Rockwell Automation LPM20 Liquid-Cooled AC Drive with High Performance Drive Control - Manual (Page 26)

1-14 Installation/Wiring
2. Run a suitable equipment grounding conductor unbroken from the drive
to the motor’s ground terminal and then to earth ground. Use one of the
bolts that pass through the drive baseplate and are used to fasten the drive
to the wall or cabinet. See
Figure 1.6 . Tighten these grounding
connections to the proper torque as shown in Table 1.D .
3. Connect a suitable grounding conductor to the motor frame and the
remote control station (if used). Run each conductor unbroken to earth
ground. When adding more than one grounding conductor wire to a
single chassis ground, twist the conductors together. Tighten these
grounding connections to the proper torque as shown in
Table 1.D .
4. Close the door of the enclosure.
Coolant Considerations LPM20 drives use o-ring face seal fittings for connection to the coolant
supply. The coolant is typically clean water with a corrosion inhibitor as
described in this section.
LPM20 drive coolant connections are made with o-ring face seal fittings.
The copper tube running from the heatsink to the o-ring fittings is covered
with closed cell foam insulation.
The mating connection is shown in Figure 1.7 . The mating process includes
the following steps:
1. Coat the o-ring with the o-ring lubricant. The goal is a thin film covering
the entire o-ring surface. Avoid excess globs of lubricant.
2. Insert the o-ring into the o-ring groove in the external thread-side fitting
on the user side. Avoid any twisting of the o-ring.
3. Assemble the fittings and tighten to a torque of 37 to 45 N-m (or 27 to 33
lb.-ft.). Use a backup wrench on the user side fitting to avoid twisting the
drive side tubing.
Figure 1.7 Mating Connection
DRIVE SIDE CONNECTION USER SIDE CONNECTION
ORFS Nut
(Parker p/n 10-BL-B)
ORFS Braze Adapter
(Parker p/n 10-LOHB3-B)
ORFS Braze Sleeve
(Parker p/n 10-TL-B)
O-Ring, Neoprene
(Parker p/n 2-016-CO873-70)
O-Ring Lubricant
(Parker p/n 884-2GRAMS-LUBE)
5/8-inch O.D.
Copper Tube
Backup Wrench
(Use to prevent twisting
during nut tightening.)
5/8-inch O.D.
Copper Tube