How do I adjust the pressure once the spring is installed

This OEM replacement part is engineered for a precision fit on the flue duct cover plate

including the 325-5A and 325-5L models

ideal for fans

Bard HVAC 8105-031 Motor 321042-401 How do I adjust theThe Bard HVAC 8105 031 Motor is a direct drive 1 3 HP blower motor engineered for specific Bard wall mount heat pumps and air conditioning units. Operating at 230V and 1085 RPM, this permanent split capacitor (PSC) motor features a 2 speed configuration for precise airflow control. Built with CCW lead end rotation and a 48 frame diameter, it serves as the exact factory replacement for the Bard 8105 031BX. Contractors should note the sleeve bearing