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Medical Gas Supply System
6.3
Preparation for Component
Replacement and Maintenance
Requiring Single Cylinder Bank
Isolation.
NOTE - If the service being carried out will require purging
the manifold before bringing back online it would be
recommended to fully isolate manifold as in section 6.2.
6.3.1
Ensure there is adequate gas remaining in
the cylinder bank that will be running during the
maintenance procedure. Also ensure alternative gas
supply is available and functioning incase maintenance
period runs on longer than expected, before taking the
Manifold Changeover System bank offline.
6.3.2
Remove the front cover by opening the latches
as shown in figure 36, and lift away.
6.3.3
Close the isolation valves as shown in figure 38
and figure 39 for the relevant side to be serviced and
close all the cylinder valves on the same bank.
Figure 38 - Isolating the Left 1
Left bank
Left
Bank
Closed
Figure 39 - Isolating the Left 2
Line Isolation
Valve
Left
2
Stage
nd
Regulator
Isolated
Intermediate
Isolation Valve
4109992485.00
Stage Regulator.
st
Stage Regulator.
nd
6.4
1
Stage Pressure Regulator
st
Maintenance.
WARNING! Vent all inlet pressure and outlet
pressure to 0 bar prior to servicing the regulator.
WARNING! Service must be performed in a clean
environment, free of any oils and grease (hydrocarbons).
- Gloves must be worn to preserve cleanliness of internal
regulator components.
- Use care to not damage the regulator's sealing surfaces.
Scratches or other damage to certain surfaces may
render regulator non-repairable.
NOTE - 1
stage regulator maintenance can be
st
performed with the associated bank isolated, while
running on the opposite bank of the manifold.
Following procedure describes process to service 1
stage pressure regulator. If necessary, regulator service
can be performed while manifold is in service. However,
this should only be done by qualified technicians experi-
enced in servicing medical equipment. Internal repair of
regulator is not recommended.
6.4.1
If the optional service mode is selected during
maintenance, complete steps in 6.1.
6.4.2
Complete the steps in 6.3 to perform this
maintenance with one bank running. If total isolation is
preferred, follow steps in 6.2.
NOTE - Figure 40 shows example of left 1
maintenance, mirror to opposite side for working on the
right bank.
6.4.3
Close all cylinders on side of manifold where 1
stage pressure regulator will be repaired.
6.4.4
Rotate the ball valve handle on the same side
after the 1
stage pressure regulator to isolate the 1
st
stage pressure regulator.
Figure 40 - Isolating the Left 1
Intermediate
Isolation Valve
34
stage regulator
st
Stage Regulator.
st
st
st
st
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