Emerson NX manual Other DC Sources, Environmental Conditions, Battery Operation

Specifications

5.0SPECIFICATIONS

5.1DC Sources

5.1.1Battery Operation

The separate battery manufacturer’s manual, available on the manufacturer’s Web site, provides the necessary information for the installation, operation and maintenance of the battery. Use the battery manual in conjunction with this manual.

The float charge voltage for a battery is equal to the number of cells in series making up the battery multiplied by the charge voltage for each cell.

Because the charging voltage level is critical to proper battery operation, refer to your battery manual, available on the manufacturer’s Web site, for information about your system.

For models with nominal 240-cell battery, the DC bus nominal float voltage range is 2.15 to 2.30VPC.

Maximum equalize voltage is 2.45VPC. Battery voltage at end of discharge is 1.65VPC at the UPS terminals. The number of battery cells required ranges from 228 to 246, depending on the application.

5.2Other DC Sources

The separate DC source manufacturer’s manual, available on the manufacturer’s Web site, provides the necessary information for the installation, operation and maintenance of the DC source. Use the DC source manual in conjunction with this manual.

5.3Environmental Conditions

Table 7	Environmental specifications
Parameter		Specification
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		77 (25) ambient
Temperature, °F (°C)
Maximum Operating		104 (40) ambient (design temperature) without derating; (see Notes 2 and 3).
Temperature, °F (°C)
Minimum Operating		32 (0)
Temperature, °F (°C)
Storage Temperature, °F (°C)		-13 to 158 (-25 to 70)
Typical Battery Temperature		Average annual temperature must not exceed 80°F (27°C). Peak temperature
Requirements		must not exceed 109°F (43°C). See battery manufacturer’s recommendations.
Relative Humidity		0 to 95% without condensation
Operating Elevation, ft, (m)		Sea level to 3000 (1000) without derating
Storage Elevation, ft, (m)		Sea level to 50,000 (15,240)
Audible Noise, 5ft (1.5m)		68 dBA, typical
from Unit

Notes on Environmental Specifications

1.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.

2.The UPS system is designed to operate continuously at 104°F (40°C). However, design equipment life expectancy will be extended with lower temperatures (77°F [25°C] is recommended).

3.Ambient temperature is the maximum ambient temperature during any 24-hour period. For operation at higher temperatures, consult your Emerson® sales representative or call Liebert Services at 1-800-LIEBERT.

4.Exercise care during installation to ensure unimpeded airflow through the UPS.

5.For operation at higher elevations, consult your Emerson sales representative or call Liebert Services at 1-800-LIEBERT.

Liebert®NX™ 38