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  1. #1
    wing's Avatar
    wing Guest

    head pressure control



    hi guys, Our air cooled condenser has 5no 2kw fans controlled via a step controller and pressure switch. As an upgrade we were thinking of installing a vfd and presure tranducer to control the head pressure. Is it wise to have 5 seperate vfd or just 1?regards Wing



  2. #2
    Join Date
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    Re: head pressure control

    Yes you will need 5 VFD's
    But before you do it, consult the experts in fans:

    http://www.ziehl-abegg.com/en/index.html

  3. #3
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    Re: head pressure control

    i would suggest one speed drive (danfoss akd type)or similar using a tranducer(sized accordingly).... then a change over relay controlled by a hp switch which will bring in your old step controller as a back up just in case ..... i use this system in all my packs .... great control with peace of mind...

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