Fire-X Duct Detector Connections

In a recent post I showed how to properly connect an addressable fire alarm monitor module to the DH100ACDCLP System Sensor duct detector.  I am now going to display how to connect to a Fire-X conventional 4-wire duct smoke detector.  The concept is the same for all conventional duct detectors.  Connect directly to the fire alarm contact terminals (N.O.) and jumper your electrical resistor throught the supervisory contacts (N.C.).  (Most conventional duct detector supervisory contacts are shown in the non-powered up state)  This way an open circuit will not prevent the duct detector from sending an alarm signal in an alarm condition.

Also please note that it is not a good habit to have the electrical contractor power up conventional duct smoke detectors with 120VAC.  The only way to reset these types of devices is to power them down momentarily.  This is why its a good idea to use the resttable power (24VDC) from the fire alarm control panel.  If 120VAC is used you will spend a great deal of time running around looking for breakers to flip before you can clear the alarm.

Take a look at this low voltage wiring diagram of the propoer connections of an addressable fire alarm monitor module to a Fire-X duct detector.

Fire X DD