Primos 250 controller is a powerful, microprocessor-controlled control device for controlling solar thermal systems. System configurations with a collector field and a storage tank are possible. The flexibility in programming allows it to be used in various types of systems in which both standard and high-efficiency pumps can be controlled.

• 1 predefined solar scheme (solar scheme can be switched off)
• Multifunctional controller with freely selectable, pre-programmed control functions
• Intelligent speed control of the solar circuit pump via PWM, analog signal or 230V wave package for standard pumps
• Clear operating menus with full text display, graphic symbols and four control buttons
• Data logging and recording function