Edwards EH250FX

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Installation
A301-05-880 Issue A
3 Installation
3.1 Safety
 A suitably trained and supervised technician must install the pump.
 Ensure that the installation technician is familiar with the safety procedures which relate to the products
pumped.
 Wear the appropriate safety clothing when coming into contact with contaminated components.
 Dismantle and clean contaminated components inside a fume cupboard.
 Vent and purge the vacuum system before starting installation work.
 Check all required components are available and are of the correct type before starting work.
 Ensure that debris does not enter the EH pump during installation. The use of inlet mesh is recommended.
 Disconnect other components in the pumping system from the electrical supply so that they cannot be
operated accidentally.
 Do not reuse O-rings and seals.
 Ensure that the cooling air flow through the pump motor cooling fan cannot be obstructed.
 Ensure that all electrical cables, nitrogen pipelines and cooling water pipelines are safely positioned,
secured and routed, so that they do not present a trip hazard.
 Provide adequate access to all pump servicing points and oil level sight glasses.
 Leak test the system after installation work is complete and seal any leaks found to prevent leakage of
hazardous substances out of the system and leakage of air into the system.
3.2 System requirements
Consider the following points when designing the pumping system:
 Use a suitable backing pump: refer to Section 2.1 and 2.2.
 The EH pump must be mounted on a firm, level surface.
 Vacuum pipelines must be adequately supported to stop the transmission of stress to pipeline joints.
 If necessary, incorporate flexible pipelines in the system pipelines to reduce the transmission of vibration
and to prevent loading of the coupling joints. When using flexible pipelines, ensure that the flexible
pipelines have a maximum pressure rating that is greater than the highest pressure that can be generated in
the system. Ensure that vacuum loads are supported.
 Ensure that the design incorporates all appropriate safety precautions if toxic or particulates will be
pumped.
 Purge with an inert gas when shutting down the pumping system to dilute dangerous gases to safe
concentrations. Consult Edwards or the supplier for advice.
WARNING
Obey the safety instructions in this Section and take note of appropriate precautions. Failure to
observe these instructions may result in injury to people and damage to equipment.