The Hot Commissioning for Test Series 2 was carried out between June and September, 1982 at the Grimethorpe Experimental Pressurized Fluidized Bed Combustion Facility. The tests formed the initial part of the second stage of the combustion research phase and provided the first operating experience with the new tube bank, Tube Bank 'C'. The commissioning period consisted of 460 coal burning hours, which included approximately 150 experimental hours. The report provides a description of the Facility as it was modified following the completion of Test Series 1. The test plan and objectives for the Hot Commissioning Tests are detailed. The performance data are tabulated and the data evaluation and analysis procedures are described. The results indicate a significant performance improvement over Test Series 1 and that the plant is well prepared for collecting good quality data during Test Series 2.