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Eaton 93PM UPS 480V Three-Wire – 100 kW Frame Installation and Operation Manual 164000227—Rev 07
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There shall be at least a 1.8°F (1.0°C) difference between the dry bulb temperature and the wet bulb
temperature, at all times, to maintain a non-condensing environment.
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The maximum rate of temperature change shall be limited to 3°F over 5 minutes (36°F/hour), based on
the ASHRAE Standard 90.1-2013.
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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.
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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.
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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.
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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:
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Ambient Temperature Range: 5–40°C (41–104°F)
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Recommended Operating Range: 5–40°C (41–104°F)
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Maximum Relative Humidity: 5–95%, noncondensing
CAUTION
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
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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.
Summary of Contents for 93PM Series
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