Datex-Ohmeda Aespire 7900, User'S Reference Manual

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Aespire 7900
1-10
1009-0633-000
• Turn off the auxiliary O
2
flowmeter and venturi suction.
• Set the system switch to Standby.
• Open the cylinder.
• Record the cylinder pressure.
• Close the cylinder.
• If the air or oxygen cylinder pressure decreases more than 5000 kPa
(100 psi) in one minute, there is a significant leak.
• For N
2
O cylinders, a pressure decrease of 690 kPa (100 psi) in one
minute represents a significant leak.
To repair a leak:
• Install a new cylinder gasket and tighten the tee handle.
• Do this step again. If the leak continues, do not use the system.
w
CAUTION Do not leave gas cylinder valves open if the pipeline supply is in
use. Cylinder supplies could be depleted, leaving an insufficient
reserve supply in case of pipeline failure.
DIN cylinder
connections
1. Close the cylinder valve on the cylinder to be replaced.
2. Loosen the adapter and remove the cylinder.
3. Remove the cap from the cylinder valve on the new cylinder.
4. Point the cylinder outlet away from all items that can be damaged by a
release of high pressure gas.
5. Quickly open and close the cylinder valve. This removes dirt from the
cylinder outlet.
6. Install the cylinder.
7. Do a high pressure leak test:
• Disconnect pipeline supplies.
• Turn OFF the auxiliary flowmeter and the venturi suction.
• Set the system switch to Standby.
• Open the cylinder.
• Record the cylinder pressure.
• Close the cylinder.