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118 Specifications and Ratings
5.2 Environmental Conditions
Enclosure: The UPS is housed in a NEMA-1 enclosure. The enclosure is
designed for indoor use only and is not to be subjected to falling
objects or precipitation.
Recommended Operating
Temperature:
25°C
Maximum Operating Temperature: 40°C (design temperature) without derating
Minimum Operating Temperature: 0°C
Storage Temperature:
-20°C to 70°C
Typical Battery Temperature
Requirements:
Average annual temperature shall not exceed 27°C. Peak
temperature shall not exceed 43°C during any 24
-hour period. See
battery manufacturer’s recommendations.
Relative Humidity: 0 to 95% without condensation
Operating Elevation: Sea level to 1219 meters (4000 ft.) without derating
Storage Elevation: Sea level to 12,192 meters (40,000 ft.)
Audible Noise: 69 dBA typical, measured 5 feet from unit
Derating for Higher Ambient
Temperatures:
91% at 45°C
82% at 50°C
73% at 55°C
Consult your Liebert sales representative regarding applications in
high ambient temperatures. Special temperature sensors must be
installed at the factory.
Derating for Higher Elevations: 95% at 2000 meters
94% at 2200 meters
93% at 2400 meters
92% at 2600 meters
91% at 2800 meters
90% at 3000 meters
NOTE
This category of electronic equipment is agency rated for use in an atmosphere free of
conductive particles. Some industrial facilities may require a room air filtration
system to keep the UPS free of excess moisture and contaminants.
The UPS system is designed to operate continuously at 40°C. However, design
equipment life expectancy will be extended with lower temperatures (25°C is
recommended).