SH08 Differential Temp and Variable Speed Solar Control

The SH08 Solar Control turns on a pump when The S1 sensor is greater than the S2 sensor by a selectable amount. When this difference is minor, the pump runs at a low speed The pump speed is increased when the difference between S1 and S2 is greater. The SH08 also has functions for heat dumping to prevent summer-time overheating and for a high temperature override to prevent winter time overheating. Includes (4) P-01 sensors.