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  1. #1
    Join Date
    Jul 2000
    Location
    Dallas,Texas
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    A crack in the liquid line drier stub.
    Uses 410A.

    A digital imaging press. All digital- no plates.


    A scroll with a frequency inverter to match speed to load.
    The compressor is hidden behind the panel.

    Now this is an evaporator.

  2. #2
    Join Date
    May 2004
    Location
    Caldwell, ID
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    Neato.

    What kind of compressor did they use? Size?

    Clyde

  3. #3
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    Jul 2000
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    Thread Starter
    A scroll.
    Looks like 5 - 7.5 ton.

  4. #4
    Join Date
    Jun 2004
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    What is it actually cooling?

  5. #5
    Join Date
    Jul 2000
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    Dallas,Texas
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    Thread Starter
    The machine cools a closed air loop environment. The top picture is of the printing press. It has all the fancy covers because it is a sealed environment. It cools, humidifies, dehumidifes,heats, has heat reclaim, for a main loop and electric reheat in each of about 6 zones.

    The machine is a hybrid cross between a copy machine and a web press. It is capable of printing 1000 sheets an hour with all sheets different. They were waiting to get it back up for a 130,000 sheet run of individualized advertisement mailings.

    This company has 2 of about 20 in the whole U.S.
    Cutting edge printing.

  6. #6
    Join Date
    Mar 2004
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    72
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    Hmm

    What are the minimun and maximum Hertz settings in the drive? Would seem to me that the minimum would be critical.

  7. #7
    Join Date
    May 2004
    Location
    Caldwell, ID
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    I am curious about the VFD settings as well. Copeland says that aroung 45HZ or so the scroll set unloads. THey have also told me they won't warranty a compressor hooked to a VFD.

    Is it a Copeland, Danfoss, or something else?

    Clyde

  8. #8
    Join Date
    Jul 2000
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    Dallas,Texas
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    Thread Starter
    I do not have that data yet. They are supposed to be sending me some information.

    The comntrols are mostly Danfoss. The compressor is a Copeland.

    As I said before, these are new machines and only around 20 are in the U.S. at this time.

    They are German made.
    Heidelburg printing press and Technotrans cooler.

  9. #9
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
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    Heh, and I thought the Edleman coolers I used to work on for a printing company had a complex control system.

    Then again, the "complexity" was enhanced by the fact that the manual and wiring diagrams were in Dainish....

    You should see the look on the customers face when you tell them thier 2 month old, $4 million, printing press will be down for 24 hours because a $30 part failed in the cooling system....

  10. #10
    Join Date
    Jul 2000
    Location
    Dallas,Texas
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    Thread Starter
    I've seen that look.


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