14 User Manual 10H52188UM51 - Rev. 1 - 09/2011
Single UPS Installation and Commissioning Liebert NXC
UPS room (when Battery is integrated)
A small amount of hydrogen and oxygen will be generated at the end of battery charging, therefore, you must ensure that the
fresh air ventilation of battery installation environment meets the EN50272-2001 requirements.
The battery ambient temperature should be the constant temperature, for the ambient temperature is the main factor to affect
the battery capacity and life. The battery standard operating temperature is 20°C, operation above this temperature will
shorten the battery life, and operation below this temperature will reduce the battery capacity. If the battery average
temperature in operation rises from 20°C to 30°C, the battery life will be reduced by 50%; if the battery temperature in
operation exceeds 40°C, the battery life will be decreased exponentially. In general, the enabled ambient temperature of the
battery is 15°C ~ 25°C. The battery should be kept away from heat and ventilation holes.
When the UPS uses an external battery, you must install a battery protective device (such as fuse or circuit breaker) in areas near
the battery, and use the shortest wiring distance for the protective device and battery connection.
Storage
The UPS must be stored indoors, so as to be protected against the excessive moisture or overtemperature environment, when
the UPS does not need to be installed immediately. The battery requires dry and low temperature, well-ventilated environment
for storage, and the most suitable storage temperature is 20°C ~ 25°C.
Warning: battery hazards
During the battery storage, the battery must be periodically charged according to the battery instructions. You can connect the UPS to
the mains temporarily when charging the battery,
so as to charge the battery for battery activation
.
2.2.4 Installation Tools
Prepare installation tools according to Table 2-1. The tools must be insulated and ESD-proof processed prior to use.
Table 2-1 Installation tools list
Installation tool Specification Application
Cross screwdriver EJ5100mm Remove the screws of the terminal block cover, or open the chassis
Slotted screwdriver EJ375mm Connect I/O cables
Wire-pressure plier YT-12 Press wires for I/O terminal block
Diagonal plier MTC3C Make I/O cables
2.3 External Protective Device
The circuit breaker or other protective devices must be installed at the external AC input port of the UPS. This section provides
the general guidance for qualified installation engineer. The qualified installation engineer should learn about the local wiring
regulations for the equipment to be installed.
2.3.1 Rectifier And Bypass Input
Overcurrent
The appropriate overcurrent protective device should be installed on the mains input power distribution, and the current
capacity of power cable and the system overload requirements should be taken into account in installation (see Table 2-1). It is
recommended to use the thermo magnetic circuit breaker which satisfies with IEC/EN 60947-2 tripping curve C (normal) when
the current value reaches 125% of the current value listed in Table 2-2.
Split-bypass
When the system adopts split-bypass, separate protective devices should be installed at the mains input power distribution
respectively for the mains and bypass.
Main/Bypass backfeed protection
When using the main/bypass backfeed protection function, you need to install a protective device with auxiliary contact
function at the user’s gross mains input air breaker (including the main input and bypass input), and this auxiliary contact signal
should be connected to the system dry contact port.
To Next Page
Loading...
