A313-01-880 Issue A
Page 26 © Edwards Limited 2008. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Operation
4.2 Start-up
4.2.1 Pre-start checks
1. Check that the oil-levels are correct (refer to Section 3.5) and that the oil filler-plugs are tightened.
2. Check that there are no visible oil or water leaks. If there are any leaks, contact your supplier or Edwards for
advice.
3. Check that the HV pump is correctly installed, especially after initial installation and maintenance.
4.2.2 Start-up
1. Ensure that any isolation valves in the pump inlet and outlet pipelines are in the correct positions.
2. Switch on the cooling-water supply:
Check that there is an adequate flow of cooling-water at the correct pressure (see Section 2.4).
Check the water connections for leaks.
Close the backing pump air-admittance valve (if fitted).
3. Switch on the backing pump and open the backing valve (if fitted).
4. Switch on the motor electrical supply or engage your drive and transmission system to start the HV pump:
With DoL starting, you must only start the HV pump when the backing pressure is below the maximum
backing pressure for DoL starting: see Table 2. Otherwise, the pump may overheat.
5. Allow the HV pump to run for approximately fifteen minutes to achieve normal operating temperature.
6. Slowly open the pump-inlet isolation-valve (if fitted).
You can now use the pump as required in your application.
4.3 Shut-down
1. Close the pump-inlet isolation-valve (if fitted).
2. Leave the HV pump operating for sufficient time such that the pump is thoroughly purged of any hazardous
substances.
3. Switch off the motor electrical supply or disengage the drive and transmission system to stop the HV pump.
4. Open the backing pump air-admittance valve (if fitted) and switch off the backing pump.
5. Switch off the cooling-water supply.
Ensure that the correct grade of oil is used and that the oil-levels in the HV pump are correct. If
an incorrect oil is used or if an oil-level is incorrect, pump performance may be affected and the
pump may be damaged.
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