SR981S/SR982S operation manual of solar pump stationPage 22 of 85System 3: 1 tank + T-valve to heat tank in layerDescription:Controller compares the temperature of collector T1 and temperature of tank T2 and T3, ifthe temperature difference between collector and tank is over the preset switch-ontemperature difference (T1 & T2 is corresponding DT1O, T1 & T3 is corresponding DT2O),then pump P1 is switched-on, and simultaneously, T-valve is switched to heat thecorresponding tank part, when the switch-off temperature difference between collector andpart reaches ( T1 & T2 is corresponding DT1F, T1& T3 is corresponding DT2F) or the tanktemperature reaches to its maximum value, then P1,R1 are ceased.Tank priority logic will decide to heat bottom part of tank firstly.Input ports Description Output ports DescriptionT1 Sensor of Collector P1 Pump for solar circuitT2 Sensor on the bottom part of tank H1 Back-up heat resourceT3 Sensor on the top part of tank R1 For T-valve to heat tankdifferent partT6 DHW sensor R3 Pump for DHW circuitT7 Sensor on the return pipeT8 Sensor on the flow pipe( SR981S no)List of available auxiliary functions in this system (functions are selectable)Input ports Description Output ports DescriptionT5 Sensor on the solid fuel boiler R2 Pump for solid fuel boiler(SeeParagraph 8.5.2)Above mentioned auxiliary functions should be activated in menu in advance.
