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Thread: One for the fridgies

  1. #291
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    Got a good look at my first trans-critical CO2 supermarket installation today, just being commissioned. We'll be providing emergency service back up.

    Medium temp coils are fully flooded, superheat varies between 0 & 2k!!!
    And up to 90bar on the high side???!!!
    Discharge lines and manifold out of the MT Rack is stainless, not copper.

    Oh lordy! One for the fridgiesOne for the fridgiesOne for the fridgies

  2. #292
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    Why do I get the impression you just had a monster orgasm?

  3. #293
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    Quote Originally Posted by 4bee View Post
    Why do I get the impression you just had a monster orgasm?
    You can see from there?
    If you don't like trucks, stop buying stuff.
    http://www.aulro.com/afvb/signaturepics/sigpic20865_1.gif

  4. #294
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    Quote Originally Posted by rick130 View Post
    Got a good look at my first trans-critical CO2 supermarket installation today, just being commissioned. We'll be providing emergency service back up.

    Medium temp coils are fully flooded, superheat varies between 0 & 2k!!!
    And up to 90bar on the high side???!!!
    Discharge lines and manifold out of the MT Rack is stainless, not copper.

    Oh lordy! One for the fridgiesOne for the fridgiesOne for the fridgies
    Geez,i dunno if an old dog wants to learn new tricks

    i am hoping 404a,134a,22,407c,410,r32 will see me out

    i was actually pleased with myself the other day,rewired an old 9Kw R22 split to suit a Hyper Eng soft start,love job as well.

    Haven't done one for years

    An it went like it was new.

    On another subject,anyone seen the new model Mitsy Electric splits?
    They look like those first Daikins that had wall controllers,box shaped.
    I don't think it will be long before they are back to a rounded shape.
    What were they thinking?

  5. #295
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    Orgasm's aside, there is some serious stuff involved with these systems! It involves a whole new way of thinking about what you can and cannot do!

    CO2 as a Refrigerant — Introduction to Transcritical Operation - Climate Conversations

  6. #296
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    So how is WH&S working at over 1000 PSI ?

    Commissioning and setting up the HP cut outs would be fun

    I can see the apprentice "i just destroyed my new HP gauge,just gotta duck down to the wholesalers to grab another"

  7. #297
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    Quote Originally Posted by V8Ian View Post
    You can see from there?

    It probably was Rick, as Woomera apparently is not launching these days so it couldn't have been them.

  8. #298
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    Quote Originally Posted by scarry View Post
    So how is WH&S working at over 1000 PSI ?

    Commissioning and setting up the HP cut outs would be fun

    I can see the apprentice "i just destroyed my new HP gauge,just gotta duck down to the wholesalers to grab another"
    They proof strain the system at 105 bar, it went BANG!
    Someone installed a 45 bar (low side) pressure relief valve in one line by mistake!
    The commissioner said it was a tad loud when it went off!
    He thinks you would have heard it all over town...One for the fridgiesOne for the fridgies

  9. #299
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    Quote Originally Posted by 4bee View Post
    Why do I get the impression you just had a monster orgasm?
    Nor quite Desmond, it scares the begeezuz out of me!
    The lists of 'dont's' is long!
    Including do not isolate anything, do not adjust a setting under any circumstance.
    Do not add refrigerant (CO2) after a gas leak as it's a critical charge, it's a specific charging sequence as this System has in effect two vessels (receivers) and liquid levels are indeed critical to operation, and on it goes.

  10. #300
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    Quote Originally Posted by Old Farang View Post
    Orgasm's aside, there is some serious stuff involved with these systems! It involves a whole new way of thinking about what you can and cannot do!

    CO2 as a Refrigerant — Introduction to Transcritical Operation - Climate Conversations
    What I'm used to is a CO2 cascade, R134a on the medium temp side, CO2 low temp with a heat exchanger between them.
    Having a full trans-critical setup is interesting!
    There is no condenser, its a gas cooler. I called it a de-superheater as I reckon that describes it more accurately.
    And it incorporates old school features, it has a fully computerised fogger/water spray setup to keep temps under control on the hot gas cooler above 30°!

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