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Figure 1. UPS Battery Shelf Configuration
1
2
3
4
Once the unit is off and you have removed the AC plug, DC fuse and unit cover, you must then
remove the white
B+
wire from the far upper left battery (as viewed above). Figure 1 shows the
battery configuration for a 4 battery UPS. If you have an 8 battery UPS, there will be 4 batteries on
each shelf. If you have a 2 battery UPS, proceed directly to figure 2.
To remove the bracket holding the upper batteries,
1) Remove the 8-32 hex nut on the right side of the bracket (below the inductor coil).
2) Pull up on the right side of this bracket in order to release its tab (located on the left side)
which is inserted in the slot of the bracket below. Then slide the batteries to the right so that
the bracket handle will clear the case. Set the bracket, coil and wires aside.
3) Next remove the
BC
wire on the far right side of the top shelf batteries. (This is the wire
coming from the left-most terminal on the batteries on the lower shelf.
BE CAREFUL TO
ISOLATE THE LOWER SHELF BC WIRE, BECAUSE THIS IS THE SAME AS THE
CHASSIS.
To touch the chassis (or elsewhere) could short the lower shelf batteries.
4) Detach the wires connecting the top shelf batteries in series. The top shelf batteries are now
ready for removal and/or replacement.