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Type: Posts; User: kerndt

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  1. Replies
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    828

    You guys must learn how to measure voltage (to...

    You guys must learn how to measure voltage (to any type of device). Always measure voltage with load connected.

    Measuring ac voltage to ground will always make you chase your tail.

    If you...
  2. Thread: Revco -80

    by kerndt
    Replies
    9
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    1,035

    Most definitely not removable. I can’t believe...

    Most definitely not removable. I can’t believe it’s leaking there!
  3. Thread: Defrost Control

    by kerndt
    Replies
    10
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    1,120

    I think your looking for a smart defrost...

    I think your looking for a smart defrost controller. The dixell temperature controller uses incoming air temperature and evaporator coil temperature to activate the defrost cycle, fully programable...
  4. Thread: superior drier

    by kerndt
    Replies
    5
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    1,035

    Superior has been bought out by I believe by Alco...

    Superior has been bought out by I believe by Alco or Emerson? I personally love the brass housing, it doesn't rust.
  5. Replies
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    1,539

    15 years ago I did this to my home a/c system. I...

    15 years ago I did this to my home a/c system. I installed a 2 ton water condenser first and then the air cooled condenser for maximum use of the water condenser. The water valve is set at 210 psig...
  6. Replies
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    2,016

    I mostly work on lab equipment, Revco, Sanyo,...

    I mostly work on lab equipment, Revco, Sanyo, Forma etc... These units operate at a continuous ultra low temperature, where oil return is a huge issue. We use Pentane now mostly in Sanyo products...
  7. Replies
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    2,016

    most of the thermotrons ive worked on dont use an...

    most of the thermotrons ive worked on dont use an additive. They are typically not used for continous ultra low temperatures and oil return has not been a problem. But if any unit calls for an...
  8. Replies
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    2,016

    Thermotron is very proprietary, if youíre not one...

    Thermotron is very proprietary, if youíre not one of their contractors, they may be tough to deal with. Sub cooling should be like every commercial system. Where did you get the valves and are they...
  9. Replies
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    2,016

    Curdogg, Curious what was the complaint before...

    Curdogg,
    Curious what was the complaint before you started working on this chamber, and what did you find on your initial inspection?

    Rusted TXV on these units is pretty common, but that in its...
  10. Thread: Lights

    by kerndt
    Replies
    7
    Views
    754

    I had one of those testers, and took it back. The...

    I had one of those testers, and took it back. The tester will light any flourescent blub that has not lost its gas, if the connectors or heaters at the end of blubs were bad the tester would still...
  11. Replies
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    1,240

    Is the drain tube heater power continously? Is...

    Is the drain tube heater power continously? Is the heater still good, recheck, with an ohm meter that can measure resistance at least too 10K ohm. I like to run the heaters inside the drain tube...
  12. check out this thread..........it answers your...

    check out this thread..........it answers your question

    http://www.hvac-talk.com/vbb/showthread.php?t=116028&highlight=kerndt+receiver
  13. Replies
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    1,584

    Check out the dixell controls, they have controls...

    Check out the dixell controls, they have controls with alarms for high and low temperature with a built in buzzer and external contacts, plus have remote displays options. I think the XR170 control...
  14. Replies
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    1,756

    We have serviced many types of saltwater...

    We have serviced many types of saltwater aquariums in the Evolution and Ecology Department at U.C. Davis. Most of these units have a titanium heat exchanger and some use plastic coated copper coils...
  15. Replies
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    1,494

    The difference between the 701 and the 1560, one...

    The difference between the 701 and the 1560, one cuts in at 41 degrees and the other 39 degrees, also their cut out side has a different range. True offers a relay kit to take the stress off these...
  16. Replies
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    3,038

    787 great post, i agree, if polycold is a mix for...

    787 great post, i agree, if polycold is a mix for an autocasde system then it wouldn't work. i can't believe how misleading people can be. have you ever used propylene?, it has a boiling point of -47...
  17. Replies
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    3,038

    Hey guys, I have looked at this thread over the...

