1.MCU controller; 2.Control thermal system; 3.control pump and solenoid valve; 4.RS485/232 connector; 5.Customized program.

The controllers are preprogrammed for typical middle-, large-scale solar heating projects.

The controllers are equipped with all necessary function to provide a complete solution to control a solar water heating project. These include temperature differential controls to activate/deactivate solar loop pump to transfer heat to storage tank; electromagnetic valve control to withdraw hot water at preset temperature; an alternative heating energy source controller, which can be an energy source provider of electricity, gas, or other fuel, to regulate a boiler or resistor functioning to heat water in the storage tank if the solar system is unable; frost protection and storage tank level monitoring, recirculation pumps and apparatus, faults localization.

Installation data:

    - power supply 210-250 volts

    - wall mounted

    - display showing the solar system status, system temperatures, time, operation status, and fault location, if a system failure occurs

Inputs:5 sensors

-4 temperature sensors (3 temperature sensors in case of CA2)

 -1 water level sensor

Outputs: 6 relays, controls

-alternative energy source control

-2 Electromagnetic valve(220V/5A & 12V/5A) 

-1 temperature differential pump control(220V/5A)

-1 recirculation pump (specified for CA3

-Temperature differential adjustment 3

Solar Water Heating Controller