Product manual

KPMWC00905-10EN - page 3/24
Features and advantages
Next Generation Centrifugal
The industry’s next generation of centrifugal chillers is here today with WMC chillers. The new technology begins with
centrifugal compressors utilizing frictionless magnetic bearings for oil-free operation, integral variable-frequency drives,
and high-speed direct drive technology. The high efficiency compressor is matched with highly efficient heat exchangers
to make an impressive chiller. The control system is based on MicroTech II® family to provide the optimum chiller control
system.
Benefit Summary
- Breakthrough energy efficiency, especially at part load conditions, resulting in great energy savings.
- Increased reliability This frictionless magnetic bearing design needs no oil management system, resulting in
increased reliability and reduced maintenance. With no oil to coat the heat transfer surfaces, a gain in heat
exchanger efficiency can also be realized.
- Compact design and light weight The compressor weight of 120 kg is less than 20% of the weight of
competitive compressors and approximately 50% smaller, this allows a compact unit design thus making this
series the perfect choice for retrofit projects
- Low noise level The WMC chiller is one of the quietest in its size range: this eliminates the need for expensive
sound attenuation accessories and makes the unit ideal for every sound sensitive environments such as schools,
performance halls, museums, etc.
- Extremely low vibration levels As a result of the high-speed design, the compressor vibration levels are
extremely low, minimizing vibration that could be transmitted to the structure.
- Smart refrigerant choice The compressor is optimized for HFC 134a, the positive pressure refrigerant with no
phase-out schedule and no ozone depletion.
- Smart controls Onboard digital electronics provide smart controls. The compressor is totally self-correction and
incorporates a system of sophisticated self-diagnostics, monitoring and controls.
In the event of a power failure, the compressor motor acts as a generator, providing power for the bearing control
system during coast down. It also has a system to gently de-levitate the shaft.
- Easy integration with BMS The unit controller can be connected to BMS (Building Management System) based
on the most common protocols as LONWORKS®, BACnet®, or Modbus®
- Extensive option list A wide portfolio of options is available to meet different requirements
Code requirements – Safety and observant of laws/directives
All WMC units are designed and manufactured in accordance with applicable selections of the following:
Construction of pressure vessel 97/23/EC (PED)
Machinery Directive 2006/42/EC
Low Voltage 2006/95/EC
Electromagnetic Compatibility 2004/108/EC
Electrical & Safety codes EN 60204–1 / EN 60335-2-40
Manufacturing Quality Stds UNI – EN ISO 9001:2004
Certifications
All units manufactured are CE marked, complying with European directives in force, concerning manufacturing and
safety. On request units can be produced complying with laws in force in non European countries (ASME, GOST, etc.),
and with other applications, such as naval (RINA, etc.).