Pneumatic Leak Tests Installation Guide
2 - 36 046-006272-00 A7™ Service Manual
2.4.4 AIR Cylinder Leak Test
1. Remove the AIR line pressure hose from the line pressure inlet on the anesthesia system.
2. Mount a full AIR cylinder to the rear panel yoke. If necessary, place a new clean tank washer
between the cylinder and the yoke to minimize any leaks at the yoke connection.
3. Open the AIR cylinder until its pressure gauge indicates cylinder pressure.
4. Close the AIR cylinder.
The AIR cylinder pressure gauge should not drop more than 10% of its initial pressure over 1 minute.
2.4.5 Line Pressure Leak Tests
2.4.5.1 BFCS Test
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. Disconnect the hose #26 from the back pressure regulator and plug the connector on the back
pressure regulator.
4. Turn the unit on and push the BFCS button to deploy the BFCS.
5. Open the O2 and AIR needle valve fully.
6. Pinch the O2 line pressure hose.
7. Remove the O2 line pressure hose 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).
8. Release the O2 line pressure hose.
9. Pinch the AIR line pressure hose.
10. Remove the AIR line pressure hoses from the line source while keeping the hose pinched.
11. 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).
12. Remove the plug from the back pressure regulator and reconnect hose #26.
13. Close the O2 and AIR needle valves.
14. Reconnect the O2 and AIR line pressure hoses and remove the pinch in the hose.
15. Disable the BFCS.
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