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  1. Replies
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    Correct Ryan

    Correct Ryan
  2. Replies
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    560

    Came back and checked my code. 1sq"/7000btu

    Came back and checked my code. 1sq"/7000btu
  3. Replies
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    560

    Amount of fresh air required

    Not carrying my Ontario B149 in the truck today. Just looking for a quick answer.
    What is the fresh air required for 600,000btu?
    Thanks in advance
  4. Replies
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    339

    www.google.com

    www.google.com
  5. Replies
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    475

    Some basic info would help us help you Pressure...

    Some basic info would help us help you
    Pressure @ freeze cycle and harvest cycle
    inlet water temp
    freeze and harvest times
    Actually your production seems pretty good

    You say you only get 10lbs...
  6. Replies
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    617

    sounds like the TXV is bad Was it sweat or...

    sounds like the TXV is bad
    Was it sweat or flare?
    If it's sweat did you wrap it before brazing? (Be honest)
    is the bulb mounted in the correct position? ( 7 or 5 o clock on outlet of evap outlet)...
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    Would have recovered, changed drier, evacuated to...

    Would have recovered, changed drier, evacuated to 500 microns, charged with 409a to name plate (probably on left inside cooler) if no nameplate charge to 10F superheat. If there was a restriction in...
  8. Lucky.....

    Lucky.....
  9. Industrial grade Nitrogen has 7.3PPM of moisture...

    Industrial grade Nitrogen has 7.3PPM of moisture
    Carbon Dioxide has 11.3PPM of moisture
    I really dont see how 4ppm could make a difference
  10. so how much moisture is in nitrogen>? and why is...

    so how much moisture is in nitrogen>?
    and why is IT so good for purging?
  11. Sounds like C02 as a purging/pressure test tool...

    Sounds like C02 as a purging/pressure test tool gets a failing grade.
    Maybe I should make the switch.
    I just purchased a new micron gauge and 1/2 evacuation manifold with 1/2 hoses!! (in the mail)...
  12. Replies
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    Good thread everyone!

    Good thread everyone!
  13. Replies
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    1,374

    A12-1560 works EVERY time

    A12-1560
    works EVERY time
  14. Replies
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    1,374

    The A12-1560 is meant to have contact with the...

    The A12-1560 is meant to have contact with the coil.
    You must weave it through the coil.
    Despite what they say a defrost clock is NOT required. With a constant cut in of 38F the coil will never...
  15. Can you back this up with evidence? It cant be...

    Can you back this up with evidence?
    It cant be that bad if there is a big push for c02 as a refrigerant.
  16. Using CO2 as a purging gas instead of Nitrogen

    Does anyone use c02 to purge with while welding instead of nitrogen?
    Is nitrogen drier? or is c02?
    We have a tank of c02 for blowing out condensers and have always used c02. I have never really...
  17. Replies
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    Any pictures of that rig??

    Any pictures of that rig??
  18. Replies
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    2,288

    Fantastic reply! Guys like you are what this...

    Fantastic reply!
    Guys like you are what this trade needs.
    You gave me a clear answer with ways to improve.
    Thanks
  19. Replies
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    2,288

    Parallel Vacuum Pumps

    I have thought of making a fitting to pair two vacuum pumps together with some copper tube.
    Something I could easily connect when I want a really quick good vacuum when I only have 2 places to...
  20. Replies
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    Found this with a simple google search ...

    Found this with a simple google search

    http://www.partstown.com/masterbilt/mb19-13822
  21. Replies
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    1,374

    I use Ranco A12-1560 and have never had an issue...

    I use Ranco A12-1560 and have never had an issue with a new stat. You must weave the stat through the evap when installing. It has a constant cut in of 38F and an adjustable range from 19F-29F.
  22. Replies
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    May not be related but be sure that inlet water...

    May not be related but be sure that inlet water temp is above 45F if it is below this you may not be picking up enough heat during the freeze cycle. I have had this happen once but for the most part...
  23. Replies
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    Can you send it to jwmmccoy@gmail.com ? Much...

    Can you send it to jwmmccoy@gmail.com ?
    Much appreciated
  24. Replies
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    Do you have a copy of this? I did a quick test...

    Do you have a copy of this?
    I did a quick test on the roof but cant remember what steps should be first
  25. Replies
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    Thanks dandyme I assumed I would be replacing...

    Thanks dandyme
    I assumed I would be replacing the motor. To often in our trade we replace entire parts (ie. a Motor) when something small can be replaced instead. As a new-ish tech I am always...
  26. Replies
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    I tested the DC volts on the sensor while I...

