Danfoss has added new 8.5 TR and 11 TR (*) variable speed compressors with IDV(**) to its popular VZH range, giving commercial cooling manufacturers the market’s most complete choice of variable speed scrolls with qualified drives for HVAC systems.

In particular, the new inverter scrolls are ideal for data centre close control and rooftop units, where they will enable precise and efficient cooling.

They’re also an excellent fit for rooftop units, helping manufacturers to meet challenging new seasonal and part-load efficiency standards (IEER), like the US Department of Energy’s energy conservation regulations coming into force in 2023.

Likewise, for chillers, the Danfoss VZH range will enable OEMs to develop a competitive range of systems capable to exceed the demanding Ecodesign Lot 21 targets coming into force by 2021.

Luigi Zamana, senior marketing director for Danfoss Commercial Compressors, said the extended VZH range also gives OEMs the opportunity to work with a single, proven supplier of pre-qualified variable speed compressor and drive packages, from 4 TR up to 26 TR, with scroll technology and from 60 TR to 400 TR with oil-free Turbocor technology.

Worldwide, energy efficiency standards are increasingly based upon seasonal efficiency measures like the Seasonal Energy Efficiency Ratio (SEER), Integrated Energy Efficiency Ratio (IEER), and Integrated Part Load Value (IPLV).

These standards are designed to better reflect the actual average and yearly load profile.

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