    Hey guys, I have looked at this thread over the past weeks, and I am not familiar with the "Polycold" refrigerant. I realize that they are probably a manufacture, but have you used their refrigerant...
  18. Replies
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    1,648

    If the system is a critically charged system...

    If the system is a critically charged system i.e.: small cap tube system, then it should not have a receiver. The critical charge system requires the ability to add refrigerant to adjust superheat...
  19. Replies
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    829

    If themotron did not list pentane or propane on...

    If themotron did not list pentane or propane on the unit, than you probably donít need it. R23 is an HFC refrigerant and is miscible with POE oils, adding pentane or propane should not be necessary....
  20. Replies
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    918

    This could be a great challenge for you, and I...

    This could be a great challenge for you, and I like your attitude "its just refrigeration". I think that was similar to my attitude 24 years ago.

    There is factory training and certification...
  21. Replies
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    9,289

    This was an old thread... What is a PTC?...What...

    This was an old thread... What is a PTC?...What type of refrigeration experence have you had prior to teaching?
  22. Replies
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    2,588

    I purchase them as an OEM, in larger quantities....

    I purchase them as an OEM, in larger quantities. But Iím willing to hook you guys up if you can find a local distributor.

    Yes they seem too good to be true, but they are that good.

    These units...
  23. Replies
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    2,588

    Bago, a total solution would be a XR160C control...

    Bago, a total solution would be a XR160C control from Dixel. http://www.weissinstruments.com/dixell/index.htm

    This control will provide an air sensor for temperature control, a evaporator coil...
  24. Replies
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    1,297

    Good Morning boys! I had one of these where...

    Good Morning boys! I had one of these where simply the ice would not drop of the evaporator plate until it was almost completely melted. It made a full plate of ice and the harvest cycle heat was...
  25. Gee wis guys, I think your chasing your tail on...

    Gee wis guys, I think your chasing your tail on this one.

    500 # head pressure - Then he bled off one once, and the pressure dropped to 115 #, what he bled OFF was AIR.

    I had a similar problem...
  26. non condenseables in the system? if so check the...

    non condenseables in the system? if so check the outlet fitting at the expansion valve.

    Does this system use a liquid line solenoid?
  27. Thread: refer vans

    by kerndt
    Replies
    16
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    1,629

    Rail, when you plug these units in the main...

    Rail, when you plug these units in the main electrical load,(compressor, fans etc...)don't start up the second you plug it in, there is some delay for the contactor etc..., thus your plugs are...
  28. Replies
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    1,413

    I agree with K-Frige on the defrost time, this...

    I agree with K-Frige on the defrost time, this system must terminate defrost via the defrost termination/fan delay switch. Now a normal defrost cycle should only last about 20 minutes, and then...
  29. Replies
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    1,141

    Insulate the oil separator, it needs to be warmer...

    Insulate the oil separator, it needs to be warmer than any other part of the discharge side of the system. Many low temperature manifactures insulate their separators, simply to prevent liquid...
  30. Replies
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    2,537

    Good to here, you got to love the man. I always...

    Good to here, you got to love the man. I always ask about him when i talk to Earl.

    Where are all you ultralow guys located?

    Any of you being taken over or beat up by Thermo yet?
  31. Replies
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    1,642

    Auser, I will say good luck, because I have very...

    Auser, I will say good luck, because I have very little exposure to the New Brunswick ultra-low. I have three of them so far in my service area, and only one failure, (oops that a 33% failure rate)...
  32. Replies
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    1,642

    Auser I have serviced the ultra low market for...

    Auser
    I have serviced the ultra low market for the past 26 years. Being a factory authorized service representative for 22 years. I agree that your service company would be suspect. Even if there...
  33. Replies
    43
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    6,292

    Pecmsg I agree, old time refrigeration guys never...

    Pecmsg I agree, old time refrigeration guys never used and off cycle timers for defrost. We rarely used thermostats; we used pressure controls to set temperature and to maintain a clear coil. Now...
  34. Replies
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    958

    Frio, thanks Thermotron doesn't support this...

