© Edwards Limited 2013. All rights reserved.
Page 9
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Installation
A371–22–880 Issue R
3
Installation
3.1
Safety
You must ensure that the pump is suitable for your application, If you have any doubts as to the suitability of the
pump for your application, refer to the Edwards guidelines on vacuum pump and vacuum system safety (see the
Associated publication at the end of the contents list at the front of this manual).
A suitably trained and supervised technician must install your pump. Obey the safety instructions listed below when
installing the pump, especially when connecting the pump into an existing system. Details of specific safety
precautions are given at the appropriate point in the instructions.
Wear the appropriate safety-clothing when in contact with contaminated components.
Vent and purge the vacuum system before installation work is started.
Ensure that the installation technician is familiar with the safety procedures that relate to the pump-oil and
the products handled by the pumping system. Take suitable precautions to avoid the inhalation of oil mist
and excessive skin contact with pump-oil, as prolonged exposure can be harmful.
Disconnect the other components in the pumping system from the electrical supply so that they cannot be
operated accidentally.
3.2
System design
Consider the following points when designing your pumping system:
Use a suitable valve to isolate the pump from the vacuum system, if the pump needs to warm up before
condensable vapours are pumped, or if the vacuum needs to be maintained when the pump is switched off.
Avoid high levels of heat input to the pump from the process gases, otherwise the pump may overheat and
seize, and cause the motor thermal overload device to open.
If the pump is used in a high ambient temperature and have a high gas throughput, the temperature of the
pump-body may exceed 70°C (158°F) and suitable guards must be fitted to prevent contact with hot
surfaces.
Make sure that the exhaust pipeline cannot become blocked. If an exhaust-isolation valve is fitted, make
sure the pump cannot be operated with the valve closed.
Provide for a purge of inert gas when the pumping system is shut down, to dilute dangerous gases to safe
concentrations. A suitable gas-ballast control valve for introduction of purge gas into the pump is available
as an accessory (refer to
).
WARNING
If a hydrocarbon oil is used in this pump, do not use the pump to process oxygen in concentrations
greater than 25% in volume. There is a risk of fire or explosion in the oil-box of the pump.
WARNING
Edwards recommend that the E2M0.7 or E2M1.5 pumps are not used to pump hazardous
substances.
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 from coming into contact with the vacuum.
