Midea MTA-48WN1, MTA-24WN1, MTA-36WN1, MTA-60WN1, MOVTB-18N1-13C Technical & Service Manual
...
Indoor unit
MTA-18WN1
MTA-24WN1
MTA-36WN1
MTA-36WN1
MTA-48WN1
MTA-60WN1
Power supply
220-240V~ 1Ph 50Hz
220-240V~ 1Ph 50Hz
220-240V~ 1Ph 50Hz
380-415V~ 3Ph 50Hz
380-415V~ 3Ph 50Hz
380-415V~ 3Ph 50Hz
Outdoor unit
MOVTB-18N1-13C
MOVTB-24N1-13C
MOVTB-36N1-13C
MOVTB-36N1-R13C
MOVTB-48N1-R13C
MOVTB-60N1-R13C
Model:
Technical Service Manual
Split AC
Content
Part. 1 General information .............. 1
Part. 2 Indoor Unit ............................. 6
Part. 3 Outdoor Unit ........................ 48
Part. 4 Installation ........................... 67
Part. 5 Wired controller ................ 104
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
1
Part. 1 General information
1. Model Names of Indoor/Outdoor Units .................................. 2
2. External Appearance ............................................................. 2
3. Nomenclature ....................................................................... 3
4. Product features .................................................................... 4
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
2
1. Model Names of Indoor/Outdoor Units
Nominal
Capacity
Indoor unit
Outdoor unit
Model
Power supply
Model
Power supply
1.5ton
MTA-18WN1
220-240V~, 50Hz, 1Ph
MOVTB-18CN1-13C
220-240V~, 50Hz, 1Ph
2ton
MTA-24WN1
220-240V~, 50Hz, 1Ph
MOVTB-24CN1-13C
220-240V~, 50Hz, 1Ph
3ton (1Ph)
MTA-36WN1
220-240V~, 50Hz, 1Ph
MOVTB-36CN1-13C
220-240V~, 50Hz, 1Ph
3ton (3Ph)
MTA-36WN1
220-240V~, 50Hz, 1Ph
MOVTB-36CN1-R13C
380-415V~, 50Hz, 3Ph
4ton (3Ph)
MTA-48WN1
220-240V~, 50Hz, 1Ph
MOVTB-48CN1-R13C
380-415V~, 50Hz, 3Ph
5ton (3Ph)
MTA-60WN1
220-240V~, 50Hz, 1Ph
MOVTB-60CN1-R13C
380-415V~, 50Hz, 3Ph
2. External Appearance
2.1 Indoor units
MTA-18WN1
MTA-24WN1, MTA-36WN1
MTA-48WN1, MTA-60WN1
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
3
2.2 Outdoor unit
3. Nomenclature
3.1 Indoor unit:
M T A – 18 W N1
Refrigerant Type - N1: R410A
Control Type: Wired controller
Nominal Cooling Capacity (18×1,000Btu/h)
Series Number: A type
Medium Static Pressure Duct Type
Midea
3.2 Outdoor unit:
M OV T B - 36 C N1 – R 13 C
Compressor - C: Copeland
13SEER
Power Supply - R: 380-415V~, 3Ph, 50Hz
Omit: 220-240V~, 1Ph, 50Hz
Refrigerant Type - N1: R410A
Cooling only
Nominal Cooling Capacity (36×1,000Btu/h)
Series Number: B type
Tropical Appliance
Top-discharge Outdoor Unit
Midea
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
4
4. Product features
Indoor Unit
General
These duct type indoor units which capacity range is from 1.5ton to 5ton, are suitable for
mounting above ceiling. The units are factory assembled, internally wired and tested before
leaving the manufacture. The indoor units are insulated by polyethylene foam.
Casing
The units are constructed form Heavy Gauge Zinc coated steel sheets. The sheet steel zinc
coated by hot dip process confirming to standard ASTMA 653.
Evaporator
Internally finned, copper tubes mechanically bonded to a configured hydrophilic aluminum fin
shall be standard. Coils are leak tested at the factory to ensure the pressure integrity. The
evaporator coil is already leak tested to 3,100kPa (450 psig). Anti-corrosion treatment for coils is
optional.
Drain pan
The condensate drain pan is fabricated of EPS. The inner of the drain pan adopts vacuum
forming technology.
Indoor fan
The indoor units have centrifugal fan. The fan is directly driven by indoor fan motor.
Filter
The filter is already fix in the frame of air return. It is Nylon washable type.
Outdoor unit
General
The outdoor units are top-discharge type. The units with weatherproof heavy gauge base are
factory assembled, internally wired, fully charged refrigerant and 100% run tested to check
cooling operation, fan rotation and control sequence before leaving the factory.
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
5
Casing
Unit casing is constructed of zinc coated, heavy gauge, and galvanized steel. Exterior surfaces
shall be cleaned, G90 galvanized heavy gauge plate conforming to ASTMA 653, followed by
baked on electrostatic polyester dry powder coat paint on all external panels, completely
weatherized for outdoor installation and properly reinforced and brazed. Salt spray test for steel
sheet under 1,000 hours, specially treated can be up to 2,000 hours and even more (It should
be customized.). Cabinet construction allows for all maintenance on one side of the unit.
Service panels are removed easily and re-installed by removing screws.
Compressor
All the outdoor units have single totally enclosed hermetically scroll compressor - Copeland.
The compressors have internal overload relay. High pressure switch, low pressure switch and
discharge temperature sensor is standard.
Condenser
Internally finned, copper tubes mechanically bonded to a configured hydrophilic aluminum fin
shall be standard. Coils are leak tested at the factory to ensure the pressure integrity. The
evaporator coil is already leak tested to 3,100kPa (450 psig). Anti-corrosion treatment for coils is
optional.
Outdoor fan
The fan is direct driven by weather proof motor (IP44 and insulation class F) to ensure reliable
continuous operation. Statically and dynamically balanced drive motor design with maintenance
– free bearing for outdoor installation. The fan is multi-blade vane-axial type, made of metal
material for quiet operation and durability.
Electrical control box
In the electrical control box with the PCB board, wiring internal to the unit shall be colored and
numbered for simplified identification. The PCB parts can be coated with double-side moisture
proof paint, and the outer side of electric box metal cover is spray-painted (It should be
customized.).
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
6
Part. 2 Indoor Unit
1. Features .............................................................................. 7
2. Specifications ...................................................................... 8
3. Dimensions ........................................................................ 19
4. Service Space ................................................................... 25
5. Refrigerant circuit .............................................................. 25
6. Wiring Diagrams ................................................................ 26
7. Capacity Table ................................................................... 35
8. Fan performance ............................................................... 41
9. Electric Characteristics ...................................................... 46
10. Sound Levels ..................................................................... 46
11. Accessories ....................................................................... 47
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
7
1. Features
Full capacity range: 1.5ton, 2ton, 3ton, 4ton and 5ton.
Suitable for using refrigerant R410A.
Tropical design with Copeland compressor.
Blue hydrophilic fin and inner grooved copper pipe.
3-speed indoor fan for enhanced comfort.
Air intake filter as standard.
Highly efficient scroll compressor, with thermal protectors to prevent motor overheating.
Power supply of indoor and outdoor is separated, easy installation.
Long piping length. Max. equivalent piping length is 55m, and Max. vertical distance between
outdoor unit and indoor unit is 46m, when outdoor unit is up.
220V signal terminal of wired controller is reserved, and wired controller with 5V signal is
customized.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
8
2. Specifications
Model
MTA-18WN1
Matched outdoor unit
MOVTB-18CN1-13C
Power supply \ 220 - 240V~, 1Ph, 50Hz
Cooling (T1)
Capacity
Btu/h
18,000
W
5,274
Input
W
1,552
EER
W/W
3.40
Btu/h.W
11.6
Cooling (T3)
Capacity
Btu/h
16,000
W
4,690
Input
W
1,975
EER
W/W
2.37
Btu/h.W
8.1
Rated input
W
120
Rated current
A
0.6
Indoor
fan motor
Model (× Quantity) \ YKSS-61-4-62 (×1)
Brand
\
Matchwell/Yongan/Tongde
Input (Hi/Med/Lo) W 152/125/117
Capacitor
\
3.5μF/450V
Speed (Hi/Med/Lo)
r/min
1,322/1,191/1,144
Indoor coil
Number of rows
\
2+2
Tube pitch(a)×row pitch(b)
mm
21×13.37
Fin space
mm
1.3
Fin type
\
Hydrophilic aluminum fin
Tube size
mm
Ф7
Tube type \ Inner grooved copper pipe
Coil(W×H)
mm
(955×147) + (955×147)
Number of circuits
\
4
Indoor air flow
m3/h
1,125/901/831
CFM
662/530/489
External static pressure
Pa
25 (0 - 87)
Indoor noise level
dB(A)
42/38/37
Refrigerant
Type
\
R410A
Control
\
Throttle valve
Design pressure
MPa
4.4/2.6
Refrigerant
pipe
Liquid side/ Gas side
mm
Ф9.52/Ф19.1
Max. equivalent
refrigerant pipe length
m
55
Max. difference in level m 46
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
9
Model
MTA-18WN1
Matched outdoor unit
MOVTB-18CN1-13C
Connecting
wire
Power wire (Indoor unit) \ 3×2.5mm2
Signal wire
\
2×0.75mm2
Drain pipe size (OD)
mm
Ф25
Controller \ Optional (220V signal reserved)
Operation temperature
°C
18 - 30
Dimension (W×H×D)
mm
1,220×210×500
Packing (W×H×D)
mm
1,360×292×560
Net/Gross weight
kg
27/32
Notes:
1. The nominal T1 cooling capacities are based on the following conditions:
Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°C WB;
2. The nominal T3 cooling capacities are based on the following conditions:
Indoor temperature: 29°CDB, 19°CWB; Outdoor temperature: 46°CDB, 24°C WB;
3. The noise is measured in the semi noise suppression lab. The sound level is measured 1m below the unit.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
10
Model
MTA-24WN1
Matched outdoor unit
MOVTB-24CN1-13C
Power supply \ 220 - 240V~, 1Ph, 50Hz
Cooling (T1)
Capacity
Btu/h
23,800
W
6,975
Input
W
2,050
EER
W/W
3.40
Btu/h.W
11.6
Cooling (T3)
Capacity
Btu/h
20,600
W
6,038
Input
W
2,512
EER
W/W
2.40
Btu/h.W
8.2
Rated input
W
332
Rated current
A
1.53
Indoor
fan motor
Model (× quantity) \ YSK200-4P (×1)
Brand
\
Welling
Input (Hi/Med/Lo) W (393/)332/278/234
Capacitor
\
10μF/450V
Speed (Hi/Med/Lo)
r/min
(1,230/)1,120/990/880
Indoor coil
Number of rows
\
4
Tube pitch(a)×row pitch(b)
mm
21×13.37
Fin space
mm
1.5
Fin type \ Hydrophilic aluminum fin
Tube size
mm
Ф7
Tube type \ Inner grooved copper pipe
Coil(W×H)
mm
955×336
Number of circuits
\
8
Indoor air flow
m3/h
1,743/1,530/1,338
CFM
1,025/900/787
External static pressure
Pa
25 (0 - 100)
Indoor noise level
dB(A)
49/46/44
Refrigerant
Type
\
R410A
Control
\
Throttle valve
Design pressure
MPa
4.4/2.6
Refrigerant
pipe
Liquid side/ Gas side
mm
Ф9.52/Ф19.1
Max. equivalent
refrigerant pipe length
m
55
Max. difference in level m 46
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
11
Notes:
1. The nominal T1 cooling capacities are based on the following conditions:
Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°C WB;
2. The nominal T3 cooling capacities are based on the following conditions:
Indoor temperature: 29°CDB, 19°CWB; Outdoor temperature: 46°CDB, 24°C WB;
