Edwards A311-01-985, Instruction Manual

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A311-03-880 Issue A
Page 24 © Edwards Limited 2014. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Installation
3.9 Earth (ground) connection
Refer to Figure 1 for the location of the earth (ground) stud on HV8000 pumps.
Note that:

We recommend that you connect the earth (ground) stud to a suitable factory/plant earth (ground).
Figure 8 - Example electrical control circuit
3.10 Check the direction of rotation

Blank the inlet or connect the HV8000 pump to the vacuum system before you check the direction of pump
rotation. If you do not, there is danger of objects being trapped in the rotating pump rotors.

Ensure that you do not come into contact with the shaft, the coupling/belt or the drive system when you
operate the pump. If you do, you may be injured by the rotating components.
WARNING
Obey the safety instructions given below. If you do not, you can cause injury to people or damage
to the pump/motor.
1. Electrical supply isolator
2. +ve control side
3. Thermistor/thermostat relay
4. Stop switch
5. Start switch
6. Fault indicator lamp
7. Pump contactor
8. 0 V control side
9. Pump motor
10. Contactor
11. Circuit breaker