TM 5-4210-221-14/1
ADJUST ANTI-BACKDRAFT VALVE TO CONTROL RATE OF
VALVE ACTION WHICH REGULATES THE SHELTER INTERNAL
PRESSURE. TURN CONTROL KNOB CLOCKWISE TO DECREASE
ACTION OF VALVE AND COUNTERCLOCKWISE TO INCREASE
ACTION OF VALVE.
TS 013692
Figure 2-10. Operation of Air Lock Door Handles and Anti-Back Draft Valve (Sheet 2 of 2)(TS 013692)