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  1. #1
    Join Date
    Nov 2012
    Location
    NYC
    Posts
    19

    HVAC to Refrigeration

    Hi, I have been working full time in HVAC for about a year and refrigeration interests me much more. Does anyone have any suggestions in what to study before looking searching for a job?

    Thank you very much

  2. #2
    Join Date
    Dec 2012
    Location
    Columbus OH
    Posts
    32
    Yes start with Ice Machines ,then reach ins, get involved with RSES very good place to start.
    Regards

  3. #3
    Join Date
    Jan 2010
    Posts
    6,311
    Yes, sequence of operation plays as equal a roll in the troubleshooting process. At least it sure does speed things up. If one starts at the end and then ends up at the beginning only to fine that the power is off. That sure is a waste of time.

  4. #4
    Join Date
    Jul 2011
    Location
    Lehigh Valley, PA
    Posts
    447
    I never accurately tracked, but I'd say electrical issues (including motors) are 50% or greater of the issues I see. In fact, hooking up my refrigeration gauges is the last thing I do. I'll use my Fluke 52 or my Fluke 116 much sooner.

  5. #5
    Join Date
    Mar 2009
    Location
    Mid-Mo
    Posts
    3,595
    You've already found your best resource. Get your post count up and go pro, then you can see all the good stuff.

  6. #6
    Join Date
    Nov 2012
    Location
    NYC
    Posts
    19
    Thank you very much techwizard and ryan

    I have looked into rses training materials in the past. Are you referring to the R/AC series of text books?

    I would very much like to go pro and read the educational forums

  7. #7
    Join Date
    Feb 2008
    Location
    California
    Posts
    2,066
    Read Heatcraft IOM, then get a job

  8. #8
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    A lot of stuff out there to read, IOMs, forums like this, text books, and such. I would hit them all. Experience is the best teacher and no substitute for time. Be patient and persistent. The first lesson is SLOW down. This side is a bit more critical then comfort cooling and gas and go tech crash and burn pretty quick. Learn the difference between symptom and problem and pursue the problem. Fix it and the symptom will likewise be corrected. Throwing charge at low pressure will get you in trouble. Good luck.

  9. #9
    Join Date
    Jul 2011
    Location
    Lehigh Valley, PA
    Posts
    447
    You haven't mentioned if you were commercial or residential HVAC. I find electrical knowledge & electrical troubleshooting skills of utmost importance when working in the commercial side of this business & this is especially true in refrigeration. Master your electrical skills. Good Luck

  10. #10
    Join Date
    Mar 2009
    Location
    Mid-Mo
    Posts
    3,595
    Quote Originally Posted by Capz View Post
    You haven't mentioned if you were commercial or residential HVAC. I find electrical knowledge & electrical troubleshooting skills of utmost importance when working in the commercial side of this business & this is especially true in refrigeration. Master your electrical skills. Good Luck
    I don't want to discount your statement about electrical knowledge, but I will have to disagree some. It doesn't take a genius to troubleshoot even a good size walk in refrigerator with a pumpdown system.

    I'd focus more on the sequences of operation to start with. What happens first and in what order it will happen. Once you know this, you can then evaluate what is missing and go from there.

  11. #11
    Join Date
    Jul 2011
    Location
    Lehigh Valley, PA
    Posts
    447
    Quote Originally Posted by ryan1088 View Post
    I don't want to discount your statement about electrical knowledge, but I will have to disagree some. It doesn't take a genius to troubleshoot even a good size walk in refrigerator with a pumpdown system.
    What's the purpose of your statement if you aren't discounting it? Sounds as if you are telling this kid he doesn't need to understand electric control circuits.

    I'd focus more on the sequences of operation to start with. What happens first and in what order it will happen. Once you know this, you can then evaluate what is missing and go from there.
    I certainly agree with this too. But having sound electric understanding is very important in my book. Maybe I think this way cause I have better electric skills & knowledge than the average guy. My first trade for years before learning refrigeration.

  12. #12
    Join Date
    Nov 2012
    Location
    NYC
    Posts
    19
    I do mostly light commercial but have done some residential and heavy commercial. We are actually working right now on a few residential apartment buildings with up to 70 apartments in one which we are installing a vrf systems in each apartment. The troubleshooting on these units are probably similiar to refrigetion since there are a lot of solenoid valves.

  13. #13
    Join Date
    Jan 2010
    Posts
    6,311
    True a walk-in cooler is straight forward. After that it can get pretty perplexing moving on to a freezer. If one does not have good electrical skills then he/she best be looking for the schematic.

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