24V AC/DC spring-return damper actuator engineered for reliable on/off control in HVAC systems

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

55" WC set point for exact furnace pressure switch compatibility with Armstrong equipment

For proper performance and to utilize the vent limiter

Weil McLain 510-811-461 Conversion Kit Refrigerant 24V AC/DC spring-return damper actuatorThe 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