Alcatel-Lucent 7750 SR-a4, Руководство по установке, Страница: 79 / 232

Installing the 7750 SR-a Chassis
7750 SR-a4 and SR-a8 Installation Guide 79
• a torque driver for the rack screws. Refer to the rack manufacturer’s documentation
for instructions.
To install the chassis horizontally in the 19-in. (482.6 mm) EIA-310 rack:
Step 1. Install screws in the rack rail in the bottom-most hole of the allocated U space to
support the chassis temporarily during installation. Make sure that the screws are
installed at least half way into the hole. Do not tighten the screw. (Key 2 in
Figure 17 and Figure 18 ).
Step 2. With at least two people and, if necessary, using an equipment lift, position the
chassis in front of the rack.
Step 3. Lift the chassis from the bottom and position it in the rack, resting the bottom of the
rack-mounting flange (Key 3 in
Figure 17 and Figure 18 ) on the temporary screws
(Key 2 in Figure 17 and Figure 18 ).
Step 4. Align the mounting holes on each bracket with the mounting holes on the rack rail.
Step 5. Insert a screw into each mounting hole. Do not skip any holes. Do not tighten the
screws fully.
Step 6. Align the chassis in the rack, if required.
Step 7. Tighten all screws. Refer to the rack manufacturer’s documentation for
instructions. See
Torque Specifications for Rack Mounting on page 59 for more
information.
Step 8. Ground the chassis to the building ground. See Chassis Ground Wiring on page 85 .
ETSI 600-mm x 300mm Rack
The accessory box that is shipped with the chassis contains rack mounting brackets that adapt
the 535-mm wide mounting aperture of the ETSI rack to the width of the mounting flanges
of the 7750 SR-a chassis. The inner part of the ETSI rack adapter bracket emulates the
universal spacing of the EIA-310 rack. The outer part of the ETSI rack adapter bracket
attaches to the ETSI rack rail.
The horizontally mounted 7750 SR-a4 occupies 9 ETSI RUs. The horizontally mounted
7750 SR-a8 occupies 13 ETSI RUs.
Note: The oval-shaped holes in the mounting flanges enable you to adjust the alignment of
the chassis during installation before you tighten the screws.