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Features and Benefits
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Liebert HPS---PD--- 272965---20.11.2009
Distribute the air in the best way
The HPSE, ceiling mounted indoor unit is thought to send the cold air straightly down, close to
the racks suction area and intakes the hot air out coming from the heat sourc e s, into the cabinet
sides (frontal and lateral).
In this way the mixing effect between conditio ner cold air and electronic equipment hot air is
denied resulting in a double beneficial effect: the rack is fed by cold air where it is needed and
the air condit ioner treats only the hot air maximizing it s efficiency.
Proper temperature inside the racks, high efficiency of the cooling equipment , hot spot absence
in the site: distributing the air in a smart way is very effective.
Save energy and space
The use of the optional freecooling gives the possibility to stop the compressor and use the ex-
ternal fresh air to cool the site: the annual energy absorption, requested to cool the site, goes
sensibly down. The 0---100% fine modulation allows to keep constantly the desired set point in-
side the site.
No adding module is requested when using the HPSE ceiling mounted indoorunit: the innovative
rotary freecooling system keeps unchanged the requested space to install the unit.
Use the additional freeco oling module to have the wall mounted (SE_W) solution.
Maximize site reliability
Remote nodes need to exchange data continuously, always working at proper environmental
conditions.
Therefore the air conditioner reliability is not an option: it’s a must.
The most modern design and components such as scroll compressor and plug---type fans, heat
exchanger surfaces and airflows generously designed allow the unit to work 24h/day, 365 days.
Maximize the unit reliability selecting the emergency cooling option: in case of main supply fault
the air conditioner is supplied by al ternative energy sources like 48 VDC batteries or independent
AC generator.
Start---up quickly and easily the site
Liebert HPS is ceiling mounted (HPSE) or wall mounted (SE_W): 2 rows with screws have to be
used to easil y fix the unit to the site ceiling or wall. No inte r nal wiring of the air conditioner is re-
quested thanks to the availability of the fast plug electrical connector s (special on request).
The auto test software checks automatically all the main components operations, speeding up
thesitestartupprocedure.
Choose the cooling unit suitable to your application
Liebert HPS assures optimal air distribution, efficiency, energy saving, reliability, compactness
whatever is its configuration. More stringent requirements in terms of noise level emission and
maximum external working temperature, can be s atisfied selecting HPSC advanced version: 45
dB(A) at 3m f.f and 50˚C with internal conditions o f 27˚C, 35% R.H. at 1.5m from site floor.
Long piping installations are not anymore a limit: using the “L” condenser vers i on, high perform-
ances are ass ured also when distance between outdoor and indoor unit is prohibitive.
Respect the environment: ODP, TEWI and . . . noise level
Now days green refrigerants are a standard (low Ozone Depletion Potential)! More than t his, the
most effective way to respect the environment is to reduce the energy absorption with a high effi-
ciency refrigerant cycle.
Liebert HPS reach a high EER (Energy Efficiency Ratio) value thanks to the use of large surface
heat exchangers; this effect is maximized by the U ---Shape coil used in the evaporating side. The
relevant Total Equivalent W arming Impact (TEWI) value is reduced.
Finally the importance of a low noise level: a different way, not less important, t o respect the envir-
onment.
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Optimal racks feedings
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High cooling efficiency
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Minimize the energy
consumption with the
most compact solution
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Reliabl e components
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Emergency free
(cooling) system
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Fast plug electrical
connectors
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Automatic test
start ---up software
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HPSC Advanced
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Lownoise level
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Extreme environmental
conditions
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Longpiping
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Green refrigerants
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High efficiency
refrigerationcycle
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Lownoise level
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