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Type: Posts; User: josan6

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  1. Replies
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    Bet he learned how to "STOP,LOOK,AND USE HIS...

    Bet he learned how to "STOP,LOOK,AND USE HIS METER".
    ---------------------------------------------------------
    That's true, I read it before in books, but now with that experience I'm taking more...
  2. Replies
    18
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    2,606

    Compressor blew up

    I got a service call yesterday, a four Kysor Warren Delli cases were warm. First thing after arrive was checked a 4HP condensing unit, found off, no power in disconnect. Checked breaker panel,...
  3. Replies
    16
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    7,331

    I use a Fluke K thermocouple wrapped around pipe...

    I use a Fluke K thermocouple wrapped around pipe and connected to a Supco DAVM+ for checking temperature, I'm not sure if there is an accuracy problem with it. Someone has used the Fluke infrared...
  4. Replies
    16
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    7,331

    Thanks all, Sorry but I forget say kind of freon...

    Thanks all,
    Sorry but I forget say kind of freon inner, of course is R-22. I checked room temp with my thermometer. Room is loaded with geeks of beer. Evaporator was iced six months ago, I installed...
  5. Replies
    16
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    7,331

    Walk in cooler superheat

    I'm working in a walk in cooler, 4 tons Copeland compressor and russell evaporator. Room temp is fine, 35 F or little less; Suction pressure 30 psig, high side 200 psig; full sight glass; checked...
  6. Replies
    10
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    1,020

    I'm trying to organize my records from service...

    I'm trying to organize my records from service call have attended, all that information (compressor model, pressures, problems, etc.) is in notebooks (paper not computer). Somebody know kind of...
  7. Thread: Walk-in freezer

    by josan6
    Replies
    12
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    1,415

    Clogged drain line, very common, check drain line...

    Clogged drain line, very common, check drain line insulation and heater tape, and off course, melt all ice and put some pressure (Nitrogen o CO2) inside the drain line for cleaning.
  8. Replies
    3
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    831

    Someone can say something about reasons why motor...

    Someone can say something about reasons why motor compressors become locked up?. Thanks in advance.
  9. Replies
    2
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    899

    I'm working in a typical open cooler (produce)...

    I'm working in a typical open cooler (produce) used in supermarkets, and wants to clean the "honeycomb" without remove it of its place. Anybody have an idea, or knows kind of chemical that works...
  10. Replies
    16
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    1,324

    The thing is that I have a supervisor or...

    The thing is that I have a supervisor or "technical manager", one of that guys who think knows everything in refrigeration business, and when I suggest him replace filter drier, he said is not...
  11. Replies
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    1,324

    I asked for comments about a specific situation,...

    I asked for comments about a specific situation, and nobody say anything about it. I understand that someones are scary to share what they think are job secrets, and are very fast to make judgements...
  12. Replies
    16
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    1,324

    I replaced an old evaporator coil in a walk-in...

    I replaced an old evaporator coil in a walk-in cooler. First I pumped down refrigerant, cut refrigerant lines, and removed old one. After install the new and welding lines, I need start again the...
  13. Replies
    3
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    836

    Small refrigerator, 1/3 HP compressor, R-134a,...

    Small refrigerator, 1/3 HP compressor, R-134a, accord with nameplate charged 8 oz. of refrigerant.
    Recently I replaced compressor and charged refrigerant, unit is drawing correct amperage, but low...
  14. Thread: Door gasket

    by josan6
    Replies
    5
    Views
    868

    I need to replace a damaged door gasket in a...

    I need to replace a damaged door gasket in a Manitowoc freezer (very common in restaurantes), model is deleted, but is one solid door, 115 volts. Somebody can give me some idea how to do it, is first...
  15. Replies
    3
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    802

    I would like to know opinions about how to test...

    I would like to know opinions about how to test valve plates in hermetic compressors.

    What I do, pumping down system and verify if pressure raise in suction line after compressor off.

    Thanks...
  16. Replies
    5
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    1,411

    Suppose a typical pump-down system (walk in...

    Suppose a typical pump-down system (walk in cooler), using r-22, thermostat setted at 35 F, low pressure control at 30 (co) and 60 (ci), and ambient temperature at condenser place is 80 F.

    Unit is...
  17. Replies
    10
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    3,009

    What is the correct way to charge a small...

