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What happens when you run a 240V motor at 120V

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Comments

  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 9,309

    Be very careful, that motor looks like it is made with Chineseium. (it's on the periodic table right after JUNK) Do you have a problem with having a licensed electrician do wiring for you? I'm sure that there is a way to get the job done properly even without a set of stamped plans by a mechanical engineer. I think that the electrician can get it right with just pulling a permit.

    Just Sayin'

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • ratio
    ratio Member Posts: 3,777

    Perhaps Google can find you a 120V 60Hz version of that same motor?

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,388

    That motor is rated at 50Hz. Not going to work in this country.

  • ChrisJ
    ChrisJ Member Posts: 16,280
    https://forum.heatinghelp.com/discussion/comment/1803115#Comment_1803115

    Won't it just spin faster?

    Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,388

    Probably overheat and burn up would be my guess. $$$ for a VFD control LOL

  • DCContrarian
    DCContrarian Member Posts: 664
    https://forum.heatinghelp.com/discussion/comment/1803067#Comment_1803067

    I've been thinking about that. The model is YDK-20-4Z. The YDK series motors seem to be used in a lot of minisplits and room air conditioners, you see them in equipment from Carrier and Trane. The 20 is the wattage, this is a 20-watt motor, the YDK-32 32-watt motor seems to be the most popular variant. I don't know what the 4Z means, but I suspect that since it's a 4-speed motor that's what the 4 is. That's what I've been able to decipher. I know that there are 120V versions of YDK motors, here's one that looks like it would be a drop-in replacement, except it's only 16W: https://rhnewtons.com/product/ydk-16-4-l1-fan-motor-115v-60hz-16w-0-35a/

    This one is 20W but is YDKS, I think the extra S is for "short," the output shaft looks shorter:

    https://rhnewtons.com/product/ydks-20-4-fan-motor-110-120v-60hz-20w-0-25a/

    So if I could figure out a part number I could probably find it. At the same time, a transformer is about the same cost as a new motor.

  • Jamie Hall
    Jamie Hall Member Posts: 24,719

    The 50 hz thing may or may not be a problem. Probably not. The motor will run slightly faster.

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,388

    Probably cost more than it's worth in gadgets to get it running

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