Duct Smoke Detector Description:

The Duct Smoke Detector is a 4-wire photoelectric duct smoke detector that features a pivoting housing. It fits both square and rectangular footprints, and it mounts to round or rectangular ductwork. This unit senses smoke in the most challenging conditions, operating in airflow speeds of 100 to 4,000 feet per minute, temperatures of –4°F to 158°F, and a humidity range of 0 to 95 percent (noncondensing).

In addition, a plug-in sensor head offers improved false alarm immunity and simple installation, testing, and maintenance. An improved cover design isolates the sensor head from the low-flow feature for simple maintenance. It also provides ample wiring space, a ¾-inch conduit knockout, and built-in short circuit protection to prevent damage to sensitive components during installation. Additionally, high contrast terminal designations make wiring easy. With its 2:1 sensor-to-power capability, the power board of the Duct Smoke Detector may be used to monitor a second sensor simultaneously (i.e., supply and return side).

Additional Info:

When one unit senses smoke, all interconnected detectors will switch their relays; only the detector sensing smoke will go into alarm.  So this will pinpoint the fire source. An easy-access Test/Reset button also makes it possible to test the unit with the cover on. Additionally, three DIP switches can be used to configure field selectable settings: cover tamper delay, number of sensors to be controlled, and shut down on trouble option. Each power board also has two LEDs that can be used to indicate the status of connected sensors, and a quick reference imprinted on the cover explains the LED status indications (Standby, Maintenance, Trouble, and Alarm). Duct Smoke Detector can be customized to meet local codes and specifications without additional wiring.

Features:

•  4-Wire Photoelectric, integrated low-flow technology
• Air velocity rating from 100 ft/min to 4,000 ft/min (0.5 m/s to 20.32 m/sec)
• Versatile mounting options: square or rectangular while in configuration
• Plug-in sensor offers superb false alarm immunity and the latest sensor technology
• Broad ranges for operating temperature (–4°F to 158°F) and humidity (0% to 95% non-condensing)
• Patented sampling tube installs from front or back of the detector with no tools required
• Increased wiring space with a newly added ¾-inch conduit knockout
• One easy-access Test/Reset button and improved LED status
• Patented interconnect feature for multi-fan shutdown
• New high contrast terminal designations
• Built-in short circuit protection from operator wiring errors
• Field selectable settings for configuring the detector
• Two DPDT Form-C relay contacts
• 24 VAC/DC or 120 VAC
• Backward compatibility with existing Innovair products, including remote accessories

Specifications:

• Air Duct Velocity: 100 to 4000 ft./min. (0.5 to 20.32 m/sec)
• Alarm Current: 65 mA @ 24VDC 135 mA RMS @ 24VAC 60Hz 35 mA RMS @ 120VAC 60Hz
• Alarm Initiation Contacts: 2.0A @ 30 VDC (resistive)
• Response Time: 15 sec.
• Dimensions: Rectangular: 14.38 in (37 cm) L; 5 in (12.74 cm) W; 2.5 in (6.36 cm) D, Square: 7.75 in (19.7 cm) L; 9 in (22.9 cm) W; 2.5 in (6.36 cm) D
• Operating Humidity Range: 0% to 95% relative humidity non-condensing
• Operating Temperature Range: -4°F to 158°F (-20°C to 70°C)
• Power Supply Voltage: 20-29 VDC; 24 VAC, 50-60 Hz; 120 VAC 50-60 Hz
• Shipping Weight: 2.5 lbs. (1.14 kg)
• Storage Temperature: -22°F to 158°F (-30°C to 70°C)
• Voltage Range: 20-29 VDC; 24 VAC 50-60 Hz; 120 VAC 50-60 Hz