Midea VRF Operating manual

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Commercial Air Conditioner Division
Midea Group
Address: Midea Headquarters Building, 6 Midea Avenue, Beijiao, Shunde, Foshan,
Guangdong, China
Postal code: 528311
Tel: [phone] Fax: [phone]
cac.midea.com global.midea.com
Note: The data in this book may be changed without notice for further improvement on
quality and performance.
One-way Cassette
Two-way Cassette
Compact Four-way Cassette
Four-way Cassette
Silent Four-way Cassette
Series:
VRF Indoor Unit
60Hz

01 One-way Cassette
24 Two-way Cassette
41 Compact Four-way Cassette
57 Four-way Cassette
81 Silent Four-way Cassette
Contents

MCAC-VTSM-2016-05 One-way Cassette
Indoor Unit 1
One-way Cassette
1. Features ......................................................................2
2. Specifications.............................................................3
3. Dimensions.................................................................6
4. Service Spaces...........................................................8
5. Piping Diagrams.........................................................9
6. Wiring Diagrams.......................................................10
7. Capacity Tables ........................................................12
8. Electrical Characteristics ........................................18
9. Sound Levels............................................................19
10. Accessories ............................................................23

One-way Cassette MCAC-VTSM-2016-05
2 Indoor Unit
1. Features
1.1 New panel design
The new panel is equipped with digital display function, which can show temperature, warning message and
check running parameters.
1.2 Compact design
For capacity 6100~12300Btu/h(1.8~3.6kW) models, need only 6-1/32in.(153mm) space above the ceiling.
And 7-7/16in.(189mm) for 15400~24200 Btu/h (4.5~7.1kW) models.
1.3 Parts inside installation
The throttling components and water pump are internally installed which means lower cost, no extra
accessories or installation time.
1.4 Large airflow and low noise
Large airflow, for high ceiling application. Installation height can reach up to 10.5ft(3.2m) for
6100~12300Btu/h(1.8~3.6kW) models and 13.1ft(4.0m) for 15400~24200 Btu/h(4.5~7.1kW) models,
guarantees comfort in large space.
1.5 Improved air quality
Two folding type air filters and two standard formaldehyde absorption nets improve the air quality greatly.
The design of a long air outlet and a wide guide fan blade, which enlarges the range of flow transportation.
1.6 Auto swing
Auto swing mechanism guarantees even airflow distribution and a better room temperature balance.
1.7 Built-in water pump with 29-17/32in.(750mm) pump head
1.8 Prevent condensation in air outlet by the patent of a new structure design
By the adoption of this structure, the guide wing will always wrapped up by dry cold air, cutting off the contact
route of moist hot air and the cold guide wing.As a result, the water vapour in mosit hot air gets no change to
condense in the surface of guide wing.
1.9 Auto restart
When the indoor unit is powered off, it will auto restart when powered on again after 3 minutes and operate
in the previous state.

