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  1. 10-02-2018, 06:50 PM #1
    hvac17011
    hvac17011 is offline Professional Member
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    Copeland digital scroll controller

    I have a question about how the unloader solenoid is controlled. I am working on a dx dehumidification unit. THE units controller supply a 0-5vdc signal to copeland controller. I know below 1.4vdc compressor is to be off. I saw capacity control signal dropped by it didn't seem to correspond to unloaded. Maybe it's just the time delay built in.
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  2. 10-02-2018, 09:22 PM #2
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    icemeister
    icemeister is offline SDC/Educational Committee*
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    Quote Originally Posted by hvac17011 View Post
    I have a question about how the unloader solenoid is controlled. I am working on a dx dehumidification unit. THE units controller supply a 0-5vdc signal to copeland controller. I know below 1.4vdc compressor is to be off. I saw capacity control signal dropped by it didn't seem to correspond to unloaded. Maybe it's just the time delay built in.
    I hope this helps:

    https://climate.emerson.com/OPI/docu...A15Dae1328.pdf

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  3. 10-04-2018, 07:14 PM #3
    heatingman
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    That link does not seem to work.


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  4. 10-04-2018, 07:20 PM #4
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    icemeister
    icemeister is offline SDC/Educational Committee*
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    Quote Originally Posted by heatingman View Post
    That link does not seem to work.


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    Try this: https://opi.emersonclimate.com/CPID/...AEB/ae1328.pdf

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  5. 10-04-2018, 08:43 PM #5
    heatingman
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    That one works


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