Upon arrival to compressor replacement we walked up to the C/U on the roof. <br> Uninstalled C/U compressor and removed from unit. <br> Reinstalled new LG compressor and brazed into place. Nitrogen tested at 400psig, vacuumed system down to 500microns. <br> Added 10 pounds of R410a refrigerant, and cycled the unit in cooling mode to ensure proper function. Took temperature readings and had a 20 degree delta T. System is now operating within range of factory specifications.