Midea MC-SU75-RN8L-B Chiller

Cooling

70.00 kW
Heating

75.00 kW
EER

2.61
COP

3.16
Noise

69 dB

Aqua Thermal Chillers

Overview

Refrigerant R32 75% less impact on global warming;
DC Inverter technology allows precise consumption on real load;
One-stop solution for heating, cooling and domestic hot water;
Maximum water temperature up to 60°C for DHW mode;
Minimum operation ambient temperature down to -10℃ for cooling mode;
High energy efficiency level A++ for energy saving (Water outlet temperature at 35°C);
Space saving;
Maximum 2240kW combination capacity;
Maximum 256 units controlled through Modbus;

Ambient & Outlet Water Temperature

Note: For cooling mode, if outlet water temperature is less than 5°C, anti-freeze liquid is needed. 0°C water temperature can be reached by changing DIP switch setting.

High Quality Components

DC Inverter compressor

More compact, weight reduced by 50%
Specially designed scroll profile for R32
New structure enhances mid-frequency performance
Advanced permanent magnet DC motor improves low frequency band performance

High Efficiency Plate Heat Exchanger

Plate heat exchanger uses metal plates to transfer heat between refrigerant and water. The fluids are exposed to a much larger surface area because the fluids spread out over the plates, so both heat transfer efficiency and heat exchanger speed are greatly improved. Multi protections including voltage protection, current protection, anti-freezing protection and water flow protection ensure system safety running.

Refrigerant pipe
Water pipe
Water pipe
Refrigerant pipe

DC Fan Motors

Fan speed is controlled according to the system pressure and system load, reducing power consumption by 30%. There are 32-step vector control.

High Performance Heat Exchanger

Hydrophilic film fins and inner-threaded copper pipes optimize heat exchange efficiency. The specially coated blue fins enhance durability and protect against corrosion from air, water and other corrosive agents, assures a longer coil service life.

Heat exchanger aluminum foil

Standard products: 200h of neutral salt mist
Heavy anti-corrosion products: 1000h of neutral salt mist, 140h of acid salt mist

Heat exchanger copper pipe

Standard products: 24h of neutral salt mist
Heavy anti-corrosion products: 150h of neutral salt mist

Enlarge heat-exchanging area (Fin)
Enhance heat transfer (Inner-threaded pipe)
High efficiency (Fin + inner-threaded pipes)

Precise Flow Control

Patented liquid distribution components maximize performance and minimize impact of defrosting operation. 500-step EXV with capillary tube allows stable and accurate gas flow control. Fast response results in higher efficiency and improved reliability.

Advanced Technology

Enhanced Vapor Injection (EVI) Compressor

Thanks to the vapor injection DC inverter compressor, unit can run heating mode stably down to -20℃, and the heating capacity can be improved greatly.

Plate Heat Exchanger Subcooling

Plate Heat Exchanger as a secondary intercooler boosts up refrigerant subcooling and improves 10% energy efficiency.

Precise Oil Control Technology

Four stages of oil control technology ensure all outdoor compressor oil is always kept at a safe level, eliminating any compressor oil shortage problems.

Compressor internal oil separation.
High-efficiency centrifugal oil separator (with separation efficiency of up to 99%) ensures that oil is separated from the discharge gas and returned to the compressors in a timely fashion.
Oil balance pipe ensures oil distribution to keep compressor running normally.
Auto oil return program monitors the running time and system status to ensure reliable oil return.

Refrigerant Cooling PCB

Refrigerant cooling PCB technology reduces electric control heating under harsh working conditions, effectively reduce the temperature of electronic control components, ensure the stable and safe operation of the unit control system.

Intelligent Defrosting Technology

The intelligent defrosting program calculates the time required for defrosting according to the actual system status, eliminating heat losses from unnecessary defrosting. A specialized defrosting valve reduces time required for defrosting to as little as four minutes.

Rapid Cooling or Heating

The DC inverter compressor reaches full capacity rapidly, providing quicker cooling or heating with lower levels of temperature fluctuation during the cooling/heating operation.

Flexibility

Modular Design

Modularity is perfect when an extension of capacity becomes required as the building load range from 75kW to 2240kW.

Space Saving and Simplified Installation

Single unit covers an area of only 1.92m² , which greatly saves lots of space for group control. The hydraulic models (customized) has the water pump components inside the unit, which can save the installation cost and time and make installation easier.

High Reliability

Alternative Cycle Duty Operation

In one combination system, all units operate as alternative in cycle duty to keep equal running time, realize higher stability, better reliability and longer lifespan.

Alternate Defrost Operation

By detecting the water temperature, the proportion of defrosting unit can be determined intelligently so as to realize small water temperature fluctuation during the alternate defrosting period.

Backup Function

In a combination system, if one unit failed, other units can be back-up instead of the failed one for continuing operation.

Multiple Functions

Multiple Slient Modes

Different silent modes enable noise reduction to suit time of day and ambient noise levels.

Standard mode
Silent mode
Super silent mode
Night silent mode

Multiple Design Optimizations

1.Optimized fan blade edge by CFD programs with analyzing air pressure distribution. Realize higher air volume, lower noise level.

Guide air diffuser hood
Reduce noise effectively

Blade trailing edge dentate structure design
Blade suction surface concave design
Reduced turbulent kinetic energy

Blade installation angle optimization design
Improve airflow and fan efficiency

Large blade front edge bending sweep design
Blade outer edge falling vorticity design

Big heat exchanger area
Located in the upper part
Uniform air flow
High efficient “Double U” heat exchanger

USB Function

Convenient program upgrade
No need to carry any other heavy equipments but only USB can realize program upgrade of indoor unit and outdoor unit.

7 Levels of energy saving

For projects with temporary electricity supply restrictions, the outdoor unit supports 7 levels of energy management which can be set to output 40-100% capacity. It prevents tripping during electricity supply restriction conditions and remains system continue to operate.

Weather Temperature Curve

With the help of Weather temperature curve function, water temperature will automatically change as outside air temperature changes. When outdoor air temperature increases/decreases, the heating load will decrease/increase and water temperature will decrease/increase automatically. When outdoor air temperature decreases/increases, the cooling load will decrease/increase and water temperature will increase/decrease automatically.

Remote alarm, on/off control, cooling/heating control.

One-touch Water Temperature Switching

For cooling and heating mode, different water temperatures can be switched just by one-touch.

Anti-Corrosion Protection

Outdoor units are given anti-corrosion treatment for non-extreme conditions as standard and can also be customized with heavy anti-corrosion treatment on main components for surface protection against corrosive air, acid rain and saline air (for installations in coastal regions) to extend machine life span. The integrity of the anti-corrosion treatment is ensured by subjecting major components and parts to salt mist testing, moisture and heating testing and light aging testing.