Tel: 86-573-87817725
Fax: 086-573-87816388
Contact: Mr.Ken Shen

intelligent controller for solar water heater

1 collector array –
2 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.

Main technical data
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
-10~220oC -10~220oC
temperature measuring

Range of tank
0~110oC 0~110oC
temperature measuring

Suitable power of pump three pumps,
≤ 600W three pumps,≤ 600W

Suitable power of
power≤ 1500W power≤ 1500W
electrical heater

2pcs x Pt1000 sensor (≤500oC) 1 x Pt1000 sensor (≤500oC)
for collector (silicon cable≤280oC), for collector (silicon cable≤280oC),
3pcs x NTC10K, B3950 sensor 2 x NTC10K, B3950 sensor
(≤ 135oC) for tank, (PVC cable ≤105oC), (≤ 135oC) for tank, (PVC cable ≤105oC),

Outputs 3 relays, for circulation pumps 3 relays, for circulation pumps
or 3-way electromagnetic valve or 3-way electromagnetic valve
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

intelligent controller for solar water heaters
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