Watts 0276500 Valve R-410A ensuring the HVAC controller interprets

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

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

Can this be used for outside air sensing

Utilizing a York pressure control switch ensures that your HVAC system safety protocols remain intact

The unit is rated for 200 PSI at 400

Watts 0276500 Valve R-410A ensuring the HVAC controller interpretsFor 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