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Ecolite units extend refrigerant options

GERMANY: Bitzer’s Ecolite condensing units are now available for use with a full range of A2L refrigerants, including ultra-low GWP R1234ze/yf and lower GWP R455A and R454C.

The Ecolite 2.0 units are designed for use in a wide range of applications, including cold rooms, petrol stations and convenience stores, and available from 1.5kW to 5kW in low temperature versions and from 3.5 kW to 16 kW in medium temperature versions. The operating range spans -45°C up to 0°C, without requiring liquid injection.

The units employ Bitzer’s Ecoline compressors, optimised heat exchangers and variable speed fans.

Compressor capacity is managed by CRII–Varistep control, developed by Bitzer as a lower cost alternative to inverter-based systems. It enables proportional modulation of compressor output in response to changes in load and system conditions. This gives stepless capacity modulation from 50% up to 100% as standard, and 10% to 100% as an option.

Other efficiency and performance features include second set-point to control night operation; an ECO mode made possible by fine control of fan speed; a function that allows condensing temperatures to float, depending on current load and ambient; narrower band of fluctuation for low pressure, allowing higher evaporation temperatures, delivering COP gains of around 2-3%/ K ; reduced compressor starts; better control of the temperature set point.

A controller, included as standard, adds to the unit’s flexibility, offering winter start and oil return during operation. It also minimises fan motor speed while in ECO or low-sound mode.

With a rated sound power level below 40 dB(A), the unit it suitable for use in residential areas and other sensitive locations, such as hospitals.

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