Installing A Cooling Unit Into A Multiservice Switch 7460 - Nortel 7400 Hardware Installation

Installing a cooling unit into a Multiservice Switch 7460

Prerequisites
Procedure steps
Multiservice Switch 7400 Hardware Installation, Maintenance, and Upgrade 6.1S2
Install the cooling unit of an Nortel Networks Multiservice Switch 7460 to
provide optimum airflow for the heat from the processor cards and power
supplies.
• The shelf assembly of an Multiservice Switch 7460 with PEC NTEP80
must already be installed.
• You need an Multiservice Switch 7460 cooling unit with PEC
NTEP8023. The air filter is already installed in the unit.
• Ensure that the rack or cabinet is installed and grounded.
• Follow "Avoiding damage from static electricity" (page 208) to protect
the unit from damage by ESD or from transferring ESD to other
hardware.
1 Hold the cooling unit so that:
• the cooling unit faceplate faces you
• the faceplate airflow grill is on the right-hand side of the front of the
faceplate
• your right hand is holding the handle located beside the upper airflow
grill
• your left hand is supporting the underside of the cooling unit
Refer to the figure "The cooling unit of a Multiservice Switch 7460 with its
air filter" (page 258).
2 Gently insert the cooling unit into the front, right-hand side of the device
as shown in the figure "Exploded view of the cooling unit and a
Multiservice Switch 7460" (page 259). Stop pushing when the captive
screws at the faceplate of the cooling unit contact their threaded holes.
3 Hand-tighten the 2 Phillips captive thumb screws to snug plus a 1/4 turn.
Do not overtighten.
Chapter 39 Hardware procedures 257