48TC

SD-TRK4 Remote Alarm Test Procedure

1.Turn the key switch to the RESET/TEST position for seven seconds.

2.Verify that the test/reset station’s Alarm LED turns on.

3.Reset the sensor by turning the key switch to the RESET/TEST position for two seconds.

4.Verify that the test/reset station’s Alarm LED turns off.

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. 24 and configured to operate the controller’s supervision relay. For more information, see “Changing sensor dirty test operation.”

12

 

 

 

1

 

 

Smoke Detector Controller

TB3

 

 

 

 

 

 

1

−

Auxiliary

 

 

 

 

2

+

equipment

 

 

3

14

 

 

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.

!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.)

Supervision relay

 

SD-TRK4

 

 

contacts [3]

 

 

Trouble

 

 

 

 

13

 

5

 

18 Vdc (

+)

Power

 

4

 

19

 

Wire must be

 

 

Alarm

added by installer

15

 

1

 

 

 

 

 

Reset/Test

23

18 Vdc (

−)

20

2

C08247

Sampling tube

Airflow

HVAC duct

Sensor housing

Optic plate

Retainer clip

Optic housing

Fig. 24 - Remote Test/Reset Station Connections

!CAUTION

OPERATIONAL TEST HAZARD

Failure to follow this caution may result in personnel 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 automatically go into the alarm state and activate all automatic alarm responses.

!CAUTION

OPERATIONAL TEST HAZARD

Failure to follow this caution may result in personnel 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.

C07305

Fig. 25 - 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 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

20

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Carrier 48TCA04---A12 appendix Detector Cleaning
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48TCA04---A12 specifications

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