Search:

Type: Posts; User: icemeister

Page 1 of 20 1 2 3 4

Search: Search took 0.09 seconds.

  1. Replies
    28
    Views
    979

    An excellent example of how it's done by the...

    An excellent example of how it's done by the book.

    For those who need one, here's the book: https://icemeister.net/backroom/wp-content/uploads/2017/08/Armaflex-Application_Manual-2017.pdf
  2. Replies
    3
    Views
    139

    .

    .
  3. Replies
    3
    Views
    139

    Here's the Kason catalog (See p.B101 for their...

    Here's the Kason catalog (See p.B101 for their high flow heated vent with sizing chart):

    http://www.kasonind.com/files/pdf/KasonWalkInCatalogWeb.pdf

    809422
  4. I'm glad you got a quick reply from the building...

    I'm glad you got a quick reply from the building department. I suggest you relay the "pipes in a sleeve" requirement to the contractors to verify if the existing is or is not properly sleeved. I'm...
  5. Do a search for another source for "HVAC coil...

    Do a search for another source for "HVAC coil selection software". There are dozens of US companies offering them for free, but they all require authorization of some sort to allow you to either...
  6. Since you are primarily concerned about the new...

    Since you are primarily concerned about the new system passing inspection due to the buried refrigerant piping, call your building department and get an inspector to look at the existing installation...
  7. Replies
    4
    Views
    448

    The problem when uploading pics from phones is...

    The problem when uploading pics from phones is the phone image files contain a code indicating the orientation. The vBulletin software used by HVAC-Talk doesn't recognize this code so for lack of any...
  8. Replies
    7
    Views
    266

    What is the name of the manufacturer and the case...

    What is the name of the manufacturer and the case model?

    If it's a Hill-Phoenix case, here's a video about flow setting a glycol case:



    https://www.youtube.com/watch?v=hpjk21X5E3Q
  9. When I was trained 50 years ago I was instructed...

    When I was trained 50 years ago I was instructed to blow off the refrigerant to the atmosphere, but times and standards change.

    25 years ago we were told more than 5% residual mineral oil was...
  10. Replies
    17
    Views
    710

    I always question what tech support says. ;) ...

    I always question what tech support says. ;)

    From where I sit, the A cartridge in the current BQ valve should be more than adequate. Before changing to a B cartridge however, be sure to try...
  11. The Paragon 877 gang timers are quite reliable in...

    The Paragon 877 gang timers are quite reliable in my experience. Precision timers on the other hand were rather a PITA.

    For an electronic type defrost timer you might try this one: ...
  12. For a 8' x 16' x 8' 0 Deg F freezer I calculated...

    For a 8' x 16' x 8' 0 Deg F freezer I calculated the load would be around 11,500 Btuh.

    The MOH015X6 has a capacity of 5280 Btuh at -10 Deg SST with R404A and 90 Deg F ambient.

    You're way...
  13. The only time I had an internal restriction in a...

    The only time I had an internal restriction in a condenser was on a 5-ton A/C condensing unit which just had a compressor replaced due to bad valves. I determined it was in the condenser after...
  14. Yes, I knew Doug well. We never got to work...

    Yes, I knew Doug well. We never got to work together much but he helped me out on several problem jobs. I believe he was a pretty much a protégé of Ed Cook when it came to such systems.
  15. For reason given by PHM, R404A simply isn't a...

    For reason given by PHM, R404A simply isn't a practical refrigerant for -60°C. It would be fine for the high stage as R404A works well for medium and high temperature applications.

    You should...
  16. Replies
    10
    Views
    376

    It means the liquid is subcooled.

    It means the liquid is subcooled.
  17. Replies
    12
    Views
    459

    I've never in my life seen that formula before. ...

    I've never in my life seen that formula before. If it weren't for Google, I wouldn't have a clue WTF it's about. ;)
  18. Replies
    12
    Views
    459

    Many years ago a wise professor drilled into us...

    Many years ago a wise professor drilled into us how important is is to keep track of your units as they are like a road map within the equation.

