EDWARDS SYSTEMS TECHNOLOGY IRC-3 Maintenance And Troubleshooting Manual page 10

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5. Replace screen by aligning arrow with the field test slot on the base
of the detector. Push screen gently into place; should fit tightly into
place.
6. Replace cover by gently turning cover clockwise until it locks into
place.
7. Test and verify detector operation.
8. When cleaning and testing has been completed, restore the zone or
system, verify proper operation and notify the proper authorities of
system restoration.
400 and 500 Series Ionization Smoke Detectors
Before cleaning, notify the proper authorities that the system is being
tested. Disable the zone or system to prevent undesirable, unwanted
alarms and proceed with testing and/or maintenance.
1. Remove detector cover by depressing the three lock prongs on top
of the cover and rotating the cover counter-clockwise.
2. Carefully remove the screen.
3. Clean screen thoroughly with a soft brush or vacuum. Screens on
the ionization unit may also be rinsed under clean warm water, then
dried thoroughly before re-assembly.
4. Brush or vacuum the inside area of cover, then remove any
remaining residue with cleaned compressed air: Do not apply water
to this area.
5. Vacuum sensing chamber before using cleaned compressed air to
remove remaining residual debris. Do not apply water to this area.
6. Press screen back into cover.
7. Replace detector cover and turn clockwise to lock into place.
8. Test detector and verify limits as per label on back of detector.
9. When cleaning and testing has been completed, restore the zone or
system, verify proper operation, and notify the proper authorities of
system restoration.
Aerosol Testing
Aerosol should not be used for testing; cigarette, wick or pipe smoke
are the only accepted methods. If aerosol testing must be used; it
should be used only as a go-no-go test and under no circumstances be
used to determine or to verify calibrated sensitivity. Canned aerosol is
not recommended since the use of these products may cause the plastic
to break down and deteriorate.
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Maintenance and Troubleshooting Manual