Royse Space-Saver circulation units: need some refrig help...

Discussion in 'Komori Printing Presses' started by JoJo, May 12, 2010.

  1. JoJo

    JoJo Member

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    These 6 chillers attached to a Komori L-632 are not all functioning properly. Some get darn cool (frosting) and others tepid.

    Most (4) are R-12 FREON and 2 are R-134a. The R-12 units have only a low-side port, while the R-134a units have both low and high ports. I think they're all 1 (one) lb. charge units.

    I've checked refrigerant pressures on them and the vary all over the place (10-25).

    I need some idea of what to expect re. pressures. I've got gauges and cans of refrigerant, I just need some idea of what pressure to shoot for and if this pressure is measured with water in the tank or "naked", running press (generating heat) or not.

    Ambient temps here in N. California now are ~72F (24C).

    Thanks,
    JJ
     
  2. 5150pressman

    5150pressman Senior Member

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    Are the thermostat set right on them?
    I know if you set them too low it'll frost up.
     
  3. JoJo

    JoJo Member

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    Too cold is not the problem. Not cold enough is.

    I need to know what pressures to expect for the R12 and R134 units.

    Thanks.
     
  4. 5150pressman

    5150pressman Senior Member

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    Forget about the compressor pressure for a minute.
    Does the unit have a temp reading in the front? LCD/LED?
     
  5. JoJo

    JoJo Member

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    No temperature read-out. It has a mechanical thermostat on the rear near the top: crank the knob and the set temperature indicator goes up and down.

    I learned that these are Royse model SS-5.

    Thanks.
     
  6. KGM

    KGM Senior Member

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    The frosting i find i get when the temperature is too low. faulty thermostat could be the problem. I normally use a refrigeration engineer, should be able to find the fault pretty quick
     
  7. JoJo

    JoJo Member

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    My problem isn't frosting. My problem is that some of these units don't even get cool at all. Tepid. Lukewarm.

    I'm not worried about the ones that frost. The thermostats might be misadjusted. I'm not going to worry about them until the all cool.

    What pressures should I see on the R12 and R134a units?
     
  8. 5150pressman

    5150pressman Senior Member

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    Try this.
    On the units that doesn't get cold. Turn the temp down to say 40 degrees. The compressors should kick on. You can hear it come on.
    If it doesn't come on. It might be the temp controller box. If its a box made by Ranco I can tell you how to check to get it to work.
     
  9. JoJo

    JoJo Member

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    Turning on power to the Royse unit, the compressor comes on immediately. It doesn't get cold.

    This means a) not enough gas, b) bad compressor, c) foreign stuff (air? water?) in the gas circuit, or d)?
     
  10. 5150pressman

    5150pressman Senior Member

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    d)....sorry I can't help you.

    : )
     
  11. rolandman

    rolandman Senior Member

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    We Used to get this quite often when we had royce;s, we just used to get a fridge engineer to come out every now and again and fill it with gas.
     
  12. eagleI

    eagleI Member

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    D = loss of vaccum pressure/no freon....fix leak...recharge unit.
     

  13. tonythetiger

    tonythetiger Previous User

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    If it doesn't cool it's because of a lack of refrigerant gas in the system.Get it re-gassed by a refrigeration engineer,Job done,Simple!!!!