23
Remote Test/Reset Station Dirty Sensor Test
The test/reset station dirty sensor test checks the test/reset sta
-
tion’s ability to initiate a sensor dirty test and indicate the re
-
sults. It must be wired to the controller as shown in Fig. 44 and
configured to operate the controller’s supervision relay. For
more information, see “Dirty Sensor Test” on page 22.
Fig. 44 —
Remote Test/Reset Station Connections
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.
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. 45.
Fig. 45 —
Sensor Cleaning Diagram
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.
4. Lift the housing away from the printed circuit board.
5. Gently remove dirt and debris from around the optic plate
and inside the optic housing.
6. Replace the optic housing and sensor cover.
7. Connect power to the duct detector then perform a sensor
alarm test.
Indicators
NORMAL STATE
The smoke detector operates in the normal state in the absence
of any trouble conditions and when its sensing chamber is free
of smoke. In the normal state, the Power LED on both the sen
-
sor and the controller are on and all other LEDs are off.
ALARM STATE
The smoke detector enters the alarm state when the amount of
smoke particulate in the sensor’s sensing chamber exceeds the
alarm threshold value. (See Table 4.) Upon entering the alarm
state:
• The sensor’s Alarm LED and the controller’s Alarm LED
turn on.
• The contacts on the controller’s two auxiliary relays switch
positions.
• The contacts on the controller’s alarm initiation relay
close.
• The controller’s remote alarm LED output is activated
(turned on).
• The controller’s high impedance multiple fan shutdown
control line is pulled to ground Trouble state.
The SuperDuct™ duct smoke detector enters the trouble state
under the following conditions:
• A sensor’s cover is removed and 20 minutes pass before it
is properly secured.
• A sensor’s environmental compensation limit is reached
(100% dirty).
• A wiring fault between a sensor and the controller is
detected.
IMPORTANT: Failure to follow this ALERT 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 acti
-
vate all automatic alarm responses.
IMPORTANT: Failure to follow this ALERT 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.
IMPORTANT: Failure to follow this ALERT 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.
1
12
14
13
19
15
2
20
3
RESET/TEST
TROUBLE
POWER
ALARM
5
4
1
3
2
SD-TRM4
2
1
TB3
18 VDC (-)
18 VDC (-)
+
−
SUPERVISION
RELAY
CONTACTS [3]
WIRE MUST BE
ADDED BY
INSTALLER
SMOKE DETECTOR
CONTROLLER
AUXILIARY
EQUIPMENT
HVAC DUCT
SAMPLING
TUBE
RETAINER
CLIP
OPTIC
PLATE
OPTIC
HOUSING
SENSOR
HOUSING
AIRFLOW
