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  1. #14
    Join Date
    May 2014
    Location
    Bay Area California
    Posts
    21,803
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    Quote Originally Posted by timebuilder View Post
    I'm not familiar with "shingle" refrigeration.....or was that just a typo from autocorrect?
    I've heard that shingle Refrigeration can be painful.
    If you were a real tech, you'd solder a relay on that board and call it good to go.

    I do a triple evac with nitro to remove non condensables.

    I use 56% silver on everything except steel.

  2. #15
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    30,302
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    Quote Originally Posted by BBeerme View Post
    I've heard that shingle Refrigeration can be painful.
    I think there is a new vaccine for it, too. But, it can give you hot gas.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

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  3. #16
    Join Date
    Oct 2005
    Location
    B.C. Canada
    Posts
    1,169
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    Quote Originally Posted by timebuilder View Post
    I think there is a new vaccine for it, too. But, it can give you hot gas.
    My wife says my hot gas valve is stuck open..


    Sent from my iPhone using Tapatalk

  4. #17
    Join Date
    Oct 2005
    Location
    B.C. Canada
    Posts
    1,169
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    Probably just need a discharge muffler


    Sent from my iPhone using Tapatalk

  5. #18
    Join Date
    May 2018
    Location
    VA/DC
    Posts
    102
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    Quote Originally Posted by sprmktrefertech View Post
    Here's a little background;
    I'm currently working as a Supermarket refrigeration technician, but I'm sure you already figured that out from my username. I have been doing market work since my initiation into the union (12 years ago) and have worked on residential/ light commercial hvac for several years before that, my question is for those that have made the switch to commercial hvac and what I have to look forward to. Is it a big adjustment?
    as I tell my techs. a refrigerant circuit has the same function if its refrigeration to resi unit to a package unit. ( sure refrigeration is more complex at time) pressures sub cool super heat don't change. you need them for it to work. The biggest difference will be sequence of operation and how the unit is controlled. bottom line its not that hard to know. the one thing that's not hard to grasp is air flow. Those issues aren't typical in reefers.

  6. #19
    Join Date
    Apr 2008
    Location
    Tucson, AZ
    Posts
    281
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    I did 18 years in supermarkets and have now been in commercial for 6 years.
    I was surprised to find unlike a nice supermarket where they have a store plan on the mechanical room wall with schedules, sensor locations and such. Typical buildings have nothing. VAV boxes, controls and ductwork is a jumbled undocumented mess. You will be lucky is someone put a unit number on a thermostat.
    Also, where many supermarkets had most all the controls at the rack and a computer controller like CPC doing everything; building VAV controllers do their thing with just intermittent communication with the system. You have to figure things out sometimes when there is no interface available to see what is going on. Then you get into the water chillers, process chillers, big box car units and high security places where they watch you as you try to figure things out.
    I have found buildings just as complex as any supermarket with new things to learn constantly. Google and this site have saved me a few times. I never learned everything about markets and will surely die knowing only a small percentage of buildings' issues. Somedays I welcome just doing PMs on some little package units. The best thing about commercial is very few late night calls, time to think and see the family.

  7. #20
    Join Date
    Nov 2011
    Location
    East Side
    Posts
    5,925
    Post Likes
    Quote Originally Posted by mccann View Post
    I did 18 years in supermarkets and have now been in commercial for 6 years.
    I was surprised to find unlike a nice supermarket where they have a store plan on the mechanical room wall with schedules, sensor locations and such. Typical buildings have nothing. VAV boxes, controls and ductwork is a jumbled undocumented mess. You will be lucky is someone put a unit number on a thermostat.
    Also, where many supermarkets had most all the controls at the rack and a computer controller like CPC doing everything; building VAV controllers do their thing with just intermittent communication with the system. You have to figure things out sometimes when there is no interface available to see what is going on. Then you get into the water chillers, process chillers, big box car units and high security places where they watch you as you try to figure things out.
    I have found buildings just as complex as any supermarket with new things to learn constantly. Google and this site have saved me a few times. I never learned everything about markets and will surely die knowing only a small percentage of buildings' issues. Somedays I welcome just doing PMs on some little package units. The best thing about commercial is very few late night calls, time to think and see the family.
    SOOO true!! If I can find some blueprints for a building, it's like finding the Holy Grail....the skies open up, and bright light from heaven shines upon me!! LOL!! I have a building that I've been going to for over a year now. the Maintenance director has been there for 10 years, and knows pretty much nothing about the place.....they don't even bother to look at the BAS computer. on my last visit, I was nosing around in the mechanical room....I do this a lot...look on top of and behind things, peak into all the deep dark crevasses, etc.....anyway....I see a rolled up pile of dusty, torn paper in a corner....it couldn't be...but it was.....the entire Blueprint package!! It was like I hit the lottery....glad no one was watching while I danced around like a little school girl! In 15 minutes of looking through those pages, I learned more about that building than the people that have been caring for it for a decade!

  8. #21
    Join Date
    Apr 2008
    Location
    Tucson, AZ
    Posts
    281
    Post Likes
    That's awesome!

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