Results 1 to 4 of 4

Thread: exhaust fans

  1. #1
    Join Date
    Feb 2007
    Posts
    2

    exhaust fans

    recently found 3/4 hp motor with bad cap. got going. than found another with bad cap. same motor same age of motor, they were both replaced w/i 4 month. im wondering if the wrong size motors were used. fan is a vent pak style serving a chemical hood, belt driven.

  2. #2
    Join Date
    Jun 2001
    Location
    San Diego, CA
    Posts
    1,149
    were the motors amped out ok? do they operate in extreme conditions?
    Are the belts usually too tight, properly aligned? These are the chief reasons a motor dies
    prematurely.

  3. #3
    Join Date
    Aug 2006
    Posts
    2,594
    Probably the wrong motors. Motors for PRVs have an 1.15 to 1.25 service factor, some have fans inside the motor housing, very few have run capacitors. If you can tell me the Brand and M/n, I maybe able to come up with the correct motor ID and frame number.

  4. #4
    John Culpepper's Avatar
    John Culpepper is offline CHANGE YOUR EMAIL ADDRESS Professional Member*
    Join Date
    Oct 2007
    Location
    Austin Texas
    Posts
    1,776

    Smile

    Had similar problem on 2 of my downblast units, burned out the cap but not the motor. Turned out to be unit shaft bearings (units were of similar age) repaced blower shaft bearings and all good.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event