Watts 0276500 Valve R-410A Maintaining a clean flame sensor

Maintaining a clean flame sensor and ensuring proper cabinet venting can help prolong the service life of the control board

ensuring the HVAC controller interprets the pressure correctly across the full 500 psi span

making it ideal for engine rooms and outdoor installations

holding this button down typically initiates a test cycle to simulate a dry probe condition and verify system trip logic

The unit is rated for 200 PSI at 400

Watts 0276500 Valve R-410A Maintaining a clean flame sensorFor high capacity pressure protection in commercial and industrial hydronic systems, the Watts 0276500 (Series 174A 1 1 2 30) is a heavy duty ASME Section IV safety relief valve designed specifically for hot water heating boilers. This 1 1 2 inch bronze boiler pressure relief valve is factory set at 30 PSI, providing a high steam relief capacity of 2,020,000 BTU hr. Built with a rugged bronze body and a stainless steel spring, the 174A series utilizes