Solar Controller

Solar Controller
Model: SR500

Solar controller main technical data
Model: SR500
1、Dimension: 210 mm x 145mm x 40mm
2、Self power consumption: <3W
3、Measuring accuracy of temperature: ±2℃
4、Temperature range of measurement: 0~99℃
5、Maximum power of controlled pump: ≤600W
6、Power of accompanied electrical heating wire: ≤800W
7、Power of auxiliary electrical booster ≤2000W ( standard collocation),
≤3000W (not standard, selection available )
8、Electromagnetic valve parameter: DC 12V, AC 220V,

valve and un-pressurized valve are available for selection,
※ operation pressure of pressurized valve: 0.02Mpa ~ 0.8Mpa,
suitable for providing water directly
※operation pressure of un-pressurized valve: 0.0Mpa,
connected with water tank or low pressure water providing

Suitable for integrated unpressurized solar system
Controller main functions

1、 Time display
2、 Water temperature display
3、 Water level display
4、 Auto mode
5、 Water level pre-setup
6、 Manual water loading
7、 Temperature controlled water loading
8、 Timing water loading
9、 Water loading when tank is lack of water
10、Compulsive water loading
11、Increasing Water pressure during water is loaded.
12、Manual heating
13、Timing heating
14、Hot water circulation
15、Hot water pipe insulation
16、Low pressure protection
17、Collector tube protection
18、Memory protection when power is failure

Schematic diagram Solar Controller (SR500)


Model: SR609C

Solar Controller main technical data
Model: SR609C
1、Dimension: 170mmX128mmX40mm
2、Self power consumption: <2W
3、Measuring accuracy of temperature: ±2℃
4、Temperature range of measurement: 0~99℃
5、Power of auxiliary electrical booster ≤2000W ( standard


suitable for integrated pressurized solar hot water system
Controller main functions

1、Time display
2、Temperature display
3、Timing heating at three time sections
4、Manual heating
5、Memory protection when power is failure
6、Trouble indication of sensor

Schematic diagram Solar Controller ( SR609C)

Model: SR868C8

Solar Controller main technical data
Model: 868C8/SR868C8Q

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.


Suitable for Split pressurized solar heating systems
Controller main functions

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
Controller main technical data
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
±2oC   ±2oC
Range  of  collector temperature  measuring   -10~220oC   -10~220oC
Range  of  tank temperature 
  0~110oC  0~110oC
Suitable  power  of  pump   three  pumps,≤  600W three  pumps,≤  600W 
Suitable  power  of  
electrical  heater
  power≤  1500W  power≤  1500W
Inputs 2pcs  x  Pt1000  sensor  (≤500oC) 
for collector 
 (silicon  cable≤280oC),
3pcs  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  -10~50  oC  -10~50  oC  
Water  proof  grade    IP40      IP40  

Schematic diagram Solar Controller ( SR868C8)