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  1. #1
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    Red face R-404a running pressures


    hi can anyone tell me the approx running pressures for R-404a on an upright freezer. its been a while since i last used this gas. cheers dougie.



  2. #2
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    Re: R-404a running pressures

    hi dougie,
    i tend to run suction at around 0.7/1.4bar and as long as the hp is below 15bar it should be okay but it really depends on the case.

  3. #3
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    Re: R-404a running pressures

    it depands on the evaporation temperature...
    if evaporation temperature is -40 C then suction pressure is around 1 - 3 psig and condensing pressure around 200 psig.

    if evaporation temperature is -25 c then sp might be approx. 10-12 psig and condensing presssure might be up to 220-240 psig.

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