part 1 r410a v4+ genaral information 380~415v,50hz,3n (combinable)

Download Part 1 R410A V4+ Genaral Information 380~415V,50Hz,3N (Combinable)

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  • MCAC-VTSM-2011-09 R410a DC Inverter V4 Plus 50Hz

    General Information 1

    Part 1 General Information

    1. MDV Product Development History ............................... 2

    2. DC Inverter V4+ Introduction ......................................... 2

    3. Model lineup .................................................................. 10

    4. Outdoor Unit Combination ........................................... 11

    5. Capacity Range of Indoor Units . ................................. 12

    6. Indoor Units Apperance ................................................ 12

    7. Nomenclature ................................................................ 14

  • R410a DC Inverter V4 Plus 50Hz MCAC-VTSM-2011-09

    General Information 2

    1. MDV Product Development History

    In 1999, Midea cooperated with Toshiba, produced the No.1 AC Inverter VRF MDV.

    In 2001, MIdea produced the No1. MDV in Air-conditioning industry.

    In 2002, Midea developed the No.1 AC Inverter VRF MDV, and the No1. D series MDV in China.

    In 2003, Midea completed the 2nd

    D series and 2nd

    V series MDV.

    In 2005, Midea cooperated with Hitachi, produced the No.1 modules AC Inverter V3 and digital scroll D3.

    In 2005, Midea cooperated with IR Company, founded united lab.

    In 2008, Midea launched out the MDV4, which is the R410A DC Inverter VRF and Modular design also.

    In 2010, the new MDV4+ was on sale, which owns the entirely DC Inverter technology and new low noise


    2. DC Inverter V4+ Introduction

    2.1 Free combination, The Worlds Largest Capacity 64HP

    V4+ achieved worlds largest capacity of 64HP by combining maximum 4 outdoor units with 5 different

    capacities. (8, 10, 12, 14 and 16HP), and 64 indoor units can be connected max..

    2.2 High efficiency and Energy-saving:

    V4+ realized the industry's top class energy efficiency with cooling and heating COP by adoption of Brushless

    Reluctance DC compressor controlDC Fan motor and improved heat exchanger performance with a new


    2.2.1 High efficiency DC inverter compressor, saving power 25%

    The AC load ratio of building is 30%-75%,the area is 55%, most of the AC runs in the mid load, so the mid

    load operation ratio control the whole year AC running charge.

    Centralizing winding Distributing winding

  • MCAC-VTSM-2011-09 R410a DC Inverter V4 Plus 50Hz

    General Information 3

    Smooth sine wave DC Inverter

    Motor uses 180 sine wave vector drive technology to ensure transducer to output smooth curve, which

    show motor rotor speed to run smooth. While, common frequency motor outputs sawtooth wave not to

    precisely show motor speed, so its efficiency is low.

    Common sawtooth wave Sine Wave DC inverter

    2.2.2 High efficiency DC Fan motor, saving power 50%

    According to the running load and pressure, it controls the speed of DC fun to achieve the min. energy

    consume, to reach the best effect.

    Used across entire range of models (from 8 to 64 HP).

    Efficiency improvement by up to 45% especially at low speed

    Pressure sensor DC Fan motor

    High Pressure

  • R410a DC Inverter V4 Plus 50Hz MCAC-VTSM-2011-09

    General Information 4

    Motor rotor speed waves among 5r, and can rapidly match DC Inverter Compressor to output, and

    enhance efficiency in part load.

    2.2.3 Optimize heat exchange design, Heat exchange efficiency increase 10%

    Optimized Heat-exchanger structure and material by CFD simulation and in part load V4+ outdoor unit

    owns 100% exchanger using ratio. By adoption of Pressure Sensor, EXV, and DC fan motor, V4+ has an

    obvious improvement on efficiency than previous products.

    2.3 More flexible design

    2.3.1 External static pressure enhanced up to 81.8Pa and air volume increase 10%.

    Applied high static pressure propeller fan and the optimum fan guard for high external static pressure, to

    respond to a range of various installation environments.

    Midea now offers up to 81.8Pa (10 mm H2O) external static pressure specification as an option, just needs

    On-site adjustment) to meet the requirements of veranda installation.

    * Customization is required.

