Quote Originally Posted by RANGER1 View Post
Is it worth finding out price & a few contacts from M&M.
Sounds like a big player in that region of USA.
If you know exactly what you want & approached a PLC controls company, they could make one as simple or as complex as you like.
We always stipulate that we pay them to develop it, so it belongs to us, no secrets, copy of programe etc.
Is there someone like that in your region?
I will get information about M&M.
Actually, I'd like to find simple PLC from the shelf. Usually, it is much cheaper than custom made PLC. It should have two set points of the condensing pressure. One for operation and one for defrosting. Additionally, sequence of the fans and pumps should be chosen. I ask one company in our region but their cheapest PLC is $30,000. We know how to ave energy but we need tools(not expensive) to implement that knowledge.