Always use a calibrated manometer at the 1/8" NPT pressure tap on the regulator's outlet side while the burners are firing to confirm the 15-30" W

providing 1/4 HP of output at a rated speed of 1075 RPM

This adjustability ensures the system maximizes the use of warm return air from the plenum before energizing the reheat coils

Turning the screw alters the pressure at which the internal diaphragm shifts the air signal between the NC (Normally Closed) and NO (Normally Open) ports relative to the Common port

always verify manifold pressure with a manometer and ensure the thermal switch is reset to prevent nuisance lockouts

Nordyne 634661 Molex Plug 324846-701 Always use a calibrated manometerThe Nordyne 634661 Molex Plug is a critical electrical connector designed for seamless integration within Nordyne, Miller, and Intertherm furnace control circuits. This 9 pin female wire to wire connector facilitates stable power and signal distribution between the furnace control board and the blower motor assembly or integrated harness. Engineered for high temperature resilience in HVAC environments, the 634661 Molex housing ensures secure pin