Rockwell Automation 20L PowerFlex 700L Frame 1X Liquid-Cooled Adjustable Frequency AC Drive - Manual (Page 12)

PowerFlex 700L Frame 1X Drive Installation Instructions – Publication 20L-IN013A-EN-P – June 2009
12
Recommended Coolants
Table 3 lists approved sources and recommended coolants with appropriate
corrosion inhibitors for the drive loop:
Table 3 Recommended Drive Loop Coolants
Non-premixed coolants require a coolant-to-water mix ratio of 50% by
volume.
The estimated amount of coolant needed for Allen-Bradley 20L-LL*
Liquid-to-Liquid Heat Exchangers is 15.1 liters (4 gal). This coolant
estimate is based on the heat exchanger using 1.2 m (4 ft) hoses. Longer
hoses require more coolant. The maximum hose length of 9.1 m (30 ft)
would require up to an additional 2.8 liters (0.74 gal).
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++
Step 3 Connect the Cooling Loop
Drive Coolant Requirements
Source Coolant Description
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 containers.
(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.