    2.3.2 More options of Indoor units and high capacity connection

    Lineup of heat pump types is 8 to 64 HP. Indoor units consist of 15 types with a total of 106 models (not including

    Outdoor Air Processing Units), capacity ranges from 1.8kW to 28kW. A maximum 130% indoor units connective

    ratio is allowed for all outdoor unit capacities. This wide selection of models makes it possible to build a system that

    suits the customers requirements.

    2.4 High Comfort

    2.4.1 Optional outdoor units Silent Mode control

    Night silent operation will be activated X (6, 8) hours after the peak temperature during daytime, and it will get

    back to normal operation after Y (8,10,12) hours. To run in low speed, low noise, min. 46.8dB (A)

  • MCAC-VTSM-2011-09 R410a DC Inverter V4 Plus 50Hz

    General Information 5

    2.4.2 More Options for outdoor units

    High static pressure mode, 0 static pressure mode (default), silence mode in night mode, silence mode,

    super silence mode, and capacity priority mode

    2.4.3 Optimized fan pass design, Enhanced outlet static pressure technology

    Increase the static pressure and decrease the loss of pressure. Decrease the input and decrease the noise

    level. Take 16HP for example.

  • R410a DC Inverter V4 Plus 50Hz MCAC-VTSM-2011-09

    General Information 6

    New designed fan outlet grill

    New designed fan impeller Conventional Fan impeller

    2.5 High Reliability

    2.5.1 Alternative Cycle Duty operation of outdoor units

    MDV4+ intelligent control, according to the system load, cyclically changes start-up sequence of multiple outdoor

    units, equalizes compressor duty and extends operation life-span.

    Take 48HP system for example.

    2.5.2 Back-Up operation function

    In the event of an outdoor unit fail, the field set back-up function in the outdoor unit in question (also between

    different outdoor units) will allow emergency operation of another outdoor unit, in order to maintain the interim


    2.5.3 Dynamic gas balance technology

    Dynamic vector balance tech., no need to install gas balance pipe:

    High-precision pressure sensor monitors the system pressure on time and transfers the data to master unit

    Master unit sends the pressure date to every unit and make sure each outdoor unit in balance situation.

    Slave 1 ODU failed,

    Stops running. Slave

    takes the duty

    Everytime after


    or restart, ODU will

    start in different


  • MCAC-VTSM-2011-09 R410a DC Inverter V4 Plus 50Hz

    General Information 7

    2.5.4 High efficiency oil balance technology

    2.10.1 Oil balance pipes set among the modules, and individual oil balance vector control ensures oil

    distribution among the modules to compressor smooth and reliable running. When one compressors oil is

    overfull, oil balance pipes and outlet pipes both send the oil to system, and then system in average

    distributes the oil to the other compressors.

    Oil balance diagram

    Adopts high efficient centrifugal-type oil separator, which separate the oil from discharged refrigerant with up to 99% effect to make all the lubricant discharged from compressor can be returned in time.

    New designed low pressure liquid receiver with

    high efficiency of oil-return effect.

    Oil balance ensures sufficient refrigerant lubricant

    supply. Elaborately designed oil-return hole, which

    ensure reliable oil-return for every compressor.

    2.5.5 Oil return technology

    Centrifugal oil separator can be up to over 99% separating efficiency, which in time and efficiently send the

    oil to compressors to ensure compressor oil volume.

    System auto back oil design can complete through PC core send oil back instruction by system running

    time and state.

    The accumulator is large volume design, which can more save refrigerant to avoid liquid strike.

    Multi back oil holes can ensure compressor smooth back oil.

    2.5.6 Intelligent soft start technology, rapidly enhance refrigerant cycle volume

    Compressor soft start complete low frequency and low current start by DC Inv. compressor, and to reduce

    strike to electric network. When start DC Inv. Compressor, system runs in large volume and offer more

    Oil even pipe I

    From evaporator



    Oil separator

    Oil even pipe II

    Oil balance pipe

    between modules






    Refrigerant flow direction

    Suction pipe

    Oil basin

    Oil even pipe

    Discharge pipe

    Suction pipe

  • R410a DC Inverter V4 Plus 50Hz MCAC-VTSM-2011-09

    General Information 8

    heating capacity. And use the start rapidly advantage of fixed frequency compressor to quickly up to output


    Compressor soft start