Earth (Ground) Connection; Check The Direction Of Rotation; Example Electrical Control Circuit - Edwards HV8000 VF Instruction Manual

A311-03-880 Issue A
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).

1. Electrical supply isolator
2. +ve control side
3. Thermistor/thermostat relay
4. Stop switch
5. Start switch
6. Fault indicator lamp
3.10

Check the direction of rotation

Obey the safety instructions given below. If you do not, you can cause injury to people or damage
to the pump/motor.
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.
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Figure 8 - Example electrical control circuit
WARNING
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7. Pump contactor
8. 0 V control side
9. Pump motor
10. Contactor
11. Circuit breaker
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