Midea MV8M-120WV2RN1 Dimension Guide

MV8M-120WV2RN1
MV8M-140WV2RN1
MV8M-160WV2RN1
Engineering Data
Commercial Air Conditioners
R410A
380-415V 3N 50Hz
Series VRF

V8 Mini R410A VRF 50Hz
1
CONTENTS
Part 1 General Information ........................................................................3
Part 2 Outdoor Unit Engineering Date....................................................18
Part 3 System Design and Installation ....................................................58

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Midea V8 Mini Series Engineering Data

V8 Mini R410A VRF 50Hz
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Part 1 - General Information
Part 1
General Information
1 Indoor and Outdoor Unit Capacities........................................................... 4
2 External Appearance.................................................................................. 6
3 Nomenclature............................................................................................ 8
4 Combination Ratio................................................................................... 11
5 Selection Procedure................................................................................. 13

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Midea V8 Mini R410A Series Engineering Data Book
1Indoor and Outdoor Unit Capacities
1.1 Indoor Units
1.1.1 Standard indoor units
Table 1-1.1: Standard indoor unit abbreviation codes
Abbreviation
code
Type
Abbreviation
code
Type
Q1
One-way Cassette
T1
High Static Pressure Duct
Q2
Two-way Cassette
G
Wall-mounted
Q4C
Compact Four-way Cassette
DL
Ceiling & Floor
Q4
Four-way Cassette
F
Floor Standing (Exposed/Concealed)
T3
Arc Duct
FS
Floor Standing
T2
Medium Static Pressure Duct
Table 1-1.2: Standard indoor unit capacity range
Capacity
Capacity
index
Q1
Q2
Q4C
Q4
T3
T2
T1
G
DL
F
FS
kW
HP
1.5
0.5
15
—
—
15
—
15
15
—
—
—
—
—
1.8
0.6
18
18
—
—
—
—
—
—
—
—
—
—
2.2
0.8
22
22
22
22
—
22
22
—
22
—
22
—
2.8
1
28
28
28
28
28
28
28
—
28
—
28
—
3.6
1.25
36
36
36
36
36
36
36
—
36
36
36
—
4.5
1.6
45
45
45
45
45
45
45
—
45
45
45
—
5.6
2
56
56
56
56
56
56
56
—
56
56
56
—
6.3
2.25
63
—
—
63
—
—
—
—
—
—
—
—
7.1
2.5
71
71
71
—
71
71
71
71
71
71
71
—
8.0
3
80
—
—
—
80
80
80
80
80
80
80
—
9.0
3.2
90
—
—
—
90
90
90
90
90
90
—
—
10.0
3.6
100
—
—
—
100
100
—
—
—
—
—
—
11.2
4
112
—
—
—
112
112
112
112
—
112
—
—
12.5
4.5
125
—
—
—
—
—
125
—
—
—
—
—
14.0
5
140
—
—
—
140
—
140
140
—
140
—
—
16.0
6
160
—
—
—
160
—
160
160
—
160
—
—
1.1.2 Fresh air processing unit
Table 1-1.3: Fresh air processing unit capacity range
Capacity
11.2kW
12.5kW
14kW
Capacity index
112
125
140
1.2 Heat recovery ventilator
Table 1-1.4: Heat recovery ventilator capacity range
Airflow rate
200m3/h
300m3/h
400m3/h
500m3/h
800m3/h
1000m3/h
1500m3/h
2000m3/h

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Part 1 - General Information
1.3 Outdoor Units
Table 1-1.5: Outdoor unit capacity range
Capacity(kW)
Model Name
12.3
MV8M-120WV2RN1
14.0
MV8M-140WV2RN1
15.5
MV8M-160WV2RN1

