Edwards EXT75DX, Instruction Manual

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© Edwards Limited 2018. All rights reserved. Page 17
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Installation
B722-40-880 Issue H
3 Installation
3.1 Unpack and inspect
Take care when unpacking the pump to avoid excessive shocks that could damage the bearings and reduce the life
of the pump. The pump is supplied with the inlet and outlet sealed to prevent entry of dust and vapour. Do not
remove these seals until the pump is installed on the vacuum system.
Remove all packing materials and check the pump. If the pump is damaged, notify the supplier and the carrier in
writing within three days; state the Item Number of the pump together with the order number and the supplier's
invoice number. Retain all packing materials for inspection. Do not use the pump if it is damaged.
Check that the package contains the items listed in Table 13 . If any of these items is missing, notify the supplier in
writing within three days.
If the pump is not to be used immediately, store the pump in suitable conditions, following the procedure described
in
Section 6.1 .
Do not discard the packing materials; retain them to re-package the pump if it is returned for service.
Note: An inlet strainer is not available for the NW16 interstage port of the EXT75iDX.
Note: Contact Edwards for details of the EXT75iiDX variants.
3.2 Typical installation
A typical pumping system with a DX pump is shown in Figure 4 .
The accessories available for the DX pumps are detailed in Section 7.4 ; the accessories are shown in Figure 8 .
3.3 Connection to the vacuum system
Edwards recommends leak testing the system after installation has been completed.
Table 13 - Checklist of components
Quantity Description Check (

)
1 DX pump with inlet screen fitted 
1 Inlet seal (either trapped O-ring, Co-seal or copper compression
gasket suitable for the inlet flange type)

1 Connector (24 V) - for driving accessories from Podule socket 
1 Inlet strainer (iDX fitted in the NW25 interstage port only)

WARNING
Ensure that all wires and piping are routed appropriately to avoid the risk of tripping.
WARNING
Install the pump in the vacuum system before the logic interface cable is connected to the control
equipment and before the electrical supply is connected. This will ensure that the pump cannot
operate accidentally causing injury to people.