MCAC-VTSM-2016-05 One-way Cassette
Indoor Unit 3
2. Specifications
Model
MDV-D18Q1/VN1-D
MDV-D22Q1/VN1-D
Power supply
V- Ph-Hz
220-240V~1Ph~60Hz
Cooling
Capacity
kW
1.8
2.2
Btu/h
6100
7500
Input
W
41
41
Rated current
A
0.24
0.24
Heating
Capacity
kW
2.2
2.6
Btu/h
7500
8900
Input
W
41
41
Rated current
A
0.24
0.24
Indoor fan motor
Model
RPS12B
Type
AC motor
Brand
Welling
Input(H/M/L)
W
29.5/26.7/25.0
29.5/26.7/25.0
Capacitor
μF
0.8μF/450V
0.8μF/450V
Speed (H/M/L)
r/min
1180/955/710
Indoor coil
Number of rows
2
2
Tube pitch(a) ×row pitch(b)
in.(mm)
53/64×17/32(21×13.37)
53/64×17/32(21×13.37)
Fin spacing
in.(mm)
1/16(1.5)
1/16(1.5)
Fin type
Hydrophilic aluminum
Tube outside dia. and type
in.(mm)
9/32(Ф7) Inner groove tube
Coil length ×height ×width
in.(mm)
29-59/64×9-15/16×1-3/64(760×252.4×26.74)
Number of circuits
2
2
Indoor air flow (H/M/L)
m3/h
523/404/275
CFM
308/238/162
Indoor noise level (H/M/L)
dB(A)
37/34/30
38/34/30
Indoor unit
Dimension (W×H×D)
in.(mm)
41-1/2×6-1/32×16-47/64(1054×153×425)
Packing (W×H×D)
in.(mm)
45-15/32×9-41/64×19-19/64(1155×245×490)
Net/Gross weight
lbs. (kg)
27.8/35.3(12.5/16)
27.8/35.3(12.5/16)
Panel
Dimension (W×H×D)
in.(mm)
46-29/64×63/64×18-5/16(1180×25×465)
Packing (W×H×D)
in.(mm)
48-1/2×4-7/32×20-23/64(1232×107×517)
Net/Gross weight
lbs. (kg)
7.7/11.5(3.5/5.2)
7.7/11.5(3.5/5.2)
Refrigerant type
R410A
Throttle
Type
Electronic expansion valve
Model
D20MISZ-1R(L)
Design pressure(H/L)
MPa
4.4/2.6
Refrigerant piping
Liquid side
in.(mm)
1/4(Ф6.35)
Gas side
in.(mm)
1/2(Ф12.7)
Connecting wiring
Power wiring
mm2
3×1.0
Signal wiring
mm2
3×0.75
Drainage water pipe diameter
in.(mm)
OD 63/64 (Ф25)
Controller
Wireless remote controller
Notes: 1. Nominal cooling capacities are based on the following conditions: return air temperature: 27°CDB,19°CWB,
outdoor temperature:35°CDB,equivalent refrigerant piping: 8m(horizontal).
2. Nominal heating capacities are based on the following conditions: return air temperature: 20°CDB,
outdoor temperature: 7°CDB,6°CWB,equivalent refrigerant piping: 8m(horizontal)

One-way Cassette MCAC-VTSM-2016-05
4 Indoor Unit
Model
MDV-D28Q1/VN1-D
MDV-D36Q1/VN1-D
Power supply
V- Ph-Hz
220-240V~1Ph~60Hz
Cooling
Capacity
kW
2.8
3.6
Btu/h
9600
12300
Input
W
41
41
Rated current
A
0.25
0.25
Heating
Capacity
kW
3.2
4.0
Btu/h
10900
13600
Input
W
41
41
Rated current
A
0.25
0.25
Indoor fan
motor
Model
RPS12B
Type
AC motor
Brand
Welling
Input
W
31.0/27.2/25.3
31.0/27.2/25.3
Capacitor
μF
1.0μF/450V
1.0μF/450V
Speed (H/M/L)
r/min
1270/1050/790
Indoor coil
Number of rows
2
2
Tube pitch(a) ×row pitch(b)
in.(mm)
53/64×17/32(21×13.37)
53/64×17/32(21×13.37)
Fin spacing
in.(mm)
1/16(1.5)
1/16(1.5)
Fin type
Hydrophilic aluminum
Tube outside diameter and type
in.(mm)
9/32(Ф7) Inner groove tube
Coil length ×height ×width
in.(mm)
29-59/64×9-15/16×1-3/64(760×252.4×26.74)
Number of circuits
3
3
Indoor air flow (H/M/L)
m3/h
573/456/315
CFM
337/268/185
Indoor noise level (H/M/L)
dB(A)
39/37/34
40/38/34
Indoor unit
Dimension (W×H×D)
in.(mm)
41-1/2×6-1/32×16-47/64(1054×153×425)
Packing (W×H×D)
in.(mm)
45-15/32×9-41/64×19-19/64(1155×245×490)
Net/Gross weight
lbs.(kg)
28.8/ 36.4(13/16.5)
Panel
Dimension (W×H×D)
in.(mm)
46-29/64×63/64×18-5/16(1180×25×465)
Packing (W×H×D)
in.(mm)
48-1/2×4-7/32×20-23/64(1232×107×517)
Net/Gross weight
lbs.(kg)
7.7/11.5(3.5/5.2)
Refrigerant type
R410A
Throttle
Type
Electronic expansion valve
Model
D20MISZ-1R(L)
Design pressure(H/L)
MPa
4.4/2.6
Refrigerant
piping
Liquid side
in.(mm)
1/4(Ф6.35)
Gas side
in.(mm)
1/2/(Ф12.7)
Connecting
wiring
Power wiring
mm2
3×1.0
Signal wiring
mm2
3×0.75
Drainage water pipe diameter
in.(mm)
OD 63/64 (Ф25)
Controller
Wireless remote controller
Notes: 1. Nominal cooling capacities are based on the following conditions: return air temperature : 27°CDB,19°CWB,
outdoor temperature.:35°CDB,equivalent refrigerant piping: 8m(horizontal)
2. Nominal heating capacities are based on the following conditions: return air temperature: 20°CDB,
outdoor temperature: 7°CDB,6°CWB,equivalent refrigerant piping: 8m(horizontal)

