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  1. Replies
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    In bigger freezers, like drive-in... See how many...

    In bigger freezers, like drive-in... See how many armaflex tubes you can get inside of your jacket ;) The body heat will keep'em warm.
  2. Replies
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    Sticky: It seems that there's no resellers for Veto Pro...

    It seems that there's no resellers for Veto Pro Pac here in Sweden. Too bad.
  3. Replies
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    1,139

    Come to the cold north Sweden and work please...

    Come to the cold north Sweden and work please Miss Kate :) HVACR in Sweden is a real sausage party :(
  4. Replies
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    1,129

    I like to make people satisfied. But it's not...

    I like to make people satisfied. But it's not always that way. It may occur misunderstandings from customer, so the service leader have to nag a little on me, but i explain my version, everything's...
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    Yeap. Static pressure, but it's no danger if you...

    Yeap. Static pressure, but it's no danger if you are 'bout 4-5 psi less or more than recommended pressure. It will run perfect anyway.
  6. Max working pressure on exchanger 450 PSI, Relief...

    Max working pressure on exchanger 450 PSI, Relief blows by 400 PSI, High pressure switch trips by 350 PSI, Exchanger placed between solenoid valve and TXV, Regular working pressure at 230-240 PSI
  7. Replies
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    Went out for same problem, TWICE, but both Exch....

    Went out for same problem, TWICE, but both Exch. was on freezers.

    Directly when I saw your pics on frosted pipes I direcktly started to think 'bout writing "check suction line temp before and...
  8. Why do this happen? (Suction gas heat exchangers)

    To make long story short.

    Changed one. Cutted the old one for inspection., cracked in one end as well, blowed liquid straight into suction pipe. Iced up liquid separator and compressor.
    Why does...
  9. Thread: leak check

    by Putte
    Replies
    38
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    2,481

    For me it sounds like a worn IR sensor or missing...

    For me it sounds like a worn IR sensor or missing sealings on sensors in and out tubings.
  10. Thread: leak check

    by Putte
    Replies
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    2,481

    Back in sweden we had the oppurtunity to borrow a...

    Back in sweden we had the oppurtunity to borrow a pair of leak detectors, a bunch of different brands and trying it out for a shorter period and evaluate'em, anyone who's curios has given possibility...
  11. Replies
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    1,149

    A swede's sitting on a café eating breakfast,...

    A swede's sitting on a café eating breakfast, aside him there's a norweigan chewing bubble gum
    The norweigan asks artless:
    - Do you swedes eat the whole bread?
    The swede stops to eat:
    - Yeah of...
  12. Chillin' with liquid nitrogene eh?:grin2:

    Chillin' with liquid nitrogene eh?:grin2:
  13. I use D-Tech CO2, Those bastards will be really...

    I use D-Tech CO2, Those bastards will be really nervous with a bad sensor and starts to give false alarms all the time so you dont really know if u got a leak or not. I know that for sure :whistle:
    ...
  14. A blaster is an oversized ref system yes. Just to...

    A blaster is an oversized ref system yes. Just to chill prepared food quick as possible, so it's wont be some bacterias at all, the longer it takes for food to cool down the more bacterias' growing....
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    1,952

    I have to make special order for epoxy coated...

    I have to make special order for epoxy coated evaps when ordering Luve or Alfa Laval brand, as standard they come "naked". But electrolux evaps comes coated as standard.
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    1,952

    There's fully possible to get evaporators...

    There's fully possible to get evaporators prepainted with epoxy coating, li'l more expensive... But they last longer and resist vinegar products better than "naked" evaps. But still vinegar is pretty...
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    Any kind of barley will be moldy if getting wet...

    Any kind of barley will be moldy if getting wet and not drying up properly. But it will take longer time in a cooled area.
  18. Looks like you two want to hurl ;) But why? They...

    Looks like you two want to hurl ;) But why? They are a li'l bit tricky to work with, much electronics to struggle with :P
  19. How common is Blast chillers/freezers in the US?

