Heat-Timer - Model SRC (Vacuum) - Subatmospheric Vacuum Steam Outdoor Reset Heating Control System - Brochure

The SRC Platinum is a vacuum steam outdoor reset control for sub-atmosphere steam systems. The SRC Platinum will start/stop the vacuum pump and boiler, and modulate the steam motorized valve to vary (cycle) the duration of seam flow into a building’s radiation in accordance with changes in outside temperature. The colder it is outside, the more steam that is allowed to enter the buildings radiation.