6.6 Start-up
Before switching on, always make sure that the pump contains enough oil. The normal
oil level is in the middle of sight glass. If oil has to be added, unscrew the oil-fill plug, add oil
and screw the plug firmly back in.
To avoid overloading the motor, do not start the pump more than six times within one
hour. If frequent starts are needed, the pump should run continuously and be linked to the
vacuum vessel by means of a valve. In that case, regulation will be made by the valve and
not by start/stop of the pump. With the valve closed, the pump consumes little energy.
Never expose part of the body to the vacuum. There is a danger of injury. Never
operate the pump with an open and thus accessible inlet. Vacuum connections as well as oil
filling and oil draining openings must not be opened during operation of the pump.
Do not lay the hand on the intake to check vacuum.
Exposure of a part of the body to the vacuum result in a rush of blood in the exposed
part.
6.7 Operation
The pump gases and vapors provided that the gas ballast valve is installed and open
and the pump has reached its operating temperature.
The motor manufacturer guarantees a maximum of 6 starts per hour. To avoid
exceeding 6 starts per hour, run the pump continuously and regulate the vacuum in your
system with a pilot valve
Pump in operation is hot and some surfaces could reach a temperature higher than 80
°
C . There is a risk of burn by touching. Take note of warning labels on the pump.
6.7.1 Pumping of Non-condensable Gases
If the process contains mainly permanent gases, the pump can be operated without gas
ballast, provided that the saturation vapor pressure at operating temperature is not
exceeded during compression.
If you do not know the composition of the gases to be pumped, and if you can’t rule
out the possibility of condensation, run the pump with gas ballast valve open in accordance
with Section 6.7.2 .
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