The ThermoBloc boiler protection recirculation and distribution unit is used in hydronic heating systems with non-condensing boilers, including solid fuel, biomass, gas LP or oil-fired. It can be installed with steel, cast iron and copper tube style boilers, automatically controlling the return water temperature, protection against corrosion from condensation occurring when a minimum flue gas temperature is not otherwise maintained. The ThermoBloc unit is compact for easy installation, reducing required space and fittings. It combines the functionality of a boiler protection valve with a circulation pump and a unique flapper check valve allowing for thermosyphon flow between the boiler and distribution system during a power outage. The ThermoBloc includes three temperature gauges and is encased in an insulation shell.

Specifications

• Suitable fluids water, up to 50% glycol solutions
• Max working pressure: 150 psi
• Working temp range: 40° - 210°F
• Max pumping capacity: 10 gpm
• Temp gauge scale: 30° - 250°F