Stiebel Eltron Solar Heating Controllers
Stiebel Eltron Solar multi-functional temperature differential controller with add-on system functions, the SOM series can be used for a wide variety of applications and has inputs for uo to four PT1000 sensors. Preset factory defaults are defined for control of a standard solar water heating system with a second relay (some models) to divert any surplus heat. The auxiliary relay can be used to maintain the tank temperature, protect the system from overheating, or use another source to heat the storage tank.
These controllers features a large Liquid Crystal Dispaly (LCD) user interface with three function keys. The easy-to-use icons assist to operate and customize a solar heating system