Cooling Loop Installation 4-7
PowerFlex® 700L Liquid-Cooled Drive User Manual
Publication 20L-UM001D-EN-P
Drive Coolant Requirements
Recommended Coolants
Table 4.F lists approved sources and recommended coolants with
appropriate corrosion inhibitors
for the drive loop:
Table 4.F Recommended Drive Loop Coolants
Non-premixed coolants require a coolant-to-water mix ratio of 50% by
volume.
For an estimated amount of coolant needed for Allen-Bradley 20L-LL*
Liquid-to-Liquid Heat Exchangers, refer to Table 4.B
.
Important: Since coolant performance slowly degrades over time, the drive
loop coolant should be replaced 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:
• 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
may damage the heat exchanger and/or drive and cooling
module equipment.
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