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  1. #14
    Join Date
    Jul 2010
    Posts
    40
    Quote Originally Posted by BKS60 View Post
    you might consider installing a Johnson Controls A350 and a 24v/0-10 actuator on the existing dampers. Strap the sensor that comes with the controller on the liquid line and set the controller to your desired liquid temp.
    I was thinking about how to do something like this, but by using liquid line pressure. I haven't been able to find a device that would output 0-10vdc or 4-20ma based on a pressure range suitable for this application.

    Have you ever done this using a JC A350 and LL Temp? Did it work well? How fast is the response time?

  2. #15
    Join Date
    Dec 2009
    Location
    Southern US
    Posts
    504
    No I have not used an A350 for thit before but if you insulate the sensor good it should work fine. The 350 has some tuning adjustability and you have a TXV application so I would prefer to have as constant a liquid temp as possible.

    I would probably pay the extra for a spring return actuator and leave the Penn control on the fan as well.
    I'm good at making things cold...You can ask my first two wives!

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