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Midea V8 Mini R410A Series Engineering Data Book
2External Appearance
2.1 Indoor Units
2.1.1 Standard indoor units
Table 1-2.1: Standard indoor unit appearance
One-way Cassette
Two-way Cassette
Q1
Q2
Compact Four-way Cassette
Four-way Cassette
Q4C
Q4
Arc Duct
Medium Static Pressure Duct
T3
T2
High Static Pressure Duct
Floor Standing
T1
FS
Wall-mounted
Ceiling & Floor
G
DL
Floor Standing
F
2.1.2 Fresh air processing unit
Table 1-2.2: Fresh air processing unit appearance
Fresh Air Processing Unit
Small Airflow Rate Fresh Air Processing Unit
FA
FA
2.2 Heat Recovery Ventilator
Table 1-2.3: Heat recovery ventilator appearance
Heat Recovery Ventilator

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Part 1 - General Information
2.3 Outdoor Units
Table 1-2.4: outdoor unit appearance
120/140/160 model

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Midea V8 Mini R410A Series Engineering Data Book
3Nomenclature
3.1 Indoor Units
3.1.1 Standard indoor units
V8 indoor units
M
I
H
18
Q1
N18
○
1
○
2
○
3
○
4
○
5
○
7
Legend
No.
Code
Remarks
1
M
Midea
2
I
VRF indoor unit
3
H
Function code
H: HyperLink function
4
18
Capacity index (the capacity in kW multiplied by 10)
5
Q1
Indoor unit type
Q1: One-way Cassette
Q2: Two-way Cassette
Q4C: Compact Four-way Cassette
Q4: Four-way Cassette
T3: Arc Duct
T2: Medium Static Pressure Duct
T1: High Static Pressure Duct
G: Wall-mounted
DL: Ceiling & Floor
F: Floor Standing (Exposed/Concealed)
FS: Floor Standing
6
-
Power supply
Omit: 1 phase, 220-240V, 50Hz
H: 1 phase, 220-240V, 50/60Hz
7
N18
Refrigerant type (N18: R410A&R32)

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Part 1 - General Information
DC Indoor Units
M
I
2
-
22
Q1
D
N1
○
1
○
2
○
3
○
4
○
5
○
6
○
8
Legend
No.
Code
Remarks
1
M
Midea
2
I
VRF indoor unit
3
2
Generation code
2: The 2nd generation
3: The 3rd generation
4
22
Capacity index (the capacity in kW multiplied by 10)
5
Q1
Indoor unit type
Q1: One-way Cassette
Q2: Two-way Cassette
Q4C: Compact Four-way Cassette
Q4: Four-way Cassette
T2: Medium Static Pressure Duct
T1: High Static Pressure Duct
G: Wall-mounted
DL: Ceiling & Floor
F: Floor Standing
6
D
Series category (D: DC series)
7
-
Power supply
Omit: 1 phase, 220-240V, 50Hz
H: 1 phase, 220-240V, 50/60Hz
8
N1
Refrigerant type (N1: R410A)
AC indoor units
MDV -
D
18
-
Q4 /
N1
E
(B)
○
1
○
2
○
3
○
4
○
5
○
6
○
7
Legend
No.
Code
Remarks
1
MDV
Midea
2
D
VRF indoor unit
3
18
Capacity index (the capacity in kW multiplied by 10)
4
Q1
Indoor unit type
Q1: One-way Cassette
Q2: Two-way Cassette
Q4C: Compact Four-way Cassette
Q4: Four-way Cassette
T2: Medium Static Pressure Duct
T1: High Static Pressure Duct
G: Wall-mounted
DL: Ceiling & Floor
F: Floor Standing
5
N1
Refrigerant N1: R410A
6
E
Design Code
7
(B)
Second Generation

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Midea V8 Mini R410A Series Engineering Data Book
3.1.2 Fresh air processing unit
M
I
2
-
140
FA
D
N1
-
S
○
1
○
2
○
3
○
4
○
5
○
6
○
8
⑨
Legend
No.
Code
Remarks
1
M
Midea
2
I
VRF indoor unit
3
2
The 2nd generation VRF DC indoor unit
4
140
Capacity index (the capacity in kW multiplied by 10)
5
FA
Indoor unit type
FA: Fresh Air Processing Unit
6
D
Series category (D: DC series)
7
-
Power supply
Omit: 1 phase, 220-240V, 50Hz
H: 1 phase, 220-240V, 50/60Hz
8
N1
Refrigerant type (N1: R410A)
9
S
Product series
S: Small Airflow Rate
3.1.3 Heat recovery ventilator
AC Series
HRV
-
200
○
1
○
2
Legend
No.
Code
Remarks
1
HRV
Heat recovery ventilator
2
200
Airflow in m3/h
DC Series
HRV
-
D
200
○
1
○
2
○
3
Legend
No.
Code
Remarks
1
HRV
Heat recovery ventilator
2
D
Series category (D: DC series)
3
200
Airflow in m3/h

