TM 5-4220-233-14
b.
Recharging Storage Cylinders
Figure 2-6. Recharging Servicing Unit After Long Term Storage
WARNING
The storage cylinders must be purged of dry nitrogen prior to filling with
breathing air. Failure to follow this warning may result in an unsafe
breathing media.
(1) Remove dust cap from recharge port (1).
(2) Slowly open all eight 1/4-turn ball valves (2).
(3) Open recharge valve (3) to vent dry nitrogen from storage cylinders.
WARNING
The storage cylinders should only be filled with compressed breathing air
per BB-A-1034B, Grade A. Failure to follow this warning may result in
contamination of the Servicing Unit and any SCUBA cylinders filled by the
Servicing Unit.
(4) Using an adaptor, connect fill hose from the appropriate compressed air source to recharge port
(1).
(5) Allow the cylinder to be recharged to approximately 300 psi in accordance with applicable T.M.
(6) Close recharge valve (3).
(7) Bleed pressure from the compressed air source fill hose per applicable T.M ,then disconnect the
hose from the recharge port.
(8) Slowly open recharge valve to vent pressure from storage cylinders.
(9) Reconnect fill hose from the appropriate compressed air source to recharge port (1).
(10) Allow the cylinder to be recharged to approximately 300 psi in accordance with applicable T.M.
(11) When cylinder(s) have been recharged close recharge valve.
(12) Bleed pressure from the compressed air source fill hose,per applicable T.M. then disconnect the
hose from recharge port.
(13) Take an air purity sample If sample is good continue to paragraph 2-7. If sample is bad
Compressed Gas System may be contaminated. Notify unit maintenance.
2-22
