Danfoss 193B-1702 Thermostat

The Danfoss 0193B1702 thermostat is a precision-engineered thermal component designed for integration within ESBE VTC511 series load valves. Operating with a fixed opening temperature of 122°F (50°C), this replacement thermostatic element is critical for maintaining high return water temperatures in solid fuel boiler applications. By ensuring the boiler reaches its optimal operating temperature quickly, it effectively prevents condensation and localized cooling of the heat exchanger, which are the primary causes of creosote buildup and sulfur corrosion. This HVAC replacement part is essential for optimizing combustion efficiency and extending the service life of large-scale biomass or wood-fired hydronic systems.

When performing maintenance on VTC511 1-1/4 thermostatic valves, replacing the thermal actuator ensures accurate flow diversion to the tank or system loop. This specific Danfoss thermostat element is calibrated for high-flow-rate reliability and is compatible with varied piping configurations in hydronic heating systems. Its rugged construction prevents thermal bypass leakage, ensuring that the boiler protection valve functions according to its specified 122F setpoint under high-pressure conditions.

• System Longevity: Prevents low-temperature corrosion in wood and pellet boilers by maintaining return water temperature above the dew point.
• Direct Compatibility: Engineered specifically for ESBE VTC511 valves, ensuring a drop-in fit without hardware modifications.
• High Thermal Sensitivity: Features a rapid-response wax element for precise thermal regulating valve performance.
• Operational Efficiency: Reduces 122F degree cycling, allowing the boiler to achieve a clean-burn state faster.

Common Technical Questions

What is the primary function of the 50C/122F setpoint in a hydronic loop?
The 122F setpoint is designed to protect the boiler block from thermal shock. It keeps the return water hot enough to avoid moisture condensation on the internal fire-side surfaces.

Can this element be swapped with a higher temperature version?
Yes, the Danfoss 193B-1702 can typically be interchanged with other VTC511 elements if your system delta-T requirements change, provided the valve body is rated for the flow.

How do I know if the thermostat element has failed?
Failure is usually indicated by the boiler taking an excessive amount of time to reach operating temperature or the system loop drawing heat before the boiler is fully up to 122F.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.