Installation; Safety; System Design - Edwards E2M28 Instruction Manual

3

Installation

3.1

Safety

If a hydrocarbon oil is used in this pump, do not use the pump to process oxygen in concentrations
greater than 25% in volume. If the oxygen concentration is greater than 25%, there is a risk of fire
or explosion in the oil-box of the pump.
Do not use the E2M28 or E2M30 pump to pump hazardous substances.
Obey the safety instructions listed below 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.
A suitably trained and supervised technician must install the pump.

Wear the appropriate safety-clothing when coming into contact with contaminated components.

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 pump-oil and

the products processed 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.
Safely route any electrical supply cables so that they cannot accidentally trip people.

Ensure that the E2M28 or E2M30 pump is suitable for the application. If there is any doubt as to the

suitability of the pump for the application, refer to the Edwards guidelines on vacuum pump and vacuum
system safety (refer to the Associated Publication at the end of the contents list at the front of this manual).
3.2

System design

Consider the following points when designing the pumping system:
Use a suitable inlet-valve to isolate the pump from the vacuum system to allow the pump to warm up before

pumping condensable vapours, or to maintain vacuum 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 has a high gas throughput, the temperature of the

pump-body may exceed 70°C. Fit suitable guards to prevent contact with hot surfaces.
Make sure that the exhaust pipeline cannot become blocked. If an outlet-isolation valve is fitted, make sure

the pump cannot be operated with the valve closed.
© Edwards Limited 2014. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
WARNING
WARNING
WARNING
A373-10-880 Issue T
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