Connection Of Additional Thermal Protection Devices; Check The Direction Of Rotation - Edwards E2M40 Instruction Manual

5.3.3 Connection of additional thermal protection devices

EM40/80 pumps
No additional thermal protection devices are required.
EM175/275 pumps
The external thermal snap switch located on the body of the pump, must be connected to an
intrinsically safe circuit in accordance with EN60079-7 and installed in accordance with
EN60079-14. Electrical apparatus for use in potentially explosive atmospheres - Intrinsic
safety "i" for use with simple apparatus suitable for the classification of the hazardous zone
in which the pump will be located.
If this is not possible, the circuit should be placed in a safe zone.

5.3.4 Check the direction of rotation

CAUTION:
Ensure that the pump‑motor rotates in the correct direction. If it does not, the pump and
your vacuum system can become pressurised.
1. Correct direction of rotation is anti clockwise when looking on the motor fan.
2. Watch the motor fan, switch on the supply to the motor for a few seconds, and then
switch off.
3. If the direction of rotation is incorrect, isolate the motor from the supply and
reconfigure the electrical connections to the motor; refer to the manufacturer's
recommended installation instructions supplied with the motor.
4. Repeat the above check to ensure the direction of rotation is correct.
A36418880_A - Installation
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