Table 9. Maximum air volume, PowerMax 8000 (continued)
Number of PowerBricks Units
4 1,982 cfm (55.5 m
3
/min)
System Bay 2 1 545 cfm (15.3 m
3
/min)
2 980 cfm (27.4 m
3
/min)
3 1,525 cfm (42.7 m
3
/min)
4 1,960 cfm (54.9 m
3
/min)
Temperature, altitude, and humidity ranges
The following table provides the recommended environmental operating ranges.
Table 10. Environmental operating ranges
Condition System
Operating temperature (normal conditions)
a
10°–32°C (50°–90°F) at 2,286 m (7,500 ft)
10°–35°C (50°–95°F) at 950 m (3,317 ft)
Operating temperature (excursion limit), 24 hours annually 32°–50°C (50°–122°F) at 2,286 m (7,500 ft)
Operating altitude (maximum) & derating 3,048 m (10,000 ft) derate 1.1°C per 305 m above 2,286 m
Operating humidity range 20% to 80% RH non-condensing
Operating temperature rate of change 20°C/hour
a.
These values apply to the inlet temperature of any component within the bay.
Temperature and humidity range recommendations
The following table provides the recommended operating and humidity ranges to ensure long-term reliability, especially in environments
where air quality is a concern.
Table 11. Temperature and humidity
Condition System
Operating temperature range 64°— 75° F (18° to 24° C)
Operating relative humidity range 40 — 55%
Air quality requirements
PowerMax arrays are designed to be consistent with the requirements of the American Society of Heating, Refrigeration and Air
Conditioning Engineers (ASHRAE) Environmental Standard Handbook and the most current revision of Thermal Guidelines for Data
Processing Environments, ASHRAE TC 9.9 2011.
The arrays are best suited for Class 1A Datacom environments, which consist of tightly controlled environmental parameters, including
temperature, dew point, relative humidity and air quality. These facilities house mission critical equipment and are typically fault tolerant,
including the air conditioners. In a data center environment, if the air conditioning fails and the temperature is lost, a vault may occur to
protect data.
The data center should maintain a cleanliness level as identified in ISO 14664-1, class 8 for particulate dust and pollution control. The air
entering the data center should be filtered with a MERV 11 filter or better. The air within the data center should be continuously filtered
with a MERV 8 or better filtration system. In addition, efforts should be maintained to prevent conductive particles, such as zinc whiskers,
from entering the facility.
The allowable relative humidity level is 20–80% non condensing, however, the recommended operating environment range is 40–55%.
For data centers with gaseous contamination, such as high sulfur content, lower temperatures and humidity are recommended to minimize
16
System Specifications
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