Nortel SONET AccessNode 800A Series Manual page 355

Procedure 12-17
Replacing the fan filters in the heat exchanger roof
This procedure explains how to replace the intake and exhaust fan filters in the
Series 800A cabinet with the NT7A69 heat exchanger roof options.
Tools required
A can wrench (216 tool) with Harris insert part number 10660-001
(tool and insert shipped inside the cabinet), is required.
Materials required
A NT7A6920 fan filter replacement kit is required.
Action
Step
1
2
3
4
5
6
7
AccessNode Series 800A Outside Plant Cabinet Installation 323-3001-210 Issue 1.0
Action
Remove the filter retaining bracket on the underside of the rain louvers by
loosening the 2 1/4 turn fasteners (see Figure 12-22 on page 12-64).
Place the filter retaining bracket in a safe place.
Remove the filter by pulling down on the two filter removing straps.
Inspect the filter. If possible tap the filter on the ground or rinse with water to
remove any dirt or insects.
If filter cannot be reasonably cleaned, then replace with new filter.
Note: Make sure the new filter removing straps are oriented properly at the
bottom of the filter before installing.
Replace the filter retaining bracket.
Repeat step 1 through step 6 for each of the remaining 3 filters.
—continued—
Cabinet maintenance operations 12-63