Check out this controller from Com-Trol. I have worked in the supermarket field of HVAC/R for sometime and we use this extensively. It can also control your lighting, alarms and monitoring runtimes, maintainence, ect.
http://www.ies.invensys.com/pdf/MCS-4000.pdf
I have used it for years with...
Does anyone have a program that will calculate commercial rack refrigeration defrost times that will keep a somewhat constant load on the racks given the systems BTU's and defrost times? Thanks.
