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Stepping up 200v to 230v to run Kreyer thermo fan for cold room

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  • Stepping up 200v to 230v to run Kreyer thermo fan for cold room

    We're wanting to run a Kreyer thermo fan off our glycol system to cool a walk in. The system has the capacity, the only problem is the fan runs on 230v and we're 200v. I spoke with our electrician and he said we could give it a go, but might run into some problems (not a lot of help). I was wondering about using a simple transformer, but I've not got much idea when it comes to electrics, and wondered if this would suffice, especially as it would be running pretty much 24/7. The main impetus for using the kreyer fan is simply cost. It would cost us a few hundred euro's as appose to a few thousand for a conventional walk in. I also toyed with the idea of the coolbot device with AC, but if I can get the Kreyer fan to work I think it would be the best option.

    Any thoughts or advice would be greatly appreciated.

    Thanks,

    Tom

    I should probably also ad that it's 60hz (same) and about 1Kw
    Last edited by THL; 08-17-2013, 09:46 PM.

  • #2
    208-230

    Most modern HVACR motors are rated at 208-230. When you say 200V your service is actually rated at 208. A transformer is not the correct idea.
    Check the rating on the motor. If it does not read 208-230 on the label, ask the MFG.
    Otherwise replace the motor with the correct voltage model, which should be a simple affair.
    Warren Turner
    Industrial Engineering Technician
    HVACR-Electrical Systems Specialist
    Moab Brewery
    The Thought Police are Attempting to Suppress Free Speech and Sugar coat everything. This is both Cowardice and Treason given to their own kind.

    Comment


    • #3
      Correction

      I may have assumed you were in the USA with respect to your power.
      The solution is still the same.
      Install a motor that is rated for your supply voltage.
      The OEM should be able to provide this with no problem and it should be off the shelf stock.
      Ask for a corrected nameplate in addition if possible.


      Sincerely
      Warren Turner
      Industrial Engineering Technician
      HVACR-Electrical Systems Specialist
      Moab Brewery
      The Thought Police are Attempting to Suppress Free Speech and Sugar coat everything. This is both Cowardice and Treason given to their own kind.

      Comment


      • #4
        Thanks for that Starcat.

        We're actually in Japan. I'm not sure how this system works, as it will be run from the glycol, and I assume just the fan to circulate the cold air, but if it is a HVACR motor, you might have solved the problem. It was actually the manufacturer who got me to check if the 230v would run (only model they produce), so I'm wondering if it's maybe not that simple, though I'll double check. Any specific reason the transformer wouldn't be a good idea?

        Comment


        • #5
          Xfmr

          A transformer will work, but typically it may cost 6 or more times what the correct motor would.
          I would not be inclined to locate it in the conditioned space.
          It will be heavy.
          There is lost efficiency and one extra component that can fail in the configuration.
          If this is a typical glycol or DX fancoil unit, getting a motor that is rated to 200V should not be that difficult.
          I would talk to a motor shop if the OEM cannot assist before going the XFMR route.
          IN America you would have a standard motor frame dimension, HP, current, RPM and direction of rotation from the shaft end to consider.
          The build from 230 to 200 is not that different.
          Warren Turner
          Industrial Engineering Technician
          HVACR-Electrical Systems Specialist
          Moab Brewery
          The Thought Police are Attempting to Suppress Free Speech and Sugar coat everything. This is both Cowardice and Treason given to their own kind.

          Comment


          • #6
            My call would be to purchase a motor for 200V, but run the 230 V motor until it dies. You might be surprised how long this takes! Since cooling fans run continuously, the motors will need to be replaced every few years (depending on motor), so always having a spare--especially if it's a single-fan unit--is essential.
            Timm Turrentine

            Brewerywright,
            Terminal Gravity Brewing,
            Enterprise. Oregon.

            Comment


            • #7
              I'm pretty sure it's just for running the fan, so I reckon it would just run slower, but as things stand we're probably just going to install a standard conventional walk in cool room.

              Comment


              • #8
                Hi - can you confirm your exact mains voltage spec, please? Just that the information I have gives Japan as 100V for single-phase and 200v for three-phase.

                Looking on Kreyer's website it seems the fan unit you have is designed for 220-230v single-phase, so without some wiring changes won't run on three-phase anyway.

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