Reznor 123665 Burner 321142-301 as the citrus-based formula is

as the citrus-based formula is non-corrosive and non-scratching

is a high-capacity thermal expansion valve (TXV) designed for precise refrigerant metering in large-scale commercial AC and refrigeration systems

preventing automatic restarts after a safety trip until a technician inspects the system

you know that maintaining precise combustion airflow is critical for the Ultra 155 gas boiler to operate at peak efficiency and avoid lockout codes

the internal spring return pushes the stem up to keep the valve in the fully open position

Reznor 123665 Burner 321142-301 as the citrus-based formula isThe Reznor 123665 Burner is a precision engineered replacement component designed for compatibility with specific Reznor gas fired unit heaters and duct furnaces. As a critical part of the combustion assembly, this natural gas burner ensures optimal fuel to air ratios and consistent flame stability across high output heating cycles. Built to OEM specifications, the 123665 provides a direct fit solution for maintaining thermal efficiency in commercial