A708-01-880 Issue E
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Edwards and the Edwards logo are trademarks of Edwards Limited.
Installation
z Use a flexible connection in the pipeline from the process system to the pump to reduce vibration and stress
in the system pipelines.
Use the following procedure to connect the pump inlet to the process system. Do not allow debris to get into the
pump during installation. Refer to Figure 1, 2 or 3.
1. As supplied, both IDX pumps and CDX pumps without flame arrestors have an inlet filter in the pump inlet (6):
z If installing the pump in a new process system, leave the filter in the pump inlet to prevent the entry of weld
particles or other debris into the pump. Remove the filter in Section 5.6.
z If installing the pump in an existing process system which does not contain any debris that could damage the
pump, remove the filter from the pump inlet.
2. Use suitable bolts to connect the pump inlet (6) to the process system. Use a suitable PTFE gasket to seal the
connection. Edwards recommends using the gasket type specified in Section 2.9.
3.15.2 Connect the pump outlet
Install an outlet catchpot to prevent the drainage of condensate back into the pump. If not, condensate which
drains back into the pump may damage it or cause it to seize.
Use suitable bolts to connect the pump outlet (Figure 1, 2 or 3, item 16) to the exhaust system. Use a suitable PTFE
gasket to seal the connection. Edwards recommends using the gasket type specified in Section 2.9.
The exhaust pipeline system must be designed so that the pressure in the pipeline during pump operation is less than
1.15 bar absolute (1.15 x 10
5
Pa, 16.7 psi) for the CDX/IDX1000 and less than 1.05 bar absolute (1.05 x 10
5
Pa,
15.25 psi) for the IDX1300. If the pressure in the pipeline is higher than this pressure, the pump will operate at a high
temperature and may trip (because of excessive electrical current consumption) or seize.
Support the exhaust pipelines to prevent the transmission of stress to the pipeline coupling-joints.
If using flexible bellows, ensure bellows which have a maximum pressure rating which is greater than the highest
pressure that can be generated in the system are used.
Connect the pump outlet to a suitable exhaust treatment plant, to prevent the discharge of
dangerous gases and vapours into the surrounding atmosphere.
Incorporate safety devices to prevent operation of the pump when the exhaust pipeline is
restricted or blocked. If not, the exhaust pipeline may become over-pressurised and may burst.
For ATEX pumps only. Install the pump outlet in such a way so that a backflow of pumped media is
reliably prevented after the pump has been switched off. If an inlet valve is fitted to the inlet of
the vacuum pump, it will prevent backflow of pumped media when the pump is shut down.
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