    What you show here is a simplified calculation...
  19. Replies
    3
    Views
    203

    For a 100 ft building, use the same psi/ft figure...

    For a 100 ft building, use the same psi/ft figure to calculate what the pressure drop would be for a 100 ft rise, then go to your PT chart to determine how much additional subcooling you would need...
  20. Replies
    3
    Views
    203

    If you look up the density of the refrigerant...

    If you look up the density of the refrigerant (lb/cu ft) and divide by 144 sq in / sq ft you will get the pressure drop per foot of height of liquid. Using your PT chart, find the pressure difference...
  21. I believe you want to do it at the end of the...

    I believe you want to do it at the end of the freeze when the suction begins to pull down again, but checking SH during the pulldown may display some useful trends like is the total SH at the...
  22. As mentioned earlier by pecmsg, Copeland requires...

    As mentioned earlier by pecmsg, Copeland requires a minimum 20°F superheat at the compressor. If this is not attainable with 4-5°F SH at the evaporator, then you can add a suction/liquid heat...
  23. I agree with Knave. You need to check the...

    I agree with Knave. You need to check the superheat for each TXV and set it for 4-5 Deg F. You definitely have at least one flooder. And eutectic systems are known for floodback issues if their...
  24. Replies
    8
    Views
    579

    I bought mine at a garden center in Florida at...

    I bought mine at a garden center in Florida at the recommendation of the owner who said the Goodyear hose is the only hoses he uses...and he used a lot of them. ;)
  25. Replies
    8
    Views
    579

    The best hose I have ever had is a Goodyear 5/8"...

    The best hose I have ever had is a Goodyear 5/8" black rubber hose that I bought 25 years ago. It was used on the job for nearly 20 years and has been hanging in the strongest sun on the planet for...
  26. Replies
    16
    Views
    1,054

    Before doing a R134A change you need to verify...

    Before doing a R134A change you need to verify that the existing FFAP unit would in fact have the capacity. Then do a load calc on the walk-in. get the walk-in evaporator model number and then get...
  27. Replies
    16
    Views
    1,054

    The hot gas bypass with desuperheating TXV would...

    The hot gas bypass with desuperheating TXV would be a very solid solution and would eliminate the need for an EPR (or multiple EPRs). A couple of years back I believe UmmScott had such a system and...
  28. Replies
    16
    Views
    1,054

    To run three independent loads with a single...

    To run three independent loads with a single compressor is always difficult to control but I see an additional issue here in what appears to me to be a vastly oversized condensing unit.

    If you...
  29. Replies
    39
    Views
    1,859

    In my experience, nearly every unit I found with...

    In my experience, nearly every unit I found with a plugged cap tube still had an operational compressor. What I learned after a while is the compressor bearing materials would typically experienced...
  30. Replies
    39
    Views
    1,859

    Let's just say, from about 1995 to 2013 when I...

    Let's just say, from about 1995 to 2013 when I retired, the vast majority of systems I found to have restricted capillary tubes were fairly new and factory sealed. Of the systems that had access...
  31. Replies
    39
    Views
    1,859

    The overheating is caused by the clogged...

    The overheating is caused by the clogged condenser. This heat plus moisture in the system creates an organic acid which attacks things like the compressor bearings and forms an organic salt which...
  32. Replies
    5
    Views
    320

    You're not trying to study to know all the...

    You're not trying to study to know all the answers, just to be familiar with the material enough to understand what it's all about, but you should know most of that already. In your preparation...
  33. Replies
    39
    Views
    1,859

    I hope you local power supply is 220V 50 Hz as...

    I hope you local power supply is 220V 50 Hz as that's what that compressor is designed for. ;)
  34. Replies
    5
    Views
    320

    First you need to get all of the required books...

    First you need to get all of the required books for the licence you are shooting for. Then I suggest either signing up for exam classes or order a home study package with practice exams for both the...
  35. Replies
    7
    Views
    497

    What is the model number of the expansion valve? ...

    What is the model number of the expansion valve? If it's a Sporlan, does it end in ZP? That would indicate it's a MOP type powerhead which for R404A limits the refrigerant flow so the suction...
  36. Replies
    12
    Views
    575

    How To Add or Edit An Avatar You first need to...

