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UM582127000 User Instructions
Issue AC, January 2, 2013 Spec. No. 582127000 (Model 721NPBB)
Page 54 Chapter 4. Troubleshooting and Repair
This document is property of Emerson Network Power, Energy Systems, North America, Inc. and contains confidential and proprietary information owned by Emerson Network Power, Energy
Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
Installing the Distribution Panel
Note: In the following procedure, before making busbar-to-busbar connections, apply a
thin coating of electrical anti-oxidizing compound to the mating surfaces of the
busbars.
1) Orient the replacement distribution panel into distribution cabinet, checking to
ensure no wires are pinched. Replace the hardware securing the distribution
panel to the distribution cabinet (10-32 x 5/8” bolt, #10 flat washer, 4-places).
2) For dual voltage load distribution panels, replace the hardware securing the
+24V jumper leads (1/4-20 bolt, 1/4” lock washer, 1/4” flat washer. Torque to 84
in-lbs).
3) For battery distribution panels, replace the hardware securing the panel’s
Battery Busbar to the distribution cabinet’s busbar (3/8-16 x 1-1/4” bolt, 3/8”
Belleville lock washer, 3/8” hardened flat washer, 2-places. Torque to 180
in-lbs.)
4) For load distribution panels, replace the hardware securing the panel’s System
Load Distribution busbar to the distribution cabinet’s busbar (1/4-20 x 1” bolt, 1/4”
Belleville lock washer, 1/4” Belleville lock washer (concave side of Belleville lock
washers face each other), 1/4” hardened flat washer, 2-places. Torque to 60
in-lbs).
5) Replace the hardware securing the panel’s Ground Busbar (if equipped) to the
distribution cabinet’s busbar (1/4-20 x 1” bolt, 1/4” Belleville lock washer, 1/4”
Belleville lock washer (concave side of Belleville lock washers face each other),
1/4” hardened flat washer, 2-places. Torque to 60 in-lbs).
6) Locate the in-line FA/CBA connector located near the back of the panel, and plug
it into the mating connector half in the distribution cabinet.
7) On panels equipped with shunts, reconnect the shunt leads.
Warning: In the next step, observe correct polarity; otherwise equipment
damage will result.
8) On panels equipped with a ground busbar, reconnect the load return or battery
return wiring to the ground busbar.
9) Reconnect the load or battery wiring to the circuit breaker or fuse positions.
10) Transfer the plug-in circuit breakers or fuses from the old panel to the
replacement panel.
11) Replace the plastic shield covering the circuit breakers or fuseholders on the
replacement panel.
12) Verify no Circuit Breaker/Fuse Alarms are active.
13) Close the distribution cabinet’s front door. Turn the latch clockwise to secure the
door.