Step 1: Turn off all electrical power and lock out the HVAC unit before servicing.
Step 2: Recover refrigerant safely and remove the old compressor from the system.
Step 3: Mount the new compressor securely on vibration isolators, aligning suction and discharge lines.
Step 4: Braze refrigerant lines using nitrogen purge to prevent oxidation inside tubing.
Step 5: Connect electrical terminals and verify correct phase wiring and grounding.
Step 6: Evacuate system, recharge refrigerant, and test for proper pressure, cooling, and operation.