    What is the correct way to charge a small commercial refrigerator, with cap tube instead of txv, no sight glass, no lpc?. I have started up units with sight glass and txv, but never this kind. Thanks...
  18. Replies
    8
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    1,079

    What I asked was opinions and advices, no...

    What I asked was opinions and advices, no personal critics, but yes, I'm beginner in the field and don't feel bad to say it.
  19. Replies
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    1,079

    I have to replace a solenoid valve in a walk-in...

    I have to replace a solenoid valve in a walk-in cooler with a 5 tons compressor. My boss says that I have to do a pump down to store refrigerant in the receiver, replace part, and re-start system...
  20. Replies
    10
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    1,604

    Is just the fitting, what I do is, first, a...

    Is just the fitting, what I do is, first, a pumpdown to store most refrigerant in receiver; and second, remove the fitting and quickly replace with the other one. After that, adjust the new setpoints...
  21. Thread: Changing TXV

    by josan6
    Replies
    6
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    856

    What can happen if somebody install a TXV,...

    What can happen if somebody install a TXV, indicated to use in a freezer, in a cooler?
  22. Replies
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    9,321

    I'm working in a Copeland compressor, model...

    I'm working in a Copeland compressor, model CF12K6E-TF5, and want to know how many horse power of capacity is, the name plate don't say anithing about it.

    Accord with Copeland handbook, compressor...
  23. Replies
    5
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    3,201

    That's correct, Nick, I worked in a pizza shop...

    That's correct, Nick, I worked in a pizza shop for a while and the temperature in the walk-in cooler was setted between 35 and 40 degrees. Just looks in the T-P chart to figure out LPC values.
  24. Thread: Kysor-Warren

    by josan6
    Replies
    12
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    975

    Don't worry about compressor, the unit has five...

    Don't worry about compressor, the unit has five evaporator fans, without one working is not a big problem, at least is what I hope.
  25. Thread: Kysor-Warren

    by josan6
    Replies
    12
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    975

    Hey, market-tech, maybe the .PDF file is bigger...

    Hey, market-tech, maybe the .PDF file is bigger than my free space in hotmail, can you send me that file to this e-mail adress: cezmat@igc.org?. Thanks a lot.
  26. Thread: Kysor-Warren

    by josan6
    Replies
    12
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    975

    You are correct, becouse the unit is running and...

    You are correct, becouse the unit is running and the store is open, I need to access the fan motor through the top, and is suppose posible.
  27. Thread: Kysor-Warren

    by josan6
    Replies
    12
    Views
    975

    I need specially diagrams, electrical and...

    I need specially diagrams, electrical and mechanical. I need to change an evaporator fan motor without remove products over, and is first time that I work with this kind of unit.

    If you have...
  28. Thread: Kysor-Warren

    by josan6
    Replies
    12
    Views
    975

    Anybody know this equipement: C1W ISLAND CHEESE,...

    Anybody know this equipement: C1W ISLAND CHEESE, Kysor-Warren manufacturer?

    I need manuals but can't find in internet.

    Thanks.
  29. Replies
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    828

    The walk-in cooler is a new installation (around...

    The walk-in cooler is a new installation (around 3 months running). I checked for restrictions and nothing found. Is obvious that the system is controlled by the LPC instead of the thermostat. I...
  30. Replies
    7
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    828

    I went to a store in a town almost 2 hrs driving...

    I went to a store in a town almost 2 hrs driving from here just to do maintenance in a walk-in cooler, with a 4 HP Copeland compressor, 3 phase motor and R-22.

    When I arrived, the inside box was...
  31. Replies
    8
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    7,194

    Trying to brazing a steel to copper connection,...

    Trying to brazing a steel to copper connection, do I have to use a kind of flux or is correct do it as a copper to copper?. I use oxi-acetylene torch, and use silfox solder.

    Thanks for comments.
  32. Replies
    10
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    1,575

    I said "discharge service valve", and I wanted ...

    I said "discharge service valve", and I wanted to say the service valve located after receiver. I'm not an expert, just a beginner who want to learn. Some guys write like experts, but I think a...
  33. Replies
    10
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    1,575

    This is what I understand for "make a pumpdown"...

    This is what I understand for "make a pumpdown" in a refrigeration system: Close discharge service valve all the way in, continue running the compressor until suction pressure is 10 psi, stop the...
  34. Thread: About RLA

    by josan6
    Replies
    9
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    1,352

    I need to know where find that information...

