DEC Rackmount 7000 AXP Installation And Owner's Manual page 37

To install the slides, perform the steps in the following procedure:
1. Check each slide for any damage and for smooth operation.
2. Loosen the two screws that secure the rear slide bracket to the slide so that it
can be adjusted to fit between the front and central rails.
3. Identify the LSB chassis location in the rack and establish a datum line. The
datum line serves as a reference to identify the mounting hole positions for
the slide brackets and U-nuts. To establish a datum line:
a. Determine the area of the rack where the LSB chassis will be installed.
The LSB chassis is normally installed in the bottom space of an
equipment cabinet and requires 48.9 cm (19.25 in.) of height, or 33
contiguous holes (35 holes on the left rail with overlap into the XMI
space).
b. Refer to Figure 2–3 and establish a datum line at the base of the area
between two holes with 1.3 cm (.5 in.) spacing. The first hole above the
datum line is identified as hole 1. This establishes the location of the
bottom edge of the LSB chassis.
4. Install the slides between the front and central vertical mounting rails from
the front of the cabinet as follows:
a. Determine the proper mounting holes for the slide brackets using the
four-hole pattern in the bar nut. This pattern repeats every 4.45 cm (1.75
in.) along the rails. The proper four-hole pattern for the right slide on
the front and central rails is the 2nd, 3rd, 4th, and 5th holes up from the
datum line (see Figure 2–3).
The proper four-hole pattern for the left slide on the front and central
rails is the 32nd, 33rd, 34th, and 35th holes up from the datum line (see
Figure 2–3).
b. Position a bar nut for each slide bracket in the correct position on the
inside of the front and central RETMA rails and start the two middle
screws (the 3rd and 4th holes up from the datum line for the right slide
and the 33rd and 34th holes up from the datum line for the left slide),
then slide the front and back slide support bracket on the inside of the
rails between the bar nut and the rail (see Figure 2–4).
Installation
Installation 2–7