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C3646M-C (6/09) 19
To replace a fan, refer to Figure 15 and perform the following steps:
1. Unplug the unit to turn the power off.
2. Loosen the four thumb screws located on the front panel cover (refer to Figure 16). Pull the front panel away from the chassis, and then let
it hang from the front panel brackets.
Figure 16. Remove Front Panel (32-channel model shown)
3. Unscrew the two, black 4-40 x 0.25-inch Phillips flat head screws that secure the front panel to the front panel bracket.
4. Unscrew the two, black 4-40 x 0.25-inch Phillips flat head screws that secure the fan guard to the front panel. Remove the fan guard and filter.
5. Unscrew the two, black 4-40 x 1.187-inch Phillips flat head screws that secure the inner fan grill, fan assembly, and fan mount to the
front panel.
6. Remove the installed fan assembly. Disconnect the fan wire assembly from the connector located inside the unit.
7. Install the new fan, reconnect the fan wire assembly, and then reinstall the fan mount and inner fan grill. Secure with the two, black
4-40 x 1.187-inch Phillips flat head screws
8. Reattach the front panel to the unit. Replace the filter and reinstall the fan guard with two, black 4-40 x 0.25-inch Phillips flat head screws.