The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
Consider the following issues when planning your installation site for the Cisco R-Series Rack:
– Unloading the unit from the vehicle in which it is shipped
– Using a forklift or similar device to move the unit to an unpacking site
– Moving the unpacked unit to the installation site
Imperfections or obstructions in the floor between the unloading and installation site might hamper the movement of the unit. If you encounter an obstacle such as a sill or carpet, exercise care in navigating over it.
You may need the following tools and equipment to install the Cisco R-Series Rack:
To prepare your site for installation of the Cisco R-Series Rack you may need to reinforce the floor to support the Cisco R-Series Rack when fully loaded with equipment. Refer to Figure 2-1 to assure that the reinforcement will have secure anchoring for the rack.
Figure 2-1 Anchoring Pattern for the Cisco R-Series Rack
Note It is your responsibility to fulfill local seismic safety standards.
Figure 2-2 shows the dimensions and space requirements for the Cisco R-Series Rack.
Plan for at least 3 feet of clearance in front of the Cisco R-Series Rack to install servers or networking equipment. Refer to the documentation for the equipment you plan to use to find out how much clearance is needed at the rear for ventilation or other uses.
The following guidelines will help to ensure your safety and protect the equipment. This list does not cover all potentially hazardous situations, so be alert.
Note Before you install the system, make sure that your site is properly prepared so you can avoid having to move the Cisco R-Series Rack later. Specifically, choose your installation site to accommodate existing power sources and network connections.
Whenever you move the Cisco R-Series Rack or any heavy object, follow these guidelines:
Figure 2-3 Unsafe Lifting Practices
Most networking and data center devices are designed to be removed and replaced without presenting an electrical hazard or damage. Refer to the documentation for individual components for the few procedures that require completely removing power to a component, but in those situations you should always remove the plug on the component side first, and unplug all components connected to a PDU before unplugging a PDU.
Follow these basic guidelines when working with any electrical equipment:
In addition, use the following guidelines when working with any equipment that is disconnected from a power source, but still connected to network cabling.
Warning Connect the device to a grounded power outlet. Statement 25
Warning For Nordic countries (Norway, Finland, Sweden and Denmark) this system must be installed in a Restricted Access Location, where the voltage of the main ground connection of all equipment is the same (equipotential earth) and the system is connected to a grounded electrical outlet. Statement 328
Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. Statement 1001
Warning Read the installation instructions before connecting the system to the power source. Statement 1004
Warning This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than: 30 A in the US and Canada and 32 A International. Statement 1005
Warning This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available. Statement 1024
Electronic components are sensitive to Electrostatic discharge (ESD). ESD precautions should always be taken when handling electronic components. Electrostatic discharge (ESD) damage occurs when electronic cards or components are improperly handled and can result in complete or intermittent system failures. Use an antistatic strap whenever handling electronic components. carrier edges only; never touch the boards or connector pins.
Note Always tighten the captive installation screws when present. These screws prevent accidental removal, provide proper grounding for the system, and help ensure that the bus connectors are properly seated.
Following are guidelines for preventing ESD damage:
Note For safety, periodically check the resistance value of the antistatic strap. The measurement should be between 1 and 10 megaohms (Mohms).
When setting up the plant wiring and cabling at the site of the new system, consider the distance limitations imposed by power cable lengths and connector compatibility.
When planning your rack installation, consider the following guidelines:
The Cisco R-Series Rack and PDUs are operable well beyond the specifications of the servers or networking equipment you are likely to install in them. Refer to the user documentation of the devices you will install to determine the required environment for those devices.
Cisco PDU specifications are in Table 2-1 :
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Most compute and networking equipment is designed to operate within the conditions as specified by The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE).
ASHRAE has published a common set of guidelines for equipment manufacturers and data center designers to standardize on the following issues relating to a data center site:
These guidelines were developed by an industry consortium as part of the ASHRAE Technical Committee 9.9 and are presented in the 2004 report Thermal Guidelines for Data Processing Environment. These guidelines were updated in 2008 by the ASHRAE Environmental Guidelines for Datacom Equipment.
For information about ASHRAE and the report, refer to the ASHRAE website ( http://www.ashrae.org ).
Exhaust fans cool power supplies and system fan trays cool equipment by drawing in air and exhausting air out through various openings in the chassis. However, fans also ingest dust and other particles, causing contaminant buildup in the equipment and increased internal chassis temperature. A clean operating environment can greatly reduce the negative effects of dust and other particles, which act as insulators and interfere with the mechanical components in the equipment.
The corrosion of equipment connectors is a gradual process that can eventually lead to intermittent failures of electrical circuits. The oil from your fingers or prolonged exposure to high temperature or humidity can corrode the gold-plated edge connectors and pin connectors on various components in the equipment. To prevent corrosion, avoid touching contacts on modules and protect the equipment from extreme temperatures and moist, salty environments.
To reduce the possibility of EMI and RFI, follow these guidelines:
Note To predict and prevent strong EMI, you might need to consult experts in radio frequency interference (RFI).
Electronic equipment is sensitive to variations in voltage supplied by the AC-power source. Over-voltage, under voltage, and transients (or spikes) can erase data from the memory or cause components to fail. To protect against these types of problems, you should always make sure that the racks that hold the servers or networking devices are grounded. When the racks are grounded, the equipment installed in them are automatically grounded. Refer to the instructions specific to the products you install in the rack for grounding steps.
You should use dedicated power circuits (rather than sharing circuits with other heavy electrical equipment) for each PDU you install in the Cisco R-Series Rack. The circuits must be rated for 30 A or 32 A, 200 to 250 VAC. The receptacles for these circuits should be within 6 feet (1.8 m) of each PDU unit when it is installed in the Cisco R-Series Rack. Check the power at your site before installation and periodically after installation to ensure that you are receiving clean power. Install a power conditioner if necessary.
Refer to the documentation for the devices you plan to install in the Cisco R-Series Rack.
Planning the location and layout of your equipment rack or wiring closet is essential for successful network operation, ventilation, and accessibility. Table 2-2 lists the site planning tasks that we recommend completing before installing a Cisco R-Series Rack or PDU.
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EMI3 evaluation:
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1.Verify that the power supply installed in the chassis has a dedicated AC source circuit. |