System Sensor 2112 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
Diameter: 5.5 inches (140 mm)
Height (including mounting bracket): 2.05 inches (52 mm)
Weight: 7.5 oz. (210 g)
Operating Temperature Range: 32° to 100°F (0° to 38°C)
Operating Humidity Range: 10% to 93% Relative Humidity, Noncondensing
Latching Alarm: Reset by momentary power interruption
Audible Signal: 85 dBA minimum when in alarm or with supply polarity reversed
Heat Sensor: 135°F Fixed Temperature Electronic Thermistor
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 applica-
tions. 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
firealarmresources.com

System Sensor 2112 Specifications

General

Model Number	2112
Type	Photoelectric
Voltage	12 VDC
Operating Temperature Range	32°F to 120°F (0°C to 49°C)
Humidity Range	10% to 93% non-condensing

Summary

Detector Specifications and Electrical Ratings

Specifications

Details physical dimensions, operating ranges, and alarm features of the smoke detector.

Electrical Ratings

Outlines voltage, current, and timing parameters for the detector's electrical functions.

General Description and Wiring

General Description

Introduces the 2112/24AITR detector, its sensing technology, and audible alarm features.

Wiring Installation Guidelines

Provides essential rules and recommendations for proper wiring of the smoke detector system.

Smoke Detector Installation Procedures

Mounting the Detector

Explains the methods for physically attaching the smoke detector to various electrical boxes.

Tamper-resistant Feature

Details how to activate and use the detector's tamper-resistance mechanism.

Where to Install Smoke Detectors

Offers guidance on optimal placement for smoke detectors in residential settings.

Where Smoke Detectors Should NOT Be Installed

Lists locations and environmental conditions to avoid for smoke detector installation.

Installation Requirements

Covers safety warnings and step-by-step instructions for installing the smoke detector.

Testing and Maintenance

Detector Testing

Describes methods for testing the smoke detector's functionality after installation and maintenance.

Detector Maintenance

Provides instructions for cleaning and maintaining the smoke detector's sensing chamber.