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  1. Before you do anything, valve off your oil line...

    Before you do anything, valve off your oil line going from your reservoir to your compressors. I would pick a compressor and turn its equalizer line off if it has one. Bump it to see if it actually...
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    I believe 407c is a r22 retrofit for air...

    I believe 407c is a r22 retrofit for air conditioning. The difference between 407a and 407c? I would say different displacement at similar evap saturation temp i.e. difference in capacity. The...
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    3,391

    I was going to attempt to say something profound,...

    I was going to attempt to say something profound, but when I saw bicycle pic I forgot what I was going to say.
  4. If you are trying to remove a core that doesn't...

    If you are trying to remove a core that doesn't want to come out, try loosening the connection to the port slightly. Just enough that you have a little play but not spewing liquid. Then gently pull...
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    2,330

    I am with 2sac, Do you have a way of seeing if...

    I am with 2sac,

    Do you have a way of seeing if your compressor pulls into a vacuum?

    Looking at your subcooling and superheat (depending where you took your temp readings) the unit is...
  6. Replies
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    3,841

    Jim, The fact is that they are not comparable....

    Jim,

    The fact is that they are not comparable.

    The problem that myself and my refrigeration colleagues have, is that we can't justify buying $1500-$2000 worth of tools when we can do the same...
  7. I don't often get time to post on this site, for...

    I don't often get time to post on this site, for a variety of reasons. I just happened to stumble on this thread while doing some research for a presentation. I had a chuckle when I saw some posts...
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    Not really, because the suction pressure will...

    Not really, because the suction pressure will being to rise rather quickly to equilibrium with the ambient temp within the case. That is pressure converted to temperature. It becomes the pressure...
  9. Replies
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    510

    Just out of curiosity, do you have a split...

    Just out of curiosity, do you have a split condenser or heat reclaim? I would close your outlet from your receiver to see if your needle/reading moves towards 100%. Replacing a level float is not...
  10. No problem man. If your coils look good now,...

    No problem man.

    If your coils look good now, I wouldn't worry about it.
  11. Sounds like you had the wrong size nozzle...

    Sounds like you had the wrong size nozzle originally. Google this Heatcraft manual, H-IM-64J. It will explain how to properly size the nozzle

    The nozzle is not a metering device like a TXV. It...
  12. Replies
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    744

    Ditto on this, You need to spread out your...

    Ditto on this,

    You need to spread out your defrosts. I would go 3 to 4 a day 30-40 mins for electric defrost.

    I would check to make sure that your fan klixons are working so you can chill your...
  13. Replies
    9
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    847

    First check the obvious, honeycombs, fans...

    First check the obvious, honeycombs, fans working, check strainers if applicable. Not knowing how far your condensing unit is from the cases, I would go ahead and put ports on your evaporator...
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    Dude I said nothing about resetting, read the post

    Dude I said nothing about resetting, read the post
  15. Replies
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    1,879

    When the PID for that particular circuit...

    When the PID for that particular circuit calculates that setpoint has been reached, the CDS should be at 0%, unless otherwise specified. Usually when the this valve fails it is usually due to a...
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    3,098

    A TXV and receiver go hand in hand to compensate...

    A TXV and receiver go hand in hand to compensate for varying load conditions. Since a cap tube system is designed to handle a specific load at a specific pressure drop, I don't know how adding a TXV...
  17. Replies
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    680

    If it is a Copeland compressor, you can register...

    If it is a Copeland compressor, you can register at Emerson Climate Technologies' page, if you have a labtop or computer. Once you do, you have access to the OPI portal where get performance data if...
  18. Replies
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    979

    I believe if you go to the Emerson OPI page and...

    I believe if you go to the Emerson OPI page and select the compressor model number you desire, it is under "Performance". It shows you various data points per evaporating and condensing temperatures.
  19. Replies
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    9,831

    I haven't had my hand on a supermarket CO2 system...

    I haven't had my hand on a supermarket CO2 system yet. I was told by HP rep they spec out their CO2 systems with EEVs. I would like to see what a CO2 TXV powerhead looks like:whistle:
  20. Replies
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    2,653

    True, but the 3/8 are easier to maneuver.

    True, but the 3/8 are easier to maneuver.
  21. Replies
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    2,653

    Blue Vac, two Appion core remover tools, J/B 5...

    Blue Vac, two Appion core remover tools, J/B 5 cfm pump, two 3/8" vacuum rated hose, bottle of nitrogen. Quickest evacuation
  22. Replies
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    I agree

    I agree
  23. Replies
    122
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    9,831

    Arguing to what is superior based on who has the...

    Arguing to what is superior based on who has the "market share" of what sector is a mute argument. OEM's two biggest concerns are cost and energy consumption. The end user is mostly concern with...
  24. Replies
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    924

    Good time to get all the special projects done

    Good time to get all the special projects done
  25. Replies
    122
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    9,831

    Have two Sporlan valves from 1965 still in...

    Have two Sporlan valves from 1965 still in operation in a supermarket air handler. Still going strong. Hussmann, Hill Phoenix, and Kysor still use them for a reason. Go in front of the RSES...
  26. Replies
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    Hello y'all, sorry been busy...thanks for the...

    Hello y'all, sorry been busy...thanks for the replies

    Talking mainly about supermarket/commercial refrigeration. Was talking to someone who had taken the CMS test and said there was a question...
  27. Replies
    7
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    Unloaders on low temp envelope

    Hello, has anyone seen documentation or know why unloaders should not be installed on a low temp compressor. Thanks.
  28. Replies
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    In response to the original posting, I...

    In response to the original posting,

    I understand your husband's plight, having originated from Chicago. The job market up there is tight as compared to other places, i.e. Texas, the Southeast. ...
  29. Replies
    3
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    510

    E2 "Reclaim In"

    Hello everyone. My question is about the E2 Condenser control app. What is the strategy behind the "HEAT RECLAIM IN" I understand this is an input that is activated when the heat reclaim is staged...
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    813

    24# final suction press. I have to add the box...

    24# final suction press. I have to add the box did get to 35 degree which is where the stat is set. I watched it after the kitchen closed while I was working on an ice machine. It seems the only...
  31. Replies
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    813

    Bad evaporator coil?

    I have a question that I think I know the answer to but I would like the advise of fellow members of the trade.

    I have a walk in cooler that runs on 12 with a evaporator that is looks pretty beat...
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