Procedure To Prime Manifold Changeover System. P29; Procedure When Primary Supply Fails; Procedure To Reinstate Primary Supply; Pressure Regulator Adjustment. P29 - BeaconMedaes MAT-S Installation, Operation And Maintenance Instructions

Medical Gas Supply System
Table 5: Typical pressure settings for NFPA
primary and emergency manifold changeover system,
during normal pipeline system operation.
Nominal System Design
Max. Static Pressure Primary Supply
Min. Dynamic Pressure Primary Supply
Max. Static Pressure Backup Supply
Min. Dynamic Pressure Backup Supply
NOTE - Table 5 shows typical examples. These figures
may differ depending on the hospital's pipeline
management policy.
NOTE - When used as a backup emergency manifold the
line pressure would be set lower than the primary supply
to ensure it does not supply to the line while the primary
supply is functioning within it's design limits. If the
primary supply fails, causing the pipeline pressure to fall
to the backup system set point it will automatically start
feeding gas to the pipeline, and be manually adjusted to
the nominal supply pressure.
CAUTION! It would be recommended to set
the backup emergency manifold line pressure at least
0.02 Mpa below the main supply source pressure at full
design flow to ensure the backup emergency manifold
does not supply the pipeline during normal primary
source operation.
CAUTION! The following procedures 4.2 to 4.10
are only typical guides, where there are conflicts with
the hospital's procedure, the hospital's policies will take
precedence.
4.2 Procedure to Prime Manifold
Changeover System.
The following procedure must be carried out once the
commissioning (Section 3) is complete and the system is
ready to be put into use.
4.2.1 Ensure the cylinder valves on both banks are
fully open. Correct as required, see Section 4.10 Cylinder
Operation.
4.2.2 Ensure the connecting distribution pipeline is
ready for use. Slowly open the line valve (Item 8, Figure
1).
NOTE - Sections 4.3 & 4.4 are for when the Manifold
Changeover System is used as a backup emergency
manifold only.
4.3
Supply Fails (For Backup Manifolds
Only).
Pressure (Psi)
55 100 180
The following steps relate to Figures 1 & 2, and detail how
63 117 213
to operate the Medical Supply System in the event of the
main supply system failing to supply to the medical gas
47 83 147
pipeline.
63 117 213
47 83 147
4.3.1
Figure 1) is open. Close the main supply line valve on
the failed primary supply.
4.3.2
open. Correct as required.
The pressure regulator may be set below the nominal
distribution system pressure. This should now be
manually increased to the full distribution pressure by
increasing the 2
the correct pressure is being supplied. See Section 4.5,
Pressure Regulator Adjustment.
4.3.3
operation there is a provision for an alarm output to warn
when the running bank cylinder pressure is typically low.
The manifold contents should then be locally monitored
for cycling the cylinder banks for continuous supply (see
Section 4.6 for bank cylinder cycling procedure).
4.4
supply (For Backup Manifold Only).
The following steps detail how to reinstate the primary
supply once it has returned to normal operation.
4.4.1
4.4.2
4.4.3
3.3 resulting in reducing the line pressure back below
the primary supply set-point.
4.4.4
manifold ready for normal backup running.
4.5
4.5.1
Adjust the 1
1) (See Figure 25). Then turn anti-clockwise until the
intermediate pressure reading is typically set as per
Table 6.
29
Procedure when Primary
Ensure the manifold isolation valve (Item 12,
Ensure all cylinder valves on both banks are fully
stage pressure regulator setting, until
nd
Once the Manifold Changeover System is in
Procedure to Reinstate Primary
Slowly open the primary supply line valve.
Close the backup manifold supply line valve.
Follow the commissioning steps in section 3.1 to
Complete steps in Section 4.2 to prime the
Pressure R egulator A djustment.
1 stage pressure regulator adjustment
st
stage pressure regulator (Item 1, Figure
st
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