Manual

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D200-82-00 1 I56-1237-01R

2112/24AT

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

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

DETECTORS

UL LISTED

COMPATIBLE

CONTROL

PANEL

INITIATING

LOOP

–

ALARM

CONTACT

ALARM

CONTACT

NOT USED

Summary of content (4 pages)

PAGE 1
INSTALLATION AND MAINTENANCE INSTRUCTIONS 2112/24AT Photoelectronic Smoke Detector with Fixed Heat and Integral Temp-3 Sounder 3825 Ohio Avenue, St. Charles, Illinois 60174 1-800-SENSOR2, FAX: 630-377-6495 Figure 1. Wiring diagram for the 2112/24AT detector: IMPORTANT: OBSERVE POLARITY As with all sounder models, polarity must be observed on the power connections.
PAGE 2
If the LED stops blinking, the unit should be removed for maintenance and inspection. Figure 2. Surface mounting of 2112/24AT smoke detector on 31/2-inch and 4-inch octagonal box: Mounting Each 2112/24AT detector is supplied with a mounting bracket that permits the detector to be mounted: 1. To a single gang box, or 2. Directly to a 3-1/2 inch or 4 inch octagonal box, or 3. To a 4 inch square electrical box by using a plaster ring. 4.
PAGE 3
Wire connections are made by stripping about 1/4 inch of insulation from the end of the feed wire, inserting the wire into the appropriate terminal, and tightening the screw to secure the wire in place. 2. Press and hold the recessed test switch with a 0.18 inch maximum diameter tool such as an allen wrench or small screwdriver. 3. The detector’s LED should light within 5 seconds. B. Test Module (System Sensor Model No. MOD400R).
PAGE 4
2. Vacuum the screen carefully without removing it. 3. Remove screen assembly, pulling straight out (please see Figure 5). 4. Remove the sensing chamber cover. 5. Clean the sensing chamber by vacuuming or blowing out dust and particles. 6. Replace the sensing chamber cover, aligning the arrow on the cover top with the arrow on the printed circuit board. 7. Replace the screen by placing the screen assembly over the sensing chamber cover and twisting until it snaps into place. 8.