Third-generation VZH scrolls bring further seasonal efficiency gains Danfoss Inverter Scrolls VZH range from 4 to 26TR Danfoss has boosted the part load performance and the operating map of its leading VZH variable speed scroll compressor range. The third-generation commercial inverter scrolls retain the strengths of the previous version, with the addition of the Intermediate Discharge Valve (IDV) technology for enhanced seasonal efficiency, and a wider operating map. The products are particularly suitable for comfort reversible applications and computer room air conditioning (CRAC) units. Matthieu Stoll, Global Marketing Director A/C, Danfoss Cooling said: “The introduction of IDVs in the large models means that there’s no longer a need for high- and low-pressure compressor optimization – potentially halving inventory management requirements. And the wider operating map brings huge value for strategic applications. We can accelerate the changeover from older Danfoss ...