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Design & installation Guide For McQuay MDS Multi System
1.3 Main features
1.3.1 Wide range and stepless capacity modulation
■ Wide capacity modulation range(10%-100%) ;
■ According to changing the ratio of “loading time”and “unloading time, MDS can modulate
the capacity steplessly;
■ Lower the energy consumption and running cost.
1.3.2 Accurate temperature control and quick response.
■ The cooling/heating capacity of the indoor units is controlled by the EXV,
which ensure the low temperature fluctuation of ± 0.3℃;
■ Stepless capacity modulation;
■ Quick response to output the capacity (40s).
1.3.3 Simple, reliable and long life
■ The PWM valve has the longevity of 40 million times
■ Wide range of capacity modulation makes sure
the start/stop times reduces
■ Less components
■ No complicate inverter controller
■ The compressor has an excellent oil return
performance, there is no need for the oil return
circuit
■ Even the units run in 10% part load, the MDS
system can be in good stage.