260 Chapter 39 Hardware procedures
NN10600-175 6.1S2
Installing a cooling unit into a Multiservice Switch 7480
Install a new cooling unit into a Nortel Networks Multiservice Switch 7480
no more than ten minutes after removing a cooling unit.
Prerequisites
• You need a cooling unit with PEC NTBP07.
•Follow “Avoiding damage from static electricity” (page 208) to protect
the unit from damage by ESD or from transferring ESD to other
hardware.
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 261).
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
“Cooling unit lock
on a Multiservice Switch 7480” (page 462).
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