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Part 1 - General Information
3.2 Outdoor Units
M
V8
M
-
140
W
V2
R
N1
①
②
③
③
④
⑤
⑥
⑦
Legend
No.
Code
Remarks
1
M
Midea MV8M-120WV2RN1
2
V8
The 8th generation VRF
3
M
Mini VRF
3
140
Capacity index (the capacity in kW multiplied by 10)
4
W
Unit category (W: VRF outdoor unit)
5
V2
Type (V2: All DC inverter)
6
R
Power supply
G:380-415V, 3N~, 50/60Hz
R:380-415V, 3N~, 50Hz
7
N1
Refrigerant type (N1: R410A)
4Combination Ratio
Table 1-5.1: Indoor and outdoor unit combination ratio limitations
Type
Minimum
combination ratio
Maximum combination ratio
Standard indoor units only
Fresh air processing
units only
Fresh air processing units and
standard indoor units together
V8 Series outdoor
units
50%
130%2or 160%2
100%
100%4
Notes:
1. All the indoor units connected should be indoor units with ø5mm size copper tube heater exchanger. This limitation is to avoid too big indoor unit
exchanger cause reliability and performance problem.
2. If all indoor units in system are V8 Series the total combination ratio must not exceed 160%. If there are non V8 series indoor units in system the total
combination ratio must not exceed 130%
3. Piping between farthest indoor unit and first indoor branch joint should less than 40m.
4. When fresh air processing units are installed together with standard indoor units, the total capacity of the fresh air processing units must not exceed 30%
of the total capacity of the outdoor units and the total combination ratio must not exceed 100%.
Combination ratio =
Sum of capacity indexes of the indoor units
Capacity index of the outdoor units

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Midea V8 Mini R410A Series Engineering Data Book
Table 1-5.2: Combinations of indoor and outdoor units
Outdoor unit
capacity
Sum of capacity indexes of
connected indoor units
(standard indoor units only)
Sum of capacity indexes of connected indoor
units (fresh air processing units and standard
indoor units together)
Maximum number of
connected indoor
units
model
Capacity
index
120
123
61.5 to 159.9
61.5 to 123
8
140
140
70 to 182
70 to 140
10
160
155
77.5 to 201.5
77.5 to 155
11

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Part 1 - General Information
5Selection Procedure
5.1 Procedure
Step 1: Establish design conditions
Step 2: Select indoor units
Step 3: Select outdoor units
Notes:
1. If the indoor design temperature falls between two temperatures listed in the indoor unit's capacity table, calculate the corrected capacity by interpolation.
If the indoor unit selection is to be based on total heat load and sensible heat load, select indoor units which satisfy not only the total heat load
requirements of each room but also the sensible heat load requirements of each room. As with total heat capacity, the sensible heat capacity of indoor
units should be corrected for indoor temperature, interpolating where necessary. For the indoor unit capacity tables, refer to the indoor unit technical
manuals.
Yes
Design temperature and humidity (indoor and outdoor)
Required heat load of each room
System peak load
Piping length, level differences
Indoor unit specifications (type and quantity)
Decide indoor unit safety factor
Select indoor unit models ensuring that:
Indoor unit capacity corrected for indoor air temperature WB1 ≥ Required heat load × Indoor unit safety factor
Determine required total heat load on outdoor units
Use the sum of the peak load of each room
Use the system peak load
Provisionally select outdoor unit capacity based on combination ratio limitations
Confirm that the number of indoor units connected to the outdoor units is within limitation
Correct cooling and heating capacities of the outdoor units for the following items:
Outdoor air temperature / Indoor air temperature WB / Combination ratio / Piping length, level
difference / Piping heat loss / Frost accumulation (for heating capacity only)
Is corrected outdoor unit capacity ≥ Required total heat load on outdoor units?
VRF system selection is complete
No

