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Thread: Programming my RO system so that the 1st 10 minutes of output goes to drain?

  1. #1
    Regular Vistor
    Join Date
    Jan 2015
    Location
    Toronto, Ontario CANADA
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    48

    Programming my RO system so that the 1st 10 minutes of output goes to drain?

    I have written the following program in order to have the making of RO completely automatic without the need to intervene.

    My RO system is made by Hydrologic (Evolution RO1000). It is a specialized system which does not have any access to the restrictor (hidden inside very specialized waste connector built in to the system), so bipassing this is impossible. The only way I could be sure that the 1st 10mins of the product produced goes to waste, was to use the following outlets, connections and valves:

    My RO storage tank has a high level and a low level switch.

    The source water is connected to a normally closed valve (valve #1) which turns power on when my low level switch is closed and turns power off when my high level switch is open. This valve #1 is powered by my outlet called ROvalve.

    The product output line is connected to a T splitter first and then to a normally open valve (valve #2) before going to my RO storage tank. This valve #2 is powered by my second outlet called ROdelay. The other end of this T splitter is connected first to a normally closed 3rd valve (valve #3), and then to waste. This valve #3 is also powered by ROdelay outlet.

    My code is written as follows.
    ROvalve outlet:
    Fallback OFF
    If S3ROLo CLOSED Then ON
    If S4ROHi OPEN Then OFF
    Defer 000:10 Then ON
    Defer 000:04 Then OFF
    When On > 240:00 Then OFF <<it never takes more than 3 hours to fill my storage tank>>
    ROdelay outlet:
    Fallback OFF
    If Output ROValve = ON Then ON
    Defer 010:00 Then OFF

    Does ROdelay stay OFF after the first 10 minutes? Will this code work ok? Any suggestions?

    Thanks

  2. #2
    Frequent Contributor zombie's Avatar
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    Dec 2013
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    Denver, CO
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    13,176
    You need a virtual outlet with the same code you used in the ROdelay outlet except you want the defer to be Then ON

    The ROdelay outlet should then be

    Set OFF
    If Output ROvalve = ON Then ON
    If Output VOname = ON Then OFF

    Sent from my SM-G965U using Tapatalk

  3. #3
    Regular Vistor
    Join Date
    Jan 2015
    Location
    Toronto, Ontario CANADA
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    Hi Zombie, thanks for the corrections and your time! Here is my new code:

    ROvalve outlet:

    Fallback OFF
    If S3ROLo CLOSED Then ON
    If S4ROHi OPEN Then OFF
    Defer 000:10 Then ON
    Defer 000:04 Then OFF
    When On > 240:00 Then OFF <<it never takes more than 3 hours to fill my storage tank>>

    VO_RO virtual outlet:


    Fallback OFF
    If Output ROValve = ON Then ON

    Defer 010:00 Then ON

    ROdelay outlet:

    Set OFF
    If Output ROValve = ON Then ON

    If Output VO_RO = ON Then OFF

    Is this code ok now?

  4. #4
    Frequent Contributor zombie's Avatar
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    Yep that will work

    Sent from my SM-G965U using Tapatalk

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