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  1. 13-10-2010, 08:37 PM #1
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    moondawn
    moondawn is offline Veteran Poster
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    Differential pressure switch testing them?

    hi all

    could anyone tell me the best way of testing these if you think one may be acting faulty.

    i know they have the two tubes one for example on one side of a fan and one on the other side. from removing the tubes from the switch. My question is should the tube before the fan be sucking and the tube after the fan be blowing/

    i was trying to test one on site today but unsure?

    cheers lee
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