System Sensor 2112 - Manual

D200-61-00 1 I56-930-02
2112/24TSRB Photoelectronic
Smoke Detector
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 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
The Model 2112/24TSRB is a 4-wire photoelectronic smoke
detector that uses a state-of-the-art optical sensing cham-
ber. This detector is designed to provide open area pro-
tection. It features a restorable, built-in, fixed-temperature
(135°F) thermal sensor.
Installation of this detector is simplified by the use of the
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: 32° to 100°F (0° to 39°C)
Operating Humidity Range: 10% to 93% relative rumidity, noncondensing
Latching Alarm: Reset by momentary power interruption
Heat Sensor: 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: 15 mA maximum
Alarm Current:
at 12V: 38 mA maximum
at 24V:
45 mA maximum
Reset Voltage: 0.8 VDC minimum
Reset Time: 0.3 seconds maximum
Start-up Time: 30 seconds maximum (after 30 second reset)
Supervision and Alarm Initiation Contact Ratings
Resistive or inductive load (60% power factor)
Form A: 0.5A @ 30 VAC/DC
mounting bracket and 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 (available separately from System Sensor).
The 2112/24TSRB features a supervisory relay that super-
vises the power and the sensitivity of the detector. When
the power to the detector is lost, the supervisory relay
opens instantaneously. Where as, when the detector devi-
ates from its sensitivity range indicating the need for main-
tenance, the supervisory relay opens after a maintenance
condition has continuously existed for 30 to 35 minutes.
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 latches on in alarm and
quits flashing when the detector deviates from its sensitiv-
ity range.