Remove and dispose of equipment from York XTI AHU for building(s) A, F, H, and I. Deliver and install one (1) new fan blower assembly with new shaft, bearings, housing, and motor. Any other parts necessary to return the air handler to normal service in each building. Change existing variable frequence drive (VFD) and bypass (3-contactor with fused disconnect) on these fan blowers. Installation work must be scheduled with Plant Ops. Adjust fan belts & align sheaves & any other work required for the new fan wheel assembly & motor to run properly. Start up & test to insure proper functioning. At completion of the work, Contractor will provide a written warranty that the completed project is free from any workmanship or material defects for a period of 1 year starting from the date of the works formal acceptance. The warranty shall state that, in case of any workmanship defects that will occur within the 1 year, the Contractor shall implement the necessary corrective work without charging the government for the costs of materials, labor & equipment use. Equipment: Bldg. A: (Upper) Carrier 39E29S Airfoil Fan Bldg. A: (Lower) Carrier 39E19L Airfoil Fan Bldg. F: XTI-054X078-BAJA046A Bldg. H: XTI-045XO75-BAHA046A Bldg. I: XTI-054X078-FAHA046A