Search:

Type: Posts; User: Flip14

Search: Search took 0.01 seconds.

  1. Thread: pump down

    by Flip14
    Replies
    7
    Views
    1,057

    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
    1,527

    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
    1,527

    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
    577

    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
    1,527

    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
    Views
    1,492

    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
    Views
    6,501

    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
    Views
    6,501

    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
    Views
    6,501

    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
    Views
    6,501

    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
    6,501

    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
    6,501

    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
    Views
    6,501

    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
    Views
    6,501

    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
    1,550

    No, that would have symptoms of a restriction.

    No, that would have symptoms of a restriction.
  16. Replies
    57
    Views
    6,501

    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
    Views
    6,501

    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
    Views
    1,922

    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
    2,616

    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
    1,550

    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
    846

    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
    1,550

    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
    2,616

    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
    1,550

    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
    Views
    1,004

    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.
  26. Replies
    18
    Views
    1,922

    I agree, I don't think that compressor windings...

    I agree, I don't think that compressor windings are wound to an exact resistance.
  27. Thread: moisture?

    by Flip14
    Replies
    16
    Views
    1,550

    Restriction doesn't make sense to me because of...

    Restriction doesn't make sense to me because of your low superheat. Moisture doesn't make sense either, it usually freezes up at the coil first. My firsts thoughts would be bad air flow (dirty evap,...
  28. Thread: Walk in Freezer

    by Flip14
    Replies
    28
    Views
    2,616

    Also you don't want your low pressure cut out...

    Also you don't want your low pressure cut out below 0psig in case a leak develops on the low side. You would suck air/moisture in the system every time it pumps down.
  29. Thread: Walk in Freezer

    by Flip14
    Replies
    28
    Views
    2,616

    The whole point of a pump down system is to get...

    The whole point of a pump down system is to get all the liquid out of the evap and prevent refrigerant migration to the compressor during the off cycle. I usually shoot for around 5psig and set a...
  30. Replies
    5
    Views
    846

    I have had luck with sealers. They tell you on...

    I have had luck with sealers. They tell you on the box on what size leak it will seal. The main thing I have used sealer in is ice machines with a leak in the evaporater. In some application they are...
  31. Replies
    5
    Views
    689

    Sorry didn't know I couldn't post email, just...

    Sorry didn't know I couldn't post email, just look at my profile
  32. Replies
    5
    Views
    689

    You can hit me up anytime. Shoot me an e-mail at...

    You can hit me up anytime. Shoot me an e-mail at and I will give you some contact info. Just so you know, I have been in the field since 2008, went to arkansas tech university for a degree in...
  33. Replies
    15
    Views
    3,039

    With a box temp of 60 and suction pressure at 42...

    With a box temp of 60 and suction pressure at 42 (about 48 degrees) I would say you might need to close off the expansion valve a little to get your temp down in the evap. I usually shoot for about a...
  34. Replies
    5
    Views
    1,227

    http://www.taylor-company.com/service/resources/op...

    http://www.taylor-company.com/service/resources/op_man/0345_346_349_355op0.pdf
  35. Thread: R 409A Freezer

    by Flip14
    Replies
    4
    Views
    796

    What do you mean when you say the switch has 120v...

    What do you mean when you say the switch has 120v to it? Does it show 120v when you check across the switch? And is the switch your talking about a high limit that just turns off the heater or is...
  36. Replies
    15
    Views
    3,039

    I would not be concerned with the head pressure....

    I would not be concerned with the head pressure. Even though your head pressure gets that high your expsansion valve should keep the pressure down in your evap. Condensing temps on units I work on...
  37. I agree with 2sac, you probably do need to clean...

    I agree with 2sac, you probably do need to clean the coil. Your head pressure is WAY too high. With the info you gave it could be a restriction and the unit could be overcharged trying to compensate...
Results 1 to 37 of 38
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event