Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

York RTU

Unknown
Unknown
in THE MAIN WALL
Tom,

first things first, remove the belt then hook the motor leads up to the main terminal bar. Then go from there

Comments

  • Tom_5
    Tom_5 Member Posts: 3
    York RTU

    I am having problems w/ a York RTU. I replaced the blower motor, 480V 3 phase, because it was overamping and making a loud bellowing noise. I replaced it w/ an identical motor and when I turned it on, I'm getting the same thing w/ the new motor. (Motor has been in the shop for about 8 years, so its not new, but never been used) I replaced the blower contactor (2 pole). Each leg is getting the correct voltage. 480 across each 3 and 280 each leg to ground. 2 legs come from the contactor, 1 leg comes from a compressor contactor (always hot). I cannot believe that the second motor is bad, just seems to coincidential that the new motor is doing the same thing the old one was.
    I'll add that it is a belt driven motor and it is doing this without a load.
    Any suggestions or help would be appreciated
    Go Buckeyes
  • JimGPE_3
    JimGPE_3 Member Posts: 240
    Some ideas:

    Are the fan bearings bad?

    Try this: Take the drive belts off and run the motor. See if the motor still makes the noise. Then try spinning the fan wheel by hand - with the belts still disconnected. Watch for "flat" spots in the rotation, and listen for noise. Sometimes bad bearings will give you a thump at the same spot on each rotation

    See if there is any play in the fan shaft bearings - shake it by hand.

    I suspect you have bad fan bearings. The increased friction would be enough to overload your motor.

    Not sure what you mean by one leg comes from a compressor contactor and is always hot. Seems strange....
This discussion has been closed.

Categories