TM 10-6640-215-13 4-50.  REMOVE/INSTALL BURN-OUT FURNACE - continued. INSTALLATION Install Burn-Out Furnace.  See figure 4-49. a. Using bracket as template, scribe and drill holes in new burn-out furnace. b. Install eight screws that secure brackets to furnace. c. Place new furnace with support brackets attached on countertop and attach with eight screws. d. Plug burn-out furnace power cord into wall receptacle. e. Verify proper operation. 4-51.  REMOVE/INSTALL THE EXPLOSION PROOF REFRIGERATOR. This task covers: a.  Removal b.  Installation INITIAL SETUP: Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 2) Materials/Parts Required Lockwashers, (Appendix F) General Safety Instructions WARNING ELECTRICAL SHOCK Before  performing  any  maintenance  actions  on  electrical  equipment,  ensure  all  electrical  power has been turned off.  Death or serious injury may occur from failure to do this. REMOVAL Remove the Explosion Proof Refrigerator.  See figure 4-51. a. At Main Power Panel, place circuit breaker A1CB6 to the OFF position. b. Remove thermostat knob and remove ventilation grill from refrigerator. c. Remove  two  mounting  screws,  flat  washers,  and  lockwashers  from  legs  of  refrigerator.    Move  refrigerator  out from wall far enough to unplug power cord from convenience outlet. 4-135