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This is a genuine Heil Quaker replacement part engineered as a fixed-temperature bi-metal switch
Industrial-Grade Reliability: Built for continuous operation within Barber Colman or Schneider Electric control loops
Most technicians will require a standard socket set
Cross-reference your unit's data plate with the 330687-704 part number in the manufacturer's parts list to ensure the burner porting and length match your specific BTU rating
Technicians can rely on its sensitive diaphragm and snap-action switch for consistent repeatability in critical HVACR applications
Trane ACT0509 Actuator 320819-301 This is a genuine HeilThe Trane ACT0509 is a heavy duty 24V NSR actuator designed for precise damper and valve control in Trane HVAC systems. Engineered for non spring return operation, this direct coupled actuator provides reliable torque output to maintain accurate airflow positioning within commercial air handling units and VAV boxes. The unit features built in conduit connections, ensuring a secure and NEC compliant electrical installation in high vibration
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