Edwards nXDS10i nXDS15i, Инструкция по эксплуатации

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4. Installation
4.1 Safety
WARNING:
Obey the safety instructions in this section and take note of appropriate precautions.
If not, injury to people and damage to equipment can result.
Prevent any part of the human body coming into contact with the vacuum.
The nXDS pump is not intended for pumping explosive gases continuously (refer to
ATEX directive implication on page 9 ).
Ensure that the pump is suitable for the application. If in doubt, refer our guidelines on
vacuum pump and vacuum system safety, or contact us for advice.
A suitably trained and supervised technician must perform the installation of the pump.
Obey the safety instructions listed below, especially when connecting the pump into an
existing system. Details of the specific safety precautions are given at the appropriate
point in the instructions.
▪ Wear the appropriate safety clothing if contact with contaminated components is
anticipated. Dismantle and clean contaminated components inside a fume
cupboard.
▪ Vent and purge the vacuum system before starting installation work.
▪ Ensure that the installation technician is familiar with the safety procedures that
relate to the products handled by the pumping system.
▪ Disconnect the other components in the pumping system from the electrical
supply to prevent accidental operation.
4.2 System design considerations
Consider the following points when designing the pumping system:
We recommend you to use a foreline vacuum isolation valve to allow the pump to warm
up before pumping condensible vapours or if a vacuum needs to be maintained when
the pump is not running.
Use a suitable valve to isolate the pump from the vacuum system if the pump needs to
warm up before pumping condensable vapours or if vacuum needs to be maintained
when the pump is switched off.
Avoid high levels of heat input into the pump from the process gases, otherwise the
pump may overheat and cause the thermal protection system to operate.
Ensure that the exhaust pipeline cannot become blocked. If an exhaust isolation valve is
installed, ensure that the pump cannot be operated with the valve closed. Refer to
Connect to the vacuum system on page 28 .
Provide for a purge of inert gas when the pumping system is shut down, to dilute
dangerous gases to safe concentrations. Contact our Application team for further advice
on dilution requirements if required.
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A73501880_G - Installation