Complaint
SR81/SR868 3000W Solar Controllers for Split Pressurized Solar Water Heater
SR81 is an upgraded version of SR868C8.
SR81/SR868 is used in a split pressurized solar water heater system.
Intelligently controlled by the latest high-performance microcontroller from NXP.
All devices use industrial-grade standards to operate in cold, high-temperature, and humid environments, while using a clock chip for precise timing control.
The controller is LCD type, with beautiful appearance, stable and reliable performance, easy to install, as the most ideal accessory product for split pressure solar water heater.
Max.number of collectors:1
Max.number of storage tanks:1
Max.number of relays:4
Max.number of sensors:5
Max.number of visualization application system: 1
DATE---Date setting
Timed heat---backup heating
Circle---Hot water circulation
LOAD---Setup Loading tank1
COL---Collector1
PUMP---Pump control mode
COOL---Cooling function
AUX---Auxiliary function
MAN---Manual mode
BLPR---Blocking protection function
OTDI---Thermal disinfection function
FS---Flow meter type selection.
UNIT---C-F unit switch
RST---factory setting
PASS--- password set
Holiday function
Screen Protection
Trouble Protection
Trouble Checking
| Components | Quantities | Remarks |
| Controller | 1pc | SR81 |
| Operation manual | 1pc | |
| PT1000 sensor | 1pc | ∅ 6*50mm,cable length 1.5mm |
| NTC10K | 2pcs | ∅ 6*50mm,cable length 3m |
| Accessory bag | 1pc | |
| Power cable | 1pc |
| Parameter | Value |
| Size of Keypad | 120mm×120mm×18mm |
| Size of Controller | 1.5KW version:187mm×128mm×46mm 3KW/4KW version:218mm×165mm×55mm |
| Power supply | AC100~240V 50~60Hz |
| Power consumption | < 2.5W |
| Measure accurate | ± 2ºC |
| Measure scope of collector sensor | -10~220ºC |
| Measure scope of tank sensor | 0~110ºC |
| Available power of R1 electrical themal trace | < 5000W |
| Available pump P2 can be controlled | pump power <200W |
| Available electrical heater can be controlled H1 | 1pc(1.5KW version)<1.5KW 1pc(3KW version)<3KW 1pc(4KW version)<4KW |
| T1 | Collector:1*PT1000,≤ 500ºC(Sillicon cable ≤ 280ºC) |
| T2,T3 | NTC10K,B=3950,≤ 135ºC(PVC cabke ≤ 105ºC) |
| T4,T3 | Optional sensor: NTC10K,B=3950,≤ 135ºC(PVC cabke ≤ 105ºC) |
| Amblent temperature | -10~50ºC |
| Water proof grade | IP41 |
2.2.1 Electromagnetic relay : SR802,can control electric heating of ≤4000W.
Contactor unit of high power: SR802
When user selects electrical heater as back-up device, we recommend using SR802 unit connecting controller and electrical heater.
Technical data of SR802 Dimension: 100mmx100mmx65mm.
Power supply: 180V ~ 264V / AC 50 / 60Hz.
Suitable power: ≤ 4000W.
Available ambient temperature: -10 ~ 50oC Water proof grade: IP43.
