Step1: Disconnect electrical power and shut off system water supply before beginning installation.
Step2: Drain unit completely and remove access panels to expose existing pump/motor assembly.
Step3: Label and disconnect all electrical connections and inlet/outlet plumbing lines.
Step4: Remove mounting bolts and carefully extract the old assembly.
Step5: Position new pump/motor unit, align ports, and secure with hardware.
Step6: Reconnect plumbing and wiring, restore power, and test for leaks and proper operation.