Nortel DMS-100 Series Maintenance Manual page 658

13-56 OPM routine maintenance procedures
Filter replacement
OPM
(end)
Filter replacement OPM
At the OPM cabinet
1
2
3
Polyester
filter media
Air flow
direction
4
5
6
7
8
297-8361-550 Standard 04.01 September 2000
Remove the filter insulation strip and sleeve filter assembly.
Pull the dirty sleeve filter media from the sleeve filter support frame and
discard.
Slip the sleeve filter support frame into the sleeve filter media roll, A0336991,
and cut the material as shown here.
Back-up
sheet
With the back-up sheet facing you, fold the left and right margins at the lower
corners toward you. Fold the back-up sheet around the frame.
Fold the bottom margin over the frame and insert the sleeve filter assembly
into the guide rails.
Push down until the top is level with the opening.
Replace the filter insulation strip and sleeve filter assembly.
The procedure is complete.
67.31 cm(26.5 in.)
Approx.
59.69 cm (23.50 in.)
Ref.
1.5 in.
typical
Sleeve
filter
PO688296
Support frame
PO688297