Need help regarding Beacon Medaes dryer issue.

  • Tuesday, August 02, 2022 1:51 PM
    Message # 12870899

    Hi all,

    I was hoping to reach out to see if some of you had suggestions regarding an ongoing issue.

    Customer has issue with a desiccant dryer for a quad 15HP med air system. (circa 2000) I have tried repeatedly to repair. 

    Problem: One dryer will purge for a while and then stop purging, (seemingly being stuck during a cycle). Only by closing inlet valve on dryer will switching valve start working again (pressure drops to about 60 psi, after which dryer cycles towers).

    I have repeatedly changed switching valve out (2 brand new units and also tried older parts I knew to be working).

    I have replaced check valves and also tested new check valves to make sure they are working properly.

    I have tried a different power cord connected directly to 110V power to take the controls out of the equation. No change.

    I have inspected the towers themselves and found nothing out of the ordinary.

    I have contacted Beacon tech support who spent a lot of time helping me go through this but eventually had no other advice.

    I have contacted manufacturer of switching valve. They could not offer suggestions as to why it does not work.

    I have inspected the aluminum mounting block. Minor corrosion on mounting face was cleaned using Scotch Brite. Some improvement was noted. (Still happens, but less-frequently).

    These dryers are not that complicated and I have never had this kind of an issue with one. Do any of you have any suggestions or have you run across this before???

    Thanks in advance,


    4 files
  • Saturday, September 10, 2022 2:07 AM
    Reply # 12913425 on 12870899


    That's a tough one. If the manufacture of the equipment and valve don't have an answer, that's not a good sign.

    Ideas that are probably not helpful:

    1."Easidew" dewpoint monitor miscommunicating with the Air dryers on when to cycle and purge. Check the alarm set points if they are correct.

    2. Maybe check the voltage on the electrical wiring. I've seen other manufacturer circuit boards produce a lower voltage causing the solenoid valves to stop working. In the early stages, I could get it to work again but then eventually it stopped working altogether as the circuit board failed.

    The fact that you bypassed the controls and used a direct power source would suggest these ideas probably won't work.

    Good luck!

  • Sunday, September 11, 2022 1:05 PM
    Reply # 12914628 on 12870899

    The unit looks old enough and considering how much time you have spent on it. The fact that the manufactures are unable to help you. It may be time for replacement.

    The last time I drove across the state of Texas it took me five days. I finally sold the car and got a new one.

    Last modified: Sunday, September 11, 2022 2:03 PM | Don Holden

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