Fan wires help! which is which yellow, blue , red , & black

Discussion in 'The Projects Forum' started by joulian, Dec 19, 2009.

  1. joulian

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    Aug 27, 2009
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  2. studiot

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    Nov 9, 2007
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    What did you intend to use it for? You probably don't need the other connections, they will be for speed control via sensors.
     
    Last edited: Dec 20, 2009
  3. joulian

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    Aug 27, 2009
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    Well i put it on a 110v to 24v transformer .40amps
    but its not turning on fan when i connect the +/-

    I noticed the fan uses 24-60v
    and has a .48amps rating. But I figured that was using its max volts of say 60.

    Hmmm

    I was thinking it might be some speed control also....
    but what with a rheostat?
     
  4. joulian

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    Aug 27, 2009
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    Solar furnace. Blow hot air from it into garage.
     
  5. Paragon

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    Dec 8, 2009
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    Is that a 24V AC or DC output transformer? The fan runs off DC.
     
  6. studiot

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    Doesn't your fan spec sheet say DC?
     
  7. bertus

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  8. joulian

    Thread Starter Active Member

    Aug 27, 2009
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    Yes AC to DC

    I don't understand why its not turning on.

    I connected the +/- to the transformer and even touched the blue and yellow to one another ( if it is a sort of switch it should have worked).
     
  9. eng1ne

    Member

    Dec 4, 2009
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    The input power = 23.52 W @ 48 V (the rated input).

    By P = V.I, I = P/V = 23.52/48 = 0.49 A

    However, at 24 V, I = 23.52/24 = 0.9 A

    And at 60 V, I = 23.52/60 = 0.39 A

    The quoted values are at rated input voltage, as is quoted on the fourth note right on the bottom of the page.
     
  10. hgmjr

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    Jan 28, 2005
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    Joulian,

    As others have mentioned, I believe you have a 48V fan. I think you will need to apply 48 volts to get the fan operating. Once it is operating, I think you will find that the yellow and blue wires are the collector and the emitter of a sensor transistor. This transistor is there to permit the monitoring of the motor's speed.

    hgmjr
     
  11. joulian

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    Aug 27, 2009
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    Ahhhh man, I was afraid this was going to be the reason. I asked the guy at the store if it would work. He said yes, i bought it from surpluscenter.com.

    Ok I just looked for a 48v transformer on that site above.
    Any suggestions? on what to do. I am going over my budget on this entire project. :(
     
  12. joulian

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    Aug 27, 2009
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  13. hgmjr

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  14. eng1ne

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    Dec 4, 2009
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    hgmjr, the fan that you have suggested requires 1.1 A @ 24 V dc; some 0.6 A over joulian's power supply.
     
  15. hgmjr

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    Jan 28, 2005
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    Eng1ne,

    Good point. It seems that in order to use the 24 volt fan mentioned in the earlier post, a transformer with a higher power rating will need to be acquired.

    hgmjr
     
  16. joulian

    Thread Starter Active Member

    Aug 27, 2009
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    hmmmm man.
    Any site suggestions like the one i used that would have a good deal on one?
     
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