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Thread: R404a and low side pressure under load

  1. #1
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    R404a and low side pressure under load

    hey guy just wondering of any one knew or knew where i could find the proper low side pressure using r404 in a prommie under load. I think I need to add a tad bit more refridgerant because under load at 2.3 volts the evap temps drop drasticly and keep rising. yet under load on stock voltage I get may a 1-2 c rise in temps. If I remember correctly we saw about 0 on the low side before.
    Thanks in advance
    Bryan
    eocf newbs own, as does linx

  2. #2
    X.I.P. CodeRed's Avatar
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    0" was the low side pressure that I used too. I also have the same probs with holding the temp at really high heat loads.

    Dont know what the best value really is

  3. #3
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    well i am gonna have him come out and fill her up while i put a 2.3 load on it and prime. I am gonna see here i guess
    eocf newbs own, as does linx

  4. #4
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    well i am at -10in hg underloads and seems to be the ticket. who knows though
    eocf newbs own, as does linx

  5. #5
    Registered User Merenfreak's Avatar
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    -10 ? What value do you mean ?
    I wana refill my prommy next week.

    cya
    XP2400+@2845Mhz Prommy chilled

  6. #6
    Xtreme Addict bowman1964's Avatar
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    Originally posted by Merenfreak
    -10 ? What value do you mean ?
    I wana refill my prommy next week.

    cya
    he is refering to the high and low pressure reading of the compressor.

    -10 means the low side (suction side) of the compresser is pulling 10 psi of vacuum.so it would say 10in hg.
    Last edited by bowman1964; 05-23-2003 at 07:55 AM.

  7. #7
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    does that sound right to you bowman?
    I know you know a tad bit about this stuff
    eocf newbs own, as does linx

  8. #8
    Xtreme Addict bowman1964's Avatar
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    well i am at work so i am only guessing.but -10 or 10 inches of vacuum with r404a should give evaperator temps of below -55c now that is the temp the freon is evaperating at...not the cpu or block temp

  9. #9
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    yea you are corect my sig shows the evap load temp.
    eocf newbs own, as does linx

  10. #10
    Registered User Merenfreak's Avatar
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    @ Rabeb25

    How much freon did you fill in or started with ?

    cya
    XP2400+@2845Mhz Prommy chilled

  11. #11
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    started with nothing, sucked it all out, ended up putting in.... who knows...heh
    sorry
    Bryan
    eocf newbs own, as does linx

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