Nortel Passport 7400, Hardware Installation, Maintenance, And Troubleshooting, Page: 220 / 438

220 Chapter 37 Hardware procedures
241-7401-240 5.2S1
Installing a 16-slot Passport switch cooling unit
Install a 16-slot Passport switch cooling unit no more than ten minutes after
removing a cooling unit.
Prerequisites
• You will need a cooling unit with PEC NTBP07AA.
Procedure steps
1 Use the faceplate handle to carefully lift the cooling unit with one hand.
2 Push on the bottom of the cooling unit with your other hand to rotate it to
a horizontal position.
Support the weight of the cooling unit with one hand and grasp the
faceplate handle with the other hand. See the figure “Installing a cooling
unit” (page 221).
3 Insert the cooling unit into the cooling unit chassis at a 45-degree angle.
Do not force it. Then, tilt the front of the unit down to an horizontal position.
4 Press on the cooling unit faceplate until it is inserted more than halfway
into its slot. Release the handle. Then, press on the faceplate until you
feel the connectors at the rear of the cooling unit engage. The faceplate
handle snaps up into a vertical position when the cooling unit is fully
engaged.
5 Lock the cooling unit. Use a 1/4-in. slot-head screwdriver to turn the
handle locking screw 1/4 turn clockwise. See the figure “16-slot Passport
switch cooling unit lock” (page 351).