Building Services Engineering l March/April 2020
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The KXZR 3-pipe system offers the highest levels of design flexibility, improved efficiency and enhanced operational function.
KXZR 3-pipe system from Mitsubishi Heavy Industries The Mitsubishi Heavy Industries KXZ VRF series delivers
high performance in cooling and heating for all commercial applications, and incorporates the highest level of design flexibility, improved efficiency and enhanced operational functions. Features of the new series include the following: • Improved energy efficiency and in mixed mode;
• Expanded line-up from 8HP to 60HP; • Additional Hi-COP combination 16HP to 36 HP for increased energy efficiencies; • Improved EERs and COPs compared to the previous model; • Improved heating capacity in low ambient temperature; • Improved cooling capacity in low ambient temperature;
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• Improved and newly-designed branch control boxes. There is now a choice of different indoor units available, with connection capacities ranging from 50% to 200%, depending on the outdoor unit model. This ensures maximum feasibility and installation flexibility. Similar to its 2-pipe sister model KXZ, the 3-pipe KXZR’s improved EERs and COPs are due to a new multi-discharge compressor that optimises the pressure control during operation. There is also a new concentrated winding motor. These have led to increased seasonal energy efficiencies, especially in partial load conditions. The newly-introduced “Continuous Heating Capacity Control (CHCC)” or the 3-pipe units increases the heating period of the outdoor unit and reduces the mandatory defrost operation to a minimum. This new control ensures, and dramatically increases, comfort for the user during defrost operation. The new software on the outdoor unit PCB will now also automatically select the most energy-efficient modus during “mixed mode” (both heating and cooling demand at the same time), with maximum COPs of 9.0. The outdoor units feature a divided heat exchanger which dramatically improves cooling capacity in low ambient temperatures. This increases the operation without anti-frost operation down to -5°C. Finally, the newly-designed branch control PFD-boxes now boast much lower noise levels, thanks to new insulation and external covers, with levels for the operation switch down to around 10db(A). Contact: MHI Distributors – Diamond Air Conditioning. Tel: 01 – 636 3131; www.diamondair.ie; DWG. Tel: 01 – 463 7311; www.dwgeire.ie Mitsubishi Heavy Industries’ 3-pipe KXZ VRF series.
MHI edit.indd 1
24/03/2020 16:57