3. The noise is measured in the semi noise suppression lab. The sound level is measured 1m below the unit.
Model
MTA-24WN1
Matched outdoor unit
MOVTB-24CN1-13C
Connecting
wire
Power wire (Indoor unit) \ 3×2.5mm2
Signal wire
\
2×0.75mm2
Drain pipe size (OD)
mm
Ф25
Controller \ Optional (220V signal reserved)
Operation temperature
°C
18 - 30
Dimension (W×H×D)
mm
1,230×270×775
Packing (W×H×D)
mm
1,355×350×795
Net/Gross weight
kg
38/44
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
12
Model
MTA-36WN1
Matched outdoor unit
MOVTB-36CN1-13C
Power supply \ 220 - 240V~, 1Ph, 50Hz
Cooling (T1)
Capacity
Btu/h
35,000
W
10,258
Input
W
2,865
EER
W/W
3.58
Btu/h.W
12.2
Cooling (T3)
Capacity
Btu/h
30,200
W
8,851
Input
W
3,512
EER
W/W
2.52
Btu/h.W
8.6
Rated input
W
393
Rated current
A
1.8
Indoor
fan motor
Model (× quantity) \ YSK200-4P (×1)
Brand
\
Welling
Input (Hi/Med/Lo) W 393/332/278(/234)
Capacitor
\
10μF/450V
Speed (Hi/Med/Lo)
r/min
1,230/1,120/990(/880)
Indoor coil
Number of rows
\
4
Tube pitch(a)×row pitch(b)
mm
21×13.37
Fin space
mm
1.5
Fin type \ Hydrophilic aluminum fin
Tube size
mm
Ф7
Tube type \ Inner grooved copper pipe
Coil(W×H)
mm
955×336
Number of circuits
\
8
Indoor air flow
m3/h
1,850/1,675/1,472
CFM
1,088/985/866
External static pressure
Pa
37 (0 - 75)
Indoor noise level
dB(A)
51/49/46
Refrigerant
Type
\
R410A
Control
\
Throttle valve
Design pressure
MPa
4.4/2.6
Refrigerant
pipe
Liquid side/ Gas side
mm
Ф9.52/Ф19.1
Max. equivalent
refrigerant pipe length
m
55
Max. difference in level m 46
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
13
Model
MTA-36WN1
Matched outdoor unit
MOVTB-36CN1-13C
Power supply \ 220 - 240V~, 1Ph, 50Hz
Connecting
wire
Power wire (Indoor unit) \ 3×2.5mm2
Signal wire
\
2×0.75mm2
Drain pipe size (OD)
mm
Ф25
Controller \ Optional (220V signal reserved)
Operation temperature
°C
18 - 30
Dimension (W×H×D)
mm
1,230×270×775
Packing (W×H×D)
mm
1,355×350×795
Net/Gross weight
kg
38/44
Notes:
1. The nominal T1 cooling capacities are based on the following conditions:
Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°C WB;
2. The nominal T3 cooling capacities are based on the following conditions:
Indoor temperature: 29°CDB, 19°CWB; Outdoor temperature: 46°CDB, 24°C WB;
3. The noise is measured in the semi noise suppression lab. The sound level is measured 1m below the unit.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
14
Model
MTA-36WN1
Matched outdoor unit
MOVTB-36CN1-R13C
Power supply \ 220 - 240V~, 1Ph, 50Hz
Cooling (T1)
Capacity
Btu/h
34,400
W
10,082
Input
W
2,970
EER
W/W
3.40
Btu/h.W
11.6
Cooling (T3)
Capacity
Btu/h
29,800
W
8,734
Input
W
3,634
EER
W/W
2.40
Btu/h.W
8.2
Rated input
W
393
Rated current
A
1.8
Indoor
fan motor
Model (× quantity) \ YSK200-4P (×1)
Brand
\
Welling
Input (Hi/Med/Lo) W 393/332/278(/234)
Capacitor \ 10μF/450V
Speed (Hi/Med/Lo)
r/min
1,230/1,120/990(/880)
Indoor coil
Number of rows
\
4
Tube pitch(a)×row pitch(b)
mm
21×13.37
Fin space
mm
1.5
Fin type \ Hydrophilic aluminum fin
Tube size
mm
Ф7
Tube type \ Inner grooved copper pipe
Coil(W×H)
mm
955×336
Number of circuits
\
8
Indoor air flow
m3/h
1,850/1,675/1,472
CFM
1,088/985/866
External static pressure
Pa
37 (0 - 75)
Indoor noise level
dB(A)
51/49/46
Refrigerant
Type
\
R410A
Control
\
Throttle valve
Design pressure
MPa
4.4/2.6
Refrigerant
pipe
Liquid side/ Gas side
mm
Ф9.52/Ф19.1
Max. equivalent
refrigerant pipe length
m
55
Max. difference in level m 46
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
15
Model
MTA-36WN1
Matched outdoor unit
MOVTB-36CN1-R13C
Connecting
wire
Power wire (Indoor unit) \ 3×2.5mm2
Signal wire
\
2×0.75mm2
Drain pipe size (OD)
mm
Ф25
Controller \ Optional (220V signal reserved)
Operation temperature
°C
18 - 30
Dimension (W×H×D)
mm
1,230×270×775
Packing (W×H×D)
mm
1,355×350×795
Net/Gross weight
kg
38/44
Notes:
1. The nominal T1 cooling capacities are based on the following conditions:
Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°C WB;
2. The nominal T3 cooling capacities are based on the following conditions:
Indoor temperature: 29°CDB, 19°CWB; Outdoor temperature: 46°CDB, 24°C WB;
3. The noise is measured in the semi noise suppression lab. The sound level is measured 1m below the unit.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
16
Model
MTA-48WN1
Matched outdoor unit
MOVTB-48CN1-R13C
Power supply \ 220 - 240V~, 1Ph, 50Hz
Cooling (T1)
Capacity
Btu/h
48,000
W
14,068
Input
W
4,140
EER
W/W
3.40
Btu/h.W
11.6
Cooling (T3)
Capacity
Btu/h
41,500
W
12,163
Input
W
5,123
EER
W/W
2.37
Btu/h.W
8.1
Rated input
W
740
Rated current
A
3.27
Indoor
fan motor
Model (× quantity)
\
YSK400-4C-2 or YKSS-400-4-8 (×1)
Brand
\
Welling/Yongan
Input (Hi/Med/Lo)
W
(865/)701/621/545 or (930/)740/660/592
Capacitor
\
15μF/450V
Speed (Hi/Med/Lo)
r/min
(1,125/)995/915/850 or (1,080/)920/850/790
Indoor coil
Number of rows
\
4
Tube pitch(a)×row pitch(b)
mm
25.4×22
Fin space
mm
1.6
Fin type \ Hydrophilic aluminum fin
Tube size
mm
Ф9.52
Tube type \ Inner grooved copper pipe
Coil(W×H)
mm
996×355.6
Number of circuits
\
7
Indoor air flow
m3/h
2,759/2,536/2,332
CFM
1,623/1,492/1,372
External static pressure
Pa
50 (0 - 125)
Indoor noise level
dB(A)
52/51/50
Refrigerant
Type
\
R410A
Control
\
Throttle valve
Design pressure
MPa
4.4/2.6
Refrigerant
pipe
Liquid side/ Gas side
mm
Ф9.52/Ф22
Max. equivalent
refrigerant pipe length
m
55
Max. difference in level m 46
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
17
Model
MTA-48WN1
Matched outdoor unit
MOVTB-48CN1-R13C
Connecting
wire
Power wire (Indoor unit) \ 3×2.5mm2
Signal wire
\
2×0.75mm2
Drain pipe size (OD)
mm
Ф25
Controller \ Optional (220V signal reserved)
Operation temperature
°C
18 - 30
Dimension (W×H×D)
mm
1,300×420×691
Packing (W×H×D)
mm
1,436×450×768
Net/Gross weight
kg
65.5/73
Notes:
1. The nominal T1 cooling capacities are based on the following conditions:
Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°C WB;
2. The nominal T3 cooling capacities are based on the following conditions:
Indoor temperature: 29°CDB, 19°CWB; Outdoor temperature: 46°CDB, 24°C WB;
3. The noise is measured in the semi noise suppression lab. The sound level is measured 1m below the unit.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
18
Model
MTA-60WN1
Matched outdoor unit
MOVTB-60CN1-R13C
Power supply \ 220 - 240V~, 1Ph, 50Hz
Cooling (T1)
Capacity
Btu/h
57,000
W
16,706
Input
W
4,870
EER
W/W
3.43
Btu/h.W
11.7
Cooling (T3)
Capacity
Btu/h
50,000
W
14,654
Input
W
6,173
EER
W/W
2.37
Btu/h.W
8.1
Rated input
W
930
Rated current
A
4.1
Indoor
fan motor
Model (× quantity)
\
YSK400-4C-2 or YKSS-400-4-8 (×1)
Brand
\
Welling/Yongan
Input (Hi/Med/Lo)
W
(865/)701/621/545 or (930/)740/660/592
Capacitor
\
15μF/450V
Speed (Hi/Med/Lo)
r/min
(1,125/)995/915/850 or (1,080/)920/850/790
Indoor coil
Number of rows
\
4
Tube pitch(a)×row pitch(b)
mm
25.4×22
Fin space
mm
1.6
Fin type \ Hydrophilic aluminum fin
Tube size
mm
Ф9.52
Tube type \ Inner grooved copper pipe
Coil(W×H)
mm
996×355.6
Number of circuits
\
7
Indoor air flow
m3/h
3,312/2,759/2,536
CFM
1,948/1,623/1,492
External static pressure
Pa
50 (0 - 125)
Indoor noise level
dB(A)
54/52/51
Refrigerant
Type
\
R410A
Control
\
Throttle valve
Design pressure
MPa
4.4/2.6
Refrigerant
pipe
Liquid side/ Gas side
mm
Ф9.52/Ф22
Max. equivalent
refrigerant pipe length
m
55
Max. difference in level m 46
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
19
Model
MTA-60WN1
Matched outdoor unit
MOVTB-60CN1-R13C
Connecting
wire
Power wire (Indoor unit) \ 3×2.5mm2
Signal wire
\
2×0.75mm2
Drain pipe size (OD)
mm
Ф25
Controller \ Optional (220V signal reserved)
Operation temperature
°C
18 - 30
Dimension (W×H×D)
mm
1,300×420×691
Packing (W×H×D)
mm
1,436×450×768
Net/Gross weight
kg
65.5/73
Notes:
1. The nominal T1 cooling capacities are based on the following conditions:
Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°C WB;
2. The nominal T3 cooling capacities are based on the following conditions:
Indoor temperature: 29°CDB, 19°CWB; Outdoor temperature: 46°CDB, 24°C WB;
