Water Cooled MRV

Central Air Conditioner Solution Water Cooling

Principle of operation

• • VRV cools water similar to conventional air cooling on the cooling side with gas refrigerant from the outdoor unit to the indoor units. But on the outdoor unit side for cooling, instead of air cooling, the outdoor units will be closed and cooled through water by the cooling tower and water pump. The cooling water will be pumped and transported to the cooling tower located outdoors. This also makes the layout of the outdoor unit easier for large projects or high-rise hotels.

Types of buildings suitable for application

• • New construction or renovation: MRV W provides an energy-efficient solution for any place where a water chiller can be used or a water source heat pump design can be replaced, helping them to take advantage of the benefits of a water chiller. This is especially true for high-rise buildings such as apartments, offices, medical centers, schools.
  • High-rise buildings are not designed with air-cooled VRF systems.
  • The building is designed with an all-glass façade or a building with a special design.
  • The building does not have enough space to accommodate outdoor units, even when the VRF system is included.
  • Projects that need to use renewable energy sources

Benefits of using the MRV W system for water cooling

• • Reduce initial costs for developers and contractors
  • Customers or investors can install additional air conditioners to meet the demand for electricity load
  • There is no need to rebalance the water system if dampers are installed on each floor.
  • Connect to the comprehensive MRV control solution suite of the air conditioning management system.
  • Each indoor indoor unit has a separate control system.

Step-explosive characteristics of Haier’s water-cooled MRV W system

 

 

• • All models are equipped with Mitshunishi Electric EVI (Enhanced Vapor Injection) inverter DC compressor, which has a built-in check valve, which improves EER performance by 5% when operating at low frequencies.

    

  • Integrated with an electronic control circuit board, which is directly cooled by refrigerant, the inverter control system is designed using high-performance vector control technology without position sensors, capable of achieving a control accuracy of up to 0.01 rps, thereby making the operation process more stable.

    
    

  • The maximum capacity for a single module is 12HP

    

 

• • Using space link technology: electronic throttle control (EXV) function in case of power failure, Flexible wiring method, Communication Protocol 1192, Simple indoor unit address (IDU) setting

    

 

• • Refrigerant cooling technology: Haier’s new design uses refrigerant directly to cool the control module, this solution reduces the temperature of the control module by 8°C, ensuring stable operation of the device even under high ambient temperatures of up to 55°C.

    

  • Low noise: the fanless design system in the outdoor unit along with the fully insulated design, the noise level can be reduced to only 50dB(A), which is much lower than conventional air-cooled and air-conditioning systems.
    
  • Self-refrigerant filling: Advanced automatic refrigerant filling technology intelligently determines the optimal refill based on the operating parameters of indoor and outdoor units. This allows the system to operate automatically without direct supervision, resulting in significant manpower savings.

    

  • Automatic refrigerant recovery: when the indoor unit has a problem, the refrigerant can be recovered to the outdoor unit. When the outdoor unit has a problem, the refrigerant can be recovered to both the indoor unit and the outdoor units that are in operation. These two methods of refrigerant recovery make maintenance simpler and more efficient.

    

  • The outdoor unit has built-in Bluetooth, providing smart and convenient Bluetooth services. The device can be connected directly to mobile devices. Allows real-time monitoring of parameters; Records, downloads, and prints parameter data; Fault list and quick troubleshooting instructions; Installation checklist; Commissioning report; Parameter setting in the field
  • Self-cleaning system: Switch the cleaning mode between the indoor unit and the outdoor unit without interrupting the operation, making full use of the waste heat from the outdoor unit to defrost the indoor unit. At the same time, the indoor unit uses the waste heat from the outdoor unit to defrost the heat exchanger and dry the condensate, which effectively prevents the growth of mold (applicable to the entire product line).
  • VRA Technology: The cooling capacity is adjusted according to the outside ambient temperature. VRA technology performs the correction of the evaporation temperature of the current mode to improve energy efficiency.
  • Wide voltage operating range from 310V-460V
  • The maximum pipe length is 300m, the maximum height between outdoor and cold units is 50m, the maximum length of the cooling water pipe is 200m, the maximum water pressure is 1.96MPa.
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MRV W Hot/Cold Outdoor Unit, model AVxxIMWEWLA

• • The MRVW product line has 3 series of single module air conditioners 8HP, 10HP, 12HP and can be combined up to 48HP
  • Outdoor Unit Dimensions (W x D x H) 775x545x995mm
  • Power supply: 3 phase/ 380-415V/50 or 60Hz
  • The 8HP series EER/COP is 4.98/6.02, the 10HP is 4.67/5.43, and the 12HP is 4.35/4.81