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Medical Gas Supply System
Figure 20 - Right Bank Low, Left Bank Running.
Alarm Output Conditions
Alarm Description
Normal
Change Cylinders
Change Cylinders Immediately
low line pressure
High line pressure
3.4.7
Press [Right Arrow] to check the low bank lock
out safety feature. The running bank will not change to
the empty side while the bank is showing low cylinder
pressure, as shown in figure 21.
Figure 21 - Change Bank Lock Out at Low Cylinder
Bank.
4109992485.00
8
Condition
Off
On
Off
Off
Off
8
20
3.4.8
Ensure all cylinders are closed on both banks,
then slowly drain the pressure from the test point
(shown in figure 1, item 17) until the cylinder contents
pressure is below the bank changeover point (typically
10 bar for 4 bar supply, 20 bar for 8 and 11 bar supply).
Stop draining the pressure once the running bank has
changed to the other side.
3.4.9
The controller screen output alarm conditions
will change as shown in figure 22.
Figure 22 - Both Banks Low.
Alarm Output Conditions
Alarm Description
Normal
Change Cylinders
Change Cylinders Immediately
low line pressure
High line pressure
3.4.10 Open 1 cylinder valve on each bank of the
manifold. The controller screen output alarm conditions
will change typically as shown in figure 19.
3.4.11 With the left bank selected as duty (Press [Left
Arrow] to select if necessary). Ensure the test point
isolation valve is open (see figure 23). Apply a slow bleed
to the test point, as shown in figure 23. This will apply a
small flow across the 2
l/min will be adequate.
Condition
Off
On
On
Off
Off
stage regulator. Typically 5-15
nd
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