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SR868C8 Solar Controller for Solar Water Heater
  • SR868C8
SR868C8 Solar Controller for Solar Water Heater, suitable for split pressurized system, easy for installation and operation.
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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 (△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 4.3): 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.

 
1.Main menu  DT  O  & DT  F  Temperature  difference function
2.Main menu-THET  timing  heating
3.TEMP Temperature  main  menu
4.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 collector
7.CFR  frost  protection  of  collector
8.SMX  Maximum temperature  of tank
9.REC  Tank  re-cooling function
10.Celsius  and Fahrenheit  temperature  transferring
11.FUN Auxiliary  function
12.DVWG Anti-Legionella  function
13.CIRC Temperature  controlled  hot  water  circulation  pump
14.nMIN Solar circulation  pump  speed  adjusting  (RPM  speed  controlling)(Only  available on SR868C8Q)
15.OHQM Thermal  energy  measuring  (Only  available  on  SR868C8Q)
16.INTV Pump  interval function      (Only  available on  SR868C8Q)
17.BYPR High  temperature  by-pass  function (tank  temperature  automatically  adjusting)
18.  HND  Manual  mode
19.PASS Password  setting
20.LOAD Recovery  to  factory setting
21.ON/OFF  button
22.Holiday  function
23.Manual  heating
24.Temperature query  function
25.Memory  Protection
26.Anti-dry  heating  Protection
27.Screen  protection

 

Specification  SR868C8Q   SR868C8
Appearance  of  controller  120mm×120mm×18mm 120mm×120mm×18mm
Power  supply   AC230V±10%     AC230V±10%  
Power  consumption  < 3W     < 3W
Accuracy  of  temperature measuring ±2°C ±2°C
Range  of  collector temperature  measuring  Mins 10～220°C Mins 10～220°C
Range  of  tank temperature  measuring 0～110°C 0～110°C
Suitable  power  of  pump three  pumps, ≤  600W  three  pumps, ≤  600W 
Suitable  power  of electrical  heater One, power≤  1500W  One, power≤  1500W  
Inputs 2 x Pt1000 sensor (≤500oC) for collector (silicon cable≤280oC),
3 x NTC10K, B3950 sensor (≤ 135oC) for tank, (PVC cable ≤105oC),		 1 x Pt1000 sensor (≤500oC) for collector (silicon cable≤280oC),
2 x NTC10K, B3950 sensor (≤ 135oC) for tank, (PVC cable ≤105oC),
Outputs 3 relays, for circulation pumps or 3-way electromagnetic valve
1 relay for electrical heater		 3 relays, for circulation pumps or 3-way electromagnetic valve
1 relay for electrical heater
Ambient temperature Minus 10～50 °C Minus 10～50 °C
Water proof grade IP40 IP40
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