Position-velocity diagrams of the (J,K) = (6, 6), (7, 7). (9, 9), (10, 10), (12, 12), (13, 13), (14, 14) lines as well as the CH₃OH line observed with the JVLA B-array towards NGC 7538 IRS1. The cut is taken at the peak of the NH₃ core with a PA = 40° for the NH₃ (6, 6), (7, 7). (9, 9), and CH₃OH lines, and PA = 35° for the NH₃ (10, 10), (12, 12), (13, 13), and (14, 14) lines. The contours are drawn at steps of −0.008 Jy beam^-1 starting from −0.004 Jy beam^-1. The images were constructed with a 0.′′04 pixel for all transitions. Only the main hyperfine line is shown for each transition. The vertical dashed lines indicate the velocities of −59.3 and 56.4 km s^-1. The PA is measured from north to east.