System Sensor 24ATR specifications Specifications, Electrical Ratings, Before Installing

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INSTALLATION AND MAINTENANCE INSTRUCTIONS

2112/24ATR

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 2112/24ATR detector:

IMPORTANT: OBSERVE POLARITY

As with all sounder models, polarity must be observed on the power connections.

POWER + TO

DETECTORS

UL LISTED

COMPATIBLE

CONTROL

PANEL

INITIATING

LOOP

 

 

 

 

 

 

 

 

EOL POWER

 

 

 

 

 

 

 

 

SUPERVISION

 

 

 

 

 

 

 

 

RELAY (SHOWN

 

 

+

P

 

 

+

P

ENERGIZED)

 

 

+ W

 

 

+ W

A77-716 12/24V

 

 

 

 

 

 

 

R

 

 

R

 

 

 

A

ALARM

 

 

A

ALARM

 

 

NC

A

CONTACT

NC

A

CONTACT

EOL RESISTOR

 

NC A

(OPTIONAL)

NC A

(OPTIONAL)

COMMON

COMMON

SPECIFIED BY

RELEASING

NO

C

U

RELEASING

NO

C

U

PANEL

DEVICE

NO X

DEVICE

NO X

MANUFACTURER

 

 

OPTIONAL CLASS A WIRING

A78-2336-16

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 and Auxiliary Relay:

1A @ 30 VAC

Contact Ratings, Resistive Load:

1A @ 30 VDC

Special Considerations:

Due to the built-in temporal pattern, use these detectors only with a non-coded

 

power supply.

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.

D200-84-00

1

I56-1240-02R

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Contents Before Installing SpecificationsElectrical Ratings Wiring Installation Guidelines Tamper-resistant FeatureGeneral Description MountingTesting InstallationMaintenance Removal of cover and screen for cleaning

24ATR specifications

The System Sensor 24ATR is a reliable and highly advanced smoke detector designed for commercial and industrial applications. This innovative device combines a range of features, technologies, and characteristics that ensure efficient smoke detection, enhancing safety and protection in various environments.

One of the standout features of the 24ATR is its use of dual-sensor technology. This integration of both ionization and photoelectric sensors allows the unit to respond more effectively to different types of fires. Ionization sensors are particularly responsive to flaming fires, while photoelectric sensors excel in detecting smoldering fires. This dual capability enables the 24ATR to provide comprehensive detection, reducing false alarms and improving overall safety.

The System Sensor 24ATR also incorporates advanced signal processing algorithms. These algorithms analyze sensor data in real-time, allowing for quicker and more accurate detection of smoke particles. This feature enhances the unit's ability to discern genuine threats from non-threatening sources like cooking fumes or dust, which are common triggers for nuisance alarms.

Another significant advantage of the 24ATR is its built-in sounder. This sounder emits an audible alarm when smoke is detected, ensuring that occupants are promptly alerted in the event of an emergency. The volume and tone of the sound are adjustable, allowing customization according to specific environmental needs, making it adaptable for various settings.

Moreover, the 24ATR is designed with ease of installation and maintenance in mind. The device is compatible with various mounting options and can easily integrate into existing fire alarm systems. Additionally, the unit's low profile and sleek design make it aesthetically pleasing, ensuring that safety features do not compromise the look of a facility.

The robustness of the System Sensor 24ATR extends to its durability in harsh environments. It is built to withstand a range of temperatures and humidity levels, ensuring reliable performance under different conditions. The detector is also equipped with a sealed housing to prevent dust and dirt intrusion, which can impair sensor functionality.

In summary, the System Sensor 24ATR stands as an exemplary smoke detection solution, featuring dual-sensor technology, advanced signal processing, an integrated sounder, ease of installation, and durable construction. With these attributes, it is an ideal choice for ensuring safety in commercial and industrial environments, providing peace of mind to building owners and occupants alike.