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Installation
B800-00-880 Issue A
3.9.3
Water-cooling
CAUTION
You must turn off the cooling-water when you switch off the pump to prevent condensation inside the pump and
Controller.
A WCX water-cooler accessory is available for the nEXT pumps (refer to
). Fit it as described in the
instruction manual supplied with it. The cooling-water supply must comply with the specification given in
. Pipes in the water-cooling circuit may become blocked if the cooling-water contains too much calcium
carbonate or if it contains particles that are too large. Corrosion of the water-cooling circuit may occur if there is
too little calcium carbonate and oxygen in the water. Good quality drinking water is usually suitable. If in doubt,
check the quality of your cooling-water supply and, if necessary, provide treatment and filtration.
Connect the cooling-water supply to the water-cooler on the pump as described below. Either of the two push fit
connectors on the water-cooler can be used for the water supply or return connections.
Push nylon hose (approximately 10 mm outer diameter) into the ends of the hose connectors on the water-cooler on
the pump. Alternatively, remove the hose connectors from the water-cooler and make direct connections to the 1/
8 inch BSP female threaded fittings on the water-cooler.
If you want to remove the pump for maintenance, and you do not want to break the cooling-water circuit, unscrew
the two M4 fixing-screws and remove the water-cooler from the pump.
CAUTION
Condensation may occur if a water cooling block is used in high humidity environments. Protect the pump and
other equipment by considered design of the installation; refer to Figure 16 for recommendations.
Figure 17 - Maximum relative humidity to avoid condensation with water cooling
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