1. Product Description
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
Timed heat---backup heating
Circle---Hot water circulation
LOAD---Setup Loading tank1
PUMP---Pump control mode
BLPR---Blocking protection function
OTDI---Thermal disinfection function
FS---Flow meter type selection.
UNIT---C-F unit switch
PASS--- password set
2. Technical Parameters
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
SR802 Connection Diagram:
3. Product Installation
3.2 SR81 Installation manual download link: