Table 3-1. Air Conditioning Or Ventilation Requirements During Full Load Operation - Eaton 93PM UPS Installation And Operation Manual

20–50 kw (480v four wire) – 50 kw frame

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UPS Installation Plan and Unpacking

The newer, more energy efficient data center cooling methods (such as air side economization) can create

much wider ranges of temperature and Relative Humidity (RH) in the UPS room and/or data center. There

are two aspects of this increased operating environment that can, if ignored, create issues.

- One is the creation of microclimates, which are persistent variations of temperature and/or RH within a

single room. For example one side of the room is always cooler than the other side, no matter the actual

temperature.

- The other aspect is the rate of change of temperature and/or RH, which can occur during transitions

within the cooling system. Examples: changing the mixture ratio of inside versus outside air, or external

changes in the outside air when going from night to day, and back to night.

- When ignored, either one of these aspects can create an undesirable microclimate at the UPS location. If

the environment created by this microclimate exceeds the UPS operating specification, the UPS reliability,

over time, will be reduced. These same environmental extremes will also create reliability concerns for

any servers that are exposed to them.

Failure to follow guidelines may void your warranty.

The basic environmental requirements for operation of the UPS are:

Ambient Temperature Range: 5–40C (41–104F)

Recommended Operating Range: 5–40C (41–104F)

Maximum Relative Humidity: 95%, non-condensing

If battery systems are located in the same room as the UPS, the battery manufacturer's

environmental requirements should be followed if they are more stringent than the UPS

requirements. Operating temperatures above the recommended range will result in decreased

battery life and performance, and may reduce or void the battery warranty.

The UPS ventilation requirements are shown in Table 3-1.

To allow for future power upgrades, Eaton recommends using air conditioning or ventilation sized for the fully

rated UPS kW frame size installed instead of the derated kW ordered. Sizing the site cooling infrastructure to

be capable of cooling the maximum kW frame size will allow a full power rating upgrade without having to

modify the infrastructure.