Page 1 of 2 12 LastLast
Results 1 to 13 of 24
  1. #1

    Confused High side pressure fluctuates on new system.

    I just installed a new Goodman 13SEER 2.5Ton R410a (scroll) fixed orifice system with new air handler. Correct oriface was installed. Out side temp is 93F indoor is 73F. Low side pressue fluctuated 132-136psi. Low side temp is 58.6F giving me a superheat of 17.4. Calculated super heat is 14. Not far off. The high side is fluctuating from 450-650psi. I have not seen this before. I can hear the compressor labor at the higher pressure. My boss said not to worry about it unless the customer calls. I think the compressor may be damaged by this high pressure. Any thoughts out there?

  2. #2
    Join Date
    Jul 2010
    Location
    nebraska
    Posts
    1,629
    Shouldn't have anywhere near that high of head pressure with 93 ambient. If you weighed in the correct charge then check for non condensables.

  3. #3
    Join Date
    Jul 2007
    Location
    Delaware
    Posts
    3,824
    Might as well get some parts in stock now.
    Always here

  4. #4
    Join Date
    Feb 2009
    Location
    Tallahassee, FL
    Posts
    6,051
    You have a 5mm coil unit. You need to remove some.

  5. #5
    Join Date
    Nov 2007
    Location
    Mississippi
    Posts
    1,394
    Sounds like noncondensables to me. Did you pull deep vacuum? Microns?

  6. #6
    Join Date
    Jun 2012
    Location
    Minnesota
    Posts
    38
    Balance the charge, all I install is Goodman and I've seen this more times than I can count.
    Last edited by cavitech; 08-17-2012 at 11:08 PM. Reason: Suspect.

  7. #7
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    3,305
    Remove some and tell us what happens ....

  8. #8
    Join Date
    Nov 2011
    Location
    USA
    Posts
    402
    For that OD temp, the head pressure should be around 375 psi. Measure subcooling and see if it's not way high.

  9. #9
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    7,675
    Overcharged

  10. #10
    Join Date
    Dec 2008
    Location
    Ontario Canada
    Posts
    550
    Quote Originally Posted by socotech
    Sounds like noncondensables to me. Did you pull deep vacuum? Microns?
    I agree, first glance sounds like noncondensables

  11. #11
    Join Date
    Apr 2008
    Location
    Greenwood Lake, ny
    Posts
    50
    Not to sound stupid but from what i read he has a new 410a system and a new air handler,Shouldnt that be a txv not a fixed orifice.
    and did he change the filter drier as well

  12. #12
    Join Date
    Jun 2012
    Location
    East tx
    Posts
    164
    They ship systems with orifices and txvs. If was new system why wasn't the factory charge adequate?

  13. #13
    Join Date
    Dec 2010
    Location
    Palm Beach,Fl.
    Posts
    990
    If its a microchannel condenser the charge will be very light for even the shortest runs and in general will hold almost 20% less than a comparable tube/fin system when fully charged.
    Quote Originally Posted by k-fridge View Post
    The laws of physics know no brand names.

Page 1 of 2 12 LastLast

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