Results 1 to 7 of 7

Thread: NOP

  1. #1
    Join Date
    Apr 2003
    Location
    New York
    Posts
    700

    NOP

    Just curious i had a fellow tech tell me that he had an 70# net oil psi. Today
    My response was did u calibrate your gauges?? And he was working on an rack system.Now , i think i remember some where that u cant have and net oil that high?? i am researching this nowto see if i could find anything on internal relief on compressor(copeland) Have any of u guys seen such high net oil psi??? any replies are thanked in advance.

  2. #2
    Join Date
    Aug 2007
    Location
    Winter Haven, FL
    Posts
    4,361
    Yes..there was a bunch of build-up in the oil system

  3. #3
    What points did he hook up to?
    Was it a Carlyle Compound?

  4. #4
    Join Date
    Apr 2003
    Location
    New York
    Posts
    700
    Quote Originally Posted by smilies View Post
    What points did he hook up to?
    Was it a Carlyle Compound?
    regular rack ,copland compressor.he says he was at the suction and pump discharge

  5. #5
    Join Date
    Apr 2003
    Location
    New York
    Posts
    700
    Quote Originally Posted by Joe Harper View Post
    Yes..there was a bunch of build-up in the oil system
    huh

  6. #6
    Join Date
    Aug 2007
    Location
    Winter Haven, FL
    Posts
    4,361
    You get a coating of what looks like burned up oil on the insides of the pump discharge line. All that pressure is squeezed into a smaller tube than normal. Saw it on an r22 low temp compressor where the demand cooling seloniod had failed.

  7. #7
    Join Date
    Jun 2005
    Location
    Las Vegas NV
    Posts
    1,152
    Quote Originally Posted by jaybee View Post
    Just curious i had a fellow tech tell me that he had an 70# net oil psi. Today
    My response was did u calibrate your gauges?? And he was working on an rack system.Now , i think i remember some where that u cant have and net oil that high?? i am researching this nowto see if i could find anything on internal relief on compressor(copeland) Have any of u guys seen such high net oil psi??? any replies are thanked in advance.
    jaybee,

    The oil pump bypass valve should open at 60 psi. There could be blockage causing the higher pressure or the guages could be off.

    Check out bulletin 4-1166 at this link.

    http://www.hvacrinfo.com/ae_index.htm

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