Technical Bulletin
6
SuperDuct Conventional Two-Wire Duct Smoke Detector
Wiring
Figure 8 and Figure 9 show how to wire the duct smoke
detector and its accessories. The duct smoke detector’s IDC
wiring differs depending on the control panel’s short circuit
current specification. Run all field wiring into the detector
through the knockouts located at the top of the detector
housing.
Caution:
Incorrectly wiring the duct smoke detector to the
control panel’s IDC circuit can damage the equipment.
Maintenance and service
Recommended service schedule
Perform a visual inspection upon installation and once every
six months thereafter.
Perform an alarm test upon installation and once every twelve
months thereafter.
Testing the duct smoke detector
Before testing the duct smoke detector, notify the proper
authorities that the system is undergoing maintenance and,
unless part of the test, disconnect all auxiliary equipment from
its common alarm relay contacts.
Note:
You can’t initiate an alarm test if the duct smoke
detector is in the trouble state.
To test the duct smoke detector’s ability to report an alarm
condition:
•
Using an SD-MAG, hold the SD-MAG where indicated
on the side of the duct smoke detector for more than 5
seconds
•
Using an SD-TRK, turn the key switch to the TEST
position for more than 5 seconds
•
Using an SD-TRM, hold the SD-MAG test magnet to the
target area for more than 5 seconds
Once activated, verify the following:
•
The detector’s Alarm LED is on
•
If connected, the Alarm LED on the remote test station or
LED indicator is on
•
The appropriate event message or visual indication is
reported on the fire alarm control panel
After you have finished testing the duct smoke detector, reset
the control panel in order to restore the detector to its normal
state.
Troubleshooting
You can troubleshoot problems while the duct smoke detector
is in operation. However, be careful not to place the duct
smoke detector in the alarm state since the procedure for
troubleshooting and alarming the detector is similar.
Caution:
Before troubleshooting the duct smoke detector,
notify the proper authorities that the fire alarm system is
undergoing maintenance and take steps to prevent the control
panel from responding to a false alarm.
To test whether a trouble is present:
•
Using an SD-MAG, hold the SD-MAG where indicated
on the side of the duct smoke detector for 1 to 4 seconds
•
Using an SD-TRK, turn the key switch to the TEST
position for 1 to 4 seconds
•
Using an SD-TRM, hold the SD-MAG test magnet to the
target area for 1 to 4 seconds
If a trouble exists, the duct smoke detector’s Trouble LED will
flash once. The most common troubles are described below.
Problem Solution
The cover is not properly
secured
Make sure the cover is
attached and secured properly
then reset the control panel
The detector is greater than
100% dirty
Clean the duct smoke detector
then reset the control panel
Note:
After correcting a problem, test the detector again to
verify the problem was solved.
If securing the cover and cleaning the detector did not fix the
problem, you should replace the duct smoke detector’s printed
circuit board (model number SD-2WPCB, ordered separately.)
If the duct smoke detector is normal (not in trouble), the Dirty
LED flashes as shown below.
Flashes Description
1
0 to 24% dirty (typical on a newly installed duct
smoke detector)
2
25 to 49% dirty
3
50 to 74% dirty
4
75 to 99% dirty
Cleaning the duct smoke detector
Clean the duct smoke detector when it becomes 75% to 99%
dirty or sooner if conditions warrant.
