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  • MCAC-VTSM-2014-04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz

    General Information 1

    Part 1 General Information 1. Product lineup ........................................................................................... 2

    2. Nomenclature ........................................................................................... 3

    3. Features ................................................................................................... 4

    4. Indoor units lineup .................................................................................... 9

  • MCAC-VTSM-2014-04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz

    2 General Information

    1. Product lineup

    380-415V/3Ph/50Hz

    Model name External appearance

    MDV-730W/DRN1-i(C)

    MDV-785W/DRN1-i(C)

    MDV-850W/DRN1-i(C)

    MDV-900W/DRN1-i(C)

    Outdoor units basic information

    Model Net dimension

    W×H×D (mm)

    Net/Gross

    weight (kg)

    Max. quantity of

    connectable indoor units

    MDV-730W/DRN1-i(C) 2540×1615×765 555/590 43

    MDV-785W/DRN1-i(C) 2540×1615×765 555/590 46

    MDV-850W/DRN1-i(C) 2540×1615×765 600/635 50

    MDV-900W/DRN1-i(C) 2540×1615×765 600/635 53

  • MCAC-VTSM-2014-04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz

    General Information 3

    2. Nomenclature

    MDV – 730 W / D R N1 – i (C)

    Series code

    i: Individual type

    Refrigerant type

    N1: R410A

    Power supply

    R: 380-415V, 3Ph, 50Hz

    D: DC inverter type

    W: Outdoor units

    Cooling capacity (×100W)

    Midea

  • MCAC-VTSM-2014-04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz

    4 General Information

    3. Features

    Wide application range

    3.1.1 Wide capacity range

    The whole product lineup of V4+I series will be from 7HP to 32HP, which is designed to optimize performance

    and better match varieties of application requirement. Especially, the integrated designed V4+I series is focus

    on providing better air conditioning system solution for the small and middle-sized buildings in the global

    market.

    3.1.2 Flexible indoor units connection

    3.1.3 Wide operation range

    3.1.4 Flexible piping design

    M a

    x im

    u m

    a c tu

    a l p

    ip in

    g l e

    n g

    th 1

    6 5

    m

    T h

    e f

    ir s t

    b ra

    n c h

    j o

    in t

    to t

    h e

    fa rt

    h e

    s t

    ID U

    9 0

    m

    L e

    v e

    l d

    if fe

    re n

    c e

    b e

    tw e

    e n

    I D

    U

    a n

    d O

    D U

    9 0

    m

    L e

    v e

    l d

    if fe

    re n

    c e

    b e

    tw e

    e n

    I D

    U s 3

    0 m

    Ou t door T e m pera t u re

    0 1 0 2 0 3 0 4 0 5 0 - 1 0 - 2 0

    C OO L I N G M O D E

    H E A T I N G M O D E

    Outdoor temp. °C(D.B.)

    48°C

    24°C -15°C

    -5°C Ou t door T e m pera t u re

    A 32HP outdoor unit supports up to 53 indoor units, freeing up

    considerable space outside, use your backyard more wisely with much

    more space available created by less number of outdoor units.

     Maximum 53 indoor units for a 32HP outdoor units installation

     Maximum 50 indoor units for a 30HP outdoor units installation

     Maximum 46 indoor units for a 28HP outdoor units installation

     Maximum 43 indoor units for a 26HP outdoor units installation

    V4+I series offers an extended piping length of 165m (190m

    equivalent piping length) with a total system piping length of

    1,000m.

    In case the outdoor unit is located above the indoor unit the height

    difference between outdoor unit and indoor unit is up to 50m.

    In case the outdoor unit is located below the indoor unit the height

    difference between outdoor unit and indoor unit is up to 90m.

    The longest piping length is 40m standard. It can be extended to

    90m*.

    *For more information, please contact your local Midea dealer.

    The V4+I series system operates

    stably at extreme temperatures

    ranging from minus 15°C to 48°C.

  • MCAC-VTSM-2014-04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz

    General Information 5

    3.1.5 High external static pressure

    3.2 High efficiency

    3.2.1 High efficiency DC inverter compressor

    High efficiency DC inverter compressor reduces power consumption by 25%.

