3-10
Issue 9 October 1998
363-206-204
Equipment and Front Access Cable Installation
NOTE
:
When installing the fan shelf between two DDM-2000 OC-3 shelves, the
filler bar attached at the top of the fan shelf front cover must be removed to
provide clearance for the fiber tray on the DDM-2000 OC-3 shelf located
above the fan shelf. The filler bar is secured by two screws located on the
inside of the fan shelf’s front cover (the front cover should be removed by
turning the two locking screws).
1. Verify that the set point of the fan shelf is provisioned for 400 fpm (feet per
minute) (positions 1, 3 and 4 of the 4-position switch should be ON and
position should be OFF).
NOTE
:
If the bay includes a DDM-2000 OC-12 shelf (Figure 3-5), the fan shelf set
point for the fan shelf located above the DDM-2000 OC-12 shelf must be
set for 400 fpm (switch positions 1,3 and 4 to ON and position 2 to OFF).
2. Connect and route power, alarm, and grounding cabling associated with
the fan shelf for front access configuration as follows:
a. Unscrew the fan shelf front faceplate by removing its five mounting
screws.
b. Remove the four fan packs starting with the middle two first.
c. Remove the 2-inch diameter cap plugged into the dumbbell-shaped
cutouts at the rear and right side of the shelf. Route the unconnec-
torized ends of a G377 fan shelf power cable and the grounding
cable, provided with the fan shelf, into the shelf through the cutouts
on the right side of the shelf and out of the shelf through the rear cut-
out.
d. Connect the grounding cable to the ground stud located on the left
side of the rear of the shelf.
e. Cut the cable ties, which secure the alarm cable running through the
rear of the shelf, and redress the cable through the cutout on the
right side of the shelf. Secure it with the cable ties provided with the
shelf.
f. Prepare the ends of the wires on the cable assembly and insert
them into the terminal strip on the rear of the fan shelf as follows:
Terminal Designation Wire Color
-48 V Red
RTN Black
-48 V Green
RTN White
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