Intelligent controlling and many functions can be choice! Introducesuitable  for  integrated  pressurized  solar  system 1 collector array – 1 storage tank – 1 pump and auxiliary heating Description: The solar circuit pump (R1) is switched on as soon as the switch-on temperature difference (delTon) 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 (delToff), 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 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.Main technical dataAppearance  of  controller:   178mm×120mm×43mm   Power  supply:   AC230V±10%   Power  consumption:   less than  3W   Accuracy  of  temperature  measuring:   ±2oC   Range  of  collector  temperature  measuring:   -10~220oC   Range  of  tank  temperature  measuring:   0~110oC   Suitable  power  of  pump:   3pcs,≤  600W   Inputs:   1  x  Pt1000  sensor  (≤500oC)  for  collector  (silicon  cable≤280oC),  2  x  NTC10K,  B3950  sensor  (≤  135oC)  for  tank,  (PVC  cable  ≤105oC),   Outputs:   1  relays,  for  circulation  pumps  1  relay  for  electrical  heater   Ambient  temperature:   -10~50  oC  Main functionsMain function:1.Main  menu  DT  O  &  DT  F  Temperature  difference  function2.Main  menu-THET  timing  heating3.TEMP  Temperature  main  menu4.EM  Emergency  collector  temperature(emergency  switch-off  temperature  of  collector)5.CMX  Maximum  limited  collector  temperature  (collector  cooling  function)6.CMN  low  temperature  protection  of  collector7.CFR  frost  protection  of  collector  8.SMX  Maximum  temperature  of  tank  9.REC  Tank  re-cooling  function10.Celsius  and  Fahrenheit  temperature  transferring  11.HND  Manual  mode12.PASS  Password  setting13.LOAD  Recovery  to  factory  setting14.Manual  heating15.Temperature  query  function16.Protection  function18.Anti-dry  heating  Protection19.Screen  protection

solar controller SR208C