Application Guide

Table Of Contents
Section 5877 User Instructions
Issue AQ, January 15, 2013 Spec. No. 582140000 (Models 802NLDB, 802NLEB and 802NL-B)
Page 6-22 Chapter 6. System Troubleshooting and Repair
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Alarm, Reference, and Control Fuse Replacement
If an alarm, reference, or control fuse opens; replace with the same type and rating, or
equivalent. Refer to SAG582140000 for fuse replacement part numbers. Refer to Figure
6-7 and Figure 6-8 for alarm, reference, and control fuse locations.
Rectifier: The input of each Rectifier contains double pole/neutral fusing. This fusing is
not customer replaceable. If a fuse opens, replace the entire Rectifier. An open fuse
causes the Rectifiers Rectifier fail alarm circuit to activate. The input fuses have higher
amperage ratings than the recommended external branch circuit protection.
Distribution Fuses: If a distribution fuse opens, the associated alarm-type fuse opens
to activate the fuse alarm circuit. Replace the distribution fuse before replacing the
alarm-type fuse.
Safety Fuse Covers: Safety fuse covers are provided for all alarm-type fuses installed
in the system. These covers snap onto the fuses and provide protection from exposed
electrical terminations when a fuse opens. Insure that the safety fuse cover is installed
after replacing a fuse. Refer to Figure 6-6 for installation details. Note that there are
different types of safety fuse covers for the different brand alarm-type fuses.
Figure 6-6
Installation of Safety Fuse Covers
Safety Fuse Cover
P/N 248898600
(SAN-O SAX-1)
Safety Fuse Cover
P/N 248898700
(BUSSMANN GMT-X)
Safety Fuse Cover
P/N 102774
(BUSSMANN GMT-Y)