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Type: Posts; User: Restaurant mech

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  1. Replies
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    An erv will pretty much always be better in most...

    An erv will pretty much always be better in most situations.
    The thing to remember with them is that they aren't perfect at maintaining humidity.
    If it was my house I'd be going with the erv.
  2. Improperly done flares can corrode and loosen...

    Improperly done flares can corrode and loosen off.
    They can also just loosen up if water gets in the threads and freezes. ( that's why some refrigeration flares have holes at the base of the...
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    Longer run times ensure better comfort. Is...

    Longer run times ensure better comfort.
    Is this a multi stage unit?
    Do you have a modern learning thermostat?
    It's probably working as designed
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    I'd look at more attic insulation especially on...

    I'd look at more attic insulation especially on the ductwork
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    I refer to them as drywall angers. Simply...

    I refer to them as drywall angers.
    Simply because I get angry when people use them for something other than the intended purpose.
  6. I'd suggest just buying a complete package,...

    I'd suggest just buying a complete package, condenser, coil and line set.
    You may be able to find a dry charged r22 or 407 condenser, but you won't be saving much vs just going new, matched, and...
  7. I'm impressed they even used a micron guage. It...

    I'm impressed they even used a micron guage. It wasn't proper but at least they had one lol
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    I prefer to sick with separate caps. Less heat...

    I prefer to sick with separate caps. Less heat buildup and longer life IMO.
  9. Replies
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    From what I can see, that tecumseh would likely...

    From what I can see, that tecumseh would likely work.
    Only problem is finding a tech that's not afraid to modify a unit.
  10. Replies
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    Then call a refrigeration company. Geothermal...

    Then call a refrigeration company.
    Geothermal is much closer to commercial refrigeration than it is to hvac.
    Although as a refrigeration guy I find both Geothermal and regular hvac pretty easy...
  11. Then I'd go up 1/2 ton from what you currently...

    Then I'd go up 1/2 ton from what you currently have and NO MORE.
  12. Jeez I would have just recovered the charge, got...

    Jeez I would have just recovered the charge, got rid of the core max, brazed it up and recharged.
    It's not rocket science
  13. For moni splits I think all major manufacturers...

    For moni splits I think all major manufacturers are pretty good.
    Mitsubishi, Fujitsu, lg and then the rebranded midea stuff.
    Lately been installing lots of carrier ( midea) and they work...
  14. 150k is going to be WaAAaY too big. If your...

    150k is going to be WaAAaY too big.
    If your current setup heats fine (which I'm sure it does ) then Don't go bigger.
    As far as cooling goes, how close does the house come to maintaining...
  15. Could be an ISO or bubble flare. Automotive...

    Could be an ISO or bubble flare.
    Automotive switched to those years ago.
  16. Frankly I'd just buy a pool heat pump and mount...

    Frankly I'd just buy a pool heat pump and mount the condenser inside the house and run pool plumbing to the condenser in the house.
    But I do tend to be a little crazy.
    Now having said that ,...
  17. Thread: MO99

    by Restaurant mech
    Replies
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    667

    I been using m099 for years. It's practically the...

    I been using m099 for years. It's practically the same as 407c but has hydrocarbons in it for oil return. And therefore a little loss in capacity.
    Personally for me It's a wash. I use 407c as...
  18. Especially on something old I'd try and keep...

    Especially on something old I'd try and keep discharge under 180.
    Cleaning the condenser may be all you need to do to achieve this.
    The other thing is it may be a little low on charge. I'd be...
  19. I don't have any suggestions, but I've been...

    I don't have any suggestions, but I've been having lots of major problems with lg units lately.
    I never installed any of them so I don't really know if it's installation problems or not with...
  20. So you were happy with the old system sizing and...

    So you were happy with the old system sizing and went bigger?
    That's a problem.
    Luckily you purchased 2 stage equipment. With a quality thermostat and proper wiring you should be able to...
  21. A slow rise like that usually indicates either...

    A slow rise like that usually indicates either system pressure equalizing, or moisture in the system.
    Often times I'll vacuum on the suction side of a new system and install my micron guage on...
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    Yeah the copper ring is the flare gasket

    Yeah the copper ring is the flare gasket
  23. Replies
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    The tech likely said 30 as a minimum. Now if...

    The tech likely said 30 as a minimum.
    Now if it's fused you can still run a 60 Amp disconnect and install 30 Amp fuses.
    For me, if the breaker in the panel is appropriate then I usually don't...
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    Never used flare gaskets between 2 forged flare...

    Never used flare gaskets between 2 forged flare fitting adaptors?
  25. As pecmsg said. Worry most about superheat at the...

    As pecmsg said. Worry most about superheat at the pump.
    In an ideal world I set freezer superheat to 6-10 degrees f towards the end of the cycle.
    For MOST coolers I'll generally run 9-16 f at...
  26. Replies
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    I was handed a project last year. Home built...

