Mechanical Specifications
5 -- 5
Liebert HPC---S 006---022---PD---273571---01.03.2012
cessor control. The EC technology includes a permanent magnet rotor combined with an electronic
switching control of the stator magnetic field directly integrated in the motor (brushless motor). Such
electronic switching device manages the fan rotation speed modulation. Compared to the traditional in-
duction three---phase motors, the inner losses in the iron reduce by 60% and in the copper by 40%, with
an electric absorption lower by 20---30% than those of a traditional fan with induction three---phase motor,
getting the same aeraulic performance. Further, while modulating the
speed, the absorbed power can be equal to 50 % than one of a tradition-
al fan with phase cutoff adjustment (TRIAC).
A general noise reduction is further obtained, as the EC techno-
logy used for the adjustment does not cause magnetic vibra-
tions, not even on special frequencies corresponding to certain
rotation speeds. Finally, the decrease of pickup currents thanks
to the EC technology and the absence of sliding contacts for the
rotor supply significantly reduce the stresses that negatively in-
fluence the component life, increasing the machine overall reli-
ability.
Electrical Panel
The electrical panel is designed, constructed and tested in compliance with IEC standards
(EN60204---1). The board is installed in a closed technical compartment (compressors compartment),
thus it features a protection degree equivalent to IP54. It is possible to access the iCOM control display
without switching the unit off, so as to aid maintenance operations.
The cooling of the electrical panel is achieved through forced ventilation. For low ambient temperatures
(below ---5° C) it is possible to have an electric heater fitted inside (optional).
Main features:
D
power supply, 400±10% V/3 ph/50 Hz + PE;
D
auxiliary power supply circuit, 230 V/1 ph/50 Hz and 24 V/1 ph/50 Hz;
D
main switch;
D
protection MCBs for compressors, fans and pumps;
D
contactors for compressors and pumps;
D
relay for checking phase sequence, minimum voltage, loss one or more phase;
D
manual operation through iCOM controller;
D
PFC(Power Factor Correction) for compressors (option);
D
compressors electronic soft start (option);
D
volt---free contacts for remote indication of:
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compressors in operation;
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pump(s) in operation;
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general alarm;
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warning alarm;
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external input for remote ON/OFF;
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only for G version also:
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tandem compressor alarm 1/2;
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high temperature inlet/outlet water alarm;
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water flow alarm;
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condenser fan failure;
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configurable free contact;
Packing
Units are shipped with plastic film protection.
Warranty Clauses
The warranty does not apply for any damage or malfunction that may occur during or as a result of opera-
tion outside of the application range.
The warranty does not apply to the freecooling units for damage due to frost if the hydraulic circuit has
not been charged with a water---glycol mixture with % suitable to the minimum temperaturesin the applic-
ation site. The company is not responsible for damage due to incorrect or improper use of the product
and it reserves the right to change technical specifications without any prior notice.
Summary of Contents for HPC-S 006
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