Manual purging requires user interaction. The user must open and close the purge valve by hand to direct the solvent to waste, through the purge outlet on the purge/sensor unit.
The procedure depends on the reason for purging:
When the pump is operated for the first time or when solvent lines are empty, follow the steps in Purging with First Time Operation or Empty Solvent Lines.
To remove air bubbles, or to change to a different type of solvent, or when using a fresh reservoir of solvent after a longer period without flow, follow the steps in Purging for Removing Air Bubbles or Changing to Different Solvent Type.