Edwards nES Series User Manual

5.2 Start the pump
CAUTION: EXCESSIVE ENERGY CONSUMPTION
Risk of damage to equipment. To avoid excessive energy consumpon and damage to
the vacuum pump the maximum allowed starng frequency is 6 starts per hour.
For more frequent operaon, let the pump operate connuously and control the
vacuum demand by a pitot valve on the pump inlet.
To start the pump:
1.
Check oil level and oil condion.
2.
Turn on the power.
5.3 During operaon
Note:
The operator must apply all relevant safety precauons. Refer to Safety precauons
during operaon on page 12 Safety precauons during operaon on page 9 and Fault
nding on page 39 Fault nding on page 43.
Regularly check the oil level and the oil condion. The oil level should be in the middle
of the oil sight glass. Refer to Prevenve maintenance schedule on page 31 Prevenve
maintenance schedule on page 35.
5.4 Stop the pump
We recommend running the unit o-line for typically 30 minutes with closed inlet valve
but open gas ballast prior to switching o. This will condion the oil ready for the next
start‑up. If the gas stream was heavily contaminated with water vapour, a longer period
of running the unit o-line will extend the oil lifeme.
If the pump is stopped before all the condensed vapour has been disposed o, it will be
deposited by gravity separaon from the oil on the boom of the oil aer about 8 to 10
hours.
Before restarng, check for any water in the oil tank-leads to an increase of the oil level
through the oil viewer (high water handling capability versions only). If there is water,
follow the instrucons in Prevenve maintenance schedule on page 31 Prevenve
maintenance schedule on page 35.
In case of long machine downme, refer to Taking out of operaon on page 30 Taking
out of operaon on page 34.
07/2020 - Page 33
A35104880_B - Operaon

Edwards nES Series Specifications

General

Brand	Edwards
Model	nES Series
Category	Water Pump
Language	English