26 Chassis installation fundamentalsChassis Fan tray8010 Two fan trays—each fan tray uses eight high-capacity fans8006 One fan tray with six high-capacity fans8003 One fan tray with three high-capacity fansA control or monitor circuit board in the fan tray reports temperature and thestatus of fan operation to the network management software. A green lightemitting diode (LED) indicates correct fan operation.For fan installation instructions, see Installing a Fan Tray in an EthernetRouting Switch 8000 Series Chassis (312752-E).Site requirementsEnsure that the installation site meets the space, electrical, andenvironmental requirements listed in this section. See "Technicalspecifications" (page 85) for more information.8010, 8006, and 8003 chassisThe following sections include the site requirements for the 8010, 8006,and 8003 chassis.Space requirementsThe installation site must provide sufficient free space around the chassisto ensure proper ventilation and service access.Use the following guidelines to plan front and rear access:• The maintenance aisle in front of the frame requires a clearance of76.2 cm (30 inches).• The wiring aisle at the back of the frame requires a clearance of 61 cm(24 inches).AC input electrical requirementsFor information about specifications for the power supply, see "Technicalspecifications" (page 85).For AC input power specifications for each of the modules, see Installingan AC Power Supply in an Ethernet Routing Switch 8000 Series Chassis(NN46205-306; 312751-E).DC input electrical requirements (8010 and 8006 chassis)The installation site must meet the electrical requirements for DC power asshown in Table 2 "Electrical requirements for the DC models" (page 27). Foradditional electrical requirements, see "Technical specifications" (page 85).Nortel Ethernet Routing Switch 8600Installing and Maintaining the Ethernet Routing Switch 8000 Series ChassisNN46205-303 01.02 Standard4.1 10 January 2008Copyright © 2008, Nortel Networks.