Step 7. Are All of the Internal Options Installed?These instructions are for systems that have internal options (such as adapters, diskdrives, or memory upgrades) already installed.If you have internal options that are not installed, install them now. Refer to Chapter 3,“Installing Options in Your System” on page 33, and then return here.Step 8. Position the System Unit and DisplayPosition the system unit and display (optional) at or near their installed location.Observe the following guidelines when you are positioning the system unit:v The system unit weighs between 34 kg (75 pounds) and 41 kg (90 pounds). Do nottry to lift the system unit by yourself.v Displays or ASCII terminals can weigh as much as 35 kg (77 pounds). Use cautionwhen lifting or moving the display or ASCII terminal.v Leave enough space around the system unit to safely and easily complete the setupprocedures.v Observe standard ergonomic guidelines while arranging your system unit so that youcan work comfortably and safely. For more information on arranging your workstation,visit the Healthy Computing Web address at:http://www.pc.ibm.com/us/healthycomputing.v Be sure to maintain at least 51 mm (2 inches) of space on the sides of the systemunit and 152 mm (6 inches) at the rear of the system unit to allow the system unit tocool properly. The front of the system requires a minimum of 76 mm (3 inches) ofspace. Blocking the air vents can cause overheating, which might result in amalfunction or permanent damage to the system unit.v Place the system unit in a location where it can safely and easily reach anynecessary power outlets and network connections.v Place the display or ASCII terminal in a stable and sturdy location.12 Installation Guide