Nortel DMS-100 Series Maintenance Manual page 693

Application
Use this procedure to replace Outside Plant Access Cabinet (OPAC) fan
filters in the air induction roof.
Interval
Perform this procedure as often as every two months, but at least every six
months. The frequency of this procedure depends on cabinet location and
conditions.
The following table contains an example of a filter replacement schedule.
Filter replacement schedule
Ambient
temperature C
Cool
(under 10 )
Warm
(over 10 avg)
Note: Columns 2, 3, and 4 represent dust density of environment.
Common procedures
There are no common procedures.
Action
This procedure contains a summary flowchart as an overview of the
procedure. Follow the specific steps to perform this procedure.
Fan filter replacement, air induction roof
Note: Monitor the filters at each OPAC site to determine the rate
particles charge filters. You can create a filter maintenance schedule
from this study. Turn the fans off before you remove the filters.
.0003 average
residential
(see note)
4 months
2 months
DMS-100 Family OPAC Maintenance Manual XPM12 and up
13-45 Routine maintenance procedures
.0008 average
industrial
(see note)
1.5 months
1 month
13-45 13-45
OPAC
.003 g/m heavy
industrial
(see note)
2 weeks
1 week