Page 1 of 2 12 LastLast
Results 1 to 13 of 22

Thread: turbo trouble

  1. #1
    Join Date
    May 2008
    Location
    Clovis/Fresno CA
    Posts
    256
    Post Likes

    turbo trouble

    Turbo aire. TST72sd
    long story short evaporator had a leak replaced evaporator capillary tube clogged week later. Changed with supco #3 52" cap tube.. Charged with 19oz. 134a. Unit. Still in at 10hg suction and 110 liquid Box temp 70. Changed spun copper filter blew system out with co2 appeared no clogs...... any advice on next step would be greatly appreciated...

  2. #2
    Join Date
    Aug 2013
    Location
    Omaha
    Posts
    949
    Post Likes
    Is that OEM size or did u convert it?
    Maybe try OEM tube or get exact OEM size

  3. #3
    Join Date
    Aug 2013
    Location
    Omaha
    Posts
    949
    Post Likes
    Oh...in case I forgot...turbo aire is absolute crap. Lol

  4. #4
    Join Date
    Aug 2002
    Location
    Southold.calm
    Posts
    6,833
    Post Likes
    Quote Originally Posted by UmmScott View Post
    Oh...in case I forgot...turbo aire is absolute crap. Lol
    There all crap!

    Is the cap tube bonded to the suction line?


    Replace the suction line / cap tube assembly.
    Refrigeration Hardware Supply or Case Parts can supply it.

  5. #5
    Join Date
    May 2008
    Location
    Clovis/Fresno CA
    Posts
    256
    Post Likes
    this is what you are URI suggested (conversion)....Case has a backorder? Guess ill wait
    Tube not bonded coiled up 2 part.......

  6. #6
    Join Date
    Mar 2009
    Posts
    12
    Post Likes
    Your best bet is replacing a compressor and cap tube, if you go only with cap tube you be back to that call in future. Go with Oem size, I know some of turbo air have metric size cap tubes.

  7. #7
    Join Date
    Jan 2015
    Posts
    4
    Post Likes
    What is turbo air and its use?

  8. #8
    Join Date
    Jan 2015
    Posts
    4
    Post Likes
    I'm going to school at this time to get my certificate in HVAC.

  9. #9
    Join Date
    Jan 2015
    Location
    Indiana
    Posts
    54
    Post Likes
    I do not trust R134a, especially used with cap tubes. In fact one of my schools' food service director asked me for a recommendation of a new pass thru cooler, I advised her NOT R134a.

    The issue as taught by Sporlan, is that the POE oil used with R134a breaks down into a waxy substance to clog the cap tube. Replace a clogged cap tube, and/or some torch heat melts the wax, and soon back in a clogged cap tube. Sporlan sells a series of filter driers with a designation of "...-HH". The smallest is bigger than is needed on a cooler such as Turboair, so you willl need to adjust refrigerant level.

    Oh, and warn your customer about the wax/cap tube clog AND that it will cause the compressor to run hot which aggravates the wax, and DOES shorten compressor life. (If you replace the cap tube then soon you may face a dead compressor and unhappy customer if you do not warn them.) I have lost count of how many school type milk cooler cap tube and compressor changes I have done. I ALWAYS put in the Sporlan -HH.

    Caliboy, Turbo Air is a reach in low budget cooler or freezer, used in commercial kitchens.

  10. #10
    Join Date
    Jun 2003
    Location
    Chicago, IL
    Posts
    4,715
    Post Likes
    If you had a leaking evap there is probably water in the oil and it's freezing at the cap tube outlet. That's why it seems fine when you purge with CO2 and is restricted when running. Change the compressor oil and install an oversized real filter dryer (not spun copper)

  11. #11
    Join Date
    Aug 2013
    Location
    Omaha
    Posts
    949
    Post Likes
    Yup don't use those crappy copper driers...use a quality sporlan HH Capt drier as stated

  12. #12
    Join Date
    May 2014
    Location
    Bay Area California
    Posts
    2,760
    Post Likes
    Yup, HH drier. Making sure the cap tube is not plugged. On those little units, I always charge through the high side and be sure the suction comes up. More so on the quick down and dirty repairs.

    Likely the compressor is still functional if it's pulling down to 10"hg.

    Haven't heard about the waxy thing with POE and 134a, interesting. But have never had a problem, and I see a fair amount of True and Turbo Air boxes running 134a.

  13. #13
    Join Date
    Dec 2005
    Posts
    88
    Post Likes
    If the manufacturers would have put TXV's on these crap 134 systems we probably would not be dealing with this curse. Oh well job security.

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
  •  

Related Forums

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