looking for inverter 24v AC to 24v DC
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  1. #1
    Join Date
    Oct 2009
    Location
    Los Angeles
    Posts
    8

    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
    4,325
    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
    881
    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
    8
    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
    17,731
    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
    8
    Thanks. I didn't know that.

  10. #10
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,498
    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

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  11. #11
    Join Date
    Nov 2004
    Location
    up in the hizzy
    Posts
    1,375
    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
    8
    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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