3. The noise is measured in the semi noise suppression lab. The sound level is measured 1m below the unit.
3. Dimensions
MTA-18WN1 (Unit: mm)
Air outlet side view
Air inlet side view
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
20
Top view
Left side view
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
21
MTA-24WN1, MTA-36WN1 (Unit: mm)
Air outlet side view
Air inlet side view
Top view
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
22
Left side view
(Unit: mm)
Model
Outline dimension
Air outlet opening size
A B C D E F G H I
MTA-24WN1
1,140
270
775
710
1,230
65
933
35
179
MTA-36WN1
1,140
270
775
710
1,230
65
933
35
179
(Unit: mm)
Model
Air return opening size
Size of mounted lug
Fresh air inlet
J K L M N O P T MTA-24WN1
1,035
260
20
1,180
490
26
20
Φ125
MTA-36WN1
1,035
260
20
1,180
490
26
20
Φ125
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
23
MTA-48WN1, MTA-60WN1 (Unit: mm)
Air outlet side view
Air inlet side view
Connecting pipe side view
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
24
Top view
A view
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
25
4. Service Space
Top view
5. Refrigerant circuit
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
26
6. Wiring Diagrams
MTA-18WN1 (Other thermostat with 220V signal)
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
27
MTA-24WN1 (Other thermostat with 220V signal)
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
28
MTA-36WN1 (Other thermostat with 220V signal)
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
29
MTA-48WN1 (Other thermostat with 220V signal)
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
30
MTA-60WN1 (Other thermostat with 220V signal)
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
31
MTA-24WN1 (Factory default thermostat with 5V signal) (Customized)
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
32
MTA-36WN1 (Factory default thermostat with 5V signal) (Customized)
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
33
MTA-48WN1 (Factory default thermostat with 5V signal) (Customized)
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
34
MTA-60WN1 (Factory default thermostat with 5V signal) (Customized)
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
35
7. Capacity Table
MTA-18WN1 + MOVTB-18CN1-13C
Indoor
air flow
Outdoor
Temp. (DB)
IWB (°C)
15.0
17.2
19.4
21.7
IDB (°C)
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
660CFM
1,120m3/h
29.4
TC
16.6
16.9
17.2
17.5
17.7
17.7
18.1
18.5
18.8
18.8
18.8
19.2 / 20.0
20.0
20.0
SC
13.6
16.9
17.2
17.5
10.6
14.2
18.1
18.5
7.5
11.1
14.9
18.6 / 8.0
11.6
15.4
kW
1.36
1.36
1.36
1.36
1.36
1.36
1.36
1.36
1.37
1.37
1.37
1.37 / 1.37
1.37
1.37
35.0
TC
15.9
16.2
16.5
16.8
16.9
16.9
17.2
17.5
18.0
18.0
18.0
18.4 / 19.1
19.1
19.1
SC
13.2
16.2
16.5
16.8
10.3
13.9
17.2
17.5
7.2
10.8
14.4
18.2 / 7.6
11.3
15.1
kW
1.54
1.54
1.54
1.54
1.54
1.54
1.54
1.54
1.55
1.55
1.55
1.55 / 1.55
1.55
1.55
40.6
TC
15.1
15.4
15.7
16.0
16.1
16.1
16.4
16.7
17.1
17.1
17.1
17.4 / 18.2
18.2
18.2
SC
12.8
15.4
15.7
16.0
9.8
13.5
16.4
16.7
6.8
10.4
14.0
17.4 / 7.5
11.1
14.7
kW
1.73
1.73
1.73
1.73
1.74
1.74
1.74
1.74
1.75
1.75
1.75
1.75 / 1.76
1.76
1.76
46.1
TC
14.2
14.5
14.8
15.1
15.1
15.1
15.4
15.7
16.1
16.1
16.1
16.4 / 17.1
17.1
17.1
SC
12.5
14.5
14.8
15.1
9.5
13.1
15.4
15.7
6.4
10.0
13.7
16.4 / 7.0
10.6
14.2
kW
1.95
1.95
1.95
1.95
1.96
1.96
1.96
1.96
1.97
1.97
1.97
1.97 / 1.98
1.98
1.98
47.8
TC
13.1
13.4
13.7
14.0
14.0
14.0
14.3
14.6
14.9
14.9
14.9
15.2 / 16.0
16.0
16.0
SC
11.9
13.4
13.7
14.0
9.0
12.6
14.3
14.6
6.0
9.5
13.3
15.2 / 6.6
10.2
13.9
kW
2.02
2.02
2.02
2.02
2.03
2.03
2.03
2.03
2.04
2.04
2.04
2.04 / 2.06
2.06
2.06
51.7
TC
12.1
12.3
12.5
12.8
13.0
13.0
13.3
13.6
13.9
13.9
13.9
14.2 / 14.8
14.8
14.8
SC
11.5
12.3
12.5
12.8
8.6
12.2
13.3
13.6
5.6
9.2
12.8
14.2 / 6.1
9.8
13.5
kW
2.21
2.21
2.21
2.21
2.22
2.22
2.22
2.22
2.23
2.23
2.23
2.23 / 2.24
2.24
2.24
Notes:
1. IDB = Indoor Dry Bulb Temp. (°C); IWB = Indoor Wet Bulb Temp. (°C); TC = Total Cap. (1,000Btu/h); SC = Sensible Cap. (1,000Btu/h); kW = Power Input (kW).
Airflow Correction Factors
Air flow
TC
SC
kW
580CFM (990m3/h)
×0.98
×0.96
×0.99
740CFM (1,260m3/h)
×1.02
×1.06
×1.01
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
36
MTA-24WN1 + MOVTB-24CN1-13C
Indoor
air flow
Outdoor
Temp. (DB)
IWB (°C)
15.0
17.2
19.4
21.7
IDB (°C)
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
780CFM
1,326m3/h
29.4
TC
22.3
22.7
23.2
23.7
23.7
23.7
23.7
24.2
25.1
25.1
25.1
25.1 / 26.7
26.7
26.7
SC
17.2
21.6
23.2
23.7
13.5
17.8
22.0
24.2
9.8
14.1
18.3
22.6 / 10.1
14.4
19.0
kW
1.84
1.84
1.84
1.84
1.85
1.85
1.85
1.85
1.85
1.85
1.85
1.85 / 1.86
1.86
1.86
35.0
TC
21.0
21.4
21.8
22.2
22.4
22.4
22.8
23.3
23.8
23.8
23.8
23.8 / 25.3
25.3
25.3
SC
16.4
21.0
21.8
22.2
12.8
17.0
21.7
23.3
9.0
13.3
17.6
22.1 / 9.6
13.9
18.2
kW
2.03
2.03
2.03
2.03
2.04
2.04
2.04
2.04
2.05
2.05
2.05
2.05 / 2.05
2.05
2.05
40.6
TC
19.7
20.1
20.5
20.9
21.0
21.0
21.4
21.8
22.4
22.4
22.4
22.8 / 23.8
23.8
23.8
SC
15.8
20.1
20.5
20.9
12.2
16.6
21.0
21.8
8.5
12.8
17.2
21.7 / 9.0
13.3
17.6
kW
2.25
2.25
2.25
2.25
2.26
2.26
2.26
2.26
2.27
2.27
2.27
2.27 / 2.29
2.29
2.29
46.1
TC
18.3
18.7
19.1
19.5
19.5
19.5
19.9
20.3
20.8
20.8
20.8
21.2 / 22.2
22.2
22.2
SC
15.2
18.7
19.1
19.5
11.5
15.8
19.9
20.3
7.9
12.3
16.4
21.0 / 8.4
12.9
17.1
kW
2.50
2.50
2.50
2.50
2.51
2.51
2.51
2.51
2.53
2.53
2.53
2.53 / 2.54
2.54
2.54
47.8
TC
17.8
18.2
18.6
19.0
19.0
19.0
19.4
19.8
20.3
20.3
20.3
20.7 / 21.7
21.7
21.7
SC
15.0
18.2
18.6
19.0
11.4
15.6
19.4
19.8
7.7
12.0
16.2
20.7 / 8.2
12.6
16.9
kW
2.58
2.58
2.58
2.58
2.60
2.60
2.60
2.60
2.61
2.61
2.61
2.61 / 2.63
2.63
2.63
51.7
TC
16.7
17.0
17.3
17.6
17.8
17.8
18.2
18.6
19.1
19.1
19.1
19.5 / 20.4
20.4
20.4
SC
14.4
17.0
17.3
17.6
10.9
15.1
18.2
18.6
7.3
11.5
15.9
19.5 / 7.8
12.0
16.5
kW
2.80
2.80
2.80
2.80
2.81
2.81
2.81
2.81
2.82
2.82
2.82
2.82 / 2.84
2.84
2.84
Notes:
1. IDB = Indoor Dry Bulb Temp. (°C); IWB = Indoor Wet Bulb Temp. (°C); TC = Total Cap. (1,000Btu/h); SC = Sensible Cap. (1,000Btu/h); kW = Power Input (kW).
Airflow Correction Factors
Air flow
TC
SC
kW
680CFM (1,156m3/h)
×0.98
×0.96
×0.99
880CFM (1,496m3/h)
×1.02
×1.06
×1.01
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
37
MTA-36WN1 + MOVTB-36CN1-13C
Indoor
air flow
Outdoor
Temp. (DB)
IWB (°C)
15.0
17.2
19.4
21.7
IDB (°C)
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
1,000CFM
1,700m3/h
29.4
TC
32.8
32.8
33.5
34.2
34.9
34.9
34.9
35.6
37.1
37.1
37.1
37.1 / 39.3
39.3
39.3
SC
24.3
29.8
33.5
34.2
19.5
25.1
30.7
35.6
14.8
20.4
26.0
31.5 / 15.7
21.2
26.7
kW
2.58
2.58
2.58
2.58
2.58
2.58
2.58
2.58
2.59
2.59
2.59
2.59 / 2.60
2.60
2.60
35.0
TC
30.9
30.9
31.5
32.1
32.9
32.9
32.9
33.6
35.0
35.0
35.0
35.0 / 37.2
37.2
37.2
SC
23.5
28.7
31.5
32.1
18.8
24.3
29.6
33.6
14.0
19.6
25.2
30.5 / 14.9
20.5
26.0
kW
2.84
2.84
2.84
2.84
2.85
2.85
2.85
2.85
2.86
2.86
2.86
2.86 / 2.86
2.86
2.86
40.6
TC
28.9
29.5
30.1
30.7
30.8
30.8
30.8
31.4
32.8
32.8
32.8
32.8 / 34.9
34.9
34.9
SC
22.3
28.3
30.1
30.7
17.9
23.4
29.0
31.4
13.1
18.7
24.3
29.8 / 14.0
19.5
25.1
kW
3.13
3.13
3.13
3.13
3.14
3.14
3.14
3.14
3.16
3.16
3.16
3.16 / 3.18
3.18
3.18
46.1
TC
26.7
27.2
27.7
28.3
28.5
28.5
29.1
29.7
30.4
30.4
30.4
30.4 / 32.4
32.4
32.4
SC
21.4
27.2
27.7
28.3
16.8
22.2
27.9
29.7
12.2
17.6
23.1
28.6 / 13.0
18.5
24.0
kW
3.47
3.47
3.47
3.47
3.49
3.49
3.49
3.49
3.51
3.51
3.51
3.51 / 3.53
3.53
3.53
47.8
TC
26.4
26.9
27.4
27.9
28.2
28.2
28.8
29.4
30.1
30.1
30.1
30.7 / 32.1
32.1
32.1
SC
21.1
26.9
27.4
27.9
16.6
22.3
27.9
29.4
12.0
17.5
23.2
28.9 / 12.8
18.3
24.1
kW
3.59
3.59
3.59
3.59
3.60
3.60
3.60
3.60
3.62
3.62
3.62
3.62 / 3.65
3.65
3.65
51.7
TC
24.8
25.3
25.8
26.3
26.5
26.5
27.0
27.5
28.3
28.3
28.3
28.9 / 30.2
30.2
30.2
SC
20.3
25.3
25.8
26.3
15.9
21.5
27.0
27.5
11.3
16.7
22.4
28.0 / 12.1
17.8
23.3
kW
3.88
3.88
3.88
3.88
3.89
3.89
3.89
3.89
3.91
3.91
3.91
3.91 / 3.94
3.94
3.94
Notes:
1. IDB = Indoor Dry Bulb Temp. (°C); IWB = Indoor Wet Bulb Temp. (°C); TC = Total Cap. (1,000Btu/h); SC = Sensible Cap. (1,000Btu/h); kW = Power Input (kW).
