Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 225)

4-20 Commissioning
7000L-UM300I-EN-P – June 2013 7000 “C” Frame
Liquid-Cooling Connections
Drives with a Liquid-to-Air Heat Exchanger will require external
piping from the heat exchanger to be connected to the inlet and outlet
pipe fittings on the back of the cooling section. The materials that
are allowed are listed on page 2-60.
Figure 2.17 shows the cross-section of the internal connection, and
the external connection needs to have the same cross-section. The
connection point requires a gasket between the 2 fittings, and the 4
connection bolts should be tightened sufficiently to ensure a leak-
proof connection without cracking the plastic fittings. Refer to
Appendix B for torque values.
The rear view of the cooling cabinet shown in Figure 2.16 shows the
location of the inlet and outlet for the drive cooling system. It is very
important to connect the outlet of the drive to the inlet of the heat
exchanger, and the outlet of the heat exchanger to the inlet of the
drive. Reversing these connections will limit the heat exchanger
efficiency.
Drives with a Liquid-to-Liquid Heat Exchanger will require external
piping from the heat exchanger to be connected to the inlet and outlet
pipe fittings on the internal heat exchanger in the cooling cabinet.
Figure 2.19 shows the cross-section of the internal connections, and
the external connection needs to be compatible with a 1.00 inch NPT
female connector. The drawing clearly indicates that the S1
connection is the inlet, and the S2 connection is the outlet.
Please refer to pages 4-51 to 4-57 when commissioning the drive
cooling system.