System Sensor 2112_24B and 2112_24TB Photoelectronic - Manual

D200-62-00 1 I56-932-01
2112/24B and 2112/24TB
Photoelectronic
Smoke Detectors
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
Before Installing
Please thoroughly read the System Sensor manual I56-407,
Guide for Proper Use of System Smoke Detectors, which
provides detailed information on detector spacing, place-
ment, zoning, wiring, and special applications. Copies of
this manual are available at no charge from System Sensor.
NOTICE: This manual should 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
Model 2112/24B is a 4-wire photoelectronic smoke detector
that uses a state-of-the-art optical sensing chamber. This
detector is designed to provide open area protection. Model
Specifications
Diameter: 5.5 inches (140 mm)
Height (including mounting bracket): 1.7 inches (43 mm)
Weight: 5.3 oz. (150 g)
Operating Temperature Range
Model 2112/24B: 32° to 120°F (0° to 50°C)
Model 2112/24TB: 32° to 100°F (0° to 39°C)
Operating Humidity Range: 10% to 93% Relative Humidity, Noncondensing
Latching Alarm: Reset by momentary power interruption
Heat Sensor (2112/24TB only): 135°F Fixed Temperature Electronic Thermistor
Electrical Ratings
System Voltage (nominal): 12 or 24 VDC
Minimum: 8.5 VDC
Maximum: 35 VDC
Maximum Ripple Voltage: 30% of nom. Voltage (peak to peak)
Standby Current: 50 µA maximum
Alarm Current: 17 mA typical, 23 mA max. at 12V
19 mA typical, 25 mA max. at 24V
Reset Voltage: 0.8 VDC minimum
Reset Time: 0.3 seconds maximum
Start-up Time: 30 seconds maximum (after 60 sec. reset)
EOL Relay: A77-716B, 12/24 Volt
Alarm Initiation Contact Ratings
Resistive or inductive load (60% power factor)
Form A: 0.5A @ 30 VAC/DC
2112/24TB features a restoreable, built-in, fixed-tempera-
ture (135°F) thermal detector.
Installation of these detectors 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, the status LED blinks
every ten seconds. The LED also latches on in alarm.
Models 2112/24B and 2112/24TB feature a visual indication
that maintenance is required – if the sensing chamber drifts
out of its sensitivity limits, the LED ceases to blink.