Airflow Correction Factors
Air flow
TC
SC
kW
880CFM (1,496m3/h)
×0.98
×0.96
×0.99
1,130CFM (1,921m3/h)
×1.02
×1.06
×1.01
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
38
MTA-36WN1 + MOVTB-36CN1-R13C
Indoor
air flow
Outdoor
Temp. (DB)
IWB (°C)
15.0
17.2
19.4
21.7
IDB (°C)
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
1,000CFM
1,700m3/h
29.4
TC
32.2
32.2
32.8
33.5
34.2
34.2
34.2
34.9
36.3
36.3
36.3
36.3 / 38.6
38.6
38.6
SC
23.8
29.3
32.8
33.5
18.8
24.6
30.1
34.9
14.2
19.6
25.0
30.9 / 15.1
20.5
25.9
kW
2.67
2.67
2.67
2.67
2.67
2.67
2.67
2.67
2.68
2.68
2.68
2.68 / 2.69
2.69
2.69
35.0
TC
30.4
30.4
31.0
31.6
32.3
32.3
32.3
32.9
34.4
34.4
34.4
34.4 / 36.5
36.5
36.5
SC
22.8
28.3
31.0
31.6
18.1
23.6
29.1
32.9
13.4
18.9
24.4
29.9 / 13.9
19.7
25.2
kW
2.95
2.95
2.95
2.95
2.96
2.96
2.96
2.96
2.97
2.97
2.97
2.97 / 2.97
2.97
2.97
40.6
TC
28.5
29.1
29.7
30.3
30.4
30.4
30.4
31.0
32.3
32.3
32.3
32.3 / 34.4
34.4
34.4
SC
21.9
27.6
29.7
30.3
17.3
22.8
28.3
31.0
12.6
18.1
23.6
29.1 / 13.1
18.6
24.1
kW
3.26
3.26
3.26
3.26
3.27
3.27
3.27
3.27
3.29
3.29
3.29
3.29 / 3.31
3.31
3.31
46.1
TC
26.4
26.9
27.4
27.9
28.2
28.2
28.8
29.4
30.1
30.1
30.1
30.1 / 32.1
32.1
32.1
SC
20.9
26.6
27.4
27.9
16.1
21.7
27.4
29.4
11.4
17.2
22.6
28.0 / 12.2
17.7
23.4
kW
3.62
3.62
3.62
3.62
3.64
3.64
3.64
3.64
3.66
3.66
3.66
3.66 / 3.68
3.68
3.68
47.8
TC
25.7
26.2
26.7
27.2
27.5
27.5
28.1
28.7
29.4
29.4
29.4
30.0 / 31.3
31.3
31.3
SC
20.6
26.2
26.7
27.2
16.0
21.5
27.3
28.7
11.2
16.8
22.3
27.9 / 11.9
17.5
23.2
kW
3.75
3.75
3.75
3.75
3.76
3.76
3.76
3.76
3.78
3.78
3.78
3.78 / 3.81
3.81
3.81
51.7
TC
24.1
24.6
25.1
25.6
25.8
25.8
26.3
26.8
27.6
27.6
27.6
28.2 / 29.4
29.4
29.4
SC
19.8
24.6
25.1
25.6
15.2
20.6
26.3
26.8
10.5
16.0
21.5
27.4 / 11.2
16.8
22.3
kW
4.05
4.05
4.05
4.05
4.07
4.07
4.07
4.07
4.09
4.09
4.09
4.09 / 4.11
4.11
4.11
Notes:
1. IDB = Indoor Dry Bulb Temp. (°C); IWB = Indoor Wet Bulb Temp. (°C); TC = Total Cap. (1,000Btu/h); SC = Sensible Cap. (1,000Btu/h); kW = Power Input (kW).
Airflow Correction Factors
Air flow
TC
SC
kW
880CFM (1,496m3/h)
×0.98
×0.96
×0.99
1,130CFM (1,921m3/h)
×1.02
×1.06
×1.01
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
39
MTA-48WN1 + MOVTB-48CN1-R13C
Indoor
air flow
Outdoor
Temp. (DB)
IWB (°C)
15.0
17.2
19.4
21.7
IDB (°C)
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
1,550CFM
2,635m3/h
29.4
TC
44.9
45.8
46.7
47.6
47.7
47.7
47.7
48.7
50.7
50.7
50.7
50.7 / 53.8
53.8
53.8
SC
34.1
43.1
46.7
47.6
26.7
35.3
43.9
48.7
19.8
27.9
36.5
45.1 / 20.4
29.1
37.7
kW
3.72
3.72
3.72
3.72
3.73
3.73
3.73
3.73
3.74
3.74
3.74
3.74 / 3.75
3.75
3.75
35.0
TC
42.4
43.2
44.1
45.0
45.1
45.1
46.0
46.9
48.0
48.0
48.0
48.0 / 51.0
51.0
51.0
SC
33.1
41.9
44.1
45.0
25.7
34.3
43.2
46.9
18.2
26.9
35.5
44.2 / 19.4
28.1
36.7
kW
4.11
4.11
4.11
4.11
4.12
4.12
4.12
4.12
4.14
4.14
4.14
4.14 / 4.14
4.14
4.14
40.6
TC
39.7
40.5
41.3
42.1
42.4
42.4
43.2
44.1
45.1
45.1
45.1
46.0 / 48.0
48.0
48.0
SC
31.8
40.5
41.3
42.1
24.6
33.1
41.9
44.1
17.1
25.7
34.3
43.2 / 18.2
26.9
35.5
kW
4.54
4.54
4.54
4.54
4.56
4.56
4.56
4.56
4.59
4.59
4.59
4.59 / 4.62
4.62
4.62
46.1
TC
36.9
37.6
38.4
39.2
39.4
39.4
40.2
41.0
42.0
42.0
42.0
42.8 / 44.7
44.7
44.7
SC
30.3
37.6
38.4
39.2
23.2
31.9
40.2
41.0
16.0
24.4
33.2
41.9 / 17.0
25.5
34.4
kW
5.05
5.05
5.05
5.05
5.07
5.07
5.07
5.07
5.10
5.10
5.10
5.10 / 5.13
5.13
5.13
47.8
TC
35.9
36.6
37.3
38.0
38.4
38.4
39.2
40.0
41.0
41.0
41.0
41.8 / 43.7
43.7
43.7
SC
29.8
36.6
37.3
38.0
22.7
31.5
39.2
40.0
15.6
24.2
32.8
41.4 / 16.6
25.3
33.6
kW
5.22
5.22
5.22
5.22
5.24
5.24
5.24
5.24
5.27
5.27
5.27
5.27 / 5.30
5.30
5.30
51.7
TC
33.6
34.3
35.0
35.7
36.0
36.0
36.7
37.4
38.4
38.4
38.4
39.2 / 41.0
41.0
41.0
SC
28.9
34.3
35.0
35.7
21.6
30.2
36.7
37.4
14.6
23.0
31.5
39.2 / 15.6
24.2
32.8
kW
5.65
5.65
5.65
5.65
5.67
5.67
5.67
5.67
5.70
5.70
5.70
5.70 / 5.74
5.74
5.74
Notes:
1. IDB = Indoor Dry Bulb Temp. (°C); IWB = Indoor Wet Bulb Temp. (°C); TC = Total Cap. (1,000Btu/h); SC = Sensible Cap. (1,000Btu/h); kW = Power Input (kW).
Airflow Correction Factors
Air flow
TC
SC
kW
1,360CFM (2,312m3/h)
×0.98
×0.96
×0.99
1,740CFM (2,958m3/h)
×1.02
×1.06
×1.01
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
40
MTA-60WN1 + MOVTB-60CN1-R13C
Indoor
air flow
Outdoor
Temp. (DB)
IWB (°C)
15.0
17.2
19.4
21.7
IDB (°C)
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
21.1
23.9
26.7
29.4
1,700CFM
2,890m3/h
29.4
TC
53.0
53.0
54.1
55.2
56.4
56.4
56.4
57.5
60.0
60.0
60.0
60.0 / 63.6
63.6
63.6
SC
39.8
49.3
54.1
55.2
32.1
41.2
50.8
57.5
24.0
33.6
42.6
52.2 / 25.4
35.0
43.9
kW
4.29
4.29
4.29
4.29
4.30
4.30
4.30
4.30
4.31
4.31
4.31
4.31 / 4.33
4.33
4.33
35.0
TC
50.3
51.3
52.3
53.3
53.6
53.6
53.6
54.7
57.0
57.0
57.0
57.0 / 60.6
60.6
60.6
SC
38.7
48.2
52.3
53.3
30.6
40.2
49.3
54.7
22.8
32.5
41.6
50.7 / 24.2
33.3
43.0
kW
4.83
4.83
4.83
4.83
4.85
4.85
4.85
4.85
4.87
4.87
4.87
4.87 / 4.87
4.87
4.87
40.6
TC
47.4
48.3
49.3
50.3
50.6
50.6
51.6
52.6
53.8
53.8
53.8
53.8 / 57.3
57.3
57.3
SC
37.4
46.9
49.3
50.3
29.3
39.0
48.5
52.6
21.5
30.7
40.4
49.5 / 22.9
32.1
41.8
kW
5.43
5.43
5.43
5.43
5.45
5.45
5.45
5.45
5.48
5.48
5.48
5.48 / 5.51
5.51
5.51
46.1
TC
44.3
45.2
46.1
47.0
47.3
47.3
48.2
49.2
50.3
50.3
50.3
51.3 / 53.6
53.6
53.6
SC
35.9
45.2
46.1
47.0
27.9
37.4
47.2
49.2
20.1
29.7
38.7
48.7 / 21.4
31.1
40.2
kW
6.11
6.11
6.11
6.11
6.13
6.13
6.13
6.13
6.17
6.17
6.17
6.17 / 6.21
6.21
6.21
47.8
TC
42.1
42.9
43.8
44.7
45.0
45.0
45.9
46.8
48.1
48.1
48.1
49.1 / 51.3
51.3
51.3
SC
34.5
42.9
43.8
44.7
27.0
36.5
45.9
46.8
19.2
28.4
38.0
47.6 / 20.5
30.3
39.5
kW
6.33
6.33
6.33
6.33
6.36
6.36
6.36
6.36
6.39
6.39
6.39
6.39 / 6.43
6.43
6.43
51.7
TC
39.2
40.0
40.8
41.6
42.0
42.0
42.8
43.7
44.9
44.9
44.9
45.8 / 48.0
48.0
48.0
SC
33.3
40.0
40.8
41.6
25.6
34.9
42.8
43.7
18.0
27.4
36.8
45.8 / 19.2
28.8
38.4
kW
6.89
6.89
6.89
6.89
6.92
6.92
6.92
6.92
6.95
6.95
6.95
6.95 / 7.00
7.00
7.00
Notes:
1. IDB = Indoor Dry Bulb Temp. (°C); IWB = Indoor Wet Bulb Temp. (°C); TC = Total Cap. (1,000Btu/h); SC = Sensible Cap. (1,000Btu/h); kW = Power Input (kW).
