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Thread: 404a/507

  1. #1
    Join Date
    Jan 2001
    Posts
    765

    404a/507

    I have a machine using 507c. can I use 404a in its place without changing oil,txv etc.

  2. #2
    Join Date
    Mar 2008
    Location
    Banana Republic,Florida
    Posts
    400
    never heard of 507c i have heard of 507 and i have never changed gas on a ice machine if its been running on 507 why change???
    Mastic its whats for dinner!

  3. #3
    Join Date
    Mar 2008
    Location
    Banana Republic,Florida
    Posts
    400
    maybe 407-c??
    Mastic its whats for dinner!

  4. #4
    Join Date
    Jan 2001
    Posts
    765
    have to replace evap coil on this self contained cooler. It blows cold air on patient at doctors office. athe compressor has 404 and 507 stamped on it. it currently runs on 507. we have a full jug of 404. I hate to buy a full jug of 507 for 33 ozs. the factory subcontractor says it is ok.wasnt sure

  5. #5
    Join Date
    Dec 2004
    Location
    Yuba City, CA.
    Posts
    254
    It really comes down to what your metering device is set up to work with. If the metering device is rated for 404a then I would say no problem.
    I will enter His gates with thanksgiving in my heart.

  6. #6
    Join Date
    Nov 2009
    Posts
    385

    NEED MORE INFO

    Is the metering device a TEV or cap tube?
    "Don't wish it were easier, wish you were better"

  7. #7
    Join Date
    Jan 2001
    Posts
    765
    txv compressor is stamped 507and404a

  8. #8
    Join Date
    Nov 2009
    Posts
    385
    If you change the TEV element (powerhead) to the correct one and adjust the valve superheat it will work just fine. Although it seems like a lot of unnecessary work. IMO. Good luck.
    "Don't wish it were easier, wish you were better"

  9. #9
    Join Date
    Jun 2005
    Posts
    171
    The P/T chart for 404A and 507 are close enough but not sure if both use the same refrigerant oil. Have you tried to call the Manufacturer or Tech Support?
    If we evolve from the monkey then why are there still monkeys.

    GOD Bless America.

  10. #10
    Join Date
    Sep 2007
    Location
    NH
    Posts
    1,157
    It will work fine I promise. If the TXV says 404a/507 and the compressor says 404a/507 then whats the problem???? Both use POE oil which is what comes in that compressor.

  11. #11
    Join Date
    Nov 2009
    Posts
    385
    Both gases use the same tev element for low temp. For medium they are different. For example: a sporlan tev valve will use a "PC" charge for medium temp 507 and an "SC" charge for medium temp 404a. Other than that it will be fine.
    "Don't wish it were easier, wish you were better"

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