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9.0 Operation
9.1 Continuous operation at a maximum vacuum is possible. The power
consumption of the vacuum system is at its lowest at this operating condition. In
case of no load operation, we recommend operation at this condition (e.g. with
the inlet blanked off from the process) rather than open flow to atmosphere.
9.2 In the case of liquid loss due to operation on dry air, the make-up water
supply solenoid will replace the water if operating properly. The amount of make-
up water is a constant 0.06 gallons per minute.
9.3 In the case that operating liquid builds up in the separator, the water will flow
out of the overflow connection located on the back of the unit.
10.0 Long term Shut-down
10.1 When shutting down the system for long periods (greater than
approximately one week), the system must be drained and protected from
corrosion.
10.1.1 Remove and lock out the power from the system. Disconnect the power
in such a way to ensure the system can not be accidentally restarted during the
period of storage.
10.1.2 Shut off the water to the ¼ inch make-up connection at the bottom of the
unit.
10.1.3 Open the drain valve on the operating liquid sump and remove all of the
water from the sump.
10.1.4. Remove the sheet metal top and side (one or two pieces, depending on
size).
10.1.5 Drain the liquid ring vacuum pump by removing the bottom drain
connections and collecting the water in a suitable container.
10.1.6 Replace the pump drain plugs.
10.1.7 Close the operating water sump drain valve.
10.1.8 Replace the sheet metal top and side.
10.2 If shutting down for very long periods (greater than 4 weeks) additional
precautions must be applied.
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