System Sensor® D4120A 4-Wire Photoelectric Duct Smoke Detector (Sampling Tube Sold Separately)4-Wire Photoelectric Duct Smoke Detector (Sampling Tube Sold Separately)

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Overview

The InnovairFlex D4120A 4-wire photoelectric duct smoke detector features a pivoting housing that fits both square and rectangular footprints and 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). 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

Features

Patented sampling tube installs from front or back of the detector with no tools required
Increased wiring space with a newly added 3/4 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
24V AC/DC or 120V AC
Backward compatibility with existing Innovair products, including remote accessories

Technical Information

Certifications:

UL/ULC
FM
CSFM

Physical Specifications

Size:
- Rectangular Dimensions: 14.38 in (37 cm) Length; 5 in (12.74 cm) Width; 2.5 in (6.36 cm) Depth
- Square Dimensions: 7.75 in (19.7 cm) Length; 9 in (22.9 cm) Width; 2.5 in (6.35 cm) Depth
Weight: 2.5 lbs (1.14 kg)
Operating Temperature Range: D4120A & D4SA: –20° to 70°C (–4° to 158°F)
Storage Temperature Range: D4120A & D4SA: –30° to 70°C (–22° to 158°F)
Operating Humidity Range: 0% to 95% relative humidity non-condensing
Air Duct Velocity: 100 to 4000 ft/min (0.5 to 20.32 m/sec)

Electrical Ratings

Power supply voltage: 20–29 VDC 24 VAC 50–60 Hz 120 VAC 50–60 Hz
Input capacitance: 270 µF max. 270 µF max. N/A
Reset voltage: 3.0 VDC min. 2.0 VAC min. 10 VAC min.
Reset time: (with RTS151KEYA) .03 to 0.3 sec. .03 to 0.3 sec. .03 to 0.3 sec.
Reset time: (by power down) 0.6 sec. max. 0.6 sec. max. 0.6 sec. max.
Power up time: 35 sec. max. 35 sec. max. 35 sec. max.
Alarm response time: 15 sec. 15 sec. 15 sec.
Sensitivity Test: See detector label See detector label See detector label
Current Requirements: (Using No Accessories)
Max. standby current: 21 mA @ 24VDC 65 mA RMS @ 24VAC 60Hz 20 mA RMS @ 120VAC 60Hz
Max. alarm current: 65 mA @ 24VDC 135 mA RMS @ 24VAC 60Hz 35 mA RMS @ 120VAC 60Hz

Contact Ratings

Alarm initiation contacts: (SPST) 2.0A @ 30 VDC (resistive)
Alarm auxiliary contacts: (DPDT) 10A @ 30 VDC (resistive); 10A @ 250 VAC (resistive); ½ HP @ 240 VAC ; ¼ HP @ 120 VAC
Note: Alarm auxiliary contacts shall not be connected to initiating circuits of control panels. Use the alarm initiation contact for this purpose.
Supervisory contacts: (SPDT) 2.0A @ 30 VDC (resistive); 2.0A @ 125 VAC (resistive)

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