    I was handed a project last year. Home built box, we did the refrigeration install through a 3rd party.
    Of course the vapor barrier is on the inside of the box. And now I own this nightmare job...
  27. I use both big blue and the low temp cal blue. ...

    I use both big blue and the low temp cal blue.
    They both work really well from a sprayer.
    The low temp is good in the winter....
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    For the flare reducers I just pick them up at the...

    For the flare reducers I just pick them up at the supply house.
    Don't forget flare gaskets as you NEED them with flare adaptors
  29. I have a speed clean. It uses basically an alarm...

    I have a speed clean. It uses basically an alarm battery ( sealed agm style) so I'm not worried about the price of a new battery.
    I can do around 5 fills on the unit between charges.
    I like...
  30. I always try to make my installs absolutely...

    I always try to make my installs absolutely level.
    But at the same time I've also always wanted to mount a unit sideways just to see what happens.
    If it's an older unit, and out by 1/4 inch I...
  31. It's looking to me like the coil was washed from...

    It's looking to me like the coil was washed from the outside in.....
    Therfore It's environmental crap all over the compressor.
    First question is does the unit work?
    If it works at all...
  32. The piston definitely requires changing. It's...

    The piston definitely requires changing. It's obviously not reciprocating with the connecting rods anymore.
    You should have the crankshaft balanced while it's out too
  33. Replies
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    Seer is a bit of a misnomer. Yes generally a txv...

    Seer is a bit of a misnomer. Yes generally a txv can load and unload a system for better efficiency.
    However a piston running in ideal conditions with achieve the same results.
    The problem...
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    Could be time to wash the coil. At that load I'd...

    Could be time to wash the coil. At that load I'd be happier closer to ambient temperature
  35. Yup that's cork insulation. I used to work in...

    Yup that's cork insulation.
    I used to work in an old cold storage facility. It had 5 feet of cork around it.
    When it finally caught fire it took the fire department almost a week to...
  36. Replies
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    You are letting an internet handle get the best...

    You are letting an internet handle get the best of you. If I based my opinion of your work be based on the 420 aspect I'd assume you did no actual work.
    Don't make the mistake of assuming that...
  37. Replies
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    Txv and a solenoid.... hmm if I'm vacuuming a...

    Txv and a solenoid.... hmm if I'm vacuuming a system it's got a magnet on the solenoid.
    And I'm reading the opposite side.
    You are definitely free to service as you see fit. But when I'm...
  38. Replies
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    Yes I definitely understand what you're pulling a...

    Yes I definitely understand what you're pulling a vac on.
    I do it a couple times a month.....
    And to do it properly takes time.
    To do it with reading what the pump is doing doesn't.
    ...
  39. A trap should be able to be installed in the run...

    A trap should be able to be installed in the run that's shown
  40. Replies
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    I typically pull from suction and read discharge....

    I typically pull from suction and read discharge.
    That's really the only way to get ab accurate vacuum reading. And that's really why there is no quick way to pull a vacuum.
    If you're...
  41. Replies
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    You see I'll pull from one side or the other then...

    You see I'll pull from one side or the other then measure on the opposite side I pull.
    The way you're doing it, you aren't reading the true vacuum of the system.
    If you can actually pull to...
  42. Replies
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    So measuring from the same side as pulling? If...

    So measuring from the same side as pulling?
    If you're measuring from the opposite side you'll actually have a true micron reading. Then no need to wait for decay
  43. Replies
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    Where were you measuring the microns? If you're...

    Where were you measuring the microns? If you're measuring on the same side you're pulling then it's NOT 1500 microns
  44. Replies
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    It's good practice to check superheat at evap....

    It's good practice to check superheat at evap. But ALWAYS set superheat at compressor.
    And the reason for setting at compressor is due to variables in the lineset.
    If everything is piped...
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    Probably needs the low pressure switch adjusted...

    Probably needs the low pressure switch adjusted if it's a pump down system.
    Too many guys leave the differential too close on freezers
  46. Replies
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    I'll chime in a bit here. Holding below 500...

    I'll chime in a bit here. Holding below 500 means the system is absolutely dry.
    Getting to an ACTUAL 500 on a system that's been in service is very difficult.
    Refrigerant mixes with oil....
  47. I'm saying that I hear 60 hertz . Likely not the...

    I'm saying that I hear 60 hertz . Likely not the fusite itself at this point but it sounds like an intermittent connection.
    I'd be pulling the plug off the compressor and having a really good...
  48. Replies
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    Question one is what is actually wrong with the...

    Question one is what is actually wrong with the condensing unit?
    If it needs a compressor then it's not worth fixing. But most other things are cheap and easy.
    A matched system is always...
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    Personally without a load calculation I'd go 3.5...

    Personally without a load calculation I'd go 3.5
    Unless redoing all ductwork going bigger is a mistake as your current ductwork is likely marginal at best
  50. Replies
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    If your furnace cycles off at all on the coldest...

    If your furnace cycles off at all on the coldest days of the year then you can go smaller.
    And smaller is pretty much always better for comfort.
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