Cross-reference your existing part number

Is the pitch adjustable on this 3-blade model

acts as a filter that opposes sudden changes in electrical current

Precise Modulating Control: Orchestrates complex firing rates and blower adjustments for consistent discharge air temperatures

Always verify the part number in the specific Weil McLain boiler manual for your model's series before installation

Reznor 197117 Kit R-410A Cross-reference your existing part numberThe Reznor 197117 Kit is an essential DJ20 high altitude kit engineered for Reznor unit heater models UDAP, UDAS, UDBP, and UDBS (sizes 30 125). High elevation installations over 6,000 feet require a precise adjustment to the air fuel mixture to compensate for decreased atmospheric density and prevent incomplete combustion or safety circuit tripping. This OEM replacement part includes a specialized pressure switch, often identified by a purple label,