self-resetting, local audible smoke alarm that does not alarm at the panel. Only the fixed-temperature heat sensor will cause the 2112/24AITR to alarm at the panel and the relay to change its state.
In addition, a piezoelectric horn in each detector produces an interrupted, 85 dBA tone when the individual detector alarms or when the supply volt­age polarity is reversed.
NOTE: In order for all detectors on a loop to sound when the panel alarms, the panel must reverse the supply voltage polarity to that loop upon alarm. For panels that do not reverse the polarity during alarm, a reversing relay, such as System Sensor’s RR-2, must be used. The RR-2 is designed to allow all the detectors in the same loop to sound when one of the detectors goes into alarm. Some pan­els may require the use of programmable outputs. Refer to System Sensor literature for further information on the RR-2.
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 sensitivity 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 range, the status LED blinks every ten seconds. The LED also latches on in alarm.
If the LED stops blinking, the unit should be removed for maintenance and inspection.
Mounting
Each 2112/24AITR 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.
4. Directly to the ceiling using drywall anchors, if permitted by local codes and/or the authority having jurisdiction.
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 tamper­resistant, 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 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.
A78-1171-01
A78-1171-02
Figure 2. Surface mounting of 2112/24AITR smoke detector on 31⁄2-inch and 4-inch octagonal box:
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