McQuay MDS030AR Applications Manual page 11

1.3.4 Energy Saving
The inverter system capacity modulation range is from 30% to 100%, while MDS system
capacity modulation range is from 10% to 100%;
Quick response to the capacity modulation;
Min. power consumption is only 10% of the full load power consumption;
Compared to the inverter system, there is no power consumption of transducer;
Compared to the nominal capacity scroll system, it can save 20% energy consumption.
Traditional air Traditional
conditioning system inverter system
1.3.5 Flexible Combination of Indoor Units
Max. capacity of the indoor units can reach 130% capacity of the outdoor unit;
Number of the indoor units connected to the outdoor unit depends on the capacity of the outdoor
unit;
One outdoor unit can be connected up to 48 indoor units;
Various types of indoor units are available according to the decoration of the room;
There are various indoor units for option: ceiling cassette, ceiling concealed, high static
pressure duct and ceiling exposed/floor standing.
1.3.6 Reliable Long Piping Connection Design
Max. piping length is 150m (12HP-30HP), max. height between outdoor unit and indoor
unit is 50m (8HP-30HP).
Max. piping total
length(m)
12~30HP
8~10HP
5~6HP
4HP
3HP
Note OT means the outdoor unit is above the indoor unit. IT means the outdoor unit is below the indoor unit.
MDS system
Max. piping
length(m)
350 150
250 125
150 70
150 70
100 50
Design & installation Guide For McQuay MDS Multi System
10HP system
Digital
compressor operating
Nominal capacity
compressor
100% operating
H Load
Height(m)
OT
50
50
30
20
20
Digital
compressor operating
L
IT
40
40
30
20
20
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