    I need to know where find that information (current draw for specific condensing pressures) for specific compressor, I have Copeland electrical handbook, and doesn't have. Abybody knows?. Thanks.
  35. Thread: About RLA

    by josan6
    Replies
    9
    Views
    1,352

    What mean RLA?...I know that literally mean Rated...

    What mean RLA?...I know that literally mean Rated Load Amperage, but my question is what really means. Example: a compressor nameplate say RLA=16, but an ammeter say amperage values are 8.3, 8.3,...
  36. Replies
    3
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    1,111

    Some days ago I had a problem trying to charge a...

    Some days ago I had a problem trying to charge a big refrigeration system with R-22, charging process was very low.
    I asked to a friend about a "trick" to do this process faster, and he recommend me...
  37. Replies
    9
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    2,395

    I'm checking a 3 phase compressor motor, current...

    I'm checking a 3 phase compressor motor, current values are: 13, 10.8 and 9.2 amps. How can I Know if there is an unbalance current or if that current variations are normal?.

    Thanks for comments.
  38. Replies
    2
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    912

    Is correct to charge refrigerant as liquid when...

    Is correct to charge refrigerant as liquid when the unit is running?....A co-worker says that can occur an accident when the refrigerant cilynder is to low becouse pressure difference, Is that...
  39. Replies
    2
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    764

    I'm working in a new walk-in cooler installation....

    I'm working in a new walk-in cooler installation. and have a doubt, Is correct install the sight glass inmediately next to receiver and before filter drier?, Why not?. What I learned in school is...
  40. Replies
    22
    Views
    2,943

    I'm working in a new wlk-in cooler, trying to...

    I'm working in a new wlk-in cooler, trying to charge refrigerant (R-22) first time. The condensing unit is Copeland, with a 3.5 HP compressor, one receiver and one accumulator in the suction line.
    ...
  41. Thread: Maintenance

    by josan6
    Replies
    2
    Views
    784

    What do you guys reccomend to do in a...

    What do you guys reccomend to do in a maintenance routine to a walk-in cooler working with a condensing unit using a three phase compressor motor (3 to 5 HP)?

    Thanks.
  42. Replies
    6
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    1,027

    I knew for experience that when valve is back...

    I knew for experience that when valve is back seated, one port is closed and the other is open, and I guess that in front seated position is viceverse, one open and the other is closed.

    What is...
  43. Replies
    6
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    1,027

    In some walk-in coolers I've seen a kind of...

    In some walk-in coolers I've seen a kind of service valve (in the discharge line) with two service port. Somebody can tell me for what two instead of one, any difference?. Thanks.
  44. Replies
    5
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    1,059

    Do you think is correct isolating the system...

    Do you think is correct isolating the system between compressor and receiver by setting both service valves in front position?, and after, inject nitrogen on the service port in the discharge valve?....
  45. Replies
    5
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    1,059

    How many pounds of pressure of nitrogen is...

    How many pounds of pressure of nitrogen is correct to put inside a system when trying to find a leak?, I mean is there a limit?, is there some relationship between amount of nitrogen an the size of...
  46. Replies
    2
    Views
    577

    Is correct try to find a restriction or a leak in...

    Is correct try to find a restriction or a leak in a system isolating the part between suction line service valve and discharge line service valve, storing the refrigerant in the receiver?.The system...
  47. Replies
    5
    Views
    707

    Is correct try to find a restriction or a leak in...

    Is correct try to find a restriction or a leak in a system isolating the part between suction line service valve and discharge line service valve, storing the refrigerant in the receiver?.The system...
  48. Replies
    6
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    4,938

    Yes, is an answer but is not complete, I can...

    Yes, is an answer but is not complete, I can figure out that technicians don't work for long time in Sears, but what I would like to hear is what are the most common reasons for that. I have not too...
  49. Replies
    6
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    4,938

    Some of you, guys, have had some experiences...

    Some of you, guys, have had some experiences working with Sears as a service technician?, is a good work environment?...I have heard two guys whom say that is too much pressure.

    Any opinion is...
  50. Replies
    2
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    5,702

    Who can tell me, based in experiences on the...

    Who can tell me, based in experiences on the field, the most common causes of compressors burn out?

    Thanks
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