Solar Water Heater Controller Sr1068

System description 1 collector array - 1 storage tank - 1 pump and auxiliary heating Description: The solar circuit pump (P1) is switched on as soon as the switch-on temperature difference (Ton) between the collector array (T1) and the storage tank (T2) is reached. If the temperature difference between the collector array (T1) and storage tank (T2) drops below the switch-off temperature difference (Toff), or the temperature of storage tank (T3) reaches the preset maximum storage temperature, then the solar circuit pump ( R1) is switched off. Back-up heating by auxiliary boiler (detailed see paragraph 4.4): Within the preset time section of back-up heating, if the temperature T3 is below the switch-on temperature, then the circulation pump ( H1) of back-up heating is triggered, when T3 is heated to the switch-off temperature, circulation pump H1 of back-up heating is ceased.

Technical  data
Range  of  tank  temperature  measuring 0~110oC
Suitable  power  of  electrical  heater 1,≤  1500W
Inputs 1  x  Pt1000  sensor  (≤500oC)  for  collector  (silicon  cable≤280oC),
2  x  NTC10K,  B3950  sensor  (≤  135oC)  for  tank,  (PVC  cable  ≤105oC), 
Ambient  temperature -10~50  oC
Display Only  suitable  installation  indoors
control  body Water  proof  grade:IP43