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Type: Posts; User: clearchris

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  1. Replies
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    Unless your target market is teenagers or college...

    Unless your target market is teenagers or college students, facebook is overrated. My 2c.
  2. I just studied the book that came when I signed...

    I just studied the book that came when I signed up for the test. Pretty easy, even when I hadn't ever touched refrigeration before.

    Just realize when you study, the test doesn't test you on how...
  3. You can take type 1 online, open book. If you...

    You can take type 1 online, open book. If you want to take type 2 and 3 again, it has to be proctored. I don't believe you have to take core again.
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    Yeah, that's what I'm starting to suspect might...

    Yeah, that's what I'm starting to suspect might be the case.

    If the beads are held tightly, do they make noise under moderate tapping?

    My intuition says that if the beads are free to move...
  5. Damn. Read the whole chapter on TXVs and missed...

    Damn. Read the whole chapter on TXVs and missed that. Going to have to go back to that one again. Thx.
  6. True. Ack. Pressure would keep rising from...

    True.

    Ack. Pressure would keep rising from the evaporator coil until it reached equilibrium, which would happen pretty quickly without the compressor pulling the vapor out. Then the TEV would...
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    Well, yes, but the pathway to NO isn't usually...

    Well, yes, but the pathway to NO isn't usually directly from n2. I'm not a chemist, but there's probably levels of reactivity.

    Also true, you take away the h2o and there's no acid. But isn't it...
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    cap tube filter sounds like maracas

    So I poke the filter leading to the cap tube on this system, there is so much sand/whatever in there it sounds like I'm playing the maracas.

    The filter media for refrigeration systems is solid,...
  9. tev theory - what happens with compressor off?

    It seems to me that if you had a full size receiver and accumulator, that the low side could operate and remain cooling after the compressor shuts off if there were a check valve on the suction line...
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    Co2 is not inert. Co2 + H2O = carbonic acid. ...

    Co2 is not inert.

    Co2 + H2O = carbonic acid. If there is any moisture in the system you are forming acids in there.

    http://en.wikipedia.org/wiki/Carbon_dioxide

    HVACR isn't cheap. This...
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    How about a flatbed trailer? I borrow one from a...

    How about a flatbed trailer? I borrow one from a buddy when I need it. Otherwise, u-haul rents them for 20$ a day. It's nice to be able to pull it up to a loading dock and have them use the...
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    If you are talking about hoses with low loss...

    If you are talking about hoses with low loss fittings, they are exactly that "low loss". I haven't seen a hose with a schrader valve.

    You have to purge the hose anyway.
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    Np. Look up PSIA and PSIG. It's hard to...

    Np. Look up PSIA and PSIG. It's hard to understand anything in refrigeration without understanding that 14.7 psia = 0 psig = 1 atmosphere.
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    BTW, beat this into your head. Zero psig does...

    BTW, beat this into your head. Zero psig does not mean empty.

    Why is this an important distinction?

    If you braze on an "empty" system that's at 0psig and sealed you are going to get an...
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    Not true. Even at 0 PSIG, there's still 14.7...

    Not true. Even at 0 PSIG, there's still 14.7 pounds of pressure from refrigerants in the system. Depending on the size of the system, that could be a lot of refrigerant.

    You might correct that...
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    If a system is leaking, generally refrigerant...

    If a system is leaking, generally refrigerant goes out because system pressures are higher than atmospheric pressure. There are some exceptions, such as chillers which run below 14.7psia (0 psig).
    ...
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    Yeah, I changed mine from LP to nat gas. A bunch...

    Yeah, I changed mine from LP to nat gas. A bunch of orifices, pilot and some small valve parts ran about 100$ shipped from partstown. Like EB says, I think you can get the valve part separate. Be...
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    The serial number is JA0995. I think it means it...

    The serial number is JA0995. I think it means it was made in 95. The newer models use a TXV.
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    I didn't have a problem with a minimum order. I...

    I didn't have a problem with a minimum order. I showed up with a list of parts that I needed, some were obsoleted and replaced with newer parts numbers. They helped me find the newer part numbers...
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    I understood that capillary tube (critical...

    I understood that capillary tube (critical charge) systems were a risk of slugging the compressor if there's too much refrigerant. How much is that generally? There's three coils in the suction...
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    I like the idea of the CAPT-032s. I didn't add...

    I like the idea of the CAPT-032s. I didn't add one because I couldn't get the flare fitting off, have any tricks for that? Should I hit it with a torch to heat it up and loosen it? If it weren't...
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    High Side Low, Low Side Low

    La Rosa Ice Cream Dipping Station struggling to hold temperature.

    I cleaned the condensor coil (filthy) with nubrite and painted with coil paint.
    Recovered refrigerant, pressure tested to 150psi,...
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    I have found that hobart has put up a lot of...

    I have found that hobart has put up a lot of manuals / schematics on their web site recently. It might be worth it to look again. I believe it is hobartcorp.com

    A lot of their products have had...
  24. Oh two other items. I'm not worried too much...

    Oh two other items.

    I'm not worried too much about my time into this, as I'm chalking it up to my education.

    I hold an EPA 608 Universal Certification and the required local licensing.
  25. Jordon Worktop 2 Door Cooler - Fixable?

    I have a Jordon Worktop 2 Door Cooler that came into my possession for nearly nothing. Build quality is pretty good, it has the thickest insulation I have seen.

    I'm trying to determine if this...
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