TM 5-4220-231-14&P 2-1   b.  Volume Tank Assembly  (VTA)Control Panel  and Indicators  (Refer to  Figure 2-2). INDEX NAME ID POSITION FUNCTION 1 VOLUME    TANK NORMAUCLOSED ACTIVATES IF  VOLUME RELIEF    VALVE TANK  PRESSURE EXCEEDS 275   PSIG 2 RED   DIVER   AIR ALPV505 OPEN    CCW CONTROLS FLOW   OF SUPPLY BREATHING AIR  TO   RED DIVER 3 GREEN DIVER   AIR ALPV506 OPEN    CCW CONTROLS FLOW   OF SUPPLY BREATHING AIR  TO  GREEN DIVER 4 YELLOW    DIVER ALPV507 OPEN    CCW CONTROLS FLOW   OF AIR  SUPPLY BREATHING AIR  TO YELLOW    DIVER 5 BLEED    VALVE ALPV508 OPEN    CCW ALLOWS    PRESSURE TO   BE BLED   FROM   VOLUME    TANK CONTROLPANEL 6 GAGE ISOLATION ALPV509 OPEN    CCW ACTIVATES LP  SUPPLY AIR DIVER    SUPPLY TO   DIVER   SUPPLY PRESSURE PRESSURE GAGE 7 DIVER    SUPPLY ALPG51    0 0  -  500   PSIG INDICATES LP  AIR  BEING PRESSURE SUPPLIED FROM   THE VOLUME    TANK  TO   DIVERS VOLUME    TANK OPEN    CCW DRAINS    CONDENSATE Lij DRAIN FROM VOLUME    TANK Change 2 2-7