How do I replace the fuse F1 on the Deltaweld 452?

Turn off power and open the rear access door. Locate the fuse holder cover. Turn and pull out fuse F1 (a .5A 600V time delay fuse), and install the replacement by inserting the flat end of the new fuse into the cover. Fuse F1 protects the control transformer from overload; if it opens, weld output and the fan motor stop. (Page 22)