whereas the VU53 series is normally closed

The board is compatible with both 2-wire and 3-wire motorized zone dampers

or side-mounted positions

Set your multimeter to DC microamps (µA) and wire it in series with the sensor lead

detaching the old motor

Lau 60556301 Fan Blade R-407A whereas the VU53 series isThe Lau 60556301 Fan Blade is a professional grade HVAC replacement fan blade engineered for high demand condenser style applications. This 18 inch diameter propeller features a 30 degree pitch and 3 blade configuration, optimized to move significant air volumes while maintaining structural integrity in outdoor environments. Constructed from high strength aluminum with a corrosion resistant steel spider, this CW rotation fan blade is designed for