New DTC-D temperature controller for small solar thermal systems operates from the same solar panel that powers circulation pump(s)
Available in November 2010, ARTTEC Solar's new model DTC-D solar differential temperature controller is designed specifically for PV powered collector circulation pumps used in solar heating systems. This digital controller includes an internal battery backup that allows the controller to continue to display current temperatures and record and max/min temperatures in the absence of solar power for several days. The controller's backlight makes it easy to read in dark utility rooms. Features include max temperature shut off, with optional over temperature audible alarm. Freeze alarm with optional freeze pumping for systems that operate from batteries. Resettable max/min display of recent temperature extremes. Front panel controls allow easy changes to settings and manual override of pump to on, off and auto modes.