Nortel DMS-100 Series Maintenance Manual page 695

Fan filter replacement, air induction roof
At the OPAC site
1 Open all four cabinet doors.
2 To turn off the fans, remove fan fuses F1 – F4 in slot 8 and F1 – F6 in slot 9 of
the MSP.
3 Open both filter covers.
Filter material
Filter cover
Cross-section of air induction roof with filter
4
Remove and discard both old fan filters.
5
Use only Nortel replacement filters to ensure the environmental
properties of the OPAC cabinet system. Order and use the correct
air filter kit, part number
Install new fan filters and close hinged filter covers. Make sure both filters sit
against the complete length of the grate. Wrong installation allows air to
bypass the filter.
6 To turn on the fans, replace fan fuses F1 – F4 in slot 8 and F1 – F6 in slot 9 of
the MSP.
7 Make sure air flows into the cabinet through the rain louver intake and out of the
cabinet through the rain louver exhaust.
8 The procedure is complete.
Routine maintenance procedures 13-47
Fan filter replacement, air induction roof Fan filter replacement, air induction roof
ATTENTION
A0391171
DMS-100 Family OPAC Maintenance Manual XPM12 and up
OPAC
Fan
.
OPAC
(continued) (end)