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  1. #1
    Join Date
    Oct 2009
    Location
    Los Angeles
    Posts
    4

    looking for inverter 24v AC to 24v DC

    Recently I worked with McQuay water source HP DC board.
    Since new board is too expensive, I decided using relays for over 30 units repairing.
    There is a problem on heating mode with DC solenoid reversing valve.
    So I need an inverter AC to DC but I can't find the inverter on internet.

    Is here anybody where I can buy the inverter 24V AC to 24V DC.

  2. #2
    Join Date
    Jun 2006
    Location
    New Jersey
    Posts
    4,289
    Just go to Radio Shack and pickup a bridge rectifier.

    Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

  3. #3
    Join Date
    May 2009
    Location
    Bardstown, KY
    Posts
    94
    Try Kele.com

  4. #4
    Join Date
    Jan 2007
    Location
    NH
    Posts
    236
    Make sure your rectifier has higher amps rating than your total load ( bigger rectifiers need heatsink)

  5. #5
    Join Date
    Dec 2004
    Location
    Caledonia WI
    Posts
    877
    And don't forget the voltage drop across the rectifier when choosing the transformer.

  6. #6
    Join Date
    Jan 2007
    Location
    NH
    Posts
    236
    5000uF capacitor on DC side will fix it.

  7. #7
    Join Date
    Oct 2009
    Location
    Los Angeles
    Posts
    4
    Thanks everybody,
    You guys push me into new electronic field!
    Even though I am interested in making inverter with bridge rectifier and capacitor, I don't have enough time.
    As following mark_ballard's link, I found exact inverter what I want.
    For someone who has same problem with me, I copied the link below.
    http://www.kele.com/Power-Supplies/DCP-1-5-W.aspx

  8. #8
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    17,020
    An "inverter" changes DC to AC.

    You want a rectifier.

    Instead, get the right parts for the equipment.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  9. #9
    Join Date
    Oct 2009
    Location
    Los Angeles
    Posts
    4
    Thanks. I didn't know that.

  10. #10
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,319
    Quote Originally Posted by timebuilder View Post
    An "inverter" changes DC to AC.

    You want a rectifier.

    Instead, get the right parts for the equipment.
    That makes too much sense
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    It was working when I left...
    Liberalism-Ideas so good they mandate them

  11. #11
    Join Date
    Nov 2004
    Location
    up in the hizzy
    Posts
    1,291
    Quote Originally Posted by timebuilder View Post
    An "inverter" changes DC to AC.

    You want a rectifier.

    Instead, get the right parts for the equipment.
    They dont make parts for those old McQuay anymore, I had retrofitted some old DC units with new Mark IV board and reversing valve, its time consuming and the parts aren't cheap, I thought about using an inverter, rectifier or whatever but found a place locally that rebuilds the old boards.
    while the old units ran for 30+ years, we are having all sorts of problems with the newest models.

  12. #12
    Join Date
    Oct 2009
    Location
    Los Angeles
    Posts
    4
    Quote Originally Posted by valdelocc View Post
    They dont make parts for those old McQuay anymore, I had retrofitted some old DC units with new Mark IV board and reversing valve, its time consuming and the parts aren't cheap, I thought about using an inverter, rectifier or whatever but found a place locally that rebuilds the old boards.
    while the old units ran for 30+ years, we are having all sorts of problems with the newest models.
    Actually I have 35 McQuay units have run over 25 years.
    Lots of problems were there, drain, compressor, reversing valve, board, gas leaking, fan motor...etc....
    All most I fixed them. Two units were changed with new carrier units.
    I hope that I can fix heating problem using by "rectifier" or "KELE module".

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