Edwards nES Series, Инструкция по эксплуатации, Страница: 37 / 56

5.2 Start the pump
CAUTION: EXCESSIVE ENERGY CONSUMPTION
Risk of damage to equipment. To avoid excessive energy consumption and damage to
the vacuum pump the maximum allowed starting frequency is 6 starts per hour.
For more frequent operation, let the pump operate continuously and control the
vacuum demand by a pitot valve on the pump inlet.
To start the pump:
1. Check oil level and oil condition.
2. Turn on the power.
5.3 During operation
Note:
The operator must apply all relevant safety precautions. Refer to Safety precautions
during operation on page 12 Safety precautions during operation on page 9 and Fault
finding on page 39 Fault finding on page 43.
Regularly check the oil level and the oil condition. The oil level should be in the middle
of the oil sight glass. Refer to Preventive maintenance schedule on page 31 Preventive
maintenance schedule on page 35.
5.4 Stop the pump
We recommend running the unit off-line for typically 30 minutes with closed inlet valve
but open gas ballast prior to switching off. This will condition 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 off-line will extend the oil lifetime.
If the pump is stopped before all the condensed vapour has been disposed off, it will be
deposited by gravity separation from the oil on the bottom of the oil after about 8 to 10
hours.
Before restarting, 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 instructions in Preventive maintenance schedule on page 31 Preventive
maintenance schedule on page 35.
In case of long machine downtime, refer to Taking out of operation on page 30 Taking
out of operation on page 34.
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A35104880_B - Operation