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R404a Freezer cap tube to txv

Discussion in 'Refrigeration' started by coldsnap, Sep 26, 2017.

  1. coldsnap

    coldsnap -20 on the money

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    Location:
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    I have a hobart 1 door freezer, r404a with a 1/2 hp compressor, that I want to change to txv. This thing has been a problem child for us. I was thinking of using a c163 drier, outlet pointed down to act as a reciever. I would use a sporlan internally equalized valve, with an sz powerhead.
    I've only read about these conversions, never done one. Would a 1/4 ton be enough? I know @pecmsg has done these.
     
  2. pecmsg

    pecmsg Junior my ASS

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    1/4 or 1/3 should by fine but what do I know ......

    I learned from @crackertech
     
  3. mike1020

    mike1020 entitled millennial

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    You probably have about 1/6 of a ton
     
  4. coldsnap

    coldsnap -20 on the money

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    Location:
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    I will put in a EBQ valve body in so I can change the cartridge if needed then. I'll start with an AAA cartridge, I guess.
     
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  5. mike1020

    mike1020 entitled millennial

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    I went with too large of a cartridge on one and it hunted real bad and kept flooding out the coil and didn't work very good.
     
  6. 404eh

    404eh New Member

    Messages:
    196
    Never worked for me. Even with 3lb receiver, differant cartridges, fan blade for air flow, some dude said oh the compressors too small that's why a txv doesn't work. So I put in a bigger compressor, doesn't work
    I stick to captubes
    Drain accumulator, nitro purge, oil change
     
  7. frozensolid

    frozensolid Psychologist's Dream

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    Everyone I have ever seen with a TXV had a balanced port TXV. Slow pull down but they worked..
     
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  8. crackertech

    crackertech assholiness *

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    X2
     
  9. pecmsg

    pecmsg Junior my ASS

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    Page 6
     

    Attached Files:

  10. frozensolid

    frozensolid Psychologist's Dream

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    Copied from Sporlan valve manual.

    Balanced Port Design —
    Provides perfect pin and port alignment, and prevents changes in pressure drop across
    the valve from influencing Valve operation. Provides excellent control on applications with widely varying operating
    conditions.
     
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  11. coldsnap

    coldsnap -20 on the money

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    I only have a bq kit anyway
     
  12. mike1020

    mike1020 entitled millennial

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    I did one and I ended up having to go back and put a cap tube in
     
  13. pecmsg

    pecmsg Junior my ASS

    Messages:
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    Location:
    Eastern LI
    Clear the glass at or near temperature.

    IMG_4356.JPG
     
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