Table 3 – 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.

 

 

!CAUTION

OPERATIONAL TEST HAZARD

Failure to follow this caution may result in personnel 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 generating a false alarm.

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 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.

6.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 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:

SThe sensor’s Alarm LED and the controller’s Alarm LED turn on.

S The contacts on the controller’s two auxiliary relays switch positions.

S The contacts on the controller’s alarm initiation relay close.

S The controller’s remote alarm LED output is activated (turned on).

S 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:

50TC

Sampling tube

Airflow

HVAC duct

Sensor housing

Optic plate

Retainer clip

Optic housing

S A sensor’s cover is removed and 20 minutes pass before it is properly secured.

S A sensor’s environmental compensation limit is reached (100% dirty).

S A wiring fault between a sensor and the controller is detected.

An internal sensor fault is detected upon entering the trouble state:

S The contacts on the controller’s supervisory relay switch positions. (See Fig. 26.)

C07305

Fig. 25 - Sensor Cleaning Diagram

S If a sensor trouble, the sensor’s Trouble LED the controller’s Trouble LED turn on.

S If 100% dirty, the sensor’s Dirty LED turns on and the controller’s Trouble LED flashes continuously.

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Carrier 50TCA04-A07 appendix Normal State, Alarm State, Detector Indicators, Control or Indicator Description
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50TCA04-A07 specifications

The Carrier 50TCA04-A07 is a prominent model from Carrier, a leader in the heating, ventilation, and air conditioning (HVAC) industry. Designed for commercial applications, this unit exemplifies advanced technology and reliability, catering to a wide array of cooling needs.

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