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COMSPHERE –48 Vdc Central Office Power Unit
2-20 May 1998 3000-A2-GB41-40
Air Filter and Brackets
Installation (Optional)
The air filter (part number 3000-F1-020) prevents dust
from entering the carrier. It is an optional component and
must be ordered separately. However, the air filter
brackets and screws are supplied with the CO Power Unit.
Only the 3000-F1-020 air filter may be used. Under
normal environmental conditions, you should inspect
and/or replace the 3000-F1-020 air filter every three
months.
This section describes the procedure for installing the
air filter and brackets. This procedure must be performed
before installing the carrier into the cabinet.
NOTE
If the carriers in the cabinet are
stacked directly on top of each
other, then only the bottom
carrier in the cabinet needs an
air filter.
Keep in mind that the air filter brackets take up an
additional 0.6 inches (1.5 cm) in height and if mounted on
one of the carriers in the COMSPHERE 72-inch cabinet
(4000-B2-201), then only five carriers can be installed in
the cabinet instead of the usual six.
To install the air filter and brackets:
" Procedure
1. Raise the carrier 0.6 inches from the bottom of the
cabinet (or above the carrier below it).
2. Fasten the two identical brackets to the bottom of
the CO power tray using the four #6 Phillips-head
screws provided. See Figure 2-11.
3. Place the air filter with the grill-side face up on
the guides of the brackets and slide the air filter in
place.
If you were directed to this section during the CO
Power Unit Installation procedure, then return to that
procedure now.