D200-82-00
1
I56-1237-00
2112/24AT
Photoelectronic Smoke Detector with
Fixed Heat and Integral Temp-3 Sounder
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
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
µ
A 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
Alarm Initiation
Contact Rating, Resistive Load:
1A @ 30 VDC
Special Considerations:
Due to the built-in temporal pattern, use this detector only with a non-coded
power supply.
Figure 1. Wiring diagram for the 2112/24AT detector:
A78-2336-14
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.
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
P
W
R
+
+
–
A
A
+
+
–
A
A
ALARM
CONTACT
ALARM
CONTACT
NOT USED
NOT USED
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