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Thread: Apex Solenoid

  1. #1
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    Apex Solenoid

    I am trying to use the Apex solenoid to fill up my atomatic top off reservoir. I would like to program the solenoid to be open for X amount of time and then turn off. To kick off the refill (open solenoid), I will have an Apex optical sensor at the bottom of the ATO reservor and once the water level goes below the sensor, it will open up the solenoid to start refilling for X amount of time. Obviously, I will need to know how long to leave the solenoid open to fill up my reservior and then turn off. As a backup, I will have a float valve on the top of the ATO reservior to manually shut off the flow from the RODI.

    My main question is will this work? Also, can I program the solenoid to only be open for X amount of time?

  2. #2
    Frequent Contributor zombie's Avatar
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    An easier way is to have it run between the float and the optical and latch off if it runs for longer than it should. The basic layout would be like this for that method.

    Fallback OFF
    If LowSw OPEN Then ON
    If Float OPEN Then OFF
    When On > XXX:XX Then OFF

    You might be an engineer if...You have no life and can prove it mathematically.

  3. #3
    Frequent Visitor rkpetersen's Avatar
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    zombie, from his description, he doesn't plan on having a sensor on the float valve, it's just there to shut off the supply if it gets too full. If this is the case, with only one sensor, you could do something like:

    Fallback OFF
    Set OFF
    If LowSw OPEN Then ON
    Defer 005:00 Then OFF

    would keep the solenoid open for 5 minutes plus a few seconds.

  4. #4
    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by rkpetersen View Post
    zombie, from his description, he doesn't plan on having a sensor on the float valve, it's just there to shut off the supply if it gets too full. If this is the case, with only one sensor, you could do something like:

    Fallback OFF
    Set OFF
    If LowSw OPEN Then ON
    Defer 005:00 Then OFF

    would keep the solenoid open for 5 minutes plus a few seconds.
    Correct. I misread FLOAT VALVE as reading FLOAT SWITCH.

    You might be an engineer if...You have no life and can prove it mathematically.

  5. #5
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    Thanks! That answers my question perfectly.

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