Results 1 to 8 of 8
  1. #1
    Join Date
    Jun 2012
    Location
    Northeast
    Posts
    615
    Post Likes

    Question Pum Down Settings AC

    Wondering what you guys set your low pressure switch at for R-22 and R410-A. Cut in and Cut out

  2. #2
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    24,404
    Post Likes
    Quote Originally Posted by Push It View Post
    Wondering what you guys set your low pressure switch at for R-22 and R410-A. Cut in and Cut out
    The ambient conditions play a big part of it!

  3. #3
    Join Date
    Jun 2012
    Location
    Northeast
    Posts
    615
    Post Likes
    Thread Starter
    Quote Originally Posted by pecmsg View Post
    The ambient conditions play a big part of it!
    Could you explain? Are you referring to the the units available condenser space?

  4. #4
    Join Date
    Jan 2010
    Posts
    17,350
    Post Likes
    Are you using it as a safety or freeze protection ?
    Oh wait you said Pump Down correct ?
    Which gas because pressures matter ?

  5. #5
    Join Date
    Jun 2012
    Location
    Northeast
    Posts
    615
    Post Likes
    Thread Starter
    Quote Originally Posted by VTP99 View Post
    Are you using it as a safety or freeze protection ?
    Oh wait you said Pump Down correct ?
    Which gas because pressures matter ?
    Yes pump down. I have only dealt with R-22 units that I see a pump down on. Haven’t seen a 410A System yet with a pump down. But wondering on both.

    I am wondering more for larger tonnage units that have reciprocating compressor with pressure unloading cylinders.

  6. #6
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    7,947
    Post Likes
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  7. #7
    Join Date
    Apr 2003
    Location
    St. Louis
    Posts
    1,251
    Post Likes
    What type of compressor scroll or recip? Scroll wouldn't have any. Recip 35 with 20ld diff.

  8. #8
    Join Date
    Mar 2015
    Location
    Medford, N.Y.
    Posts
    5,856
    Post Likes
    Quote Originally Posted by servicefitter View Post
    What type of compressor scroll or recip? Scroll wouldn't have any. Recip 35 with 20ld diff.
    Why would that be? I have done a lot ever since they have been on the market. And that even includes when Cope did not put in an internal check valve in the Scroll and I had to install an external check valve. That was way back when the Scroll 1st came out.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •