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ensuring the inducer fan is pulling the correct inches of water column before allowing the main gas valve to energize
you ensure that airflow modulation remains accurate
also identified as the SA-12S Indicator
often due to a clogged port
Aaon P51480 Motor Sheave Els PW 17895 ensuring the inducer fan isThe Aaon P51480 Motor Sheave is a heavy duty, single groove variable pitch pulley designed for precise airflow adjustment in commercial HVAC systems. Cast from high grade iron for durability, this component features a 5. 95" outside diameter and a 7 8" fixed bore. Engineered for versatility, it supports 4. 6 5. 6 variable pitch for 4L and A section belts, as well as 4. 9 5. 9 variable pitch for 5L and B section belts. This allows technicians to fine
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