31
2. Using a vacuum cleaner, clean compressed air, or a soft bris
-
tle 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.
6. Connect power to the duct detector then perform a sensor
alarm test.
Fig. 43 —
Sensor Cleaning Diagram
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 sensor 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 7.) 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.
An internal sensor fault is detected upon entering the trouble state:
• The contacts on the controller’s supervisory relay switch
positions. (See Fig. 44.)
• If a sensor trouble, the sensor’s Trouble LED the control
-
ler’s Trouble LED turn on.
• If 100% dirty, the sensor’s Dirty LED turns on and the
controller’s Trouble LED flashes continuously.
• If a wiring fault between a sensor and the controller, the
controller’s Trouble LED turns on but not the sensor’s.
Fig. 44 —
Controller Assembly
NOTE: All troubles are latched by the duct smoke detector. The
trouble condition must be cleared and then the duct smoke detec
-
tor must be reset in order to restore it to the normal state.
HVAC DUCT
SAMPLING
TUBE
RETAINER
CLIP
OPTIC
PLATE
OPTIC
HOUSING
SENSOR
HOUSING
AIRFLOW
ALARM
POWER
TEST/RESET
SWITCH
TROUBLE
RESET
ALARM
TROUBLE
POWER
Table 7 —
Detector Indicators
CONTROL OR INDICATOR
DESCRIPTION
Magnetic test/reset switch
Resets the sensor when it is in the alarm or trouble state. Activates or tests the sensor when it is in the normal state.
Alarm LED
Indicates the sensor is in the alarm state.
Trouble LED
Indicates the sensor is in the trouble state.
Dirty LED
Indicates the amount of environmental compensation used by the sensor (flashing continuously = 100%)
Power LED
Indicates the sensor is energized.
Summary of Contents for WeatherMaker 50TC 17-30 Series
Page 34: ...34 Fig 48 RTU Open Overlay for Economizer Wiring ...
Page 35: ...35 Fig 49 VFD Overlay for W2770 Controller Wiring ...
Page 80: ...80 Fig C 50TC 17 28 Control Wiring Diagram APPENDIX D WIRING DIAGRAMS ...
Page 81: ...81 Fig D 50TC 30 Control Wiring Diagram 208 230 3 60 Units APPENDIX D WIRING DIAGRAMS ...
Page 82: ...82 Fig E 50TC 30 Control Wiring Diagram 460 3 60 575 3 60 Units APPENDIX D WIRING DIAGRAMS ...
Page 83: ...83 Fig F 50TC 17 30 Power Wiring Diagram 208 230 3 60 Units APPENDIX D WIRING DIAGRAMS ...
Page 84: ...84 Fig G 50TC 17 30 Power Wiring Diagram 460 3 60 575 3 60 Units APPENDIX D WIRING DIAGRAMS ...
Page 89: ...89 Fig L 50TC PremierLink System Wiring Diagram APPENDIX D WIRING DIAGRAMS ...
Page 90: ...90 Fig M 50TC RTU Open Wiring Diagram APPENDIX D WIRING DIAGRAMS ...
Page 91: ...91 Fig N 50TC SAV VFD System Wiring Diagram APPENDIX D WIRING DIAGRAMS ...
Page 93: ......
