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  1. #1
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    Oil Type for HSN



    Hi
    In bitzer document for R=404A has BSE 170
    pour point of this oil =-28
    if we want ti run Evaporator SST = -45
    Condenser SDT = +45
    still document is showing BSE 170

    can we use SL 32
    Pour point = -48

    thanks
    MBC



  2. #2
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    Re: Oil Type for HSN

    Hi
    waiting for reply.
    Thanks

  3. #3
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    Re: Oil Type for HSN

    Bitzer document uses BS170 over range +7.5C to -50C

    Check docs here https://www.bitzer.de/gb/en/document...lng=en&lang=en
    Brian - Newton Abbot, Devon, UK
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  4. #4
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    Re: Oil Type for HSN

    Hi if you use thin oil, it won't seal the screws properly to pump,

  5. #5
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    Re: Oil Type for HSN

    Hi
    pour point of BSE 170 is about - 28
    our SSD is - 45 and Evaporator working all the time
    ( O2) system and we do not have a defrost to return oil
    I looked the docs in Bitzer it wrote BSE 170
    I put mail to them Bitter but ......
    some thing is not right

  6. #6
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    Brian_UK is offline Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
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    Re: Oil Type for HSN

    If you do not trust the manufacturer then you wont trust anyone else.
    Brian - Newton Abbot, Devon, UK
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  7. #7
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    Re: Oil Type for HSN

    Quote Originally Posted by GHAZ View Post
    Hi if you use thin oil, it won't seal the screws properly to pump,
    I don’t really agree on that entirely.
    Oil selection usually to do with evaporating temperatures so not to thick to return.

  8. #8
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    Re: Oil Type for HSN

    Hi
    Dear Brian
    I trust them and read all of docs in there's sits
    But I put this question to them
    first they wrote oil should be BSE 170
    When I told them about pour point they mailed me BSE32

    I did a lots work with HSN and used BSE 170
    ( more than 60 cold rooms )
    But all of them was cold rooms ( -35 c) with defrost system
    this one has not defrost so I am not sure about type of oil
    for R 134A they wrote -25 c

  9. #9
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    Re: Oil Type for HSN

    From My experience with Bitzer, Do not use any other oil.

    What is the compressor model?

  10. #10
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    Re: Oil Type for HSN

    Hi

    It is HSN 7471-75
    with ECO
    SST = -45
    SDT= 45
    R 404 A

    Before I used R 22 and oil were B100 it is mineral oil
    now I am going to use R 404 A

  11. #11
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    Re: Oil Type for HSN

    hi mbc,

    when you are reading the oil specifications, "In bitzer document for R=404A has BSE 170
    pour point of this oil =-28" >>> these -28 are for pure oil.
    in your system, refrigerant is mixed with oil and there is no problem in using BSE 170 at low temperatures.
    using iso32 oil you will get a high refrigerant concentration in oil at HP stage, low oil viscosity, and bad lubrification at bearings.

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