Midea VRF V4 Plus I Series User manual

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
Maximum actual piping length 165m
The first branch joint to the farthest IDU 90m
Level difference between IDU and ODU 90m
Level difference between IDUs 30m
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)
Efficiency (%)
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.
Noise dB Load % Capacity %
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
transportation. For some projects the units can even be transported
through the elevator or forklift, lessen access problem at the jobsite.
Wireless & wired controller can query
and modify each indoor unit's address.

MCAC-VTSM-2014-04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz
8 General Information
3.4.4 Auto addressing
3.4.5 Easy maintenance
Reserved checking window on electric
control box for convenient spot checking
and status enquiry.
Compressor is located near the door, which simplifies checks
and enables valve or compressor parts to be replaced easily.
Self-diagnosis function helps service
engineers locate faults quickly and easily.
Outdoor unit can distribute address for each indoor unit
automatically.
Wireless and wired controllers can enquire and
modify each indoor unit’s address.

MCAC-VTSM-2014-04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz
General Information 9
4. Indoor units lineup
Capacity
(×100W)
Cassette type
One-way cassette
Two-way cassette
Compact four-way cassette
Four-way cassette
15
●
18
●
22
●
●
●
28
●
●
●
●
36
●
●
●
●
45
●
●
●
●
56
●
●
●
71
●
●
80
●
90
●
100
●
112
●
140
●
Capacity
(×100W)
Duct type
Low static
pressure duct
Medium static pressure duct
High static pressure duct
15
●
18
●
22
●
●
28
●
●
36
●
●
45
●
●
56
●
●
71
●
●
●
80
●
●
90
●
●
100
112
●
●
140
●
●
160
●
200
●
250
●
280
●
400
●
450
●
560
●

MCAC-VTSM-2014-04 R410A DC Inverter VRF V4 Plus Individual Series 50Hz
10 General Information
Indoor units lineup
Capacity
(×100W)
Floor-standing/Ceiling & Floor/Console
Cased floor-standing
Uncased floor-standing
Ceiling & floor
console
22
●
●
●
28
●
●
●
36
●
●
●
●
45
●
●
●
●
56
●
●
●
71
●
●
●
80
●
●
●
90
●
112
●
140
●
160
●
Capacit
y
(×100W)
Wall mounted/Fresh air processing unit
Wall mounted
(S panel)
Wall mounted
(C panel)
Wall mounted
(R panel)
Wall mounted
(D panel)
Fresh air processing unit
15
●
22
●
●
●
28
●
●
●
36
●
●
●
45
●
●
●
56
●
●
●
71
●
●
80
●
90
●
125
●
140
●
200
●
250
●
280
●
Note:
Due to continuous improvement, specifications are subject to change without prior notice.