MCAC-VTSM-2016-05 One-way Cassette
Indoor Unit 5
Model
MDV-D45Q1/VN1-D
MDV-D56Q1/VN1-D
MDV-D71Q1/VN1-D
power supply
V-Ph-Hz
220-240V~1Ph~60Hz
Cooling
Capacity
W
4500
5600
7100
Btu/h
15400
19100
24200
Input
W
54
60
75
Rated current
A
0.27
0.32
0.36
Heating
Capacity
W
5000
6300
8000
Btu/h
17100
21500
27300
Input
W
44
50
65
Rated current
A
0.27
0.32
0.36
Indoor fan
motor
Model
YDK38-4
YDK38-4
YDK43-4
Type
AC motor
AC motor
AC motor
Brand
Welling/ Tongde
Input
W
43.6/36.0/26.8
48.2/40.0/29.8
72.8/46.0/31.8
Capacitor
uF
2.0
3.0
3.0
Speed (h/m/l)
r/min
930/830/700
1050/930/800
1120/960/780
Indoor coil
Number of rows
2
2
2
Tube pitch(a) ×row
pitch(b)
in.(mm)
21×13.37
21×13.37
21×13.37
Fin spacing
in.(mm)
1/16(1.5)
1/16(1.5)
1/16(1.5)
Fin type
Hydrophilic Aluminum
Tube outside dia.
and type
in.(mm)
9/32(Ф7)
Inner groove tube
Coil length ×height
×width
in.(mm)
37-19/32×9-3/32×1-3/64(955×231×26.74)
37-19/32×13-15/64×1-3/64
(955×336×26.74)
Number of circuits
3
3
5
Indoor air flow (H/M/L)
m3/h
693/600/476
792/688/549
933/749/592
CFM
408/353/280
466/405/323
549/441/349
Indoor noise level (H/M/L)
dB(A)
41/39/35
42/40/36
44/41/37
Indoor unit
Dimension (W×H×D)
in.(mm)
50-13/64×7-7/16×17-23/32(1275×189×450)
Packing (W×H×D)
in.(mm)
53-15/16×11-39/64×19-7/8(1370×295×505)
Net/Gross weight
lbs.(kg)
40.8/51.1(18.5/23.2)
41.4/51.8(18.8/23.5)
43.0/53.4(19.5/24.2)
Panel
Dimension (W×H×D)
in.(mm)
53-5/32×63/64×19-7/8(1350×25×505)
Packing (W×H×D)
in.(mm)
55-33/64×3-47/64×22-3/64(1410×95×560)
Net/Gross weight
lbs.(kg)
8.8/11.9(4/5.4)
Refrigerant type
R410A
R410A
Throttle
Type
Electronic expansion valve
Model
D20MISZ-1R(L)
Design pressure (H/L)
MPa
4.4/2.6
Refrigerant
piping
Liquid side
in.(mm)
1/4 (Φ6.35)
1/2(Ф12.7)
1/2(Ф12.7)
Gas side
in.(mm)
1/2(Φ12.7)
5/8(Ф15.9)
5/8(Ф15.9)
Connecting
wiring
Power wiring
mm2
3×2.5
Signal wiring
mm2
3×0.75
0.75
Drainage water pipe dia.
in.(mm)
OD 63/64 (Ф25)
OD 63/64 (Ф25)
Controller
Wireless remote controller
Notes: 1. Nominal cooling capacities are based on the following conditions: return air temperature: 80.6℉（27°C）DB,66.2℉
（19°C）WB, outdoor temperature:95℉(35°C)DB, equivalent ref. Piping: 8m(horizontal)
2. Nominal heating capacities are based on the following conditions: return air temperature: 68℉(20°C)DB,
outdoor temperature: 44.6℉(7°C)DB,42.8℉(6°C)WB, equivalent ref. Piping: 8m(horizontal)

