Waters ACQUITY UPLC Operator's, Overview And Maintenance Manual page 130

b. Tilt the column compartment cover forward just enough to clear the
valve drip tray.
c. Pull the column compartment cover up and away from the column
manager or auxiliary column manager.
4. Do these things if the column compartment has an active preheater:
a. Remove the active preheater assembly from the retainer.
b. While holding the column, disconnect the column outlet tubing.
126
Latch pins
Latches
Valve drip tray
Column compartment cover
Retainer
Active preheater
assembly