Rockwell Automation 20L PowerFlex 700L Liquid-Cooled Adjustable Frequency AC Drive - Manual (Page 99)

Cooling Loop Installation 4-11
PowerFlex 700L Frames 2, 3A, and 3B Liquid-Cooled AC Drives User Manual
Publication 20L-UM001E-EN-P
The drive coolant 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)
• Viton seal (only Complete Drive)
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.
Drive Cooling Loop Specifications
* Inhibited ethylene glycol or propylene gylcol must contain a corrosion inhibitor. See Corrosion Inhibitor on
page 4-10 for an approved source.
Table 4.D lists the estimated amount of coolant needed for the drive loop
based on the drive frame size. For recommended drive loop coolants, see
Table 4.B .
Table 4.D Estimated Coolant Amount for the Drive Loop
Table 4.C Coolant Requirements for One Frame 2, 3A or 3B Drive
Drive
Frame Size Coolant
Temperature Range Minimum Coolant
Flow Rate Pressure Drop (2) From Drive Inlet to Drive
Outlet at Minimum Coolant Flow Rate
Coolant Type
2 0…50 °C (32…122 °F) 30.3 LPM (8 gpm) 1.58 bar (23 psi)
WEG50
(3)
or
WPG50 (4)
3A 0…40 °C (32…104 °F) 30.3 LPM (8 gpm) 0.35 bar (5 psi)
3B 0…40 °C (32…104 °F) 56.8 LPM (15 gpm)
(1)
0.48 bar (7 psi)
(1)
(1) Frame 3B includes separate converter and inverter power modules. A single inverter or converter power module requires a minimum flow rate of 30.3
LPM (8 gpm) at 0.35 bar (5 psi).
(2)
Pressure drop does not include any system connections such as hoses or piping. Cooling systems must be sized to provide minimum flow
considering entire system pressure drop.
(3) WEG50 equals good quality or distilled water with approved, inhibited* ethylene glycol, 50% glycol by volume.
(4) WPG50 equals good quality or distilled water with approved, inhibited* propylene glycol, 50% glycol by volume.
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)