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1 / 4 page  D200-62-00 1 I56-932-12R 2112/24S and 2112/24TS Photoelectronic Smoke Detectors INSTALLATION AND MAINTENANCE INSTRUCTIONS 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 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. General Description Model 2112/24S 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 2112/24TS features a restorable, built-in, fixed-temperature (135° F) thermal detector. Specifications Diameter: 5.5 inches (140 mm) Height (including mounting bracket): 1.9 inches (48 mm) Weight: 5.3 oz. (150 g) Operating Temperature Range Model 2112/24S: 32° to 120° F (0° to 50° C) Model 2112/24TS: 32° to 100° F (0° to 38° C) Operating Humidity Range: 10% to 93% Relative Humidity, Noncondensing Latching Alarm: Reset by momentary power interruption Heat Sensor (2112/24TS 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 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 sen- sitivity 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 mode within the listed sensitivity ranges, the status LED blinks once every ten sec- onds. The LED also provides a visual indication that main- tenance is required. If the LED stops blinking, the detector is either not powered, out of the listed sensitivity range, and/or unable to function properly. The test switch will not operate if the detector is below the insensitive limit. The LED will also latch on when the detector is in alarm. |
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