Liebert 130 kVA - Manual (Page 28)

User Manual
Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V
8
2.2 Environmental considerations
2.2.1 UPS location
The UPS module should be located in a cool, dry, clean-air environment with
adequate ventilation to keep the ambient temperature within the specified operating
range (see Chapter 9 - Specifications).
All models in the ‘Hipulse’ UPS range are cooled with the aid of internal fans. Cooling
air enters the module through ventilation grills located at various parts of the cabinet
and exhausted through grills located on the back of UPS. When the cabinet is located
on a raised floor, and bottom cable entry is used, additional cooling air also enters the
UPS via the floor void. If necessary, a system of extractor fans should be installed to
aid cooling air-flow, and a suitable air filtration system used where the UPS is to
operate in a dirty environment.
Note 1: When batteries are cabinet-mounted adjacent to the UPS module, it is the battery which
dictates the designed maximum ambient temperature, not the UPS.
Note 2: Power losses from the System which may be used in an air conditioning system are intended
for operation using the Inverter, as in the ECOMODE configuration they would be undersized.
2.2.2 Battery location
Temperature is a major factor in determining the battery life and capacity. Battery
manufacturers quote figures for an operating temperature of 20 o C. Operating above
this temperature will reduce the battery life, operation below this temperature will
reduce the battery capacity. On a normal installation the battery temperature is
maintained between 15 o C and 25 o C. Batteries should be mounted in an environment
where the temperature is consistent and even over the whole battery. Keep batteries
away from main heat sources or main air inlets etc.
The batteries can be mounted in purpose-built battery cabinet, which is positioned
adjacent to the UPS module. Pedestals are required for the battery cabinets when
they are located on raised floors, in the same way as for the UPS cabinets. If the
batteries are rack-mounted, or otherwise located remote to the main UPS cabinet, a
battery circuit breaker must be mounted as close as possible to the batteries
themselves, and connected using the most direct route possible. A customized
remote battery circuit breaker box, containing the circuit breaker and its necessary
control board, is also available as a standard option.