Dell PowerEdge R420xr Dell PowerEdge R420xr Owners Manual - Page 9

Environmental NOTE: This section defines the limits to help avoid IT equipment damage and/or failure from particulates and gaseous contamination. If it is determined that levels of particulates or gaseous pollution are beyond the limits specified below and are the reason for the damage and/or failures to your equipment, it may be necessary for you to re-mediate the environmental conditions that are causing the damage and/or failures. Re-mediation of environmental conditions will be the responsibility of the customer. Air Filtration Data center air filtration as defined by ISO Class NOTE: Applies to data center environments only. Air filtration requirements do not apply 8 per ISO 14644-1 with a 95% upper confidence limit. to IT equipment designed to be used outside NOTE: Air entering the data center must a data center, in environments such as an have MERV11 or MERV13 filtration. office or factory floor. Conductive Dust NOTE: Applies to data center and non-data center environments. Air must be free of conductive dust, zinc whiskers, or other conductive particles. Corrosive Dust NOTE: Applies to data center and non-data center environments. • Air must be free of corrosive dust. • Residual dust present in the air must have a deliquescent point less than 60% relative humidity. Gaseous Contamination NOTE: Maximum corrosive contaminant levels measured at ≤50% relative humidity. Copper Coupon Corrosion Rate Silver Coupon Corrosion Rate