51
Part No. 6-847703-00 Rev. C00
12. Tighten line regulator bracket mounting nuts.
13. Open line regulator isolation valves and set
line regulator's output pressure as described
in Line Regulator Pressure Adjustment
procedure.
14. Check all joints for leaks using an oxygen
compatible leak detector solution.
Service Procedures
Line Regulator Replacement
The following procedure describes process of
replacing line regulator. If necessary, line regulator
replacement can be performed while manifold is in
service. However, this should only be done by
qualified technicians experienced in servicing
medical equipment. Internal repair of line
regulator is not recommended.
1. Close two isolation valves on inlet and outlet
of line regulator to be replaced.
2. Loosen union nuts on two closed isolation
valves.
3. Remove two line regulator bracket mounting
nuts.
4. Remove line regulator and bracket from
manifold.
5. Noting regulator/bracket alignment, remove
regulator bracket from old regulator.
6. Install regulator bracket on new regulator.
Align bracket as noted above.
7. Noting orientation of fittings, remove fittings
from old regulator.
8. Install fittings on new regulator. Verify correct
orientation of fittings.
9. Inspect o-ring removed from each isolation
valve union. If damaged, replace o-ring.
10. Insert o-ring into each isolation valve and
attach new regulator and bracket to manifold's
base plate. Hand-tighten mounting nuts.
11. Tighten two isolation valve union nuts.
NOTE:
• Before removing fittings from old regulator
note orientation and depth of fitting in
regulator body. In order to align with isolation
ball valves, fittings must be installed into new
regulator at approximately same depth.
• Unused pressure ports in new line regulator
body will be shipped with pipe plugs.
• Refer to Techniques For Leak-Tight Fittings
for recommendations concerning removal and
reassembly of fittings.
Reserve In Use Switch Replacement
The following procedure describes process of
replacing reserve in use pressure switch.
1. Remove two front panel screws A (Figure 24).
Loosen two hinge screws B. Fold front panel
down to service position as shown in Figure
25. Lightly tighten two hinge screws.
2. Close 3/4" source shut-off valve above
manifold.
3. Disconnect power supply connector from
bottom of manifold cabinet.
4. Close all liquid containers and high-pressure
cylinders on both banks of manifold.
5. Close all high-pressure cylinders on high-
pressure reserve header.
6. Open vent valve and vent all pressure from
manifold system.
7. Using small blade screwdriver, remove violet
and blue pressure switch wires from control
board terminals. Note location of each wire.
8. Cut cable ties and remove pressure switch
wires from manifold's harness.
9. Verify all pressure has been vented. Remove
old pressure switch.
10. Apply Teflon tape to threads of new switch and
reinstall. Tighten switch so that switch
adjustment opening (Figure 26) is facing
toward right or left side of manifold.
WARNING:
Do not attempt replacement of reserve in use
pressure switch while manifold is in use.
Manifold must be depressurized before switch
can be removed.