Airflow Correction Factors
Air flow
TC
SC
kW
1,550CFM (2,635m3/h)
×0.98
×0.96
×0.99
2,000CFM (3,400m3/h)
×1.02
×1.06
×1.01
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
41
8. Fan performance
MTA-18WN1
ESP
In.H2O
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
Pa
0
12.5
24.9
37.4
49.8
62.3
74.7
87.2
Air
volume
Low
CFM
540
519
489
455
404
345
284
210
m3/h
918
882
831
774
687
587
483
357
Medium
CFM
590
565
530
484
435
375
308
230
m3/h
1,003
961
901
823
740
638
524
391
High
CFM
768
717
662
605
534
460
382
290
m3/h
1,306
1,219
1,125
1,029
908
782
649
493
Notes:
ESP: External static pressure.
The values are based the unit with filter operating under cooling mode.
Shaded boxes: represent airflow outside the required.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
42
MTA-24WN1
ESP
In.H2O
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
Pa
0
12.5
24.9
37.4
49.8
62.3
74.7
87.2
99.6
Air
volume
Low
CFM
853
820
787
757
727
693
659
622
584
m3/h
1,450
1,394
1,338
1,287
1,236
1,178
1,120
1,057
993
Medium
CFM
983
942
900
866
832
795
757
713
669
m3/h
1,671
1,601
1,530
1,472
1,414
1,352
1,287
1,212
1,137
High
CFM
1,113
1,069
1,025
985
945
903
860
810
760
m3/h
1,892
1,817
1,743
1,675
1,607
1,535
1,462
1,377
1,292
Notes:
ESP: External static pressure.
The values are based the unit with filter operating under cooling mode.
Shaded boxes: represent airflow outside the required.
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
43
MTA-36WN1
ESP
In.H2O
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
Pa
0
12.5
24.9
37.4
49.8
62.3
74.7
87.2
99.6
Air
volume
Low
CFM
983
942
900
866
832
795
757
713
669
m3/h
1,671
1,601
1,530
1,472
1,414
1,352
1,287
1,212
1,137
Medium
CFM
1,113
1,069
1,025
985
945
903
860
810
760
m3/h
1,892
1,817
1,743
1,675
1,607
1,535
1,462
1,377
1,292
High
CFM
1,248
1,192
1,136
1,088
1,040
990
940
886
831
m3/h
2,122
2,026
1,931
1,850
1,768
1,683
1,598
1,506
1,413
Notes:
ESP: External static pressure.
The values are based the unit with filter operating under cooling mode.
Shaded boxes: represent airflow outside the required.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
44
MTA-48WN1
ESP
In.H2O
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
Pa
0
12.5
24.9
37.4
49.8
62.3
74.7
87.2
Air
volume
Low
CFM
1,502
1,470
1,437
1,405
1,372
1,340
1,306
1,272
m3/h
2,553
2,499
2,443
2,389
2,332
2,278
2,220
2,162
Medium
CFM
1,629
1,597
1,566
1,529
1,492
1,459
1,421
1,386
m3/h
2,769
2,715
2,662
2,599
2,536
2,480
2,415
2,356
High
CFM
1,774
1,737
1,699
1,662
1,623
1,593
1,551
1,513
m3/h
3,016
2,953
2,888
2,825
2,759
2,708
2,637
2,572
ESP
In.H2O
0.40
0.45
0.5
Pa
99.6
112.1
124.5
Air
volume
Low
CFM
1,239
1,205
1,171
m3/h
2,106
2,049
1,991
Medium
CFM
1,349
1,318
1,287
m3/h
2,293
2,241
2,188
High
CFM
1,474
1,436
1,400
m3/h
2,506
2,441
2,380
Notes:
ESP: External static pressure.
The values are based the unit with filter operating under cooling mode.
Shaded boxes: represent airflow outside the required.
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
45
MTA-60WN1
ESP
In.H2O
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
Pa
0
12.5
24.9
37.4
49.8
62.3
74.7
87.2
Air
volume
Low
CFM
1,629
1,597
1,566
1,529
1,492
1,459
1,421
1,386
m3/h
2,769
2,715
2,662
2,599
2,536
2,480
2,415
2,356
Medium
CFM
1,774
1,737
1,699
1,662
1,623
1,593
1,551
1,513
m3/h
3,016
2,953
2,888
2,825
2,759
2,708
2,637
2,572
High
CFM
2,138
2,090
2,043
1,995
1,948
1,900
1,855
1,811
m3/h
3,635
3,553
3,473
3,392
3,312
3,230
3,154
3,079
ESP
In.H2O
0.40
0.45
0.5
Pa
99.6
112.1
124.5
Air
volume
Low
CFM
1,349
1,318
1,287
m3/h
2,293
2,241
2,188
Medium
CFM
1,474
1,436
1,400
m3/h
2,506
2,441
2,380
High
CFM
1,766
1,722
1,677
m3/h
3,002
2,927
2,851
Notes:
ESP: External static pressure.
The values are based the unit with filter operating under cooling mode.
Shaded boxes: represent airflow outside the required.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
46
9. Electric Characteristics
Model
Indoor Unit
Power Supply
IFM
Hz
Voltage
Min.
Max.
MCA
MFA
kW
FLA
MTA-18WN1
50
220-240V
198V
254V
0.67
15
0.144
0.67
MTA-24WN1
50
220-240V
198V
254V
1.53
15
0.332
1.53
MTA-36WN1
50
220-240V
198V
254V
1.8
15
0.393
1.80
MTA-48WN1
50
220-240V
198V
254V
3.27
15
0.740
3.27
MTA-60WN1
50
220-240V
198V
254V
4.1
15
0.930
4.10
Note:
MCA: Min. Current Amps. (A)
MFA: Max. Fuse Amps. (A)
IFM: Indoor Fan Motor
kW: Fan Motor Rated Input (kW)
FLA: Full Load Amps. (A)
10. Sound Levels
Concealed Duct Type
Suction
Discharge
Microphone
1.4m
Duct
Model
Sound pressure level
High
Medium
Low
MTA-18WN1
42dB(A)
38dB(A)
37dB(A)
MTA-24WN1
49dB(A)
46dB(A)
44dB(A)
MTA-36WN1
51dB(A)
49dB(A)
46dB(A)
MTA-48WN1
52dB(A)
51dB(A)
50dB(A)
MTA-60WN1
54dB(A)
52dB(A)
51dB(A)
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
47
11. Accessories
Name
Qty.
-
Purpose
Installation manual
1
-
-
Pipe insulation material
2
Heat insulation
Water outlet joint
1
For drainage
Clap
1
Chucking the joint which connect
the drain hose and the outlet of
the indoor unit
Real sponge
(Only available for MTA-18WN1)
1
Real the guiding frame
Copper nut
(Only available for MTA-18WN1)
1
Use for pipe connection of
installation
Connecting pipe
(Only available for MTA-18WN1)
3
Use for pipe connection of
installation
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
48
Part. 3 Outdoor Unit
1. Specifications .................................................................... 49
2. Dimension ......................................................................... 61
3. Service Space ................................................................... 62
4. Wiring Diagrams ................................................................ 63
5. Electric Characteristics ...................................................... 66
6. Sound Levels ..................................................................... 66
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
49
1. Specifications
Model
MOVTB-18CN1-13C
Power supply \ 220 - 240V~, 1Ph, 50Hz
Ambient temperature in cooling
°C
17 - 54
Rated input
W
2,400
Rated current
A
11.5
Compressor
Model
\
ZP20KSE-PFZ-522
Type
\
Scroll
Quantity
\
1
Brand
\
Copeland
Capacity
Btu/h
16,300
Input
W
1,750
Capacitor
\
40μF/450V
Rated current (RLA) A 10
Locked rotor Amp. (LRA) A 52
Thermal protector \ Internal
Refrigerant oil
ml
739
Fan
Type
\
Axial fan
Motor
\
YKS-85-6C
Motor quantity
\
1
Motor brand
\
Welling
Capacitor \ 6μF/450V
Motor input
W
150
Speed
r/min
970
Coil
No. of rows
\
1.8
Tube pitch(a)×row pitch(b)
mm
14.5×12.56
Fin space
mm
1.2
Fin type \ Hydrophilic aluminum fin
Tube outside Dia. and type
mm
Ф5
\
Inner grooved copper pipe
Coil (W×H)
mm
1,371×580
Number of circuits \ 12
Outdoor noise level
dB(A)
58
Indoor air flow
m3/h
1,400
CFM
824
Refrigerant
Type
\
R410A
Charge
g
1,920
Design pressure
MPa
4.4/2.6
Refrigerant pipe
Liquid side
mm
Ф9.52
Gas side
mm
Ф19.1
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
50
Continued:
Model
MOVTB-18CN1-13C
Connection wire
Power wire (Outdoor unit)
\
3×2.5mm2
Signal wire
\
2×0.75mm2
Dimension (W×H×D)
mm
554×633×554
Packing (W×H×D)
mm
585×662×582
Net / Gross weight
kg
55/58
Notes:
1. The nominal T1 cooling capacities are based on the following conditions:
Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°C WB;
2. The nominal T3 cooling capacities are based on the following conditions:
Indoor temperature: 29°CDB, 19°CWB; Outdoor temperature: 46°CDB, 24°C WB;
3. The noise is measured in the semi-anechoic room, at a position 1m in front of the unit and H meter above
the floor. (H=(1+Height of the unit)/2).
