Cisco 7000 Series Replacement Instructions Manual page 13

Cisco 7000 Air Filter and Chassis Blower Replacement Instructions 13
Caution:
Operate the system only if the blower is installed and functioning properly.
The blower prevents an overtemperature condition that can result in severe equipment
damage.
Installing a New Blower
Install the new chassis blower as follows:
Step 1:
Ensure that the power supplies are still turned OFF.
Warning:
Before accessing the chassis interior, turn the system power OFF and
unplug the power cord. Use extreme caution when working near the backplane; high
voltage is present when the system is operating.
Step 2:
Note the orientation of the two air ducts on the back of the new blower and
the two cutouts in the backplane. The two ducts fit snugly into the backplane
cutouts.
Step 3:
Hold the blower with the two air ducts facing away from you, and the three
captive screws along the bottom of the side facing you (in the orientation
shown in Figure 1). Lay the connector and wiring on top of the blower to
keep it out of the way while you install the blower.
Step 4:
Place the blower into the front chassis cavity so it rests on the floor of the
chassis, then lift the blower up slightly and align the air ducts with the
backplane cutouts.
Step 5:
Push the air ducts into the cutouts. If necessary, wiggle the blower slightly as
you are pushing it inward (the ducts fit snugly into the cutouts) until the edges
of the blower meet the backplane.
Step 6:
Use the T-handle driver or screwdriver to turn each of the captive screws
clockwise about two full turns to ensure that they are aligned in the backplane
holes. You should not feel much resistance. If a screw is hard to turn, do not
force it. Wiggle the blower around, ensure that the screw is straight, and try
tightening the screw again. If after several attempts the screw does not tighten
easily, refer to the following section, "Checking the Installation" for further
instructions.
Step 7:
Tighten each of the three captive screws by turning them clockwise. Use the
same alignment hole in the chassis to guide the driver to the far left screw.
Step 8:
Locate the blower power connector port (see Figure 8), which is under the
white power bar on the backplane. Both the port and the connector are keyed
so the notched or flat edge of the connector is at the bottom.
Step 9:
Hold the blower power connector with the flat edge down and the red or
purple (+24V) wire to the left, and plug the connector into the backplane
connector. When the connector is fully inserted, two plastic tabs snap
outward to secure the connector in place.
Step 10:
Replace the top and bottom front chassis panels (refer to "Removing and
Replacing the Front Chassis Panels" on page 6) and proceed to the next
section to verify the installation.