Rockwell Automation 20GY PowerFlex 755 with OEM Liquid Cooling Frame 6 and 7 AC Drives - Manual (Page 9)

Rockwell Automation Publication 20GY-IN001A-EN-P - June 2011
PowerFlex® 755 with OEM Liquid Cooling Frame 6 and 7 AC Drives 9
Corrosion Inhibitor
If an approved coolant is not used, the drive coolant must consist of clean water
with a corrosion inhibitor. An approved corrosion inhibitor is Chemtool, Inc.
(www.chemtool.com) part number Watertool 4435-C. The recommended
concentration of the inhibitor is 8…10% by volume. Deionized water is
prohibited. Use distilled water or water with less than 50 ppm concentrations of:
• Sulfate and chloride
• Hard water ions such as Mg++ and Ca++
The coolant for the drive must be compatible with the following materials:
• Copper
• Brass
• Aluminum
• Arimid fiber gasket with nitrile binder (Garlock, Inc. Blue-Gard 3000®)
Blue-Gard 3000 is a registered trademark of Garlock, Inc.
• Synthetic rubber hose (Parker Hannifan Corp 801 General Purpose Hose)
• Neoprene®
Neoprene is a registered trademark of DupontDow.
Biocide
A biocide may be needed to control biological growth. Use of a biocide is
permitted. For specific recommendations, consult a reputable water treatment
company.
ATTENTION: Ethylene glycol or propylene gylcol must be inhibited and
silicate free. Use of common silicate-containing, automotive-type
ethylene glycol solutions is prohibited, as they may damage the
heat exchanger and/or drive and cooling equipment.