SR81/SR868 Solar Controllers for Split Pressurized Solar Water Heater

1.1 Overview

• 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.

1.2 Applications capacity

• 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

1.4 Delivery scope

2.1 Technical Parameters

2.2 Optional accessories

Electromagnetic relay : SR802,can control electric heating of ≤4000W.

SR802 Connection Diagram:

3.1 SR81 Installation diagram

3.2 SR81 Installation manual download link:

SR81 Operation Instruction.pdf