TM 10-4520-263-12&P               0004 00 SPACE HEATER SMALL (SHS)              CONTROLS, INDICATORS, AND LABELS/INSTRUCTION PLATES 0004 00-1 GENERAL The following illustrations and tables show the location and function of each control and indicator on the SHS and its associated equipment. Table 1 describes the controls and indicators for the SHS. Table 1.  SHS Controls and Indicators KEY ITEM FUNCTION 1 AIR VENT/PRIMER PORT CAP Allows air to enter the fuel tank during operation so that fuel is able to flow freely through the fuel management system. The primer port cap is removable so that fuel can be extracted from the fuel tank for priming.   2 BURNER  RATE  CONTROL Controls fuel flow by moving zero pressure regulator to desired setting. 3 BURN RATE INDICATOR SCALE A scale from 1 to 10 that indicates the relative burn rate of the heater. One is the lowest setting and ten is the highest. 4 FUEL ON/OFF CONTROL A ball valve that has an ON-OFF position. Controls fuel flow from fuel tank to the regulating float valve. 5 LID ASSEMBLY SIGHT GLASS Located on the top of the lid assembly, the sight glass allows viewing of flame in  burner. 6 FUEL CAP Located on the top of the fuel tank, can be removed to gain access to fuel tank for refueling. 7 LID ASSEMBLY LATCHES Two latches located on either side of the lid assembly that secure the lid assembly to the burner canister. 8 PRIMER BULB Slender aluminum tube with rubber squeeze bulb that permits fuel to be extracted from the fuel supply and injected into the burner shell for priming. 9 FUEL QUICK DISCONNECT Fuel quick disconnect fitting that allows an external fuel supply to be connected to the heater. 1 3 4 2 5 6 7 8 9