Mechanical Specifications
5 -- 2
Liebert HPC---S 006---022---PD---273571---01.03.2012
Each compressor is featured by:
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Optimized R410A design that ensures:
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Higher EER.
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Wide operating range: lower condensation and higher evaporation
envelope gives more energy savings.
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Lower sound emission level.
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Lighter systems.
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More compact equipment.
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Axial and Radial scroll compliances for high tolerance to liquid.
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Self-lubricated Teflon bearings for high tolerance to liquid sand low oil
level.
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Low leak check valve prevent high side liquid migration and facilitate
pressure equalization inside. the compressor (unloaded start-up).
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ASTP or PTC scroll thermal protection.
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Discharge system for low sound emissions an high volumetric efficiency.
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High accuracy balancing system to reduce vibrations.
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Motor cooled by the suction gas with suitably fit thermal probes.
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Motor cooling channels with low flow resistance.
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Reduced weight and overall dimensions.
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Case with electric supply terminals and electronic protection module.
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Efficient oil distribution system.
All these features aim to achieve values of efficiency (EER), sound emission, vibrations, reliability, operat-
ing range, resistance to liquid blows and compactness that cannot be compared with those of other com-
pressors with the same capacity but with different technology.
Each compressor is equipped with a three---phase asynchronous two---pole motor cooled by the suction
gas. The motor is equipped with electronic protection device.
The compressor is further equipped with:
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rubber anti---vibration mounts;
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polyester oil charge;
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oil indicating sight glass;
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oil charge/discharge connections;
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crankcase heater.
The iCOM control manages the operation of the compressors so as to ensure always their operation with-
in their limits with top reliability; the “HP” and “LP” alarms, the motor thermal protection, the start times
and the min. operation---pause times and their rotation are indeed motor---driven and controlled.
Electronic Expansion Valve
The electronic expansion valve used in -the
Liebert HPC-S 006---022
G version enables accurate and min. possible controlof the overheating
of the gas sucked by the compressor under all load conditions, together
with the operation at low condensation and high compressor un-
loading. Under such application conditions a mechanical expansion valve can nev-
er reach the performance ensured by an electronic expansion valve (with energy
benefits) nor the functional stability, above all during the transients of the load vari-
ations (with benefits as for reliability). The final result of the application of the elec-
tronic expansion valve on
Liebert HPC-S 006---022
is therefore an improved en-
ergy operating costs and a higher reliability, thanks to its special adjustment
features above all on partial loads, conditions under which every chiller operates
for most of the time.
Evaporators
Liebert HPC---S 006---022
units are equipped with direct expansion, weld---brazed plate type evaporat-
ors, designed, constructed, tested (pressure test on both refrigerant and water sides) and documented
to comply with PED 97/23/EC standards. The corrugation (typical angle) and the design of each plate
have been thoroughly analyzed and thus optimized to better meet the physical features of the refrigerant
(R410A) and provide for an optimal refrigerant distribution. This means really outstanding performance
in the thermal energy transfer.
They incorporate one refrigeration circuit and one water circuit. The plates are fabricated from seamless
carbon stainless steel AISI 316, reciprocally welded with pure copper.
Summary of Contents for HPC-S 006
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