TM 9-2320-209-10-1 1. Set Hi-LO switch (1) to LO position. 2. Hold START-OFF-RUN switch (2) in START position until indicator light (3) comes on. Indicator light should come on within two minutes. NOTE START-OFF-RUN switch (2) is spring loaded and must be held in position. 3. As soon as indicator light (3) comes on, quickly move START-OFF-RUN switch (2) to RUN position. NOTE Moving switch (2) lever from START to RUN too slowly will result in a heater shutdown. Warm air should be felt at the heat outlet within three minutes. 4. If heater fails to start within two-minutes, (indicator light (3) remains off), move STAR T-OFF-RUN switch (2) to OFF position. Wait until three minutes before trying again to start. 5. Set HI-LO switch (1) to HI or LO depending on heat needed. NOTE LO position of HI-LO switch (1) is suitable for standby periods when heater will operate for a long period of time. GO TO FRAME 4 4-393