    I tested the DC volts on the sensor while I turned the motor.
    If I remember correctly it should produce 10-20DCV
  27. Replies
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    Ill provide pictures when I go back. My gut tells...

    Ill provide pictures when I go back. My gut tells me that it is factory installed.
  28. Replies
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    That motor is different from the one I have. The...

    That motor is different from the one I have. The centrifugal switch is INSIDE the motor not mounted on the outside like the pictures you provided. I have seen lots of motors like that (Trane and...
  29. Replies
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    Yes I am aware that this is the ceterfugal...

    Yes I am aware that this is the ceterfugal switch. Again my question is how to remove it. I was hoping another tech has done this before with a similar motor.
  30. Replies
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    Optimal Condensation Temp

    What in your opinion is the optimal temperature for a water cooled system.
    Keep in mind $$$
  31. Replies
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    double check the part number. The part I have is...

    double check the part number. The part I have is a 50Hj442730 (direct from carrier)
    That is not the issue.
    My question is, how do I remove it.
  32. Replies
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    Yes it is the right part I didnt change...

    Yes it is the right part
    I didnt change everything because the motor is only 2 years old
  33. Replies
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    Carrier calls it a Hull Sensor Also has 3-...

    Carrier calls it a Hull Sensor

    Also has 3- wires Black Red White

    Plugs into the board
  34. Replies
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    Combustion blower question

    Hey There
    I am working on a Carrier RTU M#48ss-030080521AA

    No heat call
    Diagnosed a bad centrifugal switch on the combustion motor.
    Ordered switch. Went to replace today and for the life of me...
  35. Yes youre right!! how embarrassing! I will total...

    Yes youre right!! how embarrassing! I will total all units and re-check the tonnage. I think I mixed up jobs!
    assuming I am wrong (which I think I am) cooling tower seems the way to go?
  36. Im using Comfort Aire spec. With 1700 tonnes of...

    Im using Comfort Aire spec. With 1700 tonnes of cooling when the water is @ 70F the units use 1.35 GPM/ per tonne.
    1.35GPM x 1700 tonnes = 2295 GPM

    You were right to correct me on the GPM. The...
  37. Someone asked why I thought a cooling tower was...

    Someone asked why I thought a cooling tower was the wrong choice.

    I have very little experience with these so correct me if I am wrong. Wouldnt a cooling tower have to be MASSIVE to reduce the...
  38. Optimal temperature for water cooled units is 65F...

    Optimal temperature for water cooled units is 65F inlet (as per Comfort-Aire specs)
  39. The temperature in the plant does not go below...

    The temperature in the plant does not go below 70F in the winter. Right now they are using city water. Very expensive!
  40. I was referring to the inlet and outlet temps of...

    I was referring to the inlet and outlet temps of the A/C units.
  41. Questions regarding water cooled A/C and high water bills

    Hi there!

    I want your recommendation on reducing a water bill at a factory I service.

    They currently have 45-50 water cooled units totaling approximately 1700 tonnes of cooling. In the summer...
  42. Replies
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    Call Carlyle with the M# never use rule of thumb

    Call Carlyle with the M# never use rule of thumb
  43. Never ever be concerned with asking a stupid...

    Never ever be concerned with asking a stupid question. You are an apprentice .... and anyone who chastises you for a dumb question isnt worth working for.
    Welcome to the trade!!
  44. Replies
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    I always go with 10F TD. It sounds like you have...

    I always go with 10F TD.
    It sounds like you have a pretty good handle on the PT chart.
    Whenever possible I NEVER use low pressure to control temperature when the unit contains R22. I find that...
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    Inlet water temperature should not be any lower...

    Inlet water temperature should not be any lower than 45f
  46. Replies
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    We recently had a problem at a grocery store...

    We recently had a problem at a grocery store where half of the coil would freeze up. We found that the filter for the ambient air curtain was plugged solid. The cold air would drop to the floor,...
  47. Gotcha! I wont waste my time then. I did make a...

    Gotcha! I wont waste my time then. I did make a modified potato gun into a golf ball canon... works REALLY well...almost too well :)
  48. Is this based on assumption or have you tried...

    Is this based on assumption or have you tried this?
  49. A golf ball fits perect inside of SRD-21 I...

    A golf ball fits perect inside of SRD-21
    I wonder how well that would work.
  50. Thread: My Shame

    by KickedGinger
    Replies
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    1,141

    My Shame

    Today I cross threaded a new gas valve on a tube heater....
    Hard to get at... a huge dust collector in the way. 20 ft inside of a sky jack.....Tighten everything down, check for leaks.....SH*T its...
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