    How To Add or Edit An Avatar

    You first need to adjust the size of your avatar so it will fit in the space allotted on this site. The maximum size of your Avatar is 150 x 150 pixels or 39.1 KB...
  37. Replies
    11
    Views
    549

    The older style Bally evaporators were...

    The older style Bally evaporators were essentially medium profile. Their current BF-200 is a five-fan low profile but the old ones were a two-fan style with a fan diameter of about 16" or so.

    The...
  38. Thread: C-053

    by icemeister
    Replies
    9
    Views
    1,201

    When you say not reaching setpoint, do you mean...

    When you say not reaching setpoint, do you mean the box temperature or the rack suction? With high humidity and infiltration issues in the store along with one dead pump you're fighting a high low...
  39. Thread: C-053

    by icemeister
    Replies
    9
    Views
    1,201

    The subcooler should take care of any lack of...

    The subcooler should take care of any lack of subcooling due to pressure drop. So is there the issue with this box which caused you to look at the filter drier size or is that it?
  40. Thread: C-053

    by icemeister
    Replies
    9
    Views
    1,201

    The C303 recommendation is for system protection...

    The C303 recommendation is for system protection and water removal. The drier's actual flow capacity is a different matter. The same connection size would have very similar flow capacity.

    The...
  41. Replies
    60
    Views
    1,704

    That's how I have handled it for years. The...

    That's how I have handled it for years. The "new" mold is not the same as what makes the cheese and should be cut off.

    It reminds me of the story my mother told of my great grandfather, a crusty...
  42. Replies
    18
    Views
    799

    I've had a Whirlpool Duet frontloader for 15...

    I've had a Whirlpool Duet frontloader for 15 years and it's never missed a beat. It cut drying time in half and is so much gentler on the clothes they last a lot longer.

    The matching dryer's...
  43. Thread: C-053

    by icemeister
    Replies
    9
    Views
    1,201

    It would be helpful to know some details about...

    It would be helpful to know some details about the system like the refrigerant, evaporator and compressor models.

    I suspect either the line sizing is undersized or the TXV may be oversized. For...
  44. Replies
    10
    Views
    571

    Do you mean this diagram? I think that must be...

    Do you mean this diagram? I think that must be the receiver, although it's not labeled as such.


    https://static.wixstatic.com/media/6f869d_154b6f76de2b46bc92cf8758191d3c46~mv2.gif
  45. Replies
    10
    Views
    571

    Yes, the Flash Gas Condenser (FGC) contains a PCM...

    Yes, the Flash Gas Condenser (FGC) contains a PCM or "phase change material". This is what we commonly call a "eutectic solution" which has a relatively low freezing point. similar to what you would...
  46. Replies
    14
    Views
    646

    When I was with a Connecticut market chain, in...

    When I was with a Connecticut market chain, in 1986 we did a major remodel/expansion at the Nantucket store with new racks which included 20 tons of store A/C on the MT (R12) rack.
  47. Replies
    14
    Views
    646

    Such ideas of building a super-efficient...

    Such ideas of building a super-efficient refrigerator and freezer are intriguing until one considers how very efficient and reliable quality home appliances are today. It would be very difficult to...
  48. Replies
    4
    Views
    446

    http://www.colmaccoil.com/media/107898/subcooler-a...

    http://www.colmaccoil.com/media/107898/subcooler-assembly-engineering-bulletin-eng00020119-rev-a.pdf
  49. Me :putergreet: For the first 40 years of...

    Me :putergreet:


    For the first 40 years of my existence I lived in New England where 70-72°F was comfortable. Since living in the warmer climates of Florida and Ecuador my comfort zone is more...
  50. I think if you were to reverse-engineer the...

    I think if you were to reverse-engineer the condensate drain size table you would find it's based on the quantity of condensate produced at AHRI/ASHRAE standard entering air conditions of 80 Deg F db...
Results 1 to 50 of 1000
Page 1 of 20 1 2 3 4