8 start-up, 9 troubleshooting – Watson-Marlow 621CC User Manual

Page 9

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8 Start-up

Before starting and after prolonged storage of the gear units, remove the plug from the
vent screw on top of the casing to avoid excessive pressure in the gearbox, which may
cause leakage at the shaft seals.

9 Troubleshooting

Should the pump fail to operate, make the following checks to determine whether or not
servicing is required.

Check the electrical supply is available at the pump.

Check that the pump is not stalled by incorrect fitting of tubing.

If the pump is fitted with an electrical guard switch option: press the reset button
after the pumphead guard has been closed.

Always check to ensure that an Exd motor gearbox is suitably rated for
the hazardous zone area in which it is to be mounted. Exd motors should
only be installed by Exd qualified personnel.

Page 9 of 46

Watson-Marlow Bredel E-Manuals

21/12/2011

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