Rockwell Automation Liqui-Flo AC Power Modules - Manual (Page 47)

Mounting the Drive, Grounding, and Finding Wire Routing Locations 4-7
4.4 Grounding the Drive
Use the following steps to ground the drive:
Step 1. Open the door of the enclosure.
Step 2. Run a suitable equipment grounding conductor unbroken from the drive to
the motor’s ground terminal and then to earth ground. (For B and C-frame
drives, use one of the bolts that pass through the drive baseplate and are
used to fasten the drive to the wall or cabinet. For D-frame drives, use the
ground stud provided.) See figures 4.1, 4.2, 4.3, 5.1, and 5.2. Tighten these
grounding connections to the proper torque as shown in table 5.1.
Step 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 5.1.
Step 4. Close the door of the enclosure.
4.5 Connecting Coolant Lines
LiquiFlo drives are rated for use with clean, potable water as the coolant. Coolant must
be properly filtered to ensure it is free from contamination. Some coolant fluids may
allow an increased output rating while others may require a derating. For LiquiFlo
drive M/N 41LR4060, contact Reliance Electric for additional information.
4.5.1 B-Frame Coolant Connections
B-frame LiquiFlo drives have inlet and outlet coolant connections as shown in figure
4.5. The inlet and outlet connectors are 3/4” nominal, 7/8” O.D. copper sweat fittings.
Use the appropriate sweat fittings attached to hoses or copper tube for the coolant
supply and return lines. Supply and return lines should be sized for 9 gpm/120 psi
service with a maximum operating temperature of 40°C (104°F). Actual operating flow
rate through the drive is 8 gpm at 10 psi. It is recommended that a flow switch be
installed after the coolant outlet to shut off the drive if coolant flow drops below 4 gpm.
It is also recommended that the water pump not be powered unless the drive is also
powered. Failure to do this may result in condensation accumulating on the casting
and/or circuit boards, which could damage the drive.
4.5.2 C-Frame Coolant Connections
C-frame LiquiFlo drives have inlet and outlet coolant connections as shown in figure
4.6. The inlet and outlet connectors are size 10, SAE 37° flare female fittings. Use the
appropriate male fittings attached to hoses or for the coolant supply and return lines.
These fittings should be torqued to 80 Nm (60 ft-lb). Supply and return lines should be
sized for 5 gpm/120 psi service with a maximum operating temperature of 40°C
(104°F). Actual operating flow rate through the drive is 5 gpm at 30 psi. It is
recommended that a flow switch be installed after the coolant outlet to shut off the
drive if coolant flow drops below 4 gpm. It is also recommended that the water pump
!
ATTENTION: The user is responsible for conforming with all applicable
local, national, and international codes. Failure to observe this precaution
could result in damage to, or destruction of, the equipment.