Quote Originally Posted by Tycho View Post
That seems wildly overpriced, we deliver high end controlpanels for freezing and RSW systems for less than half that price, with integrated condenser pressure regulation through VFD and valve actuators or both, depending on the application.

Be it a fan or a pump you need to regulate, all you need is a VFD, danfoss, ABB or Vacon, doesn't matter.
the VFD can be set to maintain a setpoint through a pressure sensor.
If you require a higher, or different setpoint during defrosting, that is all available through a simple input on the VFD, where you set it to a different speed or a different setpoint.

you don't need expensive PLC solutions, it can all be done in the VFD.
Tycho.
This is really good idea. However, new fan motors and VFD should be bought first. Hopefully, it will work for my customer.