Specifications

The unique Heat Interchange Circuit (HIC) enhances efficiency by providing additional sub-cooling and allows the
expansion device to effectively control the refrigerant distribution, thereby increasing the operating efficiency and
reducing the volume of refrigerant in each system.
Heat Interchange Circuit
CITY MULTI Refrigerant Circuit
Condenser
High temperature
Supercooled
heat exchanger
Low temperature
LEV
Medium temperature
Bypass
LEV
Heat exchanger
Compressor
Accumulator
Evaporator
Common Refrigerant Circuit
Condenser
LEV
Compressor
Accumulator
Evaporator
Unbeatable Efficiency
I nverter Driven Compressor
Technology - now up to 50HP
Using inverter driven technology
saves energy for several reasons:
The compressor varies its speed to match the indoor cooling or heating demand and therefore only consumes the
energy that is required.
When an inverter driven system is operating at partial load, the energy
efficiency of the system is significantly higher than that of a standard fixed
speed, non inverter system.
The fixed speed system can only operate at 100%, however, partial load
conditions prevail for the majority of the time. Therefore fixed speed
systems cannot match the annual efficiencies of inverter driven systems.
Using proven single inverter driven compressor technology, the CITY
MULTI range is favored by the industry for low starting currents (only 8 amps
for a 16HP YJM-A outdoor unit), and smooth transition across the range of
compressor frequencies.
100%
15%
15Hz Cooling:74Hz
Heating:81Hz
Heating / Cooling Capacity
Linear Capacity
Control
Compressor Frequency
* image
Low
Starting
Currents
Low
Starting
Currents
All CITY MULTI compressors are inverter-driven type.
-Capable of precisely matching a building's cooling and heating demands.
The outdoor unit combinations comprise 1 unit for 8-18HP systems (for Y and R2 series), 2 units for 20-36HP
systems (for R2, 18-36HP) and 3 units for 38-50HP systems (Y series only). Each unit carries one inverter
compressor making simple and highly reliable control possible.
Not only does it allow low starting currents, the inverter-driven compressor also provides precise indoor comfort
and adapts to the air conditioning load.
Inverter
capacity
load load load
100%
capacity
100%
capacity
100%
1 inverter compressor
Y series 8-18HP
R2 series 8-18HP
Y series 20-36HP
Y series 38-50HP
R2 series 18-36HP
2 inverter compressors
No1
No1
No2
3 inverter compressors
No1
No1
No1
No2
No2
No3
Stable and smooth operation
* The values vary depending on the actual
conditions such as ambient temperature.