B580-65-880 Issue G
Page 60 © Edwards Limited 2008. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
WCX water-cooler
11.3.2 Fit the water-cooler to the pump
1. Switch off the pump, isolate the pump controller from the electrical supply (on an EXT DX pump, isolate the
podule from the electrical supply), and wait until the pump has stopped rotating.
2. Continue at the appropriate procedure below, according to your model of water-cooler.
11.3.2.1 WCX250 and WCX500 water-coolers
1. If necessary, remove the old water-cooler from the pump, and retain the fixing screws.
2. Use the screws removed in Step 1, or the two or three screws supplied (depending on the pump model) to secure
the new water-cooler to the pump.
3. Remove the protective covers from the ends of the riffled nozzles.
4. Fit and secure your cooling-water hoses to the riffled nozzles. Ensure that you route the hoses away from any
electrical cables, wires and connections.
5. Briefly turn on the cooling-water supply and check for water leaks. Seal any leaks found.
11.3.2.2 WCX555 water-cooler
When you fit the WCX555 accessory, do not apply any thermal compound to either the water-cooler or the EXT
pump.
1. Fit the protective cover supplied with the pump to the pump-inlet, then turn the pump upside down.
2. Refer to Figure 33. Unscrew and remove the four pump mounting feet (4).
3. Use the four M8 x 25 cap-head screws (3, supplied with the water-cooler) to secure the cooling plate to the base
of the pump.
4. Refit the four pump mounting feet (4).
5. Remove the protective covers from the ends of the riffled nozzles.
6. Fit and secure your cooling-water hoses to the riffled nozzles. Ensure that you route the hoses away from any
electrical cables, wires and connections.
7. Briefly turn on the cooling-water supply and check for water leaks. Seal any leaks found.
11.4 Operation
Ensure that the cooling-water flow is correct for the pump operating conditions. Insufficient or excess cooling-
water flow can damage the pump.
Refer to your EXT pump instruction manual for:
z The operating conditions under which you must use water-cooling.
z The necessary cooling-water supply flow rates and temperatures.
Before you install the accessory, ensure that you switch off the pump and isolate the controller/
podule as described below.
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