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Hows It Work

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Rich Davis_2
Rich Davis_2 Member Posts: 117
in THE MAIN WALL
Just wonderin' what is used to sense the D/P when using a variable speed circ. ie: Alpha

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  • Mark Eatherton
    Mark Eatherton Member Posts: 5,853
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    Amperage...

    All things being equal, amperage is a point of reference and control on most ECM VS pumps on the market.



    There are some pumps on the market that can receive a 0 to 10 VDC control signal that can be generated by a DP control or a DT control.



    Bottom line, the DC ECM motors are MUCH more efficient than what is the norm, and throw in the ability to do VS, and you have the ultimate in wire to water efficiency with significant potential energy reductions to boot.



    ME
    It's not so much a case of "You got what you paid for", as it is a matter of "You DIDN'T get what you DIDN'T pay for, and you're NOT going to get what you thought you were in the way of comfort". Borrowed from Heatboy.
  • Rich Davis_2
    Rich Davis_2 Member Posts: 117
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    Not Quite What I'm Looking For

    Basically, what is used to montor the pressure?  Are there pressure transducers T'd into the supply and return, or is it done in some other way.  Thanks
  • CMadatMe
    CMadatMe Member Posts: 3,086
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    See if this

    Can help you out Rich. The link below has some nice info and I attached a white paper.

    http://net.grundfos.com/doc/webnet/poweredby/gpu/US/alpha2.html
    "The bitter taste of a poor installation remains much longer than the sweet taste of the lowest price."
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