Verify that your valve body is listed as a Parker "Chart 4" or "Coil Reference 4" model

Bleed Resistor Integrated: Prevents sticking relay contacts and arcing by rapidly discharging the 250V start capacitor

The Cleveland Controls DFS-221-156 is a heavy-duty

The board includes a clear interface for 7-pin remote wiring

replacing a restricted valve with this genuine York S1-025-43225-000 ensures the system returns to its original factory-specified operating parameters without the reliability issues associated with universal aftermarket alternatives

Johnson Controls Y64T15-0 Transformer THPU32HP7Y Verify that your valve bodyTransformer, 120 208 240 V Primary, 24 V Secondary, 92 Va with Circuit Breaker, Foot Mounting, Male Fitting with 8 " Leads ( Primary Connections ), Female Fitting with 30" Leads ( Secondary Connection )