InstallationItem no. 10202026, Revision 02 21 ( 36 )8.2 Diameter of media supply lineÜ The nominal size of the media supply lines can be found in the followingtable:DN Medium D1 D22.8 Compressed air 2.8 mm 7/64" 4 mm 5/32"4 Compressed air 4 mm 5/32" 6 mm 15/64"6 Compressed air 6 mm 15/64" 8 mm 5/16"5.5 Cooling water 5.5 mm 7/32" 8 mm 5/16"7 Cooling water 7 mm 9/32" 10 mm 25/64"8.3 Cooling water8.3.1 Quality of cooling waterDistilled water causes immediate corrosion on bare parts, which is often unno-ticeable at first, but later leads to serious corrosion damage.Ü Do not use pure or distilled water.Deposits in cooling channels due to unsuitable cooling water prevent the dis-sipation of heat.Ü Use cooling water with the following properties:Drinking water according to98/83/ECHardness 1-15°dHPH value 7-9Additive (corrosion protection) 20% Antifrogen N8.3.2 Setting the coolingÜ Observe the following values for liquid cooling:Hose diameter (*) Min. DN 5.5Feed temperature Min. 20°CVolumetric flow Min. 1.5 l/minReturn temperature Max. 40°C(*) Use cooling hoses that are impermeable to UV light.