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2.
Run the pump for 30 to 60 minutes.
Tip:
It is normal for the roughing pump temperature to increase during ballasting. To
maintain an ambient temperature of less than 40 °C in the space where the pump is located,
ensure the space is adequately ventilated.
3.
Use the flat-blade screwdriver to turn the gas ballast valve to the closed position
4.11.2
Gas ballasting a pump fitted with a handle-operated gas ballast
valve
Warning:
can be hot.
Notice:
To avoid damage, follow these guidelines:
•
do not vent the instrument when the roughing pump is gas ballasting.
•
do not gas ballast the roughing pump while the instrument is in Operate mode.
•
avoid gas ballasting the roughing pump for more than 2 hours.
To gas ballast the roughing pump:
1.
Move the gas ballast valve handle on the pump counterclockwise, from the horizontal
position to the vertical position.
2.
Run the pump for 30 to 60 minutes.
Tip:
It is normal for the roughing pump temperature to increase during ballasting. To
maintain an ambient temperature of less than 40 °C in the space where the pump is located,
ensure the space is adequately ventilated.
3.
Move the gas ballast valve handle on the pump clockwise from the vertical position to the
horizontal position.
To avoid burn injuries, take great care while working with the roughing pump; it
TP02654
September 7, 2016, 715003560IVD Rev. C
Page 53
.
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