Drive coolant requirements, Drive coolant requirements -3 – Rockwell Automation 20L-LL PowerFlex 700L Liquid-to-Liquid Heat Exchanger User Manual
Page 13
Installation
1-3
PowerFlex 700L Liquid-to-Liquid Heat Exchanger User Manual
Drive Coolant Requirements
lists approved sources and recommended coolants with
appropriate corrosion inhibitors
for the drive loop:
Non-diluted coolants require a coolant-to-water mix ratio of 50% by
volume.
Table 1.B
lists the estimated amount of coolant needed for the drive
loop based on the drive frame size.
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. See
Coolant from the Drive Loop for Periodic Replacement on
page 2-5
for instructions.
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++
Table 1.A Recommended Drive Loop Coolants
Source
Coolant
Interstate Chemical
http://www.interstatechemical.com/
contact.htm
• NFP-50
(1)
; a 50/50 premix of propylene glycol and
distilled water
; a 50/50 premix of ethylene glycol and
distilled water
(1)
Available in 5 gallon pails.
Koolant Koolers/Dimplex Thermal
Solutions
http://www.koolantkoolers.com/
index.php/nic=contact
• K-Kool-E
; ethylene glycol (available premixed with
distilled water)
• Propylene glycol
also available
Dow Chemical
http://www.dow.com
• Dowtherm
®
SR-1
(2)
; ethylene glycol
• Dowfrost
®
; propylene glycol
Dowtherm and Dowfrost are registered trademarks of the
Dow Chemical Company
(2)
Not premixed with distilled water, and may not be available in 5 gallon quantities.
Table 1.B Estimated Coolant Amount for the Drive Loop
Drive Size
Estimated Amount of Coolant
(1)
(1)
The estimated amount of coolant 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 (3/4 gal.).
Frame 2
15.1 liters (4 gal.)
Frame 3A
19 liters (5 gal.)
Frame 3B
19 liters (5 gal.)