TM 5-4220-233-14WARNINGNever exceed a charging rate of 200 psi/min with SCUBA cylinders out of afilling trough or 400 psi/min with cylinders In a filling trough. Failure tofollow this warning may result in personnel injury, death or damage toequipment.CAUTIONWhen charging SCUBA cylinders with rated working pressures of less than3000 psi special attention should be paid so as to avoid over pressurizingthe SCUBA cylinders. The relief valve is set for cylinders with workingpressures of 3000 psi.(9) Open servicing valve (8) and appropriate fill station valve(s) (9).(10) While monitoring servicing pressure gauge (10), adjust pressure regulator (11) until a safecharging rate is achieved.(11) Continue adjusting pressure regulator(11) as necessary to maintain a safe charging rate untildesired SCUBA cylinder pressure has been reached or reading of servicing pressure gauge (10) andcylinder gauge (12) are equal + or - 100 psi.(12) Slowly close manifold valve (7).(13) Close 1/4-tum ball valve (6) for cylinder just used for charging and slowly open 1/4-turn ball valvefor cylinder with the next lowest pressure reading.(14) Slowly open manifold valve (7).(15) Repeat steps 10 through 14 as necessary until reading of outlet pressure gauge is equal to safe SCUBA cylinder charging pressure as determined in Navy diving manual 0927-LP-0019010.(16) Close servicing valve (8) and fill station valves (9) opened for charging.(17) Close ON/OFF valves (5) on charged SCUBA cylinders(1).(18) Back off on bleed screw (3) of each yoke adaptor (13) to vent pressure from fill hose(s).(19) Tighten bleed screw (3) when air can no longer be heard venting from hose(s), then disconnect yoke adaptor(s) (13) from SCUBA cylinder(s) (1).NOTEIf more SCUBA cylinders are to be charged repeat steps 1 through 19. If chargingoperations are complete proceed to paragraph c.2-29
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