Figure 10. Testing detector alarm: |
| Figure 11. Detector head removal: | |
| DETECTOR |
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| HEAD |
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| DETECTOR |
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| HEAD |
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| TWIST |
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| COUNTERCLOCKWISE |
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| TO REMOVE |
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| DUCT |
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| HOUSING |
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TEST | TEST | RESET |
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MAGNET |
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LOCATOR |
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LOCATOR | PAINTED SIDE |
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| TOWARD HOUSING |
| DUCT |
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| HOUSING |
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| TWIST |
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| CLOCKWISE |
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| TO INSTALL |
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[6.1] Smoke Entry Tests
[6.1.1] Air Flow
To verify sufficient sampling of ducted air, use a manometer to measure the differential pressure created from air flow across the sampling tubes. The pressure should measure no less than 0.01 inches of water and no greater than 1.20 inches of water.
[6.1.2] Smoke Response
To determine if smoke is capable of entering the sensing chamber, visually identify any obstructions. Plug the ex- haust and inlet tube holes to prevent ducted air from car- rying smoke away from the detector head, then blow smoke such as cigarette, cotton wick, or punk directly at the head to cause an alarm. REMOVE THE PLUGS AFTER TESTING OR THE DETECTOR WILL NOT FUNCTION PROPERLY.
[6.1.3] Filter Replacement
The filters do not substantially affect smoke behavior even when they are up to 90% clogged. Quarterly visual inspection is usually often enough to determine if filters should be replace because only a high percentage of con- tamination affects duct detector performance.
[6.2] Standby, Alarm, And Sensitivity Tests [6.2.1] Standby And Trouble
Standby- Check for the presence of the blinking red LEDs (blinks about every 10 seconds) through the transparent housing cover. If the APA451 ac- cessory is used, its green Power LED should be illuminated continuously.
Trouble- If the detector LEDs do not blink or if the APA451 Power LED is not illuminated, the detector lacks power (check wiring, panel, or power supply), the head is missing (install), or the unit is defec- tive (return for repair).
Test- The trouble condition can be caused intentionally to verify correct operation of the system. Remove power to the unit, remove the detector head (see Figure 11), or place the M02-
[6.2.2] Alarm Tests
[6.2.2.1]
1.Place the painted surface of the magnet into the Test locator molded into the side of the housing (see Figure 10).
2.The red alarm LEDs on the detector should latch on, as should any accessories (PA400, RA400Z, RTS451, APA451). Verify auxiliary functions (such as fan shut- down) and system control panel alarm status.
3.Place the painted surface of the magnet into the Reset locator molded into the side of the housing (see Figure 10). This should clear the latched alarm condition at the detector. If a system control panel is used, the panel may also require resetting.
[6.2.2.2] RTS451/RTS451KEY Remote Test Station The RTS451/RTS451KEY Remote Test Station facilitates test of the alarm capability of the duct detector as indicated in
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