A5/A3â„¢ Service Manual 046-001141-00 2 - 43
Installation Guide Breathing System Checks
2.5 Breathing System Checks
2.5.1 Waste Gas Scavenger Test (if available)
1. Connect one end of the low pressure waste gas hose to the port on the Waste Gas Scavenger
Assembly. Connect the other end of the hose to the EVAC port.
NOTE: If operating the anesthesia system with other types of waste gas
scavenging, ensure that waste gases are directed from the EVAC port to
that scavenging system.
2. Connect the respiratory gas monitor exhaust output to the Colder fitting port on the Waste Gas
Scavenger Assembly.
3. Ensure that the waste gas scavenger flow adjustment is able to be set between the MIN and
MAX line markings.
2.5.2 Internal Gas Connections Test
1. Close and remove all gas cylinders from the anesthesia system.
2. Connect only the AIR line pressure hose to the anesthesia system from the wall supply. Leave all
other line pressure hoses disconnected.
3. With the A5/A3 powered ON, rotate the AIR flow control knob to ensure a continuous flow
increase throughout its full range.
4. Fully rotate the N2O flow control knob and verify that there is no flow.
5. Fully rotate the O2 flow control knob and verify that there is no flow.
6. Disconnect the AIR line pressure hose from the anesthesia system, and connect the O2 line
pressure hose from the wall supply, rotate the O2 flow control knob to ensure a continuous flow
increase throughout its full range.
7. Fully rotate the N2O flow control knob and verify that there is no flow.
8. Fully rotate the AIR flow control knob and verify that there is no flow.
9. Connect the N2O line pressure hose from the wall supply. With the O2 flow control knob fully
opened, rotate the N2O flow control knob to ensure a continuous flow increase throughout its
full range.
NOTE: Make sure that the flow of N2O is at least 10 L/min.
10. Fully rotate the AIR flow control knob and verify that there is no flow.
11. Close all 3 flow control knobs and reconnect the AIR line pressure hose.
2.5.3 Drive Gas Pressure Loss Alarm, N2O Cutoff Test
1. Set the O2 flow to 2 L/min using the flow control valve.
2. Set the N2O flow to 2 L/min using the flow control valve.
3. Set the AIR flow to 2 L/min using the flow control valve.
4. Interrupt the O2 supply to the anesthesia system.
5. Verify that the flow of N2O and O2 stops within 2 minutes and that the flow of AIR (if available)
continues to flow at 2 L/min.
6. Verify the following alarms are activated:
• O2 Supply Failure appears on the screen
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