Page 1 of 2 12 LastLast
Results 1 to 13 of 22
  1. #1
    But when one quits working properly ... there are several reasons why this is happening.

    One is a pluged screen.
    Sometimes this occurs when an idiot replaces a compressor on a system which uses mineral oil and the new unit if filled with POE. This is something that happens in some of the markets I help take care of.

    We are on 22 and the new units are all filled with POE. So we drain the oil and fill em back up with Mineral before installing them.

    But whenever someone does NOT change that oil ... we have hell to pay.


    Another reason a valve fails to function ios when some guy comes along and turns the adjustment screw until it meets the stop .... THEN KEEPS ON TURNING!

    Then as Dave said in another thread, the valves fail to function when the power head loses it's charge. So the power head, in many cases, can be replaced and the valve returned to normal service.


    Anyone have anything to add to this assortment of observations?



  2. #2
    Join Date
    Sep 2001
    Location
    East Stroudsburg, PA
    Posts
    13,215
    If you keep them clean, and don't break them, they work fine. FOREVER.

    If you guys would bite the bullet for a couple weeks, and leave the POE in, your systems would be as clean as a whistle inside.

    So tell me, can you sleep in a compressor room????

  3. #3
    Join Date
    Jul 2001
    Location
    Gold Coast of Connecticut
    Posts
    4,619
    I was going to say I have never drained the POE from r-22 system compressors when i change them!

  4. #4
    Join Date
    Sep 2001
    Location
    East Stroudsburg, PA
    Posts
    13,215
    Originally posted by Freezeking2000
    I was going to say I have never drained the POE from r-22 system compressors when i change them!
    If it's a good customer that trusts my judgement, I'll run POE in any rack that needs cleaning, as part of a good maintenance program.

    Once I see that the crap has come out, I switch it to alkylbenzene on a 22, and Mineral on LT22.

    Everything else gets Aunt Polly's greasing formulae...

    Actually running POE in a LT22 rack for 2 years now, with absolutely zero oil problems. Was gonna convert to 404a, but the customer changed their mind when funds ran short.

    Of course, I run the suction header at 20 degrees SH on the dot, and the head stays between 140-160 psi...

    A little POE doesn't hurt a thing...

  5. #5
    Join Date
    Apr 2003
    Location
    the Great Pacific Northwest
    Posts
    607
    TXV's, one of the most reliable and yet misunderstood part of a refrigeration system. Just to sharpen up what are the 3 forces that operate a txv, and what is the function of the external equalizer and when is it used. If you really know, hold back and let the others take a stab at these questions.

  6. #6
    Join Date
    Apr 2002
    Location
    Dallas, TX
    Posts
    2,987
    Originally posted by R12rules
    Anyone have anything to add to this assortment of observations?
    Using too large a hammer...

  7. #7
    POE shouldn't be a problem with R22, but I can imagine a dirty system might complicate things. A few years ago we were shipping MO, AB and POE, and the decision to ship replacement Copeland compressors with POE was based on 1) the wholesalers' desire to reduce inventory and 2) the fact that POE was compatible with HFCs and HCFs. An existing R12 system would require an oil change, but everything else should be OK.

  8. #8
    Join Date
    Dec 2002
    Posts
    317

    Question sporlan>> txv's

    if your power-head loose its charge, why not change the entire valve??? How much $$$ are you saving by changing the power-head?? both suppliers in my area only stock the complete txv.

  9. #9

    Re: sporlan>> txv's

    Originally posted by uncle buck
    if your power-head loose its charge, why not change the entire valve??? How much $$$ are you saving by changing the power-head?? both suppliers in my area only stock the complete txv.
    A good parts house will order and stock whatever your little ol heart desires!


  10. #10
    Join Date
    Jul 2001
    Location
    Gold Coast of Connecticut
    Posts
    4,619
    Uncle i see it this way. I can pump down and isolte a circut, change a power head (on the fly at 1 to 5 psig)in say 15 mins even on a rack. I can pump down to 0 psig and recover to 10 hg so i wpnt get gased while sweating a new valve in then evacuate system. I think i would save the customer 200 to $300.00 by doing a powerhead on the fly and thats almost (99%)always what is wrong. You should get some 43 and 53 sporlan power heads and keep them on your truck if you do much refrigeration. You are doing the customer right!

  11. #11
    Join Date
    Sep 2001
    Location
    East Stroudsburg, PA
    Posts
    13,215
    Like, King said, Power elements are easier to replace. Much less labor intensive, and the case is back up a lot faster. They're also cheap.

    The savings in the potential product and sales loss alone should be a strong motivator to fix the problem, and not just change parts.

    Never heard of a supply house not stocking power elements.

    I'm thinking it's about 400 bucks less to do a head than a sweat valve, and probably about 200 less than a flare.

    [Edited by condenseddave on 05-04-2004 at 11:06 PM]

  12. #12
    Since we are talking about helping the customer here let me ask this. When a non-adjustable txv starts overfeeding on a Hussman Impact case, do you replace the valve or install a stem kit?

  13. #13
    Join Date
    Jan 2004
    Posts
    59
    Freezeking2000 Uncle i see it this way. I can pump down and isolte a circut, change a power head (on the fly at 1 to 5 psig)in say 15 mins even on a rack. I can pump down to 0 psig and recover to 10 hg so i wpnt get gased while sweating a new valve in then evacuate system. I think i would save the customer 200 to $300.00 by doing a powerhead on the fly and thats almost (99%)always what is wrong. You should get some 43 and 53 sporlan power heads and keep them on your truck if you do much refrigeration. You are doing the customer right!

    This is what I was meaning to say on a last post, hope this one does not bite me in the @ss...............

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