Check The Direction Of Pump Rotation - Edwards Drystar EDP80 Series Instruction Manual

3.7

Check the direction of pump rotation

You must ensure that the direction of rotation of the pump is correct before you operate the
pump. If you do not, and the pump direction of rotation is incorrect, the inlet pipeline will be
pressurised and may be damaged and there will be a risk of injury to people or explosion or fire.
When you check the direction of rotation with the coupling cover guard removed, take suitable
precautions to prevent injury from the exposed rotating mechanisms.
Refit the coupling cover guard before you operate the pump. If you do not, there will be a danger
of injury from the rotating mechanisms of the pump.
1. Refer to Figure 1. Remove the push-on blanking-caps fitted to the pump-inlet (3) and pump-outlet (25).
2. Remove the four bolts which secure the coupling cover guard (14) to the coupling cover (on the opposite side of
the pump from the pump-outlet) and remove the coupling cover guard.
3. On pumps with a torque limiter watch the torque limiter plates, and on other pumps watch the coupling hub
(Figure 15, item 15), and switch on the pump for one or two seconds, then switch the pump off. Take suitable
precautions to prevent injury from the rotating torque limiter/coupling hub when you operate the pump with
the coupling cover guard removed.
4. If the torque limiter plates or coupling hub do not rotate in the correct direction (shown by an arrow on the
pump-motor, Figure 1, item 10), the direction of rotation is incorrect. If the direction of rotation is incorrect:
Isolate the pump from the electrical supply.

Reverse any two of the electrical supply phase-wires in the pump-motor terminal-box: refer to the motor

instruction manual.
Repeat Step 3 and

5. Refit the coupling cover guard
between 3 and 5 Nm.
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WARNING
WARNING
WARNING
4 to ensure that the direction of rotation is now correct.
(Figure 1, item 14) and secure with the four bolts. Tighten the bolts to a torque
A705-40-880 Issue B
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