Search:

Type: Posts; User: MicahWes

Page 1 of 17 1 2 3 4

Search: Search took 0.02 seconds.

  1. Replies
    36
    Views
    1,122

    My point is, the majority of heat transfer is the...

    My point is, the majority of heat transfer is the result of phase change (condensation in this instance), not from the small gains from compressor motor heat or heat of compression. Desuperheating,...
  2. Replies
    36
    Views
    1,122

    That doesn't sound quite right to me!

    That doesn't sound quite right to me!
  3. Replies
    36
    Views
    1,122

    Why is lower discharge temperature...

    Why is lower discharge temperature counter-productive for heat pumps?
  4. Thread: display HELP!

    by MicahWes
    Replies
    23
    Views
    624

    You can't really do that with a pumpdown system....

    You can't really do that with a pumpdown system. You need more frequent defrosts, at the least. Also, if the room temp is much over 80F, you will never be able to keep that case at temp.
  5. Thread: display HELP!

    by MicahWes
    Replies
    23
    Views
    624

    4 times a day for 20 minutes is very likely not...

    4 times a day for 20 minutes is very likely not nearly enough for an open case that is not controlled by a pressure switch. I would have 10-15 minutes of defrost per HOUR if the relative humidity of...
  6. Thread: display HELP!

    by MicahWes
    Replies
    23
    Views
    624

    Is the A19 control the original control? We don't...

    Is the A19 control the original control? We don't have a lot of Marc stuff around here, but the few I service are controlled by a low pressure switch alone. They are very reliable for open cases. I...
  7. Remember that driers are full of dessicant....

    Remember that driers are full of dessicant. Doubling the size of a drier will (usually) double the size of the dessicant mass inside. Due to the fact that most of the internal volume is taken up by...
  8. Replies
    14
    Views
    762

    Pressure will be the SAME inside the box during...

    Pressure will be the SAME inside the box during the night. Well, always, except when the door was just opened.

    There is another problem somewhere, and it has nothing to do with relief ports.
  9. Replies
    20
    Views
    831

    Closers are designed to be mounted on the center...

    Closers are designed to be mounted on the center of the door so that the door will more certainly be in range of the closer engaging when the gravity (maybe with spring assist) hinges are closing the...
  10. Replies
    10
    Views
    382

    http://www.sdcsecurity.com/pth-Electric-Power-Tran...

    http://www.sdcsecurity.com/pth-Electric-Power-Transfer-Hinge.htm
  11. Replies
    10
    Views
    382

    There is very likely some kind of electrical...

    There is very likely some kind of electrical mechanism in the door that is causing the heat. You might not see any wires either, since they probably used electrified hinges.
  12. Replies
    22
    Views
    1,408

    Just for everyone's curiosity, the hot gas...

    Just for everyone's curiosity, the hot gas harvest cycle on a Hoshizaki KM machine is assisted by the inlet water, not the other way around. It is just semantics, but I think it is interesting to...
  13. Replies
    2
    Views
    863

    They are still widely used. Manitowoc curtain...

    They are still widely used. Manitowoc curtain switches come to mind.
  14. Replies
    2
    Views
    708

    On the original board, there should be a force...

    On the original board, there should be a force defrost/normal jumper that you move.
  15. Replies
    12
    Views
    1,214

    Restriction=no work be being done= low head.

    Restriction=no work be being done= low head.
  16. Thread: R-22 retrofit

    by MicahWes
    Replies
    31
    Views
    2,183

    Keep it R 22. There is absolutely no reason to...

    Keep it R 22. There is absolutely no reason to retrofit in this application.
  17. Replies
    12
    Views
    1,214

    I'm surprised with two pounds of refrigerant in...

    I'm surprised with two pounds of refrigerant in that small system the compressor would even run. Anyway, the answer is pretty easy if you just think about it for a moment... You know the charge is...
  18. Replies
    19
    Views
    1,554

    True used to recommend running replacement cap...

    True used to recommend running replacement cap tubes up through the suction lines. I have done it several times. A handful of times I had to give up due to not being able to get the tube through a...
  19. Probably. This stumps folks a lot. The hissing...

    Probably. This stumps folks a lot. The hissing TXV was a dead giveaway.
  20. Replies
    43
    Views
    2,650

    We have several Kold-Drafts running in my city...

    We have several Kold-Drafts running in my city now. One with the optional crusher. They do OK. They have needed some random things (a few pumps, most notably), but have generally been OK. The have a...
  21. Replies
    15
    Views
    2,672

    It should be noted that there is no Follett LC12....

    It should be noted that there is no Follett LC12. The icemaking equipment is most likely a 12CI400A, or similar. I work on hundreds of Follett countertops, remote Maestro's and Horizon's, and the new...
  22. Replies
    41
    Views
    3,135

    While sometimes these similar tools (and other...

    While sometimes these similar tools (and other items) ARE indeed the exact same thing, there are a large amount of tools that are made to different specifications for different customers (retail...
  23. Replies
    12
    Views
    577

    Make sure the machine is producing the proper ice...

    Make sure the machine is producing the proper ice quality. It should be nugget ice. The pieces should be very distinct and hard. You probably have a refrigeration problem that is causing the machine...
  24. Replies
    39
    Views
    2,177

    I went this afternoon. The equipment is a 1985...

    I went this afternoon. The equipment is a 1985 Norlake drop-in unit on top of the box. It started with R12, then was changed to R401(MP39). That apparently remained in service until sometime in the...
  25. Replies
    39
    Views
    2,177

    Illegal?