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
51
Model
MOVTB-24CN1-13C
Power supply \ 220 - 240V~, 1Ph, 50Hz
Ambient temperature in cooling
°C
17 - 54
Rated input
W
3,000
Rated current
A
14.5
Compressor
Model
\
ZP25KSE-PFZ-522
Type
\
Scroll
Quantity
\
1
Brand
\
Copeland
Capacity
Btu/h
20,300
Input
W
2,110
Capacitor
\
40μF/450V
Rated current (RLA) A 12.5
Locked rotor Amp. (LRA) A 60
Thermal protector \ Internal
Refrigerant oil
ml
739
Fan
Type
\
Axial fan
Motor
\
YDK85-6G-2
Motor quantity
\
1
Motor brand
\
Welling
Capacitor \ 6μF/450V
Motor input
W
150
Speed
r/min
970
Coil
No. of rows
\
2
Tube pitch(a)×row pitch(b)
mm
21×13.37
Fin space
mm
1.5
Fin type \ Hydrophilic aluminum fin
Tube outside Dia. and type
mm
Ф7
\
Inner grooved copper pipe
Coil (W×H)
mm
1,565×588
Number of circuits \ 6
Outdoor noise level
dB(A)
62
Indoor air flow
m3/h
3,000
CFM
1,765
Refrigerant
Type
\
R410A
Charge
g
2,420
Design pressure
MPa
4.4/2.6
Refrigerant pipe
Liquid side
mm
Ф9.52
Gas side
mm
Ф19.1
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
52
Continued:
Model
MOVTB-24CN1-13C
Connection wire
Power wire (Outdoor unit)
\
3×2.5mm2
Signal wire
\
2×0.75mm2
Dimension (W×H×D)
mm
600×633×600
Packing (W×H×D)
mm
628×662×628
Net / Gross weight
kg
59/62
Notes:
1. The nominal T1 cooling capacities are based on the following conditions:
Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°C WB;
2. The nominal T3 cooling capacities are based on the following conditions:
Indoor temperature: 29°CDB, 19°CWB; Outdoor temperature: 46°CDB, 24°C WB;
3. The noise is measured in the semi-anechoic room, at a position 1m in front of the unit and H meter above
the floor. (H=(1+Height of the unit)/2).
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
53
Model
MOVTB-36CN1-13C
Power supply \ 220 - 240V~, 1Ph, 50Hz
Ambient temperature in cooling
°C
17 - 54
Rated input
W
4,000
Rated current
A
20
Compressor
Model
\
ZP36KSE-PFZ-522
Type
\
Scroll
Quantity
\
1
Brand
\
Copeland
Capacity
Btu/h
30,000
Input
W
2,940
Capacitor
\
80μF/450V
Rated current (RLA) A 17.7
Locked rotor Amp. (LRA) A 98
Thermal protector \ Internal
Refrigerant oil
ml
1,242 (POE)
Fan
Type
\
Axial fan
Motor
\
YDK160-6E-1
Motor quantity
\
1
Motor brand
\
Welling
Capacitor
\
6μF/450V
Motor input
W
230
Speed
r/min
900
Coil
No. of rows
\
2
Tube pitch(a)×row pitch(b)
mm
21×13.37
Fin space
mm
1.3
Fin type \ Hydrophilic aluminum fin
Tube outside Dia. and type
mm
Ф7
\
Inner grooved copper pipe
Coil (W×H)
mm
2,005×714
Number of circuits \ 6
Outdoor noise level
dB(A)
64
Indoor air flow
m3/h
5,100
CFM
3,000
Refrigerant
Type
\
R410A
Charge
g
3,320
Design pressure
MPa
4.4/2.6
Refrigerant pipe
Liquid side
mm
Ф9.52
Gas side
mm
Ф19.1
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
54
Continued:
Model
MOVTB-36CN1-13C
Connection wire
Power wire (Outdoor unit)
\
3×4.0mm2
Signal wire
\
2×0.75mm2
Dimension (W×H×D)
mm
710×759×710
Packing (W×H×D)
mm
738×779×738
Net / Gross weight
kg
86/90
Notes:
1. The nominal T1 cooling capacities are based on the following conditions:
Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°C WB;
2. The nominal T3 cooling capacities are based on the following conditions:
Indoor temperature: 29°CDB, 19°CWB; Outdoor temperature: 46°CDB, 24°C WB;
3. The noise is measured in the semi-anechoic room, at a position 1m in front of the unit and H meter above
the floor. (H=(1+Height of the unit)/2).
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
55
Model
MOVTB-36CN1-R13C
Power supply \ 380-415V~, 50Hz, 3Ph
Ambient temperature in cooling
°C
17 - 54
Rated input
W
4,000
Rated current
A
8
Compressor
Model
\
ZP36KSE-TFM-522
Type
\
Scroll
Quantity
\
1
Brand
\
Copeland
Capacity
Btu/h
29,300
Input
W
2,940
Capacitor
\
\
Rated current (RLA) A 6.6
Locked rotor Amp. (LRA) A 46
Thermal protector \ Internal
Refrigerant oil
ml
1,242
Fan
Type
\
Axial fan
Motor
\
YDK160-6E-1
Motor quantity
\
1
Motor brand
\
Welling
Capacitor
\
6μF/450V
Motor input
W
230
Speed
r/min
900
Coil
No. of rows
\
2
Tube pitch(a)×row pitch(b)
mm
21×13.37
Fin space
mm
1.3
Fin type \ Hydrophilic aluminum fin
Tube outside Dia. and type
mm
Ф7
\
Inner grooved copper pipe
Coil (W×H)
mm
2,005×714
Number of circuits \ 6
Outdoor noise level
dB(A)
64
Indoor air flow
m3/h
5,100
CFM
3,000
Refrigerant
Type
\
R410A
Charge
g
3,420
Design pressure
MPa
4.4/2.6
Refrigerant pipe
Liquid side
mm
Ф9.52
Gas side
mm
Ф19.1
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
56
Continued:
Model
MOVTB-36CN1-R13C
Connection wire
Power wire (Outdoor unit)
\
5×2.5mm2
Signal wire
\
2×0.75mm2
Dimension (W×H×D)
mm
710×759×710
Packing (W×H×D)
mm
738×779×738
Net / Gross weight
kg
81/85
Notes:
1. The nominal T1 cooling capacities are based on the following conditions:
Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°C WB;
2. The nominal T3 cooling capacities are based on the following conditions:
Indoor temperature: 29°CDB, 19°CWB; Outdoor temperature: 46°CDB, 24°C WB;
3. The noise is measured in the semi-anechoic room, at a position 1m in front of the unit and H meter above
the floor. (H=(1+Height of the unit)/2).
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
57
Model
MOVTB-48CN1-R13C
Power supply \ 380-415V~, 50Hz, 3Ph
Ambient temperature in cooling
°C
17 - 54
Rated input
W
6,000
Rated current
A
12
Compressor
Model
\
ZP51KSE-TFM-522
Type
\
Scroll
Quantity
\
1
Brand
\
Copeland
Capacity
Btu/h
41,500
Input
W
4,040
Capacitor
\
\
Rated current (RLA) A 8.6
Locked rotor Amp. (LRA) A 51.5
Thermal protector \ Internal
Refrigerant oil
ml
1,240
Fan
Type
\
Axial fan
Motor
\
YDK230-6H
Motor quantity
\
1
Motor brand
\
Welling
Capacitor
\
15μF/450V
Motor input
W
320
Speed
r/min
900
Coil
No. of rows
\
2
Tube pitch(a)×row pitch(b)
mm
21×13.37
Fin space
mm
1.3
Fin type \ Hydrophilic aluminum fin
Tube outside Dia. and type
mm
Ф7
\
Inner grooved copper pipe
Coil (W×H)
mm
2,005×798
Number of circuits \ 6
Outdoor noise level
dB(A)
68
Indoor air flow
m3/h
5,770
CFM
3,394
Refrigerant
Type
\
R410A
Charge
g
4,120
Design pressure
MPa
4.4/2.6
Refrigerant pipe
Liquid side
mm
Ф9.52
Gas side
mm
Ф22
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
58
Continued:
Model
MOVTB-48CN1-R13C
Connection wire
Power wire (Outdoor unit)
\
5×2.5mm2
Signal wire
\
2×0.75mm2
Dimension (W×H×D)
mm
710×843×710
Packing (W×H×D)
mm
738×862×738
Net / Gross weight
kg
89/93
Notes:
1. The nominal T1 cooling capacities are based on the following conditions:
Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°C WB;
2. The nominal T3 cooling capacities are based on the following conditions:
Indoor temperature: 29°CDB, 19°CWB; Outdoor temperature: 46°CDB, 24°C WB;
3. The noise is measured in the semi-anechoic room, at a position 1m in front of the unit and H meter above
the floor. (H=(1+Height of the unit)/2).
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
59
Model
MOVTB-60CN1-R13C
Power supply \ 380-415V~, 50Hz, 3Ph
Ambient temperature in cooling
°C
17 - 54
Rated input
W
7,450
Rated current
A
15
Compressor
Model
\
ZP61KCE-TFD-522
Type
\
Scroll
Quantity
\
1
Brand
\
Copeland
Capacity
Btu/h
50,000
Input
W
4,750
Capacitor
\
\
Rated current (RLA) A 10.9
Locked rotor Amp. (LRA) A 64
Thermal protector \ Internal
Refrigerant oil
ml
1,685 (POE)
Fan
Type
\
Axial fan
Motor
\
YDK230-6H
Motor quantity
\
1
Motor brand
\
Welling
Capacitor
\
15μF/450V
Motor input
W
320
Speed
r/min
900
Coil
No. of rows
\
2
Tube pitch(a)×row pitch(b)
mm
21×13.37
Fin space
mm
1.3
Fin type \ Hydrophilic aluminum fin
Tube outside Dia. and type
mm
Ф7
\
Inner grooved copper pipe
Coil (W×H)
mm
2,125×798
Number of circuits \ 8
Outdoor noise level
dB(A)
68
Indoor air flow
m3/h
6,850
CFM
4,029
Refrigerant
Type
\
R410A
Charge
g
4,320
Design pressure
MPa
4.4/2.6
Refrigerant pipe
Liquid side/
mm
Ф9.52
Gas side
mm
Ф22
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
60
Continued:
Model
MOVTB-60CN1-R13C
Connection wire
Power wire (Outdoor unit)
\
5×2.5mm2
Signal wire
\
2×0.75mm2
Dimension (W×H×D)
mm
740×843×740
Packing (W×H×D)
mm
768×862×768
Net / Gross weight
kg
98/102
Notes:
1. The nominal T1 cooling capacities are based on the following conditions:
Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°C WB;
2. The nominal T3 cooling capacities are based on the following conditions:
Indoor temperature: 29°CDB, 19°CWB; Outdoor temperature: 46°CDB, 24°C WB;
3. The noise is measured in the semi-anechoic room, at a position 1m in front of the unit and H meter above
the floor. (H=(1+Height of the unit)/2).
