Maintenance, Recommended Service Schedule

The smoke detector contains a photoelectric detector approved for an extended air speed range of 100 to 4000 feet per minute and an operational temperature range of -4_to 158_F. Do not operate the smoke detector out of these ranges.

The smoke detector operates on 24 vac, 120 vac, or 220/240 vac. The thermostat power terminals on the unit are used to power the smoke detector.

The cover of the controller contains the Alarm, Trouble, Dirty and Power LEDs. The cover of the sensor contains the Alarm, Trouble and Power LEDs. (See Fig 2.)

The smoke detector can be reset by a momentary power interruption, by the reset button on the front cover, by the control panel, or by the remote reset accessory.

RETURN SENSOR

CONTROL MODULE

J1	J1
S	J2
S	E

RETURN SENSOR	CONTROL MODULE
J1	J1
S	J2
S	E
	SECURE FROM BEHIND
	WITH SCREW
	TERMINAL STRIP

C07182

Fig. 11 ---Sensor Installation

3.Squeeze the retainer clips on both sides of the optic hous- ing 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.

Recommended Service Schedule

SVisually inspect each sensor connected to the controller upon installation and once every 6 months thereafter.

SPerform a sensor alarm test on each sensor connected to the controller upon installation and once every 12 months thereafter.

SPerform a sensor dirty test upon installation and once every 6 months thereafter or more frequently, as conditions warrant.

Sensor Tests

Sensor Alarm Test

The sensor alarm test checks a sensor’s ability to signal an alarm state. This test requires the use of a SD-MAG test magnet.

IMPORTANT: This test places the duct detector into the alarm state. Unless part of the test, disconnect all auxiliary equipment from the controller before performing the test. If duct detector is connected to a fire alarm system, notify the proper authorities before performing the test.

To perform a sensor alarm test:

1.	Hold the test magnet where indicated on the side of the
	sensor housing for seven seconds. Verify that the sensor’s
	Alarm LED turns on.
2.	Reset the sensor by holding the test magnet against the
	sensor housing for two seconds. Verify that the sensor’s

CRSMK

Sampling

tube

Airflow

HVAC duct

Sensor housing

Optic plate

Retainer

clip

Optic housing

Alarm LED turns off.

Sensor Dirty Test

The sensor dirty test provides an indication of the sensor’s ability to compensate for gradual environmental changes. A sensor that can no longer compensate for environmental changes is considered 100% dirty and requires cleaning or replacing. This test requires the use of a SD-MAG test magnet.

To perform a sensor dirty test, hold the test magnet where indicated on the side of the sensor housing for seven seconds. Verify that the sensor’s Dirty LED flashes.

IMPORTANT: Holding the test magnet against the sensor housing for longer than 7 seconds will put the duct detector into the alarm state and activate all automatic alarm responses.

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Fig. 12 ---Sensor Cleaning Diagram

MAINTENANCE

IMPORTANT: Notify the proper authorities that the smoke detector system is undergoing maintenance, and that the system will temporarily be out of service. Disable the zone or system undergoing maintenance to prevent unwanted alarms and possible dispatch of the fire department.

Cleaning Procedure

1.Disconnect power from the duct detector then remove the sensor’s cover.

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. (See Fig 12.)

Use isopropyl alcohol and a lint-free cloth to remove dirt and other contaminants from the gasket on the sensor’s cover.

The sensor’s Dirty LED indicates the results of the dirty test as shown below.

FLASHES

DESCRIPTION

10 to 25% dirty. This is typical on a newly installed duct detector.

226 to 50% dirty

351 to 75% dirty

476 to 99% dirty

Controller Tests

Controller Alarm Test

The controller alarm test checks the controller’s ability to initiate and indicate an alarm state.

48/50PG20-28, 48/50HG014-028 specifications

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