SMOKE DETECTORS:

SMOKE DETECTORS

Photocell detectors smoke detection system. They operate the fan motor controls and other devices, follow these steps:

Turn off the system
Power off the fan, close to outdoor air and return air dampers and works
Start fresh air blower, open the outside air dampers, near the back of the air valve, and stop the return of the-air or exhaust fans
Start fresh air blower, open the outside air dampers, near the back of the air dampers and run return-air or exhaust air fan

Triggering occurs when the smoke inside the device exceeds the density that is sufficient to obscure the light 2 times or by 4% on each leg. The key switch is used for testing. Two detectors are used. One is in recirculated air section. The other is located in the blower section downstream of the air filters...

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SMOKE DETECTORS