One-way Cassette MCAC-VTSM-2016-05
6 Indoor Unit
3. Dimensions Unit : in.(mm)
MDV-D18Q1/VN1-D MDV-D22Q1/VN1-D MDV-D28Q1/VN1-D MDV-D36Q1/VN1-D
/（
）

MCAC-VTSM-2016-05 One-way Cassette
Indoor Unit 7
MDV-D45Q1/VN1-D MDV-D56Q1/VN1-D MDV-D71Q1/VN1-D
53-5/32(1350)
41-1/2(1054)
2-3/4(70)
19-7/8(505)
8-31/32(228)
41-49/64(1061)
7-7/16(189)
63/64
(25)
45-5/8(1235)
11-13/16(300)
11-13/16(300)
45-5/8(1235)
4-11/16(119)
1-21/32(42)
2-23/32(69)
2-23/64(60)
6-11/16(170)
2-61/64
(75) 1-3/16
(30)
3-5/16(84)
2-13/64(56)
1-19/64(33)
2-1/64(51)
4-49/64(121)
17-51/64(452)
Please use the installation paper plate to make sure the position of the installation screws.
Ceiling cutting size:C
Ceiling cutting size:A
Screw fixing size:D
Please use the installation paper plate to make sure the
positions of the installation screws.
Screw fixing size:B
4×Φ10
Model
No.
18-36
45-71
A
16-59/64(430)
18-1/2(470)
B
11-27/64(290)
11-13/16(300)
C
43-5/16(1100)
50-25/32(1290)
D
39-61/64(1015)
48-5/8(1235)

One-way Cassette MCAC-VTSM-2016-05
8 Indoor Unit
4. Service Spaces
Please avoid installing in the following places :
A place with flammable gas or material.
A saline place such as a seashore vicinity.
A place with sulphur gas.
A place with oil gas, such as kitchen.
A place with high-humidity air.
An unbearable place.
A place where high-frequency waves are generated.
The appliance shall not be installed in the laundry.
Please comply with the related national electric standard to make electric insulation for construction and
metal parts of air-conditioner.
Please choose the place where the ventilation is good.
Ceiling space requires ≥C in.(mm).
The installation height of the unit cannot be higher than D in.(mm), or it will affect the operation effect.
≥C
≥B
A
≥3-15/16
(100)
C
≤D
Unit：in.(mm)
≥3-15/16
(100)
E
Fan angle range
Air return port
The air outlet can not has any barriers such as pendant lamp, folding screen etc.
Unit：in.(mm)
≥3-15/16
(100)
Unit : in.(mm)
Model
No.
18-36
45-71
A
46-29/64(1180)
53-5/32(1350)
B
54-21/64(1380)
61-1/32(1550)
C
6-1/32(153)
7-7/16(189)
D
125-63/64(3200)
157-31/64(4000)
E
18-5/16(465)
19-7/8(505)