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MHI CO2 condensing units simplify installation

JAPAN: Mitsubishi Heavy Industries is to introduce 10hp and 20hp C-puzzle CO2 refrigeration condensing units using a new oil management system onto the Japanese market.

The two new models – the 10HP HCCV1001C and 20HP HCCV2001MC – will go on sale exclusively in the Japanese market this summer.  

Both new models employ MHI’s proprietary new M-DIOMAC packaged oil management system which is said to simplify on-site adjustments of the refrigeration units, enabling simpler installation. The system comprises a dedicated system controller and remote controller.

As up to three condensing units, which function as the outdoor units, can be interconnected, control is possible to a maximum of 60hp. The cooling units, such as the showcase and unit cooler, serve as the indoor units. 

With the 10hp condensing unit, up to eight cooling units can be interconnected, while for the 20hp model up to 16 cooling units can be interconnected. 

Using the remote controller, which features a full-color 7in liquid crystal display, monitoring from a distance is possible. Also, information on cold room temperature, set temperature, degree of superheat, opening degree of expansion valve, etc. can be displayed for 8 units, allowing for easy confirmation of operations.

Operating temperature range is -45℃ to -5℃ in ambient operating temperatures of -15℃ to 43℃

Under Japan’s Act on Rational Use and Proper Management of Fluorocarbons, commercial condensing units having a compressor with a rated output exceeding 1.5kW will be required to adopt refrigerants with a GWP below 1500 by 2025. 

Models in the C-puzzle series first marketed in 2017 are equipped with MHI Thermal Systems’ two-stage compressor, a special configuration of a scroll compressor and a rotary compressor.

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