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2.3 PRIMARY (INPUT) ELECTRICAL CONNEC-
TION
This power source is a three-phase unit and must be
connected to a three-phase power supply. It is recom-
mended that the unit be operated on a dedicated circuit
to prevent impairment of performance due to an over-
loaded circuit.
ELECTRIC SHOCK CAN KILL! Before making elec-
trical input connections to the power source, "Ma-
chinery Lockout Procedures" should be employed.
If the connections are to be made from a line
disconnect switch, place the switch in the off posi-
tion and padlock it to prevent inadvertent tripping.
If the connection is made from a fusebox, remove
the corresponding fuses and padlock the box cover.
If it is not possible to use padlocks, attach a red tag
to the line disconnect switch (or fuse box) warning
others that the circuit is being worked on.
A. The primary power leads must be insulated
copper conductors. Three power leads and one
ground wire are required. Either rubber covered
cable or conduit (flexible or solid) may be used.
Table 2-1 provides recommended input conduc-
tors and line fuse sizes.
B. Remove the top cover. Identify primary power
input connections on the power switch, chassis
ground lug on the "A" frame, and primary input
terminal board. Refer to Figures 2-1 and 2-2.
C. When using the provided strain relief, refer to
Figure 2.1 for proper cable strip lengths. It is
important to follow the cable strip guide to en-
sure that if the primary input cable is ever pulled
from the strain relief, the input conductors will be
pulled from the ON/OFF power switch before the
ground lead is pulled from the ground lug. Once
stripped, thread the input and ground conduc-
tors through the large strain relief in the rear
panel of the power source. Connect the ground
wire to the terminal lug located on the right rear
A-frame leg inside the power source. Connect
the primary power leads to terminals L1, L2, and
L3 on the input power switch. Secure the strain
relief on the input cable.
The chassis must be connected to an approved
electrical ground. Failure to do so may result in
electrical shock, severe burns or death.
SECTION 2 INSTALLATION
2.1 LOCATION
A proper installation site is necessary for the power
source to provide dependable service. A proper instal-
lation site permits freedom of air movement through the
unit while minimizing exposure to dust, dirt, moisture,
and corrosive vapors. A minimum of 18 inches (46 cm)
is required between the side and rear panels of the
power source and the nearest obstruction. Also, the
underside of the power source must be kept completely
free of obstructions.
The selected site should also allow easy removal of the
power source outer enclosure for maintenance. See
Table 1.1 for overall dimensions of the unit.
2.2 RECEIVING, UNPACKING AND PLACEMENT
A. Immediately upon receipt of the power source,
inspect for damage which may have occurred in
transit. Notify the carrier of any defects or dam-
age.
B. Remove the power source from the container.
Remove all packing materials. Check the con-
tainer for any loose parts.
C. Check air passages at front and rear of cabinet,
making sure that no packing materials that may
obstruct air flow through the power source.
D. Install the lifting eyebolt furnished with the power
source into the top of the unit.
For lifting purposes and for keeping dust, mois-
ture, and other foreign material from entering the
power source, the lifting eyebolt must be fully
tightened with a tool.
E. After selecting an installation site (see para-
graph 2.1), place the power source in the desired
location. The unit may be lifted either by using
the lifting eyebolt or by forklift truck. If a forklift is
used for lifting the unit, be sure that the lift forks
are long enough to extend completely under the
base.
Do not use filters on this unit as they would restrict
the volume of intake air required for proper cooling.
Output ratings on this unit are based on an unob-
structed supply of cooling air drawn over its inter-
nal components. Warranty is void if any type of
filtering device is used.