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Midea V8 Mini R410A Series Engineering Data Book
5.2 Example
The following is a selection example based on total heat load for cooling.
Figure 1-5.1: Room plan
Room A
Room B
Room C
Room D
Step 1: Establish design conditions
Indoor air temperature 25°C DB, 18°C WB; outdoor air temperature 33°C DB.
Determine peak load of each room and system peak load. As shown in Table 1-5.1, the system peak load is 10.5kW.
Table 1-5.1: Required heat load of each room (kW)
Time
Room A
Room B
Room C
Room D
Total
9:00
2.5
1.6
1.6
1.6
7.3
12:00
3.2
2.4
2.4
2.4
10.4
14:00
3.1
2.4
2.4
2.6
10.5
16:00
3.1
2.3
2.3
2.3
10
The maximum piping lengths and level differences in this example are as given in Figure 1-5.2.
Figure 1-5.2: System diagram
Indoor unit type for all rooms: Medium Static Pressure Duct (T2).
Step 2: Select indoor units
In this example, a safety factor is not used (i.e. the safety factor is 1).
Select indoor unit models using the medium static pressure duct cooling capacity table. Each indoor unit's corrected
capacity needs to be greater than or equal to the peak load of the relevant room. The selected indoor units are shown
in Table 1-5.3.
Equivalent length of piping 20m
Level
difference
10m
Outdoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit

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Part 1 - General Information
Table 1-5.2: Extract from medium static pressure duct (T2) cooling capacity table
Model
Capacity
index
Indoor air temperature
14°C WB
16°C WB
18°C WB
19°C WB
20°C WB
22°C WB
24°C WB
20°C DB
23°C DB
26°C DB
27°C DB
28°C DB
30°C DB
32°C DB
TC
SC
TC
SC
TC
SC
TC
SC
TC
SC
TC
SC
TC
SC
T2
22
1.5
1.4
1.8
1.5
2.1
1.6
2.2
1.6
2.3
1.7
2.4
1.5
2.4
1.5
28
1.9
1.7
2.3
1.9
2.6
2.1
2.8
2.1
3.0
2.1
3.1
2.0
3.1
1.9
36
2.5
2.1
2.9
2.3
3.4
2.5
3.6
2.6
3.8
2.7
4.2
2.8
3.9
2.3
45
3.1
2.6
3.7
2.8
4.2
3.1
4.5
3.2
4.8
3.2
4.9
3.1
5.1
2.9
56
3.9
3.0
4.6
3.3
5.3
3.6
5.6
3.7
5.9
3.8
6.2
3.7
6.2
3.4
71
4.9
3.9
5.8
4.3
6.7
4.7
7.1
4.9
7.5
4.8
7.8
4.6
7.8
4.3
80
5.5
4.4
6.6
4.9
7.5
5.3
8.0
5.5
8.4
5.5
8.8
5.2
8.8
4.8
90
6.2
5.3
7.3
5.8
8.4
6.3
9.0
6.4
9.6
6.5
9.9
6.1
9.9
5.7
112
7.7
6.4
9.1
7.1
10.5
7.7
11.2
7.8
11.9
8.1
12.5
7.8
12.5
7.4
140
9.7
7.8
11.3
8.6
13.2
9.6
14.0
9.8
14.8
9.8
15.7
9.7
15.4
8.8
Abbreviations:
TC: Total capacity (kW); SC: Sensible capacity (kW)
Table 1-5.3: Selected indoor units
Room A
Room B
Room C
Room D
Peak heat load (kW)
3.1
2.4
2.4
2.6
Selected indoor unit
MI2-36T2DHN1
MI2-28T2DHN1
MI2-28T2DHN1
MI2-28T2DHN1
Corrected TC (kW)
3.6
2.8
2.8
2.8
Step 3: Select outdoor units
Determine the required total heat load from the indoor units to the outdoor unit based on either the sum of the peak
loads of each room or the system peak load. In this example, it is determined based on the system peak load.
Therefore, the required heat load is 10.5kW.
Provisionally select an outdoor unit using the sum of the capacity indexes (CIs) of the selected indoor units (as shown
in Table 1-5.4), ensuring that the combination ratio is between 45% and 130%. Refer to Table 1-5.5. As the sum of CIs
of the indoor units is 120, all outdoor units are potentially suitable except 8kW. Start from the smaller, which is the
10.5kW unit.
Table 1-5.4: Sum of indoor unit capacity indexes
Model
Capacity Index
No. of units
MI2-28T2DHN1
36
1
MI2-22T2DHN1
28
3
Sum of CIs
120

