SR868C8
Intelligent Controllers for solar Hot Water
Separated Pressurized Solar System
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Introduction
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.
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 measuring |
±2oC |
±2oC |
| Range of collector |
-10～220oC |
-10～220oC |
Range of tank temperature measuring
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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) |
1 x Pt1000 sensor
(≤500oC) |
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collector (silicon cable≤280oC), |
for collector
(silicon cable≤280oC), |
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3pcs x NTC10K, B3950
sensor |
2 x NTC10K, B3950 sensor |
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(≤135oC) for tank(PVC cable ≤105oC) |
(≤135oC) for tank,(PVC cable ≤105oC) |
| Outputs |
3 relays, for circulation
pumps |
3 relays, for circulation
pumps |
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or 3-way electromagnetic
valve |
or 3-way electromagnetic valve |
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1 relay for electrical heater |
1 relay for electrical
heater |
| Ambient temperature |
-10～50 oC |
-10～50 oC |
| Water proof grade |
IP40 |
IP40 |
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
- (
 ) Manual
() Operating manual
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