SR288 Solar Controllers for Split Pressurized Solar Water Heater

1.1 Overview

• SR288 is used in a split pressurized solar water heater system.

• Network connection function, remote control.

• 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:6

• Max.number of Rotary vane electronic flowmeter (FRT):1

• Max.number of 485 communication interface:1

• Max.number of PWM frequency conversion output:2

1.3 Main functions

• LCD---display

• CLK---time setting

• THET---Timed auxiliary heating

• CIRC---water-side circulating pump three-time temperature/time control function

• LOAD---water tank heating setting

• COL---collector function

• OCEM---heat collector emergency shutdown function

• OCCO---collector cooling

• OCMI---the lowest temperature of the collector

• OCFR---heat collector antifreeze function

• PUMP---Water pump control mode (high efficiency pump speed control)

• COOL---cooling function

• OSTC---water tank cooling

• OHDP---heat transfer

• MAN---manual function

• BLPR---blocking protection

• OTDI---high temperature sterilization function

• OPAR---parallel relay

• OHQM---heat measurement

• FS---Flow monitoring and pump idling protection

• UNIT---Conversion of Celsius and Fahrenheit

• BEEP---Buzzer fault alarm function

• RET---reset

• PASS---Password setting

• M.H---manual heating

• Networking function

• Holiday function

• Screen Protection

• Trouble Protection

• Trouble Checking

1.4 Delivery scope

2.1 Technical Parameters

2.2 Optional accessories

2.2.1 Grundfos Direct Sensor VFS and FRT  digital flow meter

2.2.2 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

2.2.3 WIFI To 485 Mode

3.1 SR288 Installation Diagram

3.2 SR288 Installation Manual Download:

Operation Manual of the Intelligent Controller SR288