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Midea V8 Mini R410A Series Engineering Data Book
Table 1-5.5: Combinations of Indoor and outdoor units
Outdoor unit
capacity
Sum of capacity indexes of
connected indoor units
(standard indoor units only)
model
Capacity
index
120
123
61.5 to 159.9
140
140
70 to 182
160
155
77.5 to 201.5
The number of connected indoor units is 4 and the maximum number of connected indoor units on the 120 model
outdoor unit is 8, so the number of connected indoor units is within the limitation.
Calculate the corrected capacity of the outdoor unit:
a) The sum of the indoor unit CIs is 120 and the CI of the 120 model outdoor unit is 123, so the combination ratio is
120 / 123 = 97.5%.
b) Using the outdoor unit’s cooling capacity table, interpolate to obtain the capacity (“B”) corrected for outdoor air
temperature, indoor air temperature, and combination ratio. Refer to Tables 1-5.6 and 1-5.7.
Table 1-5.6: Extract from Table 2-8.7
MV8M-120WV2RN1 cooling capacity
Table 1-5.7: Cooling capacity calculated by
interpolation
CR
Outdoor
air
temp.
(°C DB)
Indoor air temp.
(°C DB / °C WB)
CR
Outdoor
air
temp.
(°C DB)
Indoor air temp.
(°C DB / °C WB)
25.8 / 18.0
25.8 / 18.0
TC
PI
TC
PI
kW
kW
kW
kW
100%
31
11.4
3.0
130%
33
11.4
3.3
33
11.4
3.3
35
11.4
3.5
B = 11.11
90%
31
10.2
2.6
120%
33
10.2
2.8
33
10.2
2.8
35
10.2
3.0
Notes:
1. 10.2 + (11.4 – 10.2) × (97.5– 90) / (100 – 90) =11.1

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Part 1 - General Information
c) Find the correction factor for piping length and level difference (“K1”)
Figure 1-5.3: Mini rate of change in cooling capacity
Notes:
1. The horizontal axis shows equivalent length of piping between farthest indoor unit and first outdoor branch
joint; the vertical axis shows the largest level difference between indoor unit and outdoor unit. For level
differences, positive values indicate that the outdoor unit is above the indoor unit, negative values indicate
that the outdoor unit is below the indoor unit.
d) Calculate the corrected capacity of MV8M-120WV2RN1 (“C”) by using K1:
C = B × K1 = 11.1 × 0.99= 10.99kW
The corrected capacity 10.99kW is larger than required total heat load 10.5kW, so selection is complete. (In the event
that the corrected capacity is lower than the required total heat load, Step 3 should be repeated from the point
where the outdoor unit capacity is provisionally selected.)

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Midea V8 Mini Series Engineering Data Book
Part 2
Outdoor Unit
Engineering Data
1 Specifications........................................................................................... 19
2 Dimensions.............................................................................................. 20
3 Installation Space Requirements.............................................................. 21
4 Piping Diagrams....................................................................................... 22
5 Wiring Diagrams ...................................................................................... 24
6 Electrical Characteristics .......................................................................... 26
7 Functional Components and Safety Devices............................................. 27
8 Capacity Tables ........................................................................................ 28
9 Operating Limits ...................................................................................... 54
10 Sound Levels.......................................................................................... 55
11 Accessories ............................................................................................ 57