SR981S/SR982S operation manual of solar pump stationPage 26 of 85System 7: East/West collector array + 1 tank controlled by pump logicDescription:Controller compares the temperature of east/west collector array T0, T1 and tanktemperature T2, when temperature difference reaches its switch-on value ( DT1O), thenP1 ,P2 is triggered , they keeps running until tank temperature reaches its maximum valueor when temperature difference drops to its switch-off value, then P1, P2 is ceased.Input ports Description Output ports DescriptionT0 Sensor of west collector array P1 Pump 1 for collector arraycircuitT1 Sensor of east collector array P2 Pump 2 for collector arraycircuitT2 Sensor on the bottom part of tankT3 Sensor on the top part of tank H1 Back-up heat resourceT6 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 DescriptionT4 Sensor of thermostat function R1 Selectable:(COOL) tank cooling(AHO) thermostatT5 Sensor on solid fuel boiler R2 Pump for solid fuel boilerAbove mentioned auxiliary functions should be activated in menu in advance.