    Frio, thanks
    Thermotron doesn't support this controller anymore, I'm hoping some may have a copy of the drivers etc...
  35. Replies
    2
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    958

    I have a unit with a 5000 series controller on...

    I have a unit with a 5000 series controller on it. It lets you have local control and remote control. Does anyone have information on the remote side of this system. I'm wondering if the remote...
  36. Replies
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    2,842

    I think gbfromsd got it. bwal2 was on right track...

    I think gbfromsd got it. bwal2 was on right track asking if new refrigerant.

    In just reading the post first, without reading the responses, my first thought was the system has non-condensables in...
  37. Replies
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    1,019

    Vets, i can't really spell either. My trick is,...

    Vets, i can't really spell either. My trick is, that i type in Word XP, then copy and paste it here.
  38. Replies
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    1,019

    Good try vets, but i think ice will form at the...

    Good try vets, but i think ice will form at the outlet. Can you say spell check.
  39. Replies
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    9,289

    If you opened the potential relay, and physically...

    If you opened the potential relay, and physically saw that the coil is burnt, this is only due to over voltage going to the coil. Its cause could be an open run capacitor or wrong run capacitor or...
  40. Replies
    10
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    1,019

    Oil is moving through the refrigeration system is...

    Oil is moving through the refrigeration system is normal; it doesn't just "escape" due to high pressures.

    Oil restricting the cap tube should only be a momentary thing as it will pass. I don't...
  41. Replies
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    2,080

    Watlow F4 controller. Dual process controller,...

    Watlow F4 controller. Dual process controller, it can handle both temperature and humidity. Auto tuning, 5 sets of PID values can be programmed in for different temperature operations. Aux boost...
  42. Replies
    6
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    867

    I agree with an oil separator or two separators...

    I agree with an oil separator or two separators in series with each other the coalescent type (temperite). With the separators, your oil migration into the evaporator will be greatly reduced, but it...
  43. Thread: Flood Back...

    by kerndt
    Replies
    6
    Views
    870

    Some control logic only allows the system to pump...

    Some control logic only allows the system to pump down before defrost, then locks out the compressor during defrost cycle. This prevents excess current draw, by not allowing the heaters and the...
  44. Replies
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    4,838

    Is the compressor intermittently tripping off on...

    Is the compressor intermittently tripping off on the internal overload after defrost?

    What is your cut-in and cut-out pressures?
  45. Thread: txv bulb

    by kerndt
    Replies
    9
    Views
    1,148

    Txvís maintain a constant superheat in the...

    Txvís maintain a constant superheat in the evaporator (its not called liquid level). The txv will adjust to keep the evaporator 100% efficient during lower(65 to 80F) or higher (95 to 120F) ambient...
  46. Replies
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    4,151

    Shophound, I agree with all you stated including...

    Shophound, I agree with all you stated including the drier (whatís $10.00).

    If it were me, brazing, (with nitrogen) not solder.

    Vacuum, 500 microns, and with a good blank off, 1 or 2 hours. I...
  47. Replies
    18
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    2,330

    grodan1 I canít believe anyone would leave...

    grodan1

    I canít believe anyone would leave nitrogen in the system, without locking out the compressor circuit. How did you determine its nitrogen in the system?

    With equal pressures hi and low...
  48. Thread: text bookl

    by kerndt
    Replies
    4
    Views
    826

    Norm, Its good to see your name again.

    Norm,
    Its good to see your name again.
  49. Thread: BIG DILLEMA

    by kerndt
    Replies
    79
    Views
    6,012

    I wonder what R11 tastes like eddy, because if...

    I wonder what R11 tastes like eddy, because if this stuff gets into the ground, itís only going to coming out in your drinking water. With such a hack job in their recovery, I'll bet there's a lot of...
  50. Thread: BIG DILLEMA

    by kerndt
    Replies
    79
    Views
    6,012

    Acjourneyman I have to agree with you. ...

    Acjourneyman

    I have to agree with you.

    The property own will also be responsible.

    Like you said, if this guy burnt a house down, because he is a hack, he doesnít need to be in the trade....
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