Flue gas draught regulator, electronic UNISTER DUO 201313

Intelligent solid fuel boiler controller with Unister Duo damper

The Unister Duo electronic draft regulator is a reliable solution for precise temperature control in solid fuel boilers. The device automatically regulates the air supply to the firebox, ensuring optimal combustion and user comfort. It not only controls the temperature but also manages the operation of the circulating pump in the central heating installation and the exhaust fan, which translates into the efficiency and safety of the entire heating system. It is a solid construction, tested by users, offering intuitive operation and reliable performance.

Functionality and user benefits

The Unister Duo damper is more than just a temperature regulator. It is a comprehensive solution that takes care of the efficient and safe operation of the boiler:

• Automatic draft regulation: Precise control of the air supply ensures a stable temperature and optimal fuel combustion.
• Circulating pump control: Automatic switching on and off of the CH pump depending on the boiler temperature saves energy.
• Exhaust fan control: Ensures proper chimney ventilation and safe operation.
• Fire retention function (blow): Maintains embers in the firebox, extending the boiler's operating time on a single fuel load.
• Power failure protection: In the event of a power outage, the flap automatically closes, preventing uncontrolled combustion.
• COMFORT SYSTEM function: Protects the circulating pump against scale build-up, extending its service life.
• Freeze and overheat protection: Protects the installation from damage caused by extreme temperatures.
• Fault signaling: Informs about a damaged temperature sensor or problems with the flap motor.
• Expandability: Compatible with the Control remote control panel, allowing convenient management of the heating system from anywhere in the house.

Construction and application

The Unister Duo damper is designed for mounting on solid fuel boilers (coal, wood, etc.) equipped with a flap regulating the air supply. The device is easy to install and operate, and its compact dimensions allow for discreet mounting. Thanks to the precise control of the combustion process, the damper allows for a significant reduction in harmful substance emissions into the atmosphere and increases the energy efficiency of the entire heating system. It is an ideal solution for both new installations and the modernization of existing solid fuel boilers.

The measured temperature range is from -9 °C to +99 °C. The boiler temperature can be set in the range of +40 °C to +85 °C, with a flap lifting hysteresis of 0 °C to 9 °C. The setting range for the CH pump temperature is from +35 °C to +70 °C, with a CH pump hysteresis of 2 °C. The rated supply voltage is 230 V, 50 Hz, and the maximum power of the CH pump is 100 VA / 230 V.