Mircom D4120 Innovairflex 4 Wire Photoelectric Duct Detector Owner’s Manual

: June 9, 2024
: Mircom

Table of Contents

Mircom D4120 Innovairflex 4 Wire Photoelectric Duct Detector
Description
Features
Architectural/Engineering Speciﬁcations
Wiring for 4-wire Duct Smoke Detector and Accessories
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Mircom D4120 Innovairflex 4 Wire Photoelectric Duct Detector

Mircom D4120 Innovairflex 4 Wire Photoelectric Duct
Detector

Description

The InnovairFlex D4120 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 (non- condensing). 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. The InnovairFlex housing provides ample wiring space, a ¾-inch conduit knockout, and built-in short circuit protection to prevent damage to sensitive components during installation. High contrast terminal designations make wiring easy. With its 2:1 sensor-to-power capability, the power board of the D4120 may be used to monitor a second sensor, D4S, simultaneously (i.e., supply and return side). As many as 50 InnovairFlex detectors can be interconnected. When one unit senses smoke, all interconnected detectors will switch their relays; only the detector sensing smoke will go into alarm, thus pinpointing the ﬁre source. An easy-access Test/Reset button makes it possible to test the unit with the cover on. 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 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). The InnovairFlex duct smoke detector can be customized to meet local codes and speciﬁcations without additional wiring. The new InnovairFlex product line is compatible with all previous Innovair models, including remote test accessories.
WARNING: Duct smoke detectors have speciﬁc limitations.

DUCT SMOKE DETECTORS ARE:

NOT a substitute for an open area smoke detector,
NOT a substitute for early warning detection, and
NOT a replacement for a building’s regular ﬁre detection system. Refer to NFPA 72, 90A and CAN/ULC S524 for additional duct smoke detector application information.

Features

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 in square or rectangular conﬁguration with modular construction
Plug-in sensor offers superb false alarm immunity and the latest sensor technology
Broad ranges for operating temperature (-4ºF to 158ºF) 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

Architectural/Engineering Speciﬁcations

The air duct smoke detector shall be a System Sensor InnovairFlex™ D4120(A) Photoelectric Duct Smoke Detector. The detector housing shall be UL listed per UL 268A or ULC listed speciﬁcally for use in air handling systems. The ﬂexible housing of the duct smoke detector ﬁts both square and rectangular footprints. The detector shall operate at air velocities of 100 ft/min to 4000 ft/min (0.5 m/sec to 20.32 m/sec). The unit shall be capable of controlling up to 50 air handling systems when interconnected with other detectors. The detector shall be capable of providing a trouble signal in the event that the front cover is removed. It shall be capable of local testing via magnetic switch or remote testing using the RTS451KEY(A) remote test station. Terminal connections shall be of the strip and clamp method suitable for 12–18 AWG wiring.

Wiring for 4-wire Duct Smoke Detector and Accessories

Mircom D4120 Innovairflex 4 Wire Photoelectric Duct Detector
1

NOTE 1: 24V Power Inputs accept a non-polarized 24VDC or 24VAC 50-60Hz. 120VAC Power Inputs accept only 120VAC 50-60Hz. Connect power source to appropriate terminals of each detector. See speciﬁcations for additional power supply information.
NOTE 2: Auxiliary contacts shown in standby position. Contacts switch during alarm as indicated by arrows. Auxiliary contacts are not to be used for connection to the control panel. See speciﬁcations for contact ratings.
NOTE 3: Supervisory contacts shown in standby position. Open contacts indicate a trouble condition to the panel. See speciﬁcations for contact ratings.
NOTE 4: Alarm Initiation contacts shown in standby position. Closed contacts indicate an alarm condition to the panel. See speciﬁcations for contact ratings.
*Please refer to the corresponding installation manual for accessory wiring diagrams.

Accessory Current Loads at 24 VDC

Device| Standby| Alarm
RA100Z| 0 mA| 12 mA Max.
RTS151| 0 mA| 12 mA Max.
RTS151KEY| 12 mA| 12 mA Max.
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 RTS451)| .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
Physical Specifications

Size: (Rectangular)| 14.38 in (37 cm) Length; 5 in (12.7 cm) Width;

2.5 in (6.36 cm) Depth

Size: (Square)| 7.75 in (19.7 cm) Length; 9 in (22.9 cm) Width; 2.5 in (6.35 cm) Depth
Weight:| 2.5 lb (1.14 kg)
Operating Temp. Range:| D4120 & D4S: -4°F to 158°F (-20°C to 70°C)
D4P120: -40°F to 158°F ) -40C° to 70°C)
Storage Temp. Range:| D4120 & D4S: –22°F to 158°F (–30° to 70°C)
D4P120: -40°F to 158°F ) -40C° to 70°C)
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)
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)
Model| Description
---|---
D4120| 4-wire photoelectric low-flow duct smoke detector
Accessories
D4S| 4-wire photoelectric sensor component only
D4P120| 4-wire photoelectric power board component only, 24 VAC/DC, 120 VAC
2D51| 4-wire conventional photoelectric sensor head
DST1| Metal sampling tube duct width up to 1ft (0.3m)
DST1.5| Metal sampling tube duct widths 1 ft to 2 ft (0.3 to 0.6 m)
DST3| Metal sampling tube duct widths 2 ft to 4 ft (0.6 to 1.2 m)
DST5| Metal sampling tube duct widths 4 ft to 8 ft (1.2 to 2.4 m)
DST10| Metal sampling tube duct widths 8 ft to 12 ft (2.4 to 3.7 m)
ETX| Metal exhaust tube duct width 1ft (0.3m)
RA-100Z| Remote annunciator alarm LED
RTS151| Remote test station
RTS151KEY| Remote test station with key lock