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Medical Gas Supply System
Figure 20 - Right Bank Low, Left Bank Running.
1500
150
44.0
PSI
Alarm Output Conditions
Alarm Description
Normal
Change Cylinders
Change Cylinders Immediately
low line pressure
High line pressure
Standby Running
Standby Low
Reserve Low
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.
1500
150
PSI
4109992459.00
O2
1500
SCFH
51
140
66.0
150
PSI
PSI
110.0
Condition
Off
On
Off
Off
Off
On
Off
Off
O2
1500
SCFH
51
140
44.0
66.0
150
PSI
PSI
110.0
3.4.8
Ensure all cylinders are closed on both banks,
then slowly drain the pressure from the vent valve
(shown in Figure 1, Item 6) until the cylinder contents
pressure is below the bank changeover point (typically
150 psi for 55 psi supply, 300 psi for 100 and 180 psi
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.
55
150
PSI
Alarm Output Conditions
Alarm Description
Normal
Change Cylinders
Change Cylinders Immediately
Low Line Pressure
High Line Pressure
Standby Running
Standby Low
Reserve Low
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). Apply a slow bleed to the
vent valve, as shown in (Item 6, Figure 1). This will apply
a small flow across the 2
5-15 l/min will be adequate.
3.4.12 Adjust the 2
point by turning the adjustment screw (See Section
4.5, Pressure Regulator Adjustment). Then turn anti-
clockwise until the line pressure reading is below the low
line pressure set point. Default set points can be seen in
Table 4.
24
O2
1500
SCFH
51
55
44.0
66.0
150
PSI
PSI
110.0
Condition
Off
On
On
Off
Off
On
On
Off
stage regulator. Typically
nd
stage pressure regulators set
nd
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