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5 Troubleshooting Appendix A: Acer Altos R520 rack installation guide This appendix shows you how to set up the Acer Altos R520 server in a rack mount configuration. Setting up the system rack Important! Observe the electrostatic discharge (ESD) precautions indicated on page 39 when perfoming the following procedures. Do not attempt the procedures described in the following sections unless you are a qualified technician. Equipment rack precautions Follow the rack manufacturer's safety and installation instructions for proper rack installation. The following additional rack safety installation measures should be considered: • Anchor the equipment rack The equipment rack must be anchored to an unmovable suitable support to prevent the rack from falling over when one or more systems are fully extended out of the rack assembly. You must also consider the weight of any other devices installed in the rack assembly. The equipment rack must be installed according to the manufacturer's instructions. • Main AC power disconnect You are responsible for installing an AC power disconnect for the entire rack unit. This main disconnect must be readily accessible, and it must be labeled as controlling power to the entire unit, not just to the system(s). • Earth ground the rack installation To avoid the potential for an electrical shock hazard, the rack assembly itself must be suitably earth grounded, according to your local regional electrical codes. This typically will require the rack to have its own separate earth ground. We recommend you consult your local approved electrician. Appendix A: Acer Altos R520 rack installation guide • Elevated operating ambient temperature The maximum operating temperature of the system is 35 °C (95°F). Careful consideration should be given to installing the system in an environment compatible with the 35 °C (95°F) maximum ambient temperature. • Reduced airflow The amount of airflow required for the safe operation of the equipment should not be compromised when installing the system in a rack. • Mechanical loading Exercise care when mounting the system in a rack to avoid any accidents. • Circuit overloading Appropriate consideration should be given when connecting the supply circuit to the system to avoid any circuit overload. The system name plate rating should be used when addressing concerns about circuit overload. 153 System rack installation The Acer Altos R520 server should be mounted into a rack. A tool-less rack rail and CMA (cable management arm) kit is available for installing system to a rack cabinet. The figure below shows the server in a rack-mount position. Appendix A: Acer Altos R520 rack installation guide Vertical mounting hole pattern The four vertical rails of the system rack contain mounting holes arranged in a manner shown in the figure below: The system occupies 1U in the rack. Count the U positions and hole numbers from the bottom up. The distance from the center of two holes with closer spacing to the center of the next pair is equivalent to 1U. Note: The unit of measurement used in this guide is "U" (1U = 1.75 inches or 44.45 mm). The total sum of the heights of all components in the rack measured in "U" cannot exceed the height of the rack. For more information, refer to the documentation that came with the system rack. When installing components, you must start your measurement from the center of the two holes with closer spacing. Otherwise, the screw holes on the component may not match those on the rack. Installing the system into the rack Caution! To minimize the chances of injuries, make sure that two or more people help in installing the server. To install the system into a four-post rack Remove the inner rails from the mounting rails. (1) Extend the inner rail from the mounting rail until the rail release latch clicks. (2) Depress the release latch (A) and slip the inner rail out (B). 156 Appendix A: Acer Altos R520 rack installation guide (3) Do the same thing to the other mounting rail. Caution! To avoid personal injury, care should be taken when pressing the inner rail release latches and sliding the component into the rack. 2 Attach the inner rails to both sides of the server. Align the screw holes of the inner rail to the server screws (A), then slide rails to the left until the rails lock into place with an audible click (B). 157 3 Install the mounting rails to the rack posts. (1) Determine the vertical position in the rack. Refer to “Vertical mounting hole pattern” on page 154 for more information. (2) Align and insert the mounting rails into the rack posts’ mounting holes (A). (3) Make certain the proper mounting holes on rack post are selected. (4) Use two metal screws supplied with the kit to secure the front and rear mounting rail to the rack (B). (5) Do the same thing to the other mounting rail. Appendix A: Acer Altos R520 rack installation guide (6) Fully extend the mounting rails on the rack. 159 4 Install the server into the rack. Caution! To ...