When you remove the EXT pump for maintenance or when you replace the EXT pump, you can
unscrew the three M4 cap-head fixing-screws to remove the water-cooler from the pump; you do
not have to break the cooling-water circuit. Make sure that there is a layer of thermal contact
grease on the water-cooler before you fit it to the pump.
3.7.2
Forced-air cooling
An air-cooler accessory is available for the EXT pumps (refer to Section 7). Fit the air-cooler as
described in the instruction manual supplied with it.
EXT250M Turbomolecular Pump
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