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  1. Thread: pump down

    by Flip14
    Replies
    7
    Views
    1,006

    Yes. After you take out dries you assume to be...

    Yes. After you take out dries you assume to be plugged up, try to blow through them.
  2. Thread: R-22 pressures

    by Flip14
    Replies
    13
    Views
    1,416

    A hot pull down is when the conditioned space is...

    A hot pull down is when the conditioned space is warmer than normal operating conditions. Even it the sun is hitting the condensing unit your head pressure should only be 30 degrees above ambient...
  3. Thread: R-22 pressures

    by Flip14
    Replies
    13
    Views
    1,416

    True and good point. I would categorize that as...

    True and good point. I would categorize that as acting as a hot pull down but regardless it does cause high head pressure.
  4. Thread: Weird Problems

    by Flip14
    Replies
    2
    Views
    554

    Weird Problems

    Just want to ask a question. What are some of the crazy problems you all have seen while in this field of work?

    Today I found a unit with a bad compressor. Compression ratio was very low and the...
  5. Thread: R-22 pressures

    by Flip14
    Replies
    13
    Views
    1,416

    Sub cool and superheat? Only three real problems...

    Sub cool and superheat? Only three real problems that cause high head pressure: dirty coil, over charge, or non-condenseables. At 87 degrees ambient your head pressure should be around 260psig (when...
  6. Replies
    16
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    1,396

    Yes. You can take your piston out of the fitting...

    Yes. You can take your piston out of the fitting and then put it back together. Weld on a txv outside the coil, insulate the liquid line out of the txv AND the txv body itself because it will...
  7. Replies
    57
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    6,063

    I agree, I meet way too many people that think...

    I agree, I meet way too many people that think they have it all figured out. I like this site and learn from it as well. No one likes a smart***, you all can call me out if I ever do.
  8. Replies
    57
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    6,063

    Your temp of your refrigerant will be warmer than...

    Your temp of your refrigerant will be warmer than the ambient air so unless you are sending your liquid line a very very long ways through a space that is warmer than the ambient air it will actually...
  9. Replies
    57
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    6,063

    This is a common installation manual that I find...

    This is a common installation manual that I find with all the condensing units I install. Has lots of good info such as line set sizing, flooded condenser charging, and lots of other good stuff. Of...
  10. Replies
    57
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    6,063

    I don't know what to tell you then. The units I...

    I don't know what to tell you then. The units I usually put in are Russell, climate controll, bohn.
  11. Replies
    57
    Views
    6,063

    They usually maintain a head pressure around...

    They usually maintain a head pressure around 180psig. They are used in what we call a flooded condenser.
  12. Replies
    57
    Views
    6,063

    A head master is a valve that controls your head...

    A head master is a valve that controls your head pressure in low ambient conditions by letting hot gas bypass the condenser and go into the receiver.
  13. Replies
    57
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    6,063

    Most people don't even open the installation...

    Most people don't even open the installation manual of a new condensing unit. But it's in there. As a matter of fact there is a lot of useful info in those manuals such as how to size your line set...
  14. Replies
    57
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    6,063

    All the units I've ever installed that run a...

    All the units I've ever installed that run a flooded condenser have a additional charge chart in the installation manual. If charging when it's hot or just mild outside your supposed to charge to a...
  15. Thread: moisture?

    by Flip14
    Replies
    16
    Views
    1,467

    No, that would have symptoms of a restriction.

    No, that would have symptoms of a restriction.
  16. Replies
    57
    Views
    6,063

    Most walk ins have txv's so even if your sub...

    Most walk ins have txv's so even if your sub cooling goes down, say its 110 degrees outside, your txv's should compensate for that. It's job is to maintain a superheat. In my experience I've found...
  17. Replies
    57
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    6,063

    When I'm looking at my readings my superheat is...

    When I'm looking at my readings my superheat is always more important than my sub cooling. This is because sub cooling can fluctuate according to ambient conditions. Copeland recommends 20 degrees...
  18. Replies
    18
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    1,823

    From my experience there are really only three...

    From my experience there are really only three problems with compressor windings: open, shorted, or grounded. I have always thought I was finding the resistance of the actuall winding itself but I...
  19. Thread: Walk in Freezer

    by Flip14
    Replies
    28
    Views
    2,446

    If the mfg said 10 then I would set it at 10. I...

    If the mfg said 10 then I would set it at 10. I usually shoot for 5psig for the cut out, gives me a good buffer to make sure I don't hit 0psig. I set the differential at 15-20 (cut in 20-20psig).
  20. Thread: moisture?

    by Flip14
    Replies
    16
    Views
    1,467

    I have seen it one time. The unit ran for a day...

    I have seen it one time. The unit ran for a day and a half without shutting off. But yes very seldom will it freeze up because of an overcharge, it has to run for a while.
  21. Replies
    5
    Views
    794

    I usually try to flush until no more junk comes...

    I usually try to flush until no more junk comes out. In this case I'm usually trying to get all the old residual oil out of the system because of acid or something like that. I'm not too sure about...
  22. Thread: moisture?

    by Flip14
    Replies
    16
    Views
    1,467

    This does not make sense to me. 3 degrees of...

    This does not make sense to me. 3 degrees of super heat is very low. A starved evap would have a high superheat because the coil does not have enough refrigerant in it therefore it boils off too soon...
  23. Thread: Walk in Freezer

    by Flip14
    Replies
    28
    Views
    2,446

    Hence the reason I said "in case a leak develops...

    Hence the reason I said "in case a leak develops on the low side".
  24. Thread: moisture?

    by Flip14
    Replies
    16
    Views
    1,467

    Not nessaceraily, especially if your duct work is...

    Not nessaceraily, especially if your duct work is in poor shape. I'm assuming that you check your temps at the return and supply in the house. If possible check them at the air handler. The easiest...
  25. Replies
    4
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    939

    I usually use tin snips. It's not exactly easy to...

    I usually use tin snips. It's not exactly easy to cut but I don't trust my steadiness with a grinder, especially around a coil.
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