Out Door Unit – MRV

MRV 7 Central Air Conditioning Solution

– The MRV7 is the latest generation outdoor unit developed by Haier. This Haier central air conditioner product line has the following outstanding features:

• • 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 48HP
    
  • 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.
    
  • The MRV7 platform also owns many quiet operation modes to meet the diverse needs of users
    
  • The power control function can be set through the rotary switch to adjust the output power ratio of the outdoor equipment (ODU). Users can optionally choose the power reduction between 40% and 100% to save power costs.
    
  • 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
  • Full DC motor fan: Stepless speed adjustment in the range from 0 to 91 Hz, providing 17% higher efficiency than conventional DC motors. Fan diameter for vertical blowing outdoor units: external static pressure (ESP) up to 110 Pa, axial fan diameter Φ 820 mm (the largest in the industry). For horizontal blowing outdoor units: Φ 640mm axial fan (5-12HP), reducing airflow resistance at high speeds, reducing noise by 3 decibels.
  • Gas-liquid separator: Equipped with a larger gas-liquid separator, this unit ensures the ability to meet pipe lengths of up to 1200 meters for vertical blowing hot flows and pipe lengths of up to 560 meters for horizontal blowing outdoor units.

MRV7T-H Series  Vertical Blower:

• • The MRV7T-H series (upward exhaust) includes two types: the Standard series and the Eco series. The capacity of a single module of the Standard series ranges from 8 to 48 HP, with a total combined power of up to 144 HP (allowing 3 modules to be combined in one system).
  • For the Eco series, the power of the single module ranges from 8 to 40 HP, and the total combined power reaches 120 HP (also allows 3 modules to be combined). In addition, the MRV7T-H series also has 3 different chassis sizes.
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MRV7S-H Series  Horizontal Blow

• • The power of a single module is 3–24 HP, and the combined power can be up to 96 HP. For systems with a capacity of more than 14HP, up to 4 outdoor units can be combined; for systems from 8 to 12HP, up to 2 outdoor units can be combined. The MRV7S-H series includes 4 different chassis sizes