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Thread: programming - chiller, heater and an Aqualogic TR115DN 2 stage controller -

  1. #1
    Frequent Visitor debbygoldman's Avatar
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    programming - chiller, heater and an Aqualogic TR115DN 2 stage controller -

    Folks:

    I have (like many here) a heater and a chiller. I purchased a 2 stage controller as I was told that it's a better way to control a chiller, and that the apex can be used for fail safe. Let me know if I've got it right please.

    The Controller Setpoint 1 is set at 79 with a 2 degree differential. Setpoint1 = Stage1 = heat!
    The Controller Setpoint 2 is set at 79 with a 2 degree differential. Setpoint2 = Stage2 = chiller!

    The physical outlet Control-3_4 has the following program

    Set ON
    If Temp < 74.5 Then OFF
    If Temp > 85.5 Then OFF
    If Temp > 75.0 Then ON
    If Temp < 85.0 Then ON

    My hope is that the Controller outlet stays on unless the temperature falls below 74.5 or rises above 85 - thus turning off the outlet and effectively terminating the power to the controller. Otherwise, the temp should stay between 77 & 81??

    Am I smoking something or do I have it??

    Thank you all!

  2. #2
    Frequent Contributor zombie's Avatar
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    You are wasting the stages by setting both to the same temp. Stage 2 should be set the next highest value it lets you.

    Your code is not correct and your desired bounds are too wide to actually protect your inhabitants. The maximum you should use is 2 degrees below the chiller off point. What you want is this. The upper limit is not helpful unless it also heats.

    Fallback OFF
    Set ON
    If Temp < 77.0 Then OFF
    Min Time 060:00 Then OFF

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

  3. #3
    Frequent Visitor debbygoldman's Avatar
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    what about the 2 stage controller

    Aqualogic chill mode
    setpoint 1 = 79
    differential 2

    heating mode
    setpoint 2 = 77
    diff 2

    Do you recommend setting the Aqualogic as the main-controller and the apex as backup or visa versa

    Can you kindly help?
















    Quote Originally Posted by zombie View Post
    You are wasting the stages by setting both to the same temp. Stage 2 should be set the next highest value it lets you.

    Your code is not correct and your desired bounds are too wide to actually protect your inhabitants. The maximum you should use is 2 degrees below the chiller off point. What you want is this. The upper limit is not helpful unless it also heats.

    Fallback OFF
    Set ON
    If Temp < 77.0 Then OFF
    Min Time 060:00 Then OFF

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

  4. #4
    Frequent Contributor zombie's Avatar
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    Quote Originally Posted by debbygoldman View Post
    Aqualogic chill mode
    setpoint 1 = 79
    differential 2

    heating mode
    setpoint 2 = 77
    diff 2

    Do you recommend setting the Aqualogic as the main-controller and the apex as backup or visa versa

    Can you kindly help?
    Since your aqua logic both heats and cools, you want a code like this

    Fallback ON
    Set ON
    If Temp < 76.0 Then OFF
    If Temp > 80.0 Then OFF
    Min Time 030:00 Then OFF


    Make sure to email yourself for these temps so you can manually turn it on and observe if necessary.

    Sent from my SM-G965U using Tapatalk

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