TM 9-4120-385-14
2-4. OPERATING PROCEDURES
a. Control Indicators
(1) DISCHARGE AIR OUTLET LOUVERS. Individually adjust.
(2) FRESH AIR DAMPER CONTROL. Release pullchain to open; secure to close.
(3) RETURN AIR INTAKE GRILLE. Move up to open.
(5) MODE SELECTOR.
(6) TEMPERATURE CONTROL KNOB.