Mechanical Installation; Electrical Installation - Edwards RV3 Instruction Manual

A652-18-880 Issue C
Your control must incorporate a manual reset device, which you must use to restart the system after a fault
condition.
The design of the pumps is such that it will not stop or limit the range of explosion flames or pressures if such
an explosion occurs in adjacent equipment. It is the users responsibility to consider this when he/she
undertakes the system design.
5.2

Mechanical installation

Consider the following points when you design your pumping system:
Unpacking, storage and disposal of all packaging.
Ensure both the motor and the pump have ATEX labels.
Position the pump using suitable lifting equipment.
Connect water supplies (E1M/E2M/175/275).
Check the integrity of all system connections.
The inlet and outlet connections are the interfaces between the pump and the process and exhaust lines.
The configuration of these connections is important and the connections must meet the requirements of
BS 4504 (for DN flanges) or ANSI B16.5 (ANSI flanges).
Connect the exhaust outlet to your exhaust system. Ensure that your system is capable of dealing with the
exhaust gases safely.
Make sure that the exhaust pipeline cannot become blocked. If you have an exhaust-isolation valve, make
sure that you cannot operate the pump with the valve closed.
Provide for a purge of inert gas when you shut down the pumping system, to dilute dangerous gases to safe
concentrations.
On the E1M/40/80/175 and 275 pumps, the gas ballast control may be open while purging the system with
inert gas or clean air. If for any reason the pump is switched off, the system pressure will increase due to the
drive shaft direction reversal. To prevent this, use an ATEX certified control valve suitable for use in the
required flammable zone.
5.3

Electrical installation

Obey the instructions given below and take note of the appropriate precautions. Failure to do so
will compromise the ATEX compliance and may cause harm, injury or death to persons.
The external thermal snap switch fitted to the body of the EM175 and EM275 rotary pumps must
be connected to an intrinsically safe circuit suitable for the hazardous zone in which it may be
located. Otherwise it must be located in a safe area. Failure to do so will compromise the ATEX
compliance and may cause harm, injury or death to persons.
The thermal trip (open when overheated) which is fitted to the motor of the RV3, 5, 8, 12 and
EM18/28 rotary pumps must be connected to an intrinsically safe circuit suitable for the hazardous
zone in which it may be located. Otherwise it must be located in a safe area. Failure to do so will
compromise the ATEX compliance and may cause harm, injury or death to persons.
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