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Thread: Charging a 404a walkin freezer

  1. #61
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    Quote Originally Posted by metallica21156 View Post
    Going by serial its built in mid 70s. Floor is insulated.
    If there's moisture in the walls and floor it can take a couple days to refreeze it all. It's just something that happens to old freezers. I can think of one freezer in particular I work on that, if it went down and the ice in the walls melted, it would never get back down to temp. Here's a picture, it's garbage picture but it's the only one I've got. It's hard to tell in the picture, but the entire panel is full of water. The insulation is actually solid with ice.

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  2. #62
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    And the compressor is dyeing ever so slowly?

  3. #63
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    50% by the torch test. Not sure why its hunting yet which im currently investigating

  4. #64
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    It could be as the seals weren't in the best shape. Ive since resealed them. Any way to pull the moisture out? Id think over time the drier air inside the box would?

  5. #65
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    Quote Originally Posted by metallica21156 View Post
    50% by the torch test. Not sure why its hunting yet which im currently investigating
    Make sure the txv bulb is properly secured using the proper copper straps. (And make sure the txv is the correct one)

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  6. #66
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    I know bulb is secured correctly. As for identifying thats gonna be interesting. I know its a sporlan. Looks orginal to the evap.

  7. #67
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    Quote Originally Posted by metallica21156 View Post
    It could be as the seals weren't in the best shape. Ive since resealed them. Any way to pull the moisture out? Id think over time the drier air inside the box would?
    Nah, once moisture gets in, it doesn't come back out. It also displaces the blowing agent in the foam insulation. It'll still work, but it'll take a long time to get down to temp if you're trying to maintain below 32⁰f.

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  8. #68
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    If the walls/floor are compromised. I've had some real good luck w/ wrapping the box w/ thick plastic sheeting, caulking every external seam, covering the box w/ 4'x 8' x1'' or 2'' or even 4'' sheets of insulation boards.

    And as pecmsg asked, why is the txv hunting?

  9. #69
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    I can deal with that. Just need to figure out the hunting. When i get a chance I'll identify the txv

  10. #70
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    Is there an inlet screen in the TXV?

  11. #71
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    Not sure. Is a bolt in. Does have a new drier.

  12. #72
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    Quote Originally Posted by metallica21156 View Post
    Not sure. Is a bolt in. Does have a new drier.
    A bolt in ? as in a Take-a-Part w/ that separate/changeable "cage" inside the body?

    What color is the SG MI tablet?

  13. #73
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    Quote Originally Posted by metallica21156 View Post
    I know bulb is secured correctly. As for identifying thats gonna be interesting. I know its a sporlan. Looks orginal to the evap.
    Is there a liquid connection inside the box? If so make sure you don't have a big preasure drop across the liquid line. Does the txv have a strainer? If the txv has a strainer, start by cleaning it. Pump the system down at the king valve to 1-2 psi before you pull the strainer if it is the type that can be unscrewed. If it's in the liquid line going into the valve, I just change the whole valve.

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  14. #74
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    Quote Originally Posted by TechmanTerry View Post
    If the walls/floor are compromised. I've had some real good luck w/ wrapping the box w/ thick plastic sheeting, caulking every external seam, covering the box w/ 4'x 8' x1'' or 2'' or even 4'' sheets of insulation boards.

    And as pecmsg asked, why is the txv hunting?
    That's interesting, I was talking to a co-worker about doing just that a few days ago. What type of insulation boards did you use? The purple ones from home depot?

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  15. #75
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    Yup, Lowes, Home Depot, any one. It works for my crappy boxes.

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  17. #76
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    Quote Originally Posted by metallica21156 View Post
    Suction is 28. Super heat would go as low as 8 and high to 16. Sight glass is full. Liquid pressure was a little over 200.
    Where are you taking the SH Reading?

    How quickly would it rise and fall?

    It would be helpful posting all the information at one time.

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