Operations and Maintenance Manual Universal Vacuum System
Version 1.2—March 2004 Page 21
OPERATING MODES
The Universal Vacuum System has a Normal Operating mode and an automatic Water
Purge mode. It provides vacuum continuously, even while in the Water Purge mode.
Note: The following diagrams are simplified. See drawing 289001P1 for
design information.
NORMAL OPERATING MODE
During normal operations, water is drained from the vacuum tank to the drain tank by
gravity, since both are under equal pressure (vacuum). Air pressure, regulated to 80 psi by
the pilot pressure regulator, is routed through solenoid 2 and activates all three pneumatic
valves (see diagram).
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