22 Chassis installation fundamentalsCAUTIONRisk of equipment damageNortel does not support 8001AC and 8002DC power supplies withR modules. R modules installed in the 8006, 8010, or 8010cochassis require the 8004AC, 8004DC, 8005AC, or 8005DC powersupplies.CAUTIONRisk of equipment damageThe 8004 and 8005 power supplies use different power ratings.Nortel recommends that you do not operate the Nortel EthernetRouting Switch 8600 chassis with a mix of power supply models(8004 and 8005).If you upgrade the Nortel Ethernet Routing Switch 8600 and use aredundant power configuration, you can hot swap the 8004 powersupply with the 8005 power supply while the Nortel EthernetRouting Switch 8600 remains in operation. Do not operate thechassis with a mix of power supply models for an extended periodof time.Upgrade the power supplies before you upgrade the modules.For information about power supply installation, see Installing an AC PowerSupply in an Ethernet Routing Switch 8000 Series Chassis (NN46205-306;312751-E) or Installing a DC Power Supply in an Ethernet Routing Switch8000 Series Chassis (NN46205-307; 313070-E). The 8006 chassis usestwo fan trays for cooling, see Installing a Fan Tray in an Ethernet RoutingSwitch 8000 Series Chassis (312752-E).Figure 3 "8006 chassis and components" (page 23) shows the location ofcustomer-replaceable components in the 8006 chassis.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.