Ultracompact

Compact air-cooled chillers with scroll compressors and microchannel condensing coils for use with refrigerant R410a

50 – 300 kW

Applications: Air conditioning • Process cooling • Refrigeration • Commercial • Residential

VERSATILE SOLUTION FOR CHILLED WATER PRODUCTION

Ultracompact is a family of air-cooled chillers that offer best-in-class efficiency in a compact footprint and provide capacity-matched cooling, precise temperature control and water flow. Housed in a lightweight, aluminum enclosure, these chillers are easy to install and startup, require minimum maintenance and distinguish by a long service life.

An extensive set of optional components among which hydronic modules, water tanks, heat recovery system, low-noise configurations, and more makes Ultracompact chillers a versatile and flexible solution for air conditioning, industrial process cooling, and refrigeration applications.

Scroll compressor

SCROLL COMPRESSORS

RELIABLE SOLUTION FOR ENSURED CONTINUITY IN APPLICATIONS

The combination of an energy-efficient motor and an optimized scroll wrap for refrigeration applications delivers high efficiency in Ultracompact’s compressors. Reliability is built into this compressor range, from the compliant scroll design and the engineered bearings to the simplified design. Thermal fault protection also contributes to excellent reliability.

As a predominant operating mode of typical Ultracompact applications is part-load, particular importance was placed on low energy consumption at low saturation discharge temperatures.

Customers of Ultracompact chillers with multiple scroll compressor technology can benefit from time-proven reliability, low sound levels, low vibration, and minor operating and maintenance costs.

POWER-SAVING FANS

AXIAL FANS WITH REDUCED POWER CONSUMPTION

Ultracompact’s new intelligent fan system consisting of profiled, sickle-shaped axial fans, multifunctional air guide vanes, and optional diffusers – provides maximum flexibility, lowest sound emissions, and the highest degree of energy efficiency.

Standard configuration includes AC-motor fans, while the fans with electronically commutated (EC) motors that produce savings in both full-load and partial load operations are available as an option.

Brazed plate heat exchanger

EVAPORATORS

BRAZED PLATE HEAT EXCHANGERS

As the evaporator approach temperature difference becomes small, the performance of the system improves, and therefore the operating cost is reduced. To keep the minimal approach temperature, we adopted the most efficient plate evaporators available today and lifted the compressor COP to save as much energy as possible.

Brazing the stainless steel plates together eliminate the need for gaskets and thick frame plates, which makes the heat exchanger compact. The special plate design guarantees a consistent braze joint at the plate overlap and makes for stronger and more leak-proof heat exchanger. The brazing material seals and holds the plates together at the contact points, ensuring optimal heat transfer efficiency and pressure resistance. Using advanced design technologies and extensive verification guarantees the highest performance and longest possible service lifetime.

MICROCHANNEL CONDENSERS

All-aluminium microchannel condensing coils used in Ultracompact air-cooled chiller range allows achieving the number of advantages that improve energy efficiency:

  • Higher heat transfer rates
  • Lower airside pressure drops and consequentially reduced fan energy
  • Lower condensing temperatures

The end result is up to 40% higher energy efficiency of the chillers in comparison to those featuring finned tube coils. Furthermore, lower condenser weight and reduced refrigerant charge translate to lower unit’s cost. Based on the all-aluminium construction, microchannel condensing coils are also subject to significantly less galvanic corrosion than traditional finned tube designs, in that there are no dissimilar metals.

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Microchannel condenser

OPTIONAL EXTRAS

  • Hydronic Modules

    Ultracompact chillers can be optionally packaged with single or dual inline pumps that come with highly efficient motors. With the unique high-precision machinery, the tolerances used in the manufacture of the impeller and pump casing are minimized to optimize the flow geometries of these two crucial components. The result: minimal backflow and increased pump efficiency.

  • Water Tanks

    Ultracompact chillers can be optionally packaged with buffer tanks. Available water tank volumes are from 150 to 350 liters, finished in thermal insulation and plastic outer coating. Tanks are equipped with necessary safety accessories, air vents, expansion vessels, filling and drain taps.

  • Heat Recovery

    High-temperature energy of the superheated refrigerant gas discharged by compressors can be turned into hot water through heat recovery options available for Ultracompact chillers:

    • Desuperheater for partial heat recovery (up to 25% of the chiller output)
    • Total heat recovery system with heat exchanger installed in parallel to condensers (100% of chiller thermal capacity)
  • Evaporation Control

    Accurate control of superheat with the Ultracompact scroll chiller operating at part load achieved with electronic expansion valves. Fitting EEV permits a reduction in power consumption of up to 30% by controlling the refrigerant flow at reduced head pressures.

    The EEV used in Ultracompact chillers are latest generation valves designed for precise liquid injection in an evaporator and includes balanced cage and slider assembly operated by direct driven motor technology. This ensures solenoid-tight shut-off in both flow directions, thus providing smooth operation of the system. The valve incorporates a powerful bi-polar motor which precisely controls flow regulation.

PRODUCT SPECIFICATIONS

Capacity [kW] 50 … 300
Design AIR-COOLED
Compressors SCROLL
Refrigerant R410A
Energy efficiency (EER) UP TO 2.98
Seasonal efficiency (ESEER) UP TO 4.22
Fan motors AC/EC
Condensers MCHE
Evaporators BPHE
Evaporation control EEV
Refrigeration circuits SINGLE/MULTIPLE
Warranty 3 YEARS