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Medical Gas Supply System
NOTE - To reduce potential gas leakage while changing
empty cylinders, ensure all cylinders have been changed
before opening the cylinder valves.
4.6.6
Slowly open the cylinder valves (see Section 4.10
- Cylinder operation) for all the newly replaced cylinders.
The empty cylinder status on the screen and status icon
will automatically return to normal.
4.6.7
Repeat this section each time, the running bank
drops to the changeover pressure, until the main supply
is fully operational.
4.7
Procedure for Manual Cylinder
Bank Changeover.
4.7.1
To manually cycle the cylinder banks, press the
left
or right
bank switch , see Figure 28.
4.7.2
Change empty cylinders as per Section 4.6.
Figure 28 - Manual Cylinder Bank Selection.
Set
Left Bank
Running
NOTE - If the selected cylinder bank is in low
pressure, the selection will not be activated.
Selection is also not activated if the bank is already
selected.
4.8
Procedure for Operation During
Power Failure.
4.8.1
Refer to hospital policy for actions regarding the
medical gas supply during the event of electrical power
failure.
4.8.2
During power failure the electronic controls will
not be in operation, but cylinder banks can changeover
due to the balanced mechanical design.
4.8.3
When the power is lost to the manifold control,
all alarm outputs will be active to bring attention to the
alarm system, and the solenoid valve on the gas control
line will switch to left bank as primary bank by default.
NOTE - If the medical gas alarm system is also inoperable
the manifold should always be monitored locally as
remote status monitoring is lost.
4.8.4
is the primary source, with full supply pressure and flow
continuity. The right bank supply will take over when the
left bank is below 70 psi. Once the primary left bank is
refilled, it will remain as the primary source. Upon power
restoration, the device reverts to left bank of cylinders.
Once a changeover has occurred, and the cylinders have
been replaced, the system automatically resets alarm
conditions, until power is restored.
4.8.5
reaches the changeover pressure open the standby
bank valve, then close the empty bank. Below picture
shows the left bank empty and right bank valve open.
Set
Right Bank
medical gas when manually controlling cylinder bank
Running
changeover from the isolation valves shown, NEVER
have both valves closed at the same time. Always open
the next running bank first, before closing the empty
bank ready for changing cylinders.
4.8.6
pressure reservation before the left bank cylinder is
replaced to ensure the flow continuity.
4.8.7
determine the cylinder pressure status.
Figure 29 - Cylinder Pressure Gauges.
33
In the event of power failure, the left bank supply
When the running bank cylinder pressure
Intermediate
Isolation Valve
CAUTION! To ensure continuous supply of the
The right bank cylinders should have enough
Monitor the bank gauges shown in Figure 29 to
1
Item
Description
1
Left Cylinder Pressure Gauge
2
Right Cylinder Pressure Gauge
2
4109992459.00
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