EN – 30
Start-up
• When using a three phase motor,
check the direction of rotation of the motor
(
see electrical connections page 24
).
•
Check the oil level
(
see page 20
).
•
Start-up the pump.
•
Allow the pump to run for one hour with the inlet blocked at ultimate
vacuum:
During this operation, make sure that the oil circuit is operating. Remove one of the oil
fill plugs to listen to the pump.
At start-up, the oil enters the lubrication circuit of the vacuum pump. As a result, noises
will be heard (
first irregularly, then regularly
) which will reduce as the oil heats up.
These noises will no longer be heard when the fill plug has been replaced.
Under normal temperature conditions, the oil circuit should start less than 1 minute
after start-up (
this time may vary with the type of oil and its degree of contamination
).
It is normal for the oil level to rise (
as can be seen through the oil sight glass
) when the
pump is hot due to expansion of the oil and starting or the oil circuit.
Start-up after pump disassembly
or oil change
Cold start-up
• Unscrew air inlet tube to the maximum extent to help oil circuit to start.
• Readjust antinoise system when the pump is hot.
Note : When you have pumped on dangerous products (corrosive, toxic...),
you must reheat the pump with an external device to reach the pump
starting temperature. Consult us.
Operation (cont’d)
When a pump must start cold (ambient temperature about 12 °C) or when
it has to start cold after pumping contaminating products or condensables,
proceed as follows:
See specific cases
page 43
.
In certain cases, when the pump is started up in cold ambient conditions, or with
slightly contaminated oil, the current after start-up may remain high until the oil in the
pump is heated up. These conditions are sufficient for the internal thermal protection
to be activated, making start-up impossible (
see electrical connections page 24
).
Before starting-up
the pump
Check periodically that the pipes and accessories (i.e. oil mist eliminator)
connected at exhaust are not clogged and that the purge is running.
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