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Installation Warnings and Guidelines

Warning

To prevent the system from overheating, do not operate it in an area that exceeds the maximum

recommended ambient temperature of: 35° C (95° F).

Statement 1047

Warning

The plug-socket combination must be accessible at all times, because it serves as the main

disconnecting device.

Statement 1019

Warning

Installation of the equipment must comply with local and national electrical codes.

Statement 1074

Warning

This unit is intended for installation in restricted access areas. A restricted access area can be

accessed only through the use of a special tool, lock, and key, or other means of security.

Statement 1017

Warning

This product relies on the building's installation for short-circuit (over current) protection. Ensure

that the protective devices is rated not greater than 20A (North America), 16A (Europe),and 13A

(UK).

Statement 1005

Caution

To ensure proper airflow it is necessary to rack the servers using rail kits. Physically placing the units

on top of one another or "stacking" without the use of the rail kits blocks the air vents on top of the

servers, which could result in overheating, higher fan speeds, and higher power consumption. We

recommend that you mount your servers on rail kits when you are installing them into the rack because

these rails provide the minimal spacing required between the servers. No additional spacing between

the servers is required when you mount the units using rail kits.

Caution

Avoid uninterruptible power supply (UPS) types that use ferroresonant technology. These UPS types

can become unstable with systems such as the Cisco UCS, which can have substantial current draw

fluctuations from fluctuating data traffic patterns.

Cisco APIC M4/L4 Server Installation and Service Guide

Installing the Server