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
61
2. Dimension
Model
Dimensions
Refrigerant connection valve size
H (mm)
W (mm)
L (mm)
Liquid (mm)
Gas (mm)
MOVTB-18CN1-13C
633
554
554
Φ9.52
Φ19.1
MOVTB-24CN1-13C
633
600
600
Φ9.52
Φ19.1
MOVTB-36CN1-13C
759
710
710
Φ9.52
Φ19.1
MOVTB-36CN1-R13C
759
710
710
Φ9.52
Φ19.1
MOVTB-48CN1-R13C
843
710
710
Φ9.52
Φ22.2
MOVTB-60CN1-R13C
843
740
740
Φ9.52
Φ22.2
Notes: Grill appearance may vary in the figure.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
62
3. Service Space
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
63
4. Wiring Diagrams
MOVTB-18CN1-13C:
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
64
MOVTB-24CN1-13C, MOVTB-36CN1-13C:
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
65
MOVTB-36CN1-R13C, MOVTB-48CN1-R13C, MOVTB-60CN1-R13C:
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
66
5. Electric Characteristics
Model
Outdoor Unit
Power Supply
Compressor
OFM
Hz
Voltage
Min.
Max.
MCA
TOCA
MFA
MSC
RLA
KW
FLA
MOVTB-18CN1-13C
50
220-240V
198V
254V
12
20
25
52 9 0.085
0.68
MOVTB-24CN1-13C
50
220-240V
198V
254V
14.5
25.7
30
60
11.2
0.085
0.68
MOVTB-36CN1-13C
50
220-240V
198V
254V
21
36.9
40
98
15.9
0.130
1.0
MOVTB-36CN1-R13C
50
380-415V
342V
440V
8.6
15
20
46 6 0.130
1.0
MOVTB-48CN1-R13C
50
380-415V
342V
440V
11.2
19
25
51.5
7.8
0.230
1.1
MOVTB-60CN1-R13C
50
380-415V
342V
440V
15.1
26
30
64
10.9
0.230
1.4
Remark:
MCA: Min. Current Amps. (A) TOCA: Total Over-current Amps. (A)
MFA: Max. Fuse Amps. (A) MSC: Max. Starting Amps. (A)
RLA: Rated Locked Amps. (A) OFM: Outdoor Fan Motor.
FLA: Full Load Amps. (A) KW: Rated Motor Output (kW)
6. Sound Levels
Model
Sound pressure level
MOVTB-18CN1-13C
58dB(A)
MOVTB-24CN1-13C
62dB(A)
MOVTB-36CN1-13C
64dB(A)
MOVTB-36CN1-R13C
64dB(A)
MOVTB-48CN1-R13C
68dB(A)
MOVTB-60CN1-R13C
68dB(A)
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
67
Part. 4 Installation
1. Notes ................................................................................. 68
2. Installation of the Indoor Units ........................................... 71
3. Installation of Outdoor Units .............................................. 78
4. Connection of Refrigerant Pipe .......................................... 83
5. Heat Insulation of Refrigerant Pipe .................................... 87
6. Electric Connection ............................................................ 88
7. Trial Run ............................................................................ 92
8. Trouble shooting ................................................................ 93
9. Maintenance ................................................................ ...... 99
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
68
1. Notes
WARNING:
Failure to observe a warning may result in death.
Be sure only trained and qualified service personnel to install, repair or service the equipment.
Improper installation, repair and maintenance may result in electric shocks, short-circuit, leaks,
fire or other damage to the equipment.
Install according to this manual strictly. If installation is defective, it will cause water leakage,
electrical shock fire.
When installing the unit in a small room, take measure to against refrigerant from exceeding
allowable safety limits in the event of refrigerant leakage. Contact the place of purchase for more
information. Excessive refrigerant in a closed ambient can lead to oxygen deficiency.
Use the attached accessories parts and specified parts for installation. Otherwise, it will cause
the unit fall, water leakage, electrical shock fire.
Install at a strong and firm location which is able to withstand the set’s weight. If the strength if
not enough or installation is not properly done, the unit will drop to cause injury.
The unit must be installed 2.5 meter above floor.
The unit shall not be installed in the laundry.
Before obtaining access to terminals, all supply circuits must be disconnected.
The unit must be positioned so that the plug is accessible.
The enclosure of the unit shall be market by word, or by symbols, with the direction of the
refrigerant flow.
For electrical work, follow the local national wiring standard, regulation and this manual. An
independent circuit and single outlet must be used. If electrical circuit capacity is not enough or
defect in electrical work, it will cause electrical shock fire.
Use the specified wire, connect it tightly and clamp it so that no external force will be acted on
the terminal. If connection or fixing is not perfect, will cause heat-up or fire at the connection.
Wiring routing must be properly arranged so that control board cover is fixed properly. If control
board cover is not fixed perfectly, it will cause heat-up at connection point of the terminal, fire or
electrical shock.
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
69
If the power wire is damaged, it must be replaced by the manufacture or its service agent or
similarly qualified person in order to avoid a hazard.
An all-pole disconnection switch having a contact separation of at least 3mm in poles should be
connected in fixed wiring.
When carrying out piping connection, take care not to let air substances go into refrigeration
cycle. Otherwise, it will cause lower capacity, abnormal high pressure in the refrigeration cycle,
explosion and injury.
Do not modify the length of the power supply wire or use of extension wire, and do not share the
single outlet with other electrical units. Otherwise, it will cause fire or electrical shock.
Carry out the specified installation work after taking into account strong winds, typhoons or
earthquakes. Improper installation work may result in the equipment falling and causing
accidents.
If the refrigerant leaks during installation, ventilated the area immediately. Toxic gas may be
produced if the refrigerant comes into the place contacting with fire.
The temperature of refrigerant circuit will be high, please keep the interconnection cable away
from the copper tube.
After completing the installation work, check that the refrigerant does not leak. Toxic gas may be
produced if the refrigerant leaks into the room and comes into contact with a source of fire, such
as a fan heater, stove or cooker.
The unit shall be installed in accordance with national wiring regulations.
An all-pole disconnection device which has at least 3mm separation distance in all poles and a
residual current device (RCD) with the rating of above 10mA shall be incorporated in the fixed
wiring according to the nation rule.
The power wire type designation is H05RN-R / H07RN-F or above.
CAUTION:
Ground the air conditioner. Do not connect the ground wire to gas or water pipes, lightning rod or
a telephone ground wire. Incomplete grounding may result in electric shocks.
Be sure to install an earth leakage breaker. Failure to install an earth leakage breaker may result
in electric shocks.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
70
Connect the outdoor unit wires, and then connect the indoor unit wires. You are not allowed to
connect the air conditioner with the power source until wiring and piping of the air conditioner is
done.
While following the instructions in this manual, install drain piping in order to ensure proper
drainage and insulate piping in order to prevent condensation. Improper drain piping may result
in water leakage and property damage.
Install the indoor and outdoor units, power supply wiring and connecting wires at least 1 meter
away from televisions or radios in order to prevent image interference or noise. Depending on
the radio waves, a distance of 1 meter may not be sufficient enough to eliminate the noise.
The unit is not intended for use by young children or infirm persons without supervision.
Do not install the air conditioner in the following locations:
There is petrolatum existing.
There is salty air surrounding (Near the coast).
There is caustic gas (the sulfide, for example) existing in the air (Near a hot spring).
The volt vibrates violently (in the factories).
In buses or cabinets.
In kitchen where it is full of oil gas.
There is strong electromagnetic wave existing.
There are inflammable materials or gas.
There is acid or alkaline liquid evaporating.
Other special conditions.
If the air conditioner is installed on a metal part of the building, it must be electrically insulated
according to the relevant standards to electrical appliances.
When all the installation work is finished, please turn on the power only after a thorough check.
Installation order:
Select the location;
Install the indoor unit;
Install the outdoor unit;
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
71
Installation the connecting pipe
Connect the drain pipe;
Wiring;
Test operation.
At delivery, the package of indoor and outdoor units should be checked and any damage should
be reported immediately to the service agent.
When handling the unit, take into account the following:
Fragile, handle the unit with care.
Move the unit as originally package as possible.
When lifting the unit, always use protectors to prevent belt damage and pay attention to the
position of the unit’s center of gravity.
2. Installation of the Indoor Units
2.1 Installating indoor units
As the following picture, when install the indoor unit, select the enough solid and level site
with enough space for installation and maintance.
The inspection orifice should be enough larger to repair and maintenance the unit.
Ensure that the minimum drain gradient is over 1/100.
Please refer to the following figure for the distance measurement between the screw bolts.
Please install with screw bolts. Use Ф10 or bigger screws.
The handling to the ceiling varies from constructions consult the construction personnels for
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
72
the specific procedures.
Cut off the roof beam. Strengthen the place cut off, and consolidate the roof beam.
Carry out the pipe and line operation in the ciling after finishing the installation of the main
body. While choosing where to start the operation, determine the direction of the pipes to be
drawn out. Especially in case there is a ceiling, position the refrigerant pipes, drain pipes,
indoor and outdoor lines to the connection places before hanging up the unit.
The distance between the four screw bolts:
MTA-18WN1: (Unit: mm)
MTA-24WN1, MTA-36WN1: (Unit: mm)
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
73
MTA-48WN1, MTA-60WN1: (Unit: mm)
When the pandant bolt is fixed in wooden structure, please put the square timber traversely
over the roof beam, then install the hanging screw boltes.
When in the new concrete bricks, inlaying or embedding the screw bolts.
For original concrete bricks, use embedding screw bolt, crock and stick harmess.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
74
For steel roof beam structre, install and use directly the supporting angle steel.
Overhang the indoor unit onto the hanging screw bolts with block. Position the indoor unit in
a float level by using the level indicator, otherwise it may cause water leakage.
2.2 Designing and connecting the duct
Check the filter of the indoor unit, and then install the canvas air passage underneath the
dust proof net.
Install a filter at an easy-to-maintain place such as intake pipe. If without the filter, the duct
will gether on the air heat exchanger and lead to fault and water leak of the air conditioner.
In order to suppress noise effectively, install noise suppression and sound insulation
devices, especially in the noise-sensitive spaces such as meeting rooms.
For connection of the flange plane, use non-flammable canvas adapter to prevent
transmission of vibration.
Air inlet and air outlet duct should be apart far enough to prevent air outlet entering air inlet.
Recommended duct connection
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
75
MTA-18WN1 (Unit: mm)
View of air outlet side
View of air inlet side from rear (Default)
View of air inlet side from down (Optional)
MTA-24WN1, MTA-36WN1 (Unit: mm)
View of air outlet side
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
76
View of air inlet side from rear (Default)
View of air inlet side from down (Optional)
MTA-48WN1, MTA-60WN1 (Unit: mm)
View of air outlet side
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
77
View of air inlet side
2.3 Install the drainage pipe
In order to prevent faults caused by condensate of the refrigerant pipe and drain pipe, perform
condensate prevention and heat insulation properly.
Hard PVC binder must be used for pipe connection, and make sure there is no leakage.
With the connection part to the indoor unit, please be noted not to impose pressure on the side
of indoor unit pipes.
For Model 48 and 60, the outlet has PTI screw bread, so please use sealing materials and pipe
sheath (fitting) when connecting PVC pipes.
Please use the accessory drain hose to connect the outlet of indoor unit with the PVC water pipe,
and then use the accessory clasp for chucking.
