TM 9-2320-209-10-1 FRAME 3 1. Pull DAMPER knob (1) out to get more heated air from the heat outlet. 2. Push DAMPER control knob (1) into lower amount of hot air coming from the heat outlet. NOTE Do not operate the heater with the DAMPER knob (1) pushed all the way in. The unit does not work best with knob in this position. GO TO FRAME 4 4-388