this unit is the verified direct replacement for the S1-024-27552-001 relay

Johnson Controls A350EA-4 24Vac

Wide Medium Range: Suitable for natural gas

This versatile interface ensures proper sequencing between the drafting system and the heating appliances

this switch is the standard for restoring safety protocols and preventing dry-fire conditions

Weil McLain 510-811-461 Conversion Kit Refrigerant this unit is the verifiedThe Weil McLain 510 811 461 is a specialized thermocouple to thermopile conversion kit engineered for natural gas applications within EG and PFG series boilers (specifically PFG 6 & 7, Series 3 7). This OEM grade upgrade is essential for technicians dealing with older standing pilot systems that suffer from inconsistent millivolt signals or frequent thermocouple failure. By transitioning to a thermopile based ignition system, the boiler gains a more