Pneumatic Leak Tests Periodic Maintenance
3 - 32 046-001141-00 A5/A3™ Service Manual
3.9.4 Line Pressure Leak Tests
1. Remove the O2, AIR and N2O cylinder from the anesthesia system.
2. Connect the O2, AIR and N2O line pressure hoses to the line pressure inlet on the anesthesia
system.
3. Turn the unit on.
4. Disconnect hose #26 from the back pressure valve.
5. Plug the output of the back pressure valve.
6. Open the O2, AIR and N2O needle valve fully.
7. Pinch the O2 and N2O line pressure hoses.
8. Remove the O2 and N2O line pressure hoses from the line source while keeping the hoses
pinched. The pressure measured on the line pressure gauge on the front of the unit should not
fall more than 10 psi per 100 seconds (2 psi per 20 sec).
9. Release the O2 and N2O line pressure hoses.
10. Pinch the AIR line pressure hose.
11. Remove the AIR line pressure hoses from the line source while keeping the hose pinched.
12. The pressure measured on the line pressure gauge on the front of the unit should not fall more
than 10 psi per 100 seconds (2 psi per 20 sec).
13. Remove the plug from the back pressure valve and reconnect hose #26.
14. Close the O2, AIR and N2O needle valves.
15. Reconnect the O2, AIR and N2O line pressure hoses and remove the pinch in the hose.
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