Reznor 89661 Timer Refrigerant This orifice is specifically calibrated

This orifice is specifically calibrated for Liquid Propane (LP) gas applications and should not be used for Natural Gas systems due to the specific flow requirements of higher-density propane

Can I use a switch with a different water column (WC) rating

This OEM York furnace part is essential for maintaining design-specified CFM and system efficiency in high-duty cycle environments

Attempting to wire this for single-phase or lower voltage will result in a significant drop in kW output and potential damage to the element or the HVAC repair integrity

and industrial equipment

Reznor 89661 Timer Refrigerant This orifice is specifically calibratedThe Reznor 89661 Timer is a critical engineering component designed for high performance HVACR control, specifically serving as a freeze stat bypass time delay relay. Engineered for heavy duty unit heaters and rooftop units, this genuine Reznor OEM replacement part ensures system stability by temporarily overriding the freezestat during initial cold weather startup. By managing the FRZSTAT bypass interval, it prevents nuisance shutdowns and short