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Rezensionen (1)
31. Jan 2020
Functions properly, but not a user-friendly installation to replace a wall-mounted unit.
I purchased this differential controller for my 30 year-old solar domestic hot water heating system. I replaced a defective Goldline GL-30 controller.
This new controller has been operational for 3 months now, and is functioning properly.
But I do want to mention a few important points.
This is an odd little unit. It is not a user-friendly replacement for standard wall-mounted solar controllers. It is not UL listed. It is not designed to be easily wall-mountable. You will have find an enclosure to make it wall-mountable and to meet code. Perhaps a plastic enclosure designed for outside receptacles. Or make one out of wood.
I did a jerry-rigged installation by inserting it inside the old GL-30 through a conveniently located removable front panel, after pulling out the old motherboard. Thus I didn't have make a new enclosure or change the external wiring.
The unit comes with a small single sheet (2-sided) of instructions. I had difficulty following them to change the LED temperature readouts from celsius to Fahrenheit, but eventually succeeded.
The default settings for the temperature differential for turning the solar loop circulator on and off are similar to the old controller's, so I didn't have to mess with changing them, but you can modify them if you want.
The LED display will continually display the bottom tank sensor and solar controller temperatures, cycling between them about every 10 seconds. You don't have to press anything to see them.
When the temperature differential is triggered, switching the circulator on, the LED will display the word "working".
If you don't mind the trouble of finding a way to install the unit, it certainly is good value, because standard user-friendly wall-mounted solar controllers seem to cost at least 3 times more.