    Illegal?
  26. Replies
    39
    Views
    2,177

    The P/T charts for the two refrigerants are very...

    The P/T charts for the two refrigerants are very similar.
  27. Replies
    39
    Views
    2,177

    That is probably what I will end up doing. I want...

    That is probably what I will end up doing. I want to go there and see the condition of the equipment first. This customer is cheap. I get the feeling he just wants a gas and go. He isn't very...
  28. Replies
    39
    Views
    2,177

    Mix 414b and 409a?

    I have an occasional and somewhat annoying ice machine customer that has now called me about his 20+ year old walk-in cooler. I didn't make it there Thursday, but I am going in the morning. I have...
  29. Slugging and floodback are two different things.

    Slugging and floodback are two different things.
  30. Replies
    11
    Views
    1,551

    Whatever you do, do NOT sand the evap walls too...

    Whatever you do, do NOT sand the evap walls too smooth. If you do, the ice will sometimes rotate with the auger instead of being forced upward. It will freeze up and torque out in 20 seconds under...
  31. Oh, and yes. You can remove the bearings without...

    Oh, and yes. You can remove the bearings without replacing any seals. The top bearing housing has no seal. Just remove band and twist out top bearing housing. The bottom bearing housing just has an...
  32. Check all the obvious things: Is it clean? This...

    Check all the obvious things: Is it clean? This includes the ice compression nozzle. If you have more than one random torqueout, just remove the bearings and check them. It is so easy on Folletts.
    ...
  33. Replies
    26
    Views
    1,826

    It has nothing to do with saving a negligible...

    It has nothing to do with saving a negligible amount of profit per unit. It has to do with service life reliability. Over the service life of your average, well-maintained reach-in, there is no need...
  34. Replies
    9
    Views
    846

    If you put a non-oem (not a constant cut-in)...

    If you put a non-oem (not a constant cut-in) control on a True reach in, are you sensing air temp or coil temp? I wouldn't put an air temp control on one of those boxes. You will have freeze up...
  35. Replies
    15
    Views
    1,288

    Remember, a solid-core drier that is a size or...

    Remember, a solid-core drier that is a size or two larger does not hold very much extra refrigerant. A larger drier has a larger dessicant/filtration core and won't hold much more liquid.
  36. Replies
    13
    Views
    1,407

    I think those covers are there more to contain...

    I think those covers are there more to contain shrapnel from a terminal blowout than they are to protect anyone from the live electrics.
  37. Replies
    32
    Views
    2,127

    They don't need heaters. They need more defrosts....

    They don't need heaters. They need more defrosts. Some of my problem open cases run at least a 20 minute defrost every two hours to keep coils clear. You also need to make sure the coil superheats...
  38. I am not familiar with the model you listed, but...

    I am not familiar with the model you listed, but I think you might be misunderstanding the refrigeration circuits. Most Victory cold-wall prep tables have two circuits; One for the evaporator below,...
  39. Replies
    12
    Views
    831

    Different refrigerants are different densities,...

    Different refrigerants are different densities, so a hose full of liquid of one kind of refrigerant will be a different weight than a hose full of a different refrigerant. It isn't a huge deal when...
  40. Replies
    19
    Views
    1,533

    The left hand condenser fan blade is on the wrong...

    The left hand condenser fan blade is on the wrong way around, and the blades don't even match.

    The condenser is probably dirty. They always are.
  41. Thread: pump down

    by MicahWes
    Replies
    20
    Views
    1,692

    I have heard many times that the main purpose of...

    I have heard many times that the main purpose of a fan delay is to lower load on compressors. I don't really agree.

    During hot pull down, the fans stay off until coil is below freezing, then they...
  42. Replies
    19
    Views
    1,700

    I have hundreds of mechanical, remote bulb...

    I have hundreds of mechanical, remote bulb controls mounted inside cold rooms. They work just fine that way. Also, loosing head pressure during low ambients will usually cause the suction line temp...
  43. Wow, Mr. Guy! That would cut my business in half!...

    Wow, Mr. Guy! That would cut my business in half!

    I used to roll my eyes when I encountered a reach in with no ports, but I understand why they do this. It really is best for small systems with...
  44. I can only think of one grill cooler (of maybe...

    I can only think of one grill cooler (of maybe 100 that are in my service locations) that could be remoted. They have to be able to be moved out from under the hood.
  45. The purpose of the fan delay is to allow the...

    The purpose of the fan delay is to allow the defrost heat added by the heaters to be removed instead of blown into the room, and to allow residual moisture to re-freeze on the coil so it isn't blown...
  46. Replies
    21
    Views
    1,503

    Well, it sounds like the overload is sensing an...

    Well, it sounds like the overload is sensing an overload!
  47. Most beers would probably be fine (not frozen)...

    Most beers would probably be fine (not frozen) around 28F, but if a standard keg pressure is maintained over the beer (10-14psig) at those temps the beer will overcarbonate quite a bit and be very...
  48. They can have all the opinions they want, what I...

    They can have all the opinions they want, what I stated is matter of physics.
  49. 33-34 is too cold for storage of keg beer. If not...

    33-34 is too cold for storage of keg beer. If not allowed to warm up a little before tapping, it will over carbonate.
  50. Replies
    21
    Views
    5,156

    What is wrong with this piping? I don't see...

    What is wrong with this piping? I don't see anything that would cause any oil return issues with that tiny little system.
Results 1 to 50 of 836
Page 1 of 17 1 2 3 4

Related Forums

Plumbing Talks | Contractor MagazineThe place where Electrical professionals meet.
Comfortech365 Virtual Event