4-Wire Photoelectric Duct

Smoke Detector-D4240

The InnovairFlex? Series are the only duct smoke

detectors flexible enough to fit configurations from

square to rectangular and everything in between

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: square or rectangular 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 the front or back of the

detector with no tools required

? Increased wiring space with a newly added ?-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 240 VAC

? Backward compatibility with existing Innovair products, including

remote accessories

The InnovairFlex D4240 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 operates 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 ?-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 D4240 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, enabling

the fire location to be pinpointed.

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 are NOT a substitute for open

area smoke detectors; NOT a substitute for early warning detection;

NOT a replacement for a building’s regular fire detection system.

S911 3029700 Refer to NFPA 72 and 90A for additional information.