Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 505 / 874

Chapter 17 Hardware procedures 505
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade 5.2S2
Installing a shelf assembly onto adapter brackets
Install the shelf assembly onto the adapter brackets to place the
Passport 15000 or 20000 into a 23-inch EIA rack or cabinet.
Prerequisites
• You must be familiar with “Safety considerations and best practices”
(page 53)
• You need one of these shelf assembly kits:
— NTQS04 for a Passport 15000
— NTQH04 for a Passport 20000
• You need two helpers to prevent the shelf assembly from falling while it
is being fastened. An empty shelf assembly weighs 99 kg (218 lbs).
Procedure steps
1 While facing the front of the rack, insert the shelf between the adapter
brackets and above the cooling unit.
2 Gently lower the shelf until the bottom edge of its mounting ears touch the
top edge of the cooling unit mounting ears. Prevent the weight of the shelf
from resting on the unit.
If you use a pair of the eye holes that allows threading 2 screws before
placing the shelf assembly against the uprights, and then passing the
mounting ears over the screws to hang there until other screws are
fastened, you must use only the top two, thread at least 4/5s of each
screw into the upright, and hang on both screws simultaneously.
Otherwise the weight of the assembly can bend the mounting ear.
3 Align the screw holes on the 2 mounting ears with the nearest holes on
the outside face of the adapter brackets.
CAUTION
Risk of equipment damage and service loss by bent
pins
While handling a shelf assembly or working near it, ensure
that nothing contacts the backplane pins inside the shelf
assembly. Contacting a pin with a sideways force can
easily bend it, thereby rendering the card slot unusable.