    3.2.2 High efficiency DC motor

    According to the running load and pressure, it controls the speed of DC fan to achieve the minimum power

    consumption.

    3.2.3 High efficiency heat exchanger

    The new designed window fins enlarge the heat-exchanging area, decrease the air resistance, save more

    power and enhance heat exchange performance.

    Hydrophilic film fins and inner-threaded copper pipes optimize heat exchange efficiency.

    40 Pa

    20

    40

    60

    80

    100

    200 1000

    45%

    New structure enhanced mid-frequency performance Special designed scroll profile for R410A More compact, weight reduced by 50% Advanced permanent magnet DC motor improves low-frequency band performance

    Motor speed (RPM)

    E ff ic

    ie n c y (

    % ) AC motor

    DC motor

    New design Original design

    Hydrophilic film fins + inner-threaded pipes

    High efficient inner-thread pipe, enhance heat transfer

    High static pressure propeller and optimized fan guard can adapt to

    various installation environments.

    Midea now offers 40Pa* external pressure for customized

    applications. A standard 0-20Pa function is equipped by default

  • MCAC-VTSM-2014-04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz

    6 General Information

    3.3 Enhanced comfort

    3.3.1 Intelligent soft start technology

    3.3.2 Night silent operation mode

    Midea's Night Silent Mode feature which is easily set on the PCB board allows the unit to be set to

    vary time options during Non-Peak and Peak operation time optimizing the units noise output.

    Extra silent operation mode can reduce sound level further, minimum 46.8dB (A).

    Night silent operation will be activated X hours after the peak temperature during daytime, and it

    will go back to normal operation after Y hours.

    Model 1→X: 6 hours, Y: 10 hours Model 2→X: 8 hours, Y: 10 hours

    Model 3→X: 6 hours, Y: 12 hours Model 4→X: 8 hours, Y: 8 hours

    Notes:

    This function can be activated by setting at site. Temperature (load) curve shown in the graph is just an example.

    3.3.3 Intelligent defrosting raises heat capacity

    noise

    08:00

    100

    50

    14:00 22:00 08:00

    Peak value of ambient temp.

    N o

    is e

    d B

    L o

    a d

    % C

    a p

    a c

    it y

    %

    8hrs 10hrs

    Night silent Mode

    Max.-10dB(10Hp)

    8hrs 10hrs

    Night silent Mode

    Max.-10dB(10Hp)

    EndStart EndStart

    defrost

    DC inverter compressor soft start function reduces strike to the

    electric network. This kind of high-performance and low sound scroll

    compressor operates at a faster rate when starting, reducing start-up

    time. It also helps the unit to quickly adjust the room temperature to

    the set level.

  • MCAC-VTSM-2014-04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz

    General Information 7

    3.4 Easy installation and service

    3.4.1 Compact design for effective use of space

    3.4.2 Integrated design

    Comparing with combination units, the individual units needs no complicated piping and wiring in

    the jobsite. It eliminates the communication wire, power wire, oil balance pipe, and refrigerant

    distributors between units. Lessing brazing joint can optimize the installation quality and eliminated

    the possibility of moisture to get into the system.

    3.4.3 Simple signal line connection

    Installation is easier as communication wiring can be shared by indoor & outdoor units. It’s easy for the user to

    retrofit the existing system with a centralized control by simply connecting to the outdoor units.

     PQE & XYE: only one set of PQE communication wires can achieve communication among indoor units,

    outdoor units and the network.

     Reversible communication, central controller can be connected from indoor side or outdoor side.

    Easy to transport

    P Q E

    P Q E P Q E P Q E P Q E

    X Y E X Y E

    Combination units Individual units ①Power wire and grounding wire

    ②Communication wire

    ③Main gas pipe

    ④Main liquid pipe

    ⑤Power wire and grounding wire

    ⑥Communication wire

    ⑦Oil balance pipe

    Compact size and light weight design minimizes the installation

    footprint, reduces the installation floor load, and easier for