York 571 03774 272 Wiring Power Supply Refrigerant Dual Layer Detection: Utilizes iO WWPC pressure Dual Layer Detection: Utilizes iO WWPC pressure controls (tripping below 10 PSI) and iO WWR240 voltage monitoring relays to detect both mechanical and electrical tampering Trust this boiler ignition control to maintain peak performance in your heating installations This power supply is primarily utilized in mid to large capacity York commercial rooftop units and specialized split systems requiring stable voltage for control logic communication Industrial Thermal Resistance: Heavy duty insulation protects against wire fatigue and brittle failure in high ambient temperature environments