![Carrier 48LC 14 Скачать руководство пользователя страница 20](http://html1.mh-extra.com/html/carrier/48lc-14/48lc-14_service-and-maintenance-instructions_2561045020.webp)
20
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 con
-
tinuously or sooner if conditions warrant.
1. Disconnect power from the duct detector then remove the
sensor’s cover. (See Fig. 25.)
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. 25 — 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 3.) 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. 26.)
• 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.
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.
Fig. 26 — Controller Assembly
IMPORTANT: Failure to follow this notice may result in per
-
sonnel and authority concern.
If the test/reset station’s key switch is left in the RESET/TEST
position for longer than seven seconds, the detector will auto
-
matically go into the alarm state and activate all automatic
alarm responses.
IMPORTANT: Failure to follow this notice may result in per
-
sonnel and authority concern.
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 notice may result in per
-
sonnel and authority concern.
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 generat
-
ing a false alarm.
HVAC DUCT
SAMPLING
TUBE
RETAINER
CLIP
OPTIC
PLATE
OPTIC
HOUSING
SENSOR
HOUSING
AIRFLOW
ALARM
POWER
TEST/RESET
SWITCH
TROUBLE
RESET
ALARM
TROUBLE
POWER
Содержание 48LC 14
Страница 27: ...27 Fig 38 Integrated Gas Control IGC Board RED LED STATUS...
Страница 81: ...81 Fig B Typical Electromechanical Control Wiring Diagram 48LC 14 26 APPENDIX D WIRING DIAGRAMS...
Страница 82: ...82 Fig C 48LC 14 26 Systemvu Control Schematic APPENDIX D WIRING DIAGRAMS...
Страница 83: ...83 Fig D 48LC 14 26 RTU Open Control Wiring Diagram APPENDIX D WIRING DIAGRAMS...
Страница 85: ......