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  1. #1
    Join Date
    May 2009
    Location
    The Pas, Manitoba Canada
    Posts
    231

    museum condenser motor hunt

    I have an old condenser that I can't find fan motors that will last. Condenser model # RDD-95xA (pretty sure). Bohn/Blanchard born in 1975. Original motor numbers are obsolete. Tried Marathon X507, Fasco T2537 no luck. All specs. for the new motors same as old except the old motors are lots heavier and lasted 30 years. Don't think there's a power supply problem. Is there a motor out there that can last or do I have to up the hp. Bearings OK. Motors <seize> when power supplied.
    1 HP
    850 RPM
    208/230 V
    3 PH

  2. #2
    Join Date
    Jan 2008
    Posts
    127

  3. #3
    Join Date
    Apr 2001
    Location
    Over Here
    Posts
    1,105
    If the condenser is that old, is there a chance it is not rejecting heat as well, and restricting airflow, causing the motor to bake itself?

    Maybe the condenser should be a fixture inside the museum, and not serving it?

  4. #4
    Join Date
    May 2009
    Location
    The Pas, Manitoba Canada
    Posts
    231
    3 of the motors died @ +5 degrees F. ambient but yes would answer both questions.

  5. #5
    Join Date
    Jul 2009
    Location
    Connectitaxed
    Posts
    2,644
    Did you check the incoming voltage to the motor? Amp draw? Do you have the make and model # of the original motor?

  6. #6
    Join Date
    Jul 2005
    Location
    Southern California
    Posts
    596
    Is the blade original or has it been changed as well?

  7. #7
    We use a motor rebuild supply house and they always weigh the motor when matching/replacing discontinued motors, not just matching specs. Not sure why though.

  8. #8
    Join Date
    Jul 2009
    Location
    texas
    Posts
    49
    try the a.o smith jauggernaut it has higher operating temps due to its designed for vfd use and i belive bigger bearings it is base or belly band mount check your blades are they the correct ones make shure the blades arent too heavy as the mass could be causing premature wear on the bearings also balancing is an issue as well i use an outfitt called Nortex fan they can balance inverted blowers and anything else ive ever been able to take him

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