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Medical Gas Supply System
4.
Principles of Operation.
4.1
General.
The Manifold Changeover System pressure is set typically
as per table 6 depending on whether it's being used as a
primary or backup supply manifold system.
When the Medical Gas Supply System is in operation
there is a provision for an alarm output to warn when
the running bank cylinders are low, or if the line pressure
is outside of normal operation.
See figure 25 for full manifold visual indicators and
meanings.
Screen Conditions
No. Description
Condition
Pressure Value
Line Pressure
1
Value
ERR
Pressure Value
Cylinder
2
Pressure Value
ERR
Normal
Change Cylinder
Immediately
Standby Running
Standby Low
Manifold status
3
graphic
Reserve Low
Low Line Pressure
High Line Pressure
Manifold Fault
On
Left bank
4
running icon
Off
On
Right bank
5
running icon
Off
Off
Left bank
6
empty icon
On
Off
Right bank
7
empty icon
On
NOTE - Low line pressure fault will switch the duty bank
to try and correct the pressure, but the alarm fault will
remain along with a message on the screen to indicate
which bank is faulty. Once the error has been corrected
select the faulty bank as running, if the line pressure
remains normal the pressure fault alarm will return to
normal.
4109992485.00
Figure 25 - Visual Indicators.
13
NOTE - Contents value and graphic for liquid cylinders
Action
will not normally start to drop in pressure until all the
See No. 11 & 12
liquid has been used, so the remaining contents is pure
Sensor fault
gas. However, during high flow rates the gas can be used
faster than the liquid can evaporate, resulting in the
See No. 9 & 10
contents pressure dipping.
Sensor fault
No actions
Change empty
No.
cylinders
See No. 8
8
See No. 9
See No. 10
See No. 11
9
See No. 12
Check sensor or
solenoid status
10
No actions
No actions
No actions
11
No actions
No actions
Change left bank
12
Cylinder
No actions
13
Change right
14
bank Cylinder
Item 10 condition status is shown below, only effective when
ERM connected.
22
2
1
4
6
3
12
11
Description
Standby running icon
Standby low icon
Reserve low icon
Low line pressure icon
High line pressure icon
Left bank duty select
Right bank duty select
Reserve Low
10
8
7
Condition
Action
Off
No Actions
Change empty
On
cylinders
Off
No Actions
Change empty
On
cylinders
Off
No Actions
Change Cylinders
On
on ERM
Off
No Actions
Check regulator
On
setting
Off
No Actions
Check regulator
On
setting
10
9
5
14
Reserve
4 2
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