Changing Cylinders - AIR SYSTEMS INTERNATIONAL MP-2L Manuel D'utilisation

When the cylinder in use has been depleted to approximately 500psi (35 bar), the low pressure
warning alarm will sound, indicating that the cylinder needs to be replaced.
To change a cylinder while the MULTI-PAK
1. Open the second cylinder and note the gauge pressure to assure that it is full.
2. Close the drained cylinder.
3. Open the bleeder valve (MP-2H & MP-4H) to relieve the pressure. Remove the
CGA-346/347 hand
tight or wrench tight nut.
4. Remove the drained cylinder and install a full cylinder in its place. Reinstall the CGA
connections. Close bleeder valves. The cylinder is now ready for use when the other
cylinder's pressure descends to 500psi.
Note: The system is equipped with check valves that will prevent back flow from the other
cylinder in use.
Make sure all personnel have egressed the hazardous area and have disconnected from the breath-
ing air system.
1. Close cylinder valves.
2. Depressurize manifold pressure by pulling the relief valve ring.
3. Close the regulator by turning the control knob counterclockwise.
4. Disconnect airline hoses and reinstall dust caps.
5. Remove connections from cylinders and reinstall cylinder valve covers (if applicable).
HIGH PRESSURE AIRLINE GENERAL MAINTENANCE & INSPECTION
Monthly:
1. Check regulators, gauges, and valves for external leakage.
2. Inspect cylinder valves for proper closure.
3. Check cylinder pigtails for cleanliness, flexibility, wear, leakage, blisters on the hose,
thread damage, and O-rings on CGA fittings. Replace damaged items immediately.
Annually:
1. Check relief valve's pressure setting.
2. Check regulator function by opening and closing regulator valve knob fully.
Every 4 years:
1. Replace all flexible pigtails--consult factory.
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CHANGING CYLINDERS

TM is still in use:
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