Solar Controllers provide a vital function in every active solar thermal application. Whether controlling a simple two-sensor domestic hot water system or a multi-functional commercial application, a solar controller will guarantee the balance and overall function of any thermal solar system.
At varying degrees of sophistication and size, VM controllers all offer the most basic function of controlling the hydronic pump:
The collector sensor (C), positioned at the solar collector, picks up the rise in temperature. The return sensor (R) is positioned such that it measures the temperature of the heat transfer liquid returning to the collector. The difference between these two temperatures is referred to as Delta T (∆T). When ∆T is set to recommended setting, the collector temperature (C) must rise at least by ∆T degrees above the return temperature (R) before the pump will operate.
|
