Rockwell Automation 20L PowerFlex 700L Liquid-Cooled Adjustable Frequency AC Drive - Manual (Page 98)

4-10 Cooling Loop Installation
PowerFlex 700L Frames 2, 3A, and 3B Liquid-Cooled AC Drives User Manual
Publication 20L-UM001E-EN-P
Drive Coolant Requirements Recommended Coolants
Table 4.B lists approved sources and recommended coolants with
appropriate corrosion inhibitors for the drive loop.
Table 4.B Recommended Drive Loop Coolants
Non-premixed coolants require a coolant-to-water mix ratio of 50% by
volume.
Important: Since coolant performance slowly degrades over time, we
recommend replacing the drive loop coolant every two years
and/or whenever the loop is drained for servicing.
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 these chemical compounds:
• Sulfate and chloride
• Hard water ions such as Mg++ and Ca++
Source Coolant
Interstate Chemical
http://www.interstatechemical.com/
contact.htm
• NFP-50 (1)
; a 50/50 premix of propylene glycol and distilled water
• NFE-50 (1)
; a 50/50 premix of ethylene glycol and distilled water
Koolant Koolers/Dimplex Thermal
Solutions
http://www.koolantkoolers.com/
index.php/nic=contact
• K-Kool-E (1)
; ethylene glycol (available premixed with distilled water)
• Propylene glycol (1) also available
Dow Chemical
http://www.dow.com
• Dowtherm ® SR-1 (2) ; ethylene glycol
• Dowfrost ® (2)
; propylene glycol
Dowtherm and Dowfrost are registered trademarks of the Dow Chemical Company
(1) Available in 5 gallon pails.
(2) Not premixed with distilled water, and may not be available in 5 gallon quantities.
!
ATTENTION: Ethylene and propylene glycols must be
inhibited and silicate free. Use of common silicate-containing,
automotive-type ethylene glycol solutions is prohibited as they
can damage the heat exchanger and/or drive and cooling
module equipment.