TM 9-2320-387-10
NOTE
Perform step b for M1113 models only.
b. Push fresh air intake lever (3) forward to close grille.
c. Turn heater fan switch (4) to desired setting, HIGH/LOW.
NOTE
For maximum heat, pull heater control knob all the way out.
d. Position heater control knob (2) to desired setting.
e. To shut off outside air, pull out control knob (1).
Change 3
