Tech Sterowniki I-3 Plus Heating Controller with OpenTherm, 3 Mixing Valves & Solar Support

The Tech Sterowniki I-3 Plus (WG.14.0093) is an advanced heating system controller designed for modern hydronic installations. It supports OpenTherm communication and provides independent control of up to three mixing valves, making it ideal for multi-zone heating systems. The controller also integrates solar thermal systems, offering dedicated pump and sensor management for maximum energy efficiency.

Advantages

Full OpenTherm compatibility ensures seamless communication with modern boilers. The large color touchscreen LCD provides intuitive navigation and real-time system overview. Weather-dependent control optimizes heating based on outdoor temperature, reducing energy consumption. The controller supports up to 8 temperature sensors, including outdoor, boiler, DHW, and solar sensors, for precise temperature management. Additional features include anti-legionella function, holiday mode, floor heating protection, and alarm system integration.

Suitable for

• Multi-zone heating systems with up to 3 mixing valves
• Solar thermal system integration
• Residential and commercial hydronic heating installations
• Systems requiring OpenTherm boiler communication

Key specifications

• Control Type: Heating System Controller
• Communication Protocol: OpenTherm (OT)
• Mixing Valve Support: 3 independent mixing valves
• Pump Outputs: Boiler pump, DHW pump, 3 mixing valve pumps, Auxiliary pump
• Solar System Integration: Yes, dedicated solar pump control
• Temperature Sensor Inputs: Boiler, DHW, 3 Mixing Valve, Return, Outdoor, Solar (up to 8 sensors)
• Room Thermostat Compatibility: OpenTherm and traditional room thermostats
• Display Type: Large Color Touchscreen LCD
• Control Modes: Weather-dependent, Weekly Programming, Manual
• Additional Functions: Anti-Legionella, Holiday Mode, Alarm System, Floor Heating Protection
• Internet Module Compatibility: Yes (via optional WiFi RS or Ethernet RS module)
• Software Update: Via USB port
• Power Supply: 230V AC / 50Hz
• Max Power Consumption: 5 W
• Operating Temperature Range: 5°C to 50°C
• Protection Class: IP20
• Housing Material: High-quality plastic
• Mounting Type: Wall-mounted

Recommendations

For full remote control and monitoring, pair this controller with the optional Tech WiFi RS or Ethernet RS module. Ensure professional installation by a qualified heating engineer to comply with local regulations and guarantee optimal performance.