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Part No. 6-847703-00 Rev. C00
Secondary Supply Switch Adjustment
The following procedure describes process of
setting “Secondary Supply” pressure switches.
This procedure should only need to be performed
if secondary supply pressure switches were not
within acceptable limits during the performance
verification procedure.
Secondary supply pressure switches are
normally open type that close when pressure in
excess of switch setting is applied. When
pressure is applied to both banks of manifold, both
pressure switches are closed. Switches should
always be adjusted as pressure decreases. If
pressure switch can not be set, switch must be
replaced. Pressure switches are not repairable.
Refer to Figure 19 for location of components
called out in this procedure.
Left Switch Adjustment:
1. Verify at least one liquid container is open on
left bank of manifold.
2. Verify left bank green “IN USE” indicator is
illuminated.
3. Close all liquid containers on left bank.
4. Slightly open vent valve to create a small flow
of gas through manifold. Left front panel bank
pressure gauge should begin to drop. Adjust
vent valve so that gauge drops very slowly.
5. Note gauge reading when manifold switchover
takes place. Recommended settings are
listed in Table 1, page 27 (Left Secondary
Supply Switch).
6. Close vent valve.
7. If switch adjustment is necessary, slide collar
of switch toward wires to access internal
adjustment barrel. Insert tip of small
screwdriver into adjustment barrel and rotate
barrel (Figure 26).
Line Regulator Adjustment
The following procedure describes process of
setting line regulator pressure. This procedure
should only need to be performed if line regulator
pressures were not within acceptable limits during
Performance Verification procedure or after
installation of a new line pressure regulator.
When shipped from factory, inlet and outlet
isolation valves to both line regulators are in open
position. Refer to Figure 19 for location of
components called out in this procedure.
1. Open two right-side line regulator isolation
valves and close two left-side line regulator
isolation valves.
2. Slightly open vent valve to create a small flow
of gas through manifold.
3. Using 6mm Allen wrench, turn right line
regulator adjusting screw for an appropriate
front panel output pressure gauge reading.
Note reading for later use. Recommended
settings are listed in Table 1, page 27 (Line
Regulator).
4. Open two left-side line regulator isolation
valves and close two right-side line regulator
isolation valves.
5. Using 6mm Allen wrench, turn left line
regulator adjusting screw for same outlet
pressure gauge reading noted in step 3.
6. Close vent valve.
7. Open two right-side line regulator isolation
valves. Verify all four line regulator isolation
valves are open.
NOTE:
If inlet and outlet isolation valves for both line
regulators are open, manifold's outlet pressure
gauge will indicate pressure of line regulator with
highest setting. Verify setting of each regulator
individually as described in following procedure.
Testing and Adjustments
