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  1. Thanks for everyone's input. I thought I would...

    Thanks for everyone's input. I thought I would let you know what happened.

    I decided to install a TXV but after I made that decision, I could not find a location for the valve in the evaporator...
  2. I suppose that a txv that equalizes the pressure...

    I suppose that a txv that equalizes the pressure during off cycles is one that will not shut off completely.

    I have been looking for an AEV but since I am using MP66 I run the low side at a little...
  3. One must imagine that it is doing a pretty good...

    One must imagine that it is doing a pretty good job if it works to repair a condenser leak.

    I have never used JB Weld though I have heard lots about it. I work with a group of mechanics and the...
  4. The thing I like about an AEV (or TXV for that...

    The thing I like about an AEV (or TXV for that matter) is that it gives me some adjustment room. It is hard to tweek the operation with a cap tube and I doubt that I would get it right the first...
  5. A1 Burt; I was thinking that I didn't want to...

    A1 Burt; I was thinking that I didn't want to mess around with another cap tube since my current one is not working well and I thought I might as well upgrade the system while I had everything apart....
  6. I was thinking of using an AEV since the cooling...

    I was thinking of using an AEV since the cooling load is very constant and there is not an easy place to attach a TEV bulb. I would think that the AEV keeping the evaporator pressure constant would...
  7. Are you saying this because of the acid in the...

    Are you saying this because of the acid in the oil? I used Nu-Calgon's Phase III test kit and the color band turned completely clear. I don't know how much acid this indicates but the instructions...
  8. That's a good idea--I will look into this. ...

    That's a good idea--I will look into this.

    Thanks.
  9. Cap tube to Auto expansion valve--good/bad idea?

    Hi, I have this little 1/3 HP 1500 BTU freezer that I have been fooling around with. It was originally designed to use R12 with cap tube metering. I have changed it to MP66 refrigerant. I got it...
  10. Thread: AB Oil Odor?

    by glaird
    Replies
    9
    Views
    1,189

    Time flies... Just to let the previous posters...

    Time flies...
    Just to let the previous posters know, I finally had time to attend to this freezer and to check the oil for acid content. I got a Calgon Phase III acid test kit and drained some of...
  11. Thread: AB Oil Odor?

    by glaird
    Replies
    9
    Views
    1,189

    mmmdave is right, MP66 does go below atmosphere...

    mmmdave is right, MP66 does go below atmosphere at -20 F. With a leak of refrigerant, the supply to the evaporator (via a cap tube) probably was reduced and that probably reduced the low side...
  12. Thread: AB Oil Odor?

    by glaird
    Replies
    9
    Views
    1,189

    Thanks for your reply Mikep. The odor is more...

    Thanks for your reply Mikep.

    The odor is more like a latex paint smell than a solvent based smell like lacquer thinner. The smell is not really strong--it is sort of like being near a can of...
  13. Thread: AB Oil Odor?

    by glaird
    Replies
    9
    Views
    1,189

    AB Oil Odor?

    Hi,
    I am repairing a small 1/3 HP freezer that uses MP66 refrigerant with AB oil. It failed due to a refrigerant leak on the low side so I am sure that some amount of air was sucked into the...
  14. Replies
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    2,607

    In my circumstance described above, I just got...

    In my circumstance described above, I just got another service value and brazed it in. I looked around for teflon packing rope and didn't find any easily available.

    After I took the packing nut...
  15. Replies
    23
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    2,696

    Jim, I did add an extra ounce to compensate for...

    Jim,
    I did add an extra ounce to compensate for the 032 filter over the copper spun filter. That may not be enough. The unit didn't work initially so I didn't know what the R12 values should have...
  16. Replies
    23
    Views
    2,696

    Thanks to everyone for their help and advice. ...

    Thanks to everyone for their help and advice.

    Just for everyone's information, I cut 2" off the cap tube and resoldered it back into the 1/4 stub that is connected to the output of the liquid...
  17. Replies
    23
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    2,696

    It takes about 6 minutes to get within 15 PSI of...

    It takes about 6 minutes to get within 15 PSI of equalization. So, it is slow.
  18. Replies
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    Views
    2,696

    I didn't know about the scoring method. I tried...

    I didn't know about the scoring method. I tried various other techniques that didn't work very well. I finally bought this little tool for cutting cap tubes--it has a blade somewhat like a wire...
  19. Replies
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    2,696

    That's a pretty nice chart! I haven't seen that...

    That's a pretty nice chart! I haven't seen that before.

    Thanks!
  20. Replies
    23
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    2,696

    The filter had SAE flare fittings on both ends so...

    The filter had SAE flare fittings on both ends so I just disconnected the in/out piping and installed a new filter. I did install a Parker Gold Label Liquid Line Dryer LLD series size 032 as you...
  21. Replies
    23
    Views
    2,696

    I will check tomorrow morning. I have watched it...

    I will check tomorrow morning. I have watched it equalize but I haven't timed it--I would guess some few minutes.

    I will find out and let you know.
  22. Replies
    23
    Views
    2,696

    The new compressor did come with AB oil. I...

    The new compressor did come with AB oil. I called the factory to check on that. When I had it all apart, I ran some nitrogen through the cap tube. I put 100 PSI at the input and I saw there was...
  23. Replies
    23
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    2,696

    I thought of this at the time but since the...

    I thought of this at the time but since the compressor failed by "failing to pump though it was running" I thought there wouldn't be much external problems. That may have been wrong.
  24. Replies
    23
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    2,696

    Compressor running hot?

    I have this ice cream vending machine that I am repairing. People on this forum have been very helpful with advice along the way. I have a couple of more questions. I have made a guess as to the...
  25. Replies
    34
    Views
    2,567

    Thanks for the clarification.

    Thanks for the clarification.
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