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

Thread: bayberien help!

  1. #1
    Join Date
    Jul 2012
    Posts
    11

    Confused bayberien help!

    Iam a HVAC contractor owner operator.The unit is a 134a little bayberien TXV valve system box sticker is scratched off so i dont know factory charge the condenser was changed 2 months ago by another company #m2fl-ao25-iaa-020.The call complaint was not cooling and when i got there the evap coil was iced up.so the first thing i check evap fan motor was working and is.than check for defrost heater and is none or defrost timer but has a tstate so is it a air defrost??So than i defrosted the coil and put my gauges on it my lowside was like 20 degrees evap temp and highside was 90 degrees so i tried to add a little because it should be alest 50 psi acording to my pt chart 134a and evap temp stayed the same but my compressor temp climbed.so i check compressor amps.
    The RLA on comp is 4.9 and it was at 6.4 amps and would not change as i charged so i think its the txv valve? but not sure please help

  2. #2
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,512
    Quote Originally Posted by nixcool View Post
    Iam a HVAC contractor owner operator.The unit is a 134a little bayberien TXV valve system box sticker is scratched off so i dont know factory charge the condenser was changed 2 months ago by another company #m2fl-ao25-iaa-020.The call complaint was not cooling and when i got there the evap coil was iced up.so the first thing i check evap fan motor was working and is.than check for defrost heater and is none or defrost timer but has a tstate so is it a air defrost??So than i defrosted the coil and put my gauges on it my lowside was like 20 degrees evap temp and highside was 90 degrees so i tried to add a little because it should be alest 50 psi acording to my pt chart 134a and evap temp stayed the same but my compressor temp climbed.so i check compressor amps.
    The RLA on comp is 4.9 and it was at 6.4 amps and would not change as i charged so i think its the txv valve? but not sure please help
    Sure about that?
    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

  3. #3
    Join Date
    Jul 2012
    Posts
    11
    Iam new to this site soo how much?

  4. #4
    Join Date
    Sep 2010
    Location
    Western, MO
    Posts
    871
    I have no idea what the charge would be, but if your not going to diagnose and repair your problem you might as well fill it till it's full.

    And I think your PT chart is broke.

    jim
    Common sense isn't very common anymore.

  5. #5
    Join Date
    Jun 2012
    Posts
    116
    I'd probably fire the unit up, and charge as much liquid into the suction port as possible, it should bring those compressor amps right down...

  6. #6
    Join Date
    Jul 2012
    Posts
    11
    I tried filling the system but the evap temp stays the same 20 to 25 degrees ang comp pressure just keeps going up and it does have a sight glass and when i first got there it was clear like it was full with no bubbles and when i shut it off i saw the oil pass threw.so what should be evap temp fully charged with the box temp say at 65 degrees?or it could be t-state causing icing?

  7. #7
    Join Date
    Jul 2012
    Posts
    11
    really i never heard of sending liquid through the suction line, wont that hurt the compressor??

  8. #8
    Join Date
    Jun 2012
    Posts
    116
    If the sight glass was full and you knew it was a TXV system, why would you add charge to try to change your superheat? Makes about as much sense as giving the compressor a good drink of liquid

  9. #9
    Join Date
    Jan 2010
    Posts
    6,095
    Hold on now..... these guys are just toying with you. That's just there nature don't take it personal. They know that you have little experience from what you have said. Slow down a little and give them some info they can work with. Have you ever done refrigeration before ?

  10. #10
    Join Date
    Jul 2012
    Posts
    11
    Yes i have but not an expert with small refridgeration mostly central a/c systems

  11. #11
    Join Date
    Jun 2012
    Posts
    116
    Alright, assuming you're a contractor, it sounds like there was a defrost problem, but now there is also an overcharge problem. You should probably charge based on subcooling, which will mean reading a P/T chart, as well as the proper use of manifold gauges. You're probably going to need to recover refrigerant, and I would aim for 5 degrees of subcooling on that unit. If there still are problems, then you should start investigating TXV issues causing a low evaporator temp

  12. #12
    Join Date
    Sep 2010
    Location
    Western, MO
    Posts
    871
    Quote Originally Posted by VTP99 View Post
    Hold on now..... these guys are just toying with you. That's just there nature don't take it personal. They know that you have little experience from what you have said. Slow down a little and give them some info they can work with. Have you ever done refrigeration before ?


    Read the start of this thread http://hvac-talk.com/vbb/showthread.php?t=158850 and then load us up with the info.

    jim
    Common sense isn't very common anymore.

  13. #13
    Join Date
    Jul 2012
    Posts
    11
    Ok now when iam checking line temp for subcooling i should be taking that temp as closest to my compressor?and iam a license contractor trying to expand for more work.

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