Controls/003 Smoke Detector.pdf

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From:   Jim Ziaukas

Sent:    Monday, October 23, 2000 10:57 AM

To:       Billy Anderson; Bob Oakley; Chad Koepke; Clay Brown; David Ament; Eulle Rushton; farooq; Greg Saxon; Hal Holloway; Jim Lang; Jim Ziaukas; Karl Vanky; Keith Clay; Lewis Watford; Michael Warren; Mike Mehrvarz; Ricky Teal; Robert Lawson; Ron Eberhart; Saibal Sengupta; Shawn Nassiri; Todd Smith

Subject:   (3) SMOKE DETECTOR

When a unit requires a smoke detector, the smoke detector head and the sampling tube and relief port should all be mounted in the treated airstream. They should also be mounted in the same (relative) temperature airstream. This is to prevent condensation in the tubes and in the detector head. Avoid mounting the head in a stagnant area, such as a control panel or vestibule. These areas will be different in temperature from the sampling tube airstream and will cause condensing to occur. A hinged access must be provided for the detector head for service/reset purposes. If a half-door is adequate for a particular application, it's use is acceptable. The door must be shown on the Dimensional Data drawing created by the Project Engineer. Allow (1) door per dectector. The door does not have to be dedicated. That is, if the section where the detector head already has a door for some other purpose an additional door is not necessary.