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Thread: head pressure control
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26-04-2009, 06:55 PM #1
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
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26-04-2009, 07:34 PM #2
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
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29-04-2009, 02:11 PM #3
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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