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Maintaining the high limit temperature switch is vital for preventing heat exchanger fatigue and ensuring the HVAC induction heater or furnace operates within safe thermal parameters
Before tightening the hub set screw
This unit is built for a standard 120V primary input with a transformed 24V secondary output
OEM Thermal Calibration: Factory-set 140°F trip point provides accurate over-temperature protection matched to specific York heat exchanger tolerances
Resideo VR8300A4508 Valve Refrigerant Maintaining the high limit temperatureThe Resideo VR8300A4508 is a professional grade 3 4" 24VAC standing pilot dual automatic combination gas valve engineered for single stage heating systems. This high capacity dual safety shutoff gas valve is rated for 1 2 psi and supports a wide operational range from 30,000 to 290,000 BTUh. Designed with a straight through body pattern and flange, it serves as a robust standing pilot ignition control replacement for legacy units. The integrated
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