    A thought just hit me late in the evening/night (well 12.30 AM)

    How common is the use of those "Blasters" in the US... Fast chill/freeze of warm food.
    Haven't seen much posts about those units...
  20. Replies
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    1,384

    GWP... All this talk 'bout that. Makes me barf...

    GWP... All this talk 'bout that. Makes me barf...
  21. Replies
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    1,384

    Oh... Crap :grin2: I've been learned that...

    Oh... Crap :grin2:

    I've been learned that critic point for oil is 248F when i educated me for a pair years ago, and that you didn't want discharge temps over 220F, that it could shorten the oil's...
  22. Replies
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    Hohoho, to find out which one is broken there?...

    Hohoho, to find out which one is broken there? Good luck :grin2:
  23. Replies
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    2,936

    There's one Brand we use frequently where i work....

    There's one Brand we use frequently where i work. Carel. Simple to use, but still very intelligent controllers, with support for several evaporators, support for monitoring and managing over TCP/IP...
  24. Replies
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    There's a suggestion to replace 404A with 407F...

    There's a suggestion to replace 404A with 407F here in Europe, due to a lower GWP, 'til 2015 they (Just a bunch of morons deciding that and more like how much a banana should be curved, how...
  25. The Bitzer Subcritic rack with 4 octagons I told...

    The Bitzer Subcritic rack with 4 octagons I told about in a earlier post have separatly oil level regulators called ERM2 http://www.coolmark.nl/img/products/large/erm%20olieniveauregelaar.jpg

    This...
  26. Seems like Bitzer compressors on the advansor...

    Seems like Bitzer compressors on the advansor rack. Very common brand in most applications, at least here in Sweden...

    Bitzer is realiable, the compressors Rolls-Royce. But in other case......
  27. Err... Correction... Working above critical point...

    Err... Correction... Working above critical point at condenser side in transcritic...
  28. Well... How should i explain it... CO2 pump...

    Well... How should i explain it...

    CO2 pump system. Like using a brine. You have a unit charged with R404A (for example) Running like a freezer, cooling down the CO2 to approx -32F so it stays in...
  29. Here in sweden we have used subcritical CO2 for...

    Here in sweden we have used subcritical CO2 for many years. T'was a supermarket built back in 2005, with bitzer semihermetic reprociating compressors, the first system with subcrit DX we ever built....
  30. Replies
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    Eh. Good quest... Decreases overload, but still...

    Eh. Good quest... Decreases overload, but still there's a overload.

    Compare with a cap tube system w/o solenoid valve. Always a overload compressor after def/startup but hey, they're makin' it,...
  31. Replies
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    2,727

    There's no problem to remove the CPR. What you...

    There's no problem to remove the CPR. What you can add instead is a solenoid valve on the liquid line and connect it so it opens when the compressor's starting. Just before the TXV. Electrolux used...
  32. Then we got those NASTY Condenser leaks. Several...

    Then we got those NASTY Condenser leaks.
    Several times I got to a call, found the circuit flashing, and start to search for leaks. I'm using my reliable D-Tek Select. Comes to a condenser that...
  33. Try 507 instead. Systems that got problems...

    Try 507 instead. Systems that got problems running on 404A runs much better on 507. OR... as a seller did when he was working as ref tecnichian, on a ermegency call, when the saftey valve has been...
  34. Thread: r22 conversions

    by Putte
    Replies
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    10,549

    Conversion turned out well. New oil, new...

    Conversion turned out well. New oil, new evaporating pressure valve, new plate exchanger and new AKV (Danfoss electronic expansion valve) maded the system almost better than it did with R22 (yeah ok...
  35. Thread: r22 conversions

    by Putte
    Replies
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    10,549

    Too much effect loss on 407C, much less loss on...

    Too much effect loss on 407C, much less loss on 404A, All effect is needed in this case.
  36. Some freezers needs the fans running during...

