Carrier 50TCQD17-D24 Service And Maintenance Instructions page 32

Remote Test/Reset Station Dirty Sensor Test
The test/reset station dirty sensor test checks the test/reset
station's ability to initiate a sensor dirty test and indicate
the results. It must be wired to the controller as shown in
Fig. 47 and configured to operate the controller's
supervision relay. For more information, see "Changing
the Dirty Sensor Test."
NOTICE
OPERATIONAL TEST NOTICE
Failure to follow this NOTICE can result in an
unnecessary evacuation of the facility.
If the test/reset station's key switch is left in the
RESET/TEST position for longer than seven seconds,
the detector will automatically go into the alarm state
and activate all automatic alarm responses.
Fig. 47 - - Remote Test/Reset Station Connections
NOTICE
OPERATIONAL TEST NOTICE
Failure to follow this NOTICE can result in an
unnecessary evacuation of the facility.
If the smoke detector is connected to a fire alarm
system, first notify the proper authorities that the
detector is undergoing maintenance then disable the
relevant circuit to avoid generating a false alarm.
NOTICE
OPERATIONAL TEST NOTICE
Failure to follow this NOTICE can result in an
unnecessary evacuation of the facility.
Holding the test magnet to the target area for longer
than seven seconds will put the detector into the alarm
state and activate all automatic alarm responses.
Dirty Sensor Test Using an SD- - TRK4:
1. Turn the key switch to the RESET/TEST position for
two seconds.
2. Verify that the test/reset station's Trouble LED
flashes.
Table 11. Detector Indicators
CONTROL OR
INDICATOR
Magnetic
test/reset switch
Alarm LED
Trouble LED
Dirty LED
Power LED
Detector Cleaning
Cleaning the Smoke Detector:
Clean the duct smoke sensor when the Dirty LED is
flashing continuously or sooner if conditions warrant.
1. Disconnect power from the duct detector then remove
the sensor's cover. See Fig. 48.
2. Using a vacuum cleaner, clean compressed air, or a
soft bristle brush, remove loose dirt and debris from
inside the sensor housing and cover. Use isopropyl
alcohol and a lint- - free cloth to remove dirt and other
contaminants from the gasket on the sensor's cover.
3. Squeeze the retainer clips on both sides of the optic
housing then lift the housing away from the printed
circuit board.
4. Gently remove dirt and debris from around the optic
plate and inside the optic housing.
5. Replace the optic housing and sensor cover.
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6. Connect power to the duct detector then perform a
sensor alarm test.
Sampling
tube
Airflow
Fig. 48 - - Sensor Cleaning Diagram
32
DESCRIPTION
Resets the sensor when it is in the alarm or
trouble state. Activates or tests the sensor
when it is in the normal state.
Indicates the sensor is in the alarm state.
Indicates the sensor is in the trouble state.
Indicates the amount of environmental
compensation used by the sensor
(flashing continuously = 100%)
Indicates the sensor is energized.
HVAC duct
Sensor
housing
Optic
plate
Retainer
clip
Optic
housing
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