Operation; Use Of Gas Ballast Control (If Fitted); Start Up Procedure; To Achieve Ultimate Vacuum (If Gas Ballast Fitted) - Edwards XDS100B Instruction Manual

5. Operation

5.1 Use of gas ballast control (if fitted)

The XDS100B booster does not have a gas ballast option, condensation is not likely to
occur in the pump, as the normal operating pressure is too low.

5.2 Start up procedure

WARNING:
Ensure that the system design does not allow the exhaust pipeline to become
blocked.
CAUTION:
A fine dust may be emitted from the exhaust of the scroll pump during start up,
particularly when the pump is new or if new tip seals are fitted.
To pump down large volumes from atmospheric pressure, the backing pump should be
started first, and the booster should be started only when system pressure has fallen to
100 mbar. For small volumes (< 15 litres), it is acceptable to start both pumps
simultaneously.
Use the procedure below to start up the pump:
1. Ensure that any vacuum system isolation valve is closed (if fitted).
2. Connect a suitable lead from the power supply to the appliance inlet at the side of
the pump.
3. Switch on the electrical supply to the pump, using the Run/Standby switch. Item 8
on
4. With manual operation always use the Run/Standby switch to start/stop the pump.
If remote operation is used to control the pump, refer to
15-way D connector
5. Open the vacuum system isolation valve (if fitted).

5.3 To achieve ultimate vacuum (if gas ballast fitted)

In order to achieve the best possible vacuum, the primary pump backing the booster
should be operated without the gas ballast. If atmospheric moisture is present run the
backing pump with the gas ballast control for 20 minutes before removal of the gas
ballast.

5.4 To pump condensable vapours (if gas ballast fitted)

Due to the low pressures throughout the XDS100B mechanism condensation is not likely
within the booster pump. Please refer to the instruction manual of the booster backing
pump for recommendations of gas ballast configuration for vapour handling.
A73201880_G
A73201880_G - Operation
Figure: General view.
on page 23.
Page 21
Remote operation using
05/2022 - ©Edwards Limited