    Some freezers needs the fans running during defrost or else they will not defrost properly. Depends on construction, how the coil and heaters is placed.

    I will come back with more info 'bout it.
  37. Thread: r22 conversions

    by Putte
    Replies
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    10,549

    Will retrofit a unserved(?) R22 unit to R404 in...

    Will retrofit a unserved(?) R22 unit to R404 in the end of coming week. The reason: Plate exchanger on cold side have a water leak.

    It is a small unit, but still it got some capacity. Maneurop...
  38. Thread: r22 conversions

    by Putte
    Replies
    98
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    10,549

    Well... Let me put it in this way... A friend...

    Well...

    Let me put it in this way... A friend of mine was called to a boat, where the system (R22) was leaking like a schweizer cheese. Well anyway. System was empty when he came there. Fixed all...
  39. Thread: r22 conversions

    by Putte
    Replies
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    10,549

    Ummm. I would do it the correct way... Oil...

    Ummm. I would do it the correct way... Oil change, seal change, txv change, then put 404A or 507 if low or mid, aircon apps 407C, and a tune-in. Ok some dollar extra now, but it's totally worth it in...
  40. Thread: r22 conversions

    by Putte
    Replies
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    10,549

    Actually.... a 18 year old Mitsubishi Aircond...

    Actually.... a 18 year old Mitsubishi Aircond with scroll comp, that once had running on R22. Fixed minor leaks last summer, t'was 407C in the system, converted some years earlier, only the ref had...
  41. Thread: r22 conversions

    by Putte
    Replies
    98
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    10,549

    Here in sweden the R22 is commonly replaced by...

    Here in sweden the R22 is commonly replaced by 407C or 410A for air cond and chillers, 404A/507 for low and mid temp, sometimes even for low temp chillers (even 134a is used for mid temp on applys...
  42. Replies
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    One of my colleauges was called out to a summer...

    One of my colleauges was called out to a summer café, where a soft ice machine was placed, it sounded terribly bad... While he's measuring the 3-phase cord he noticed that it was one phase short, but...
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    Well... Also do we have to calculate with a li'l...

    Well... Also do we have to calculate with a li'l backbleed from head pressure by reed valves, and also from slightly defective oil separators. There's many reasons that'll give us refrigerant in the...
  44. Thread: 22 to 407a

    by Putte
    Replies
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    2,011

    What kind of application are we talking'bout? A/C...

    What kind of application are we talking'bout? A/C or refrigerators? A/C works well with 407, but for ref's I'd prefer 404 or 507.
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    Seriously. I haven't thinked 'bout different...

    Seriously. I haven't thinked 'bout different types. I'm just ordering from my dealer. ;) Normally, It's "henry" brand for the separators, I think they're the helical type.
  46. Replies
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    In my opinion. Keep on running with 507, it's...

    In my opinion. Keep on running with 507, it's "softer" for the compressor and more efficient to pick upp energy than 404A. Circuits on 404A with heat problems is running "cooler"/better on 507. Why?...
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    Here in Sweden the CFC:s is completley forbidden...

    Here in Sweden the CFC:s is completley forbidden since january 1st 2000 (oh well R12 circuits up to 900g is allowed), HCFC:s has a fill-stop since january 1st 2002, and getting completley forbidden...
  48. Replies
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    682

    Yeap. High pressures it is, but not necessary...

    Yeap. High pressures it is, but not necessary higher pres. than 410A on hot side if you chilling it down below 32degF. Ordinary Seamless copper pipes for ref use., for trans critic which uses higher...
  49. Replies
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    682

    The use of carbondioxide as ref in the us?

    Oh well.

    Got a thougth 'bout that a few days ago while I was filling up a half-empty sub critic carbon dioxide system (most common) for a bigger grocery store. Here in sweden the CO2 systems are...
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    I've been told by my more learned colleauges that...

    I've been told by my more learned colleauges that a system with txv and no reciever is pretty sensitive to charge. If it's not in right temp area. Charge'til it almost no flash. When close in themp...
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