Controls/002 Airflow Switch.pdf

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From:Jim Ziaukas

Sent:   Monday, March 13, 2000 4:23PM

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

Subject:   (2) CONTROLS---AIRFLOW SWITCH

An airflow proving switch is required in each air handler. We have had instances where the customer requests the proving of airflow through the use of a current transformer, which measures current draw to the fan motor. If a customer requests this (or any other) means of proving airflow other than an airflow proving switch, call out an airflow proving switch in addition to the other device. The standard airflow proving switch will be wired in series with the device requested by the customer.

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