To prevent water from flowing backwards into the air conditioner while the air conditioner stops,
please lean the drainage pipe down toward outdoor (outlet-side) at a degree of over 1/100. And
please avoid any bulge or water deposit.
Do not drag the drainage pipe violently when connecting to prevent the body from being pulled.
Meanwhile, one supportpoint should be set every 0.8 - 1.0m to prevent the drainage pipe from
yielding. Or you can tie the drainage pipe with the connecting pipe to fix it.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
78
In case of prolonged drainage pipe, you had beeter tighten its indoor part with a protection tube
to prevent it from loosing.
The end of the drainage pipe should be over 50mm higher than the ground or the bottom of the
drainage chute, and do not immerse it in water. If you discharge the water directly into sewage,
be sure to make a U-form.
Charge water into water collection tray, after the drain water pipe is installed, check whether the
water can be drained smoothly and whether the joints are leakage.
After making sure that the water drains smoothly and no water is leaked, use a diabatic wool
bushes to preserve heat of the drain pipe. Ohterwise, condensate will occur.
3. Installation of Outdoor Units
Decide the correct way of conveying the equipment. Try to transport this unit with the original
package.
If the air conditioner needs to be installed on a metal part of the building, electric insulation must
be performed, and the installation must meet the relevant technical standards of electric devices.
Before install the outdoor unit, it should be checked first:
The appliance shall not be installed in laundry.
Install the unit where the air inlet and outlet are free from obstacles and strong wind.
Install the unit in a dry and well ventilated place.
Install the unit where the bearing surface is level and can bear weight of the unit, and is
suitable for installing the unit horizontally without increasing noise or vibration.
Install the unit where the operation noise and expelling of air do not affect neighbors.
Install the unit where no flammable gas is leaked.
Install the unit where it is convenient for pipe connection and electric connection.
Before obtaining access to terminals, all supply circuits must be disconnected.
The appliance must be positioned so that the plug is accessible.
The enclosure of the appliance shall be marked by word, or by symbols, with the direction of the
fluid flow.
The appliance shall be installed in accordance with national wiring regulations.
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
79
If the supply cord is damaged, it must be replaced by the manufacture or its service agent or a
similarly qualified person in order to avoid a hazard.
An all-pole disconnection switch having a contact separation of at least 3mm in all poles should
be connected in fixed wiring.
The temperature of refrigerant circuit will be high, please keep the interconnection cable avway
from the cooper tube.
This appliance can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in a safe way and understand
the hazards involved. Children shall not play with the appliance. Cleaning and usermaintenance
shall not be made by children without supervision.
Requirements for installing / Servicing R410A Equipment:
Gauge sets, hoses, refrigerant containers, and recovery system must be designed to handle
the POE or PVE type oils.
Manifold sets should be 800PSIG high side and 250PSIG low side with 550PSIG low side
restart.
All hoses must have a 700PSIG service pressure rating.
Leak detectors should be designed to detect R410A.
Recovery equipment (including refrigerant recovery containers) must be specifically
designed to handle R410A.
It will be more convenient to open the service valve after removing the underside clapboard.
Before starting the installation, select and check the suitablility of the location for outdoor unit.
Observe all limitations and clearnace requirements. The outdoor unit must have sufficient
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
80
clearance for air entrance to the condenser coil, for air discharge and for service access.
Notes: L1=1,000mm, L2=915mm.
For multiple unit installations, units must be spaced a minimum of 915mm apart. (Coil face to
face.
If the unit is to be installed on a hot sun exposed roof or a black-topped ground area, the unit
should be raised sufficiently above the roof or ground to avoid taking the accumulated layer of
hot air into the outdoor unit. At the same time, an adequated structural support for the unit is
necessary.
In case any obstacles exist above the outdoor unit, such obstacles must be 1,524mm above the
outdoor unit.
Ground installation:
The unit may be installed at ground level on a solid base that will not shift or settle, causing
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
81
strain on the refrigerant lines and possible leaks.
Install the unit in a level position.
Normal operating sound levels may be objectionable if the unit is placed directly under
windows of certain rooms, such as bedrooms, study rooms.
Top of the unit discharge area must be unrestricted for at least 1,530mm above the unit.
The outdoor unit should not be installed in an area where mud or ice could cause personal
injury or system damage.
Elevate the unit sufficiently to prevent any blockage of the air entrances by snow in areas
where there will be snow accumulation. Check the local weather bureau for the expected
snow accumulation in your area. Isolate the unit from rain gutters to avoid any possible
wash out of the foundation.
Roof installation:
When installing units on a roof, the structure must be capable of supporting the total weight
of the unit, including a padded frame unit, rails, etc., which should be used to minimize the
transmission of sound or vibration into the conditioned space.
Unit placement:
Provide a base in the pre-determined location.
Remove the shipping caryton and inspect for possible damage.
Compressor tie-down nuts should remain tighteded.
Position the unit on the base provided.
This system uses R410A refrigerant which operates at higher pressure than R22. No other
refrigerant may be used in this system. Gauge sets, hoses, refrigerant containers, and
recovery system must be designed to handle R410A.
The outdoor unit must be connected to the indoor coil using field supplied refrigerant grade
copper tubing that is internally clean and dry. Units should be installed only with the tubing
sizes for approved system combinations. The refrigerant charge shouwn in the nameplate is
for standard size interconnecting liquid line lengths up to 4.57m.
Using a larger than specified line size could result in oil return problems. Using a too small
line will result in loss of capacity and other problems caused by insufficient refrigerant flow.
Slope horizontal suction lines at least 4mm per 1m toward the outdoor unit to facilitate
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
82
proper oil return.
Factory-preferred tie-down method:
Prior to installing clear pad of debris. Then cement pad must meet local codes and must be
the proper thickness to accommodate fasteners.
Center and level unit onto pad.
Using field supplied L-shaped bracket to locate holes on concrete and drill pilot holes which
is at least 6.35mm deeper than fastener being used.
Self drilling screws to base pan should not exceed 9.52mm long to avoid damaging coil.
Using conventional practices to install brackets, tighten concrete fasteners and self-tapping
screws. (Brackets: 50mm width, 1.5mm thickness, height as required. Available from
distributor or in market place.)
Notes: These instructions are intended to provide a method to tie-down system to cement slab
as a securing procedure for high wind areas. It is recommended to check Local Codes for
tie-down methods and protocols.
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
83
4. Connection of Refrigerant Pipe
Refrigerant pipe sizing between indoor and outdoor unit.
Model
No.
Liquid /gas
pipe (mm)
Liquid Line Size - Outdoor unit higher than indoor unit
Total Equivalent Length (m)
7.62
15.24
22.86
30.48
38.10
45.72
54.86
Maximum Vertical Separation (m)
18
Φ9.52/Φ15.9
7.62
15.24
22.86
30.48
38.10
45.72
45.72
24
Φ9.52/Φ15.9
7.62
15.24
22.86
30.48
38.10
45.72
45.72
36
Φ9.52/Φ15.9
7.62
15.24
22.86
30.48
38.10
45.72
45.72
48
Φ9.52/Φ22
7.62
15.24
22.86
30.48
38.10
45.72
45.72
60
Φ9.52/Φ22
7.62
15.24
22.86
30.48
38.10
45.72
45.72
Model
No.
Liquid /gas
pipe (mm)
Liquid Line Size - Outdoor unit lower than indoor unit
Total Equivalent Length (m)
7.62
15.24
22.86
30.48
38.10
45.72
54.86
Maximum Vertical Separation (m)
18
Φ9.52/Φ15.9
7.62
15.24
17.98
17.37
16.76
16.15
15.54
24
Φ9.52/Φ15.9
7.62
15.24
18.90
18.59
18.29
17.68
17.06
36
Φ9.52/Φ15.9
7.62
15.24
22.86
18.90
18.59
17.98
17.37
48
Φ9.52/Φ22
7.62
15.24
15.85
14.63
13.11
11.58
9.75
60
Φ9.52/Φ22
7.62
15.24
14.33
12.50
10.36
8.53
6.70
Notes:
The maximum length of interconnecting line is 54.86m.
Always use the shortest length possible with a minimum number of bends.
Excessively long refrigerant lines cause loss of air conditioner capacity.
Keep the vertical lift to a minimum. Use the following guidelines when installing the unit:
1. Do not exceed the vertical lift as indicated on the table.
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
84
2. It is recommended to use the smallest liquid line size permitted to minimize system
charge which will maximize compressor reliability.
3. The above table may be used for sizing horizontal runs.
4. Do not exceed 45.72m maximum vertical separation.
It is suggested to install oil return bend per ten meter.
Indoor unit pipe connection:
Keep the coil connections sealed until refrigerant connections are made.
Indoor coil is shipped with No charge. Evacuate the system before charging with refrigerant.
Install refrigerant tubing so that it does not block service access to the front of the unit.
Nitrogen should flow through the refrigerant lines while brazing.
Use a brazing shield to protect the cabinet’s paint and a wet rag to protect the rubber
grommet from being damaged by torch flames.
After the refrigerant connections are made, seal the gap around the connections with
pressure sensitive gasket.
Be sure to cover all the exposed parts of the flare pipe joints and refrigerant pipe on the
liquid-side and the gas-side with insulating materials. Ensure that there is no gap between
them. Incomplete insulation may cause water condensation.
For MTA-18WN1, after connecting two pipes with copper nuts which are packed in indoor
unit accessory to indoor unit, another pipe packed in indoor unit accessory should be
welded with the gas connecting pipe of indoor unit.
Outdoor unit pipe connection:
Notes: Never attempt to repair any brazed connections while the system is under pressure.
Personal injury could result.
Remove the cap and Schrader core from both the liquid and suction service valve service
ports at the outdoor unit. Connect low pressure nitrogen to the liquid line service port.
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
85
Braze the liquid line to the liquid valve at the outdoor unit. Be sure to wrap the valve body
with a wet rag. Allow the nitrogen to continue flowing. Refer to the refrigerant pipe size list
for proper liquid line sizing.
Carefully remove the rubber plugs from the evaporator liquid and suction connections at the
indoor coil.
Braze the liquid line to the evaporator liquid connection. Nitrogen should be flowing through
the evaporator coil.
Slide the plastic cap away from the suction connection at the indoor coil. Braze the suction
line to the evaporator suction connection.
Protect the suction valve with a wet rag and braze the suction line connection to the outdoor
unit. The nitrogen flow should be exiting the system from the suction service port connection.
After this connection has cooled, remove the nitrogen source from the liquid fitting service
port.
Replace the Schrader core in the liquid and suction valves.
Leak test all refrigerant piping connections including the service port flare caps to be sure
they are leak tight.
Do not over tighten; it should be between 40 and 60 inch – lbs. maximum.
Evacuate the suction line, evaporator, and the liquid line, to 350 microns or less.
Replace cap on service ports. Do not remove the flare caps from the service ports except
when necessary for servicing the system.
Release the refrigerant charge into the system. Open both the liquid and suction valves by
removing the plunger cap and with an hex wrench back out counter-clockwise until valve
stem just touches the chamfered retaining wall.
Replace plunger cap finger tight, then tighten an additional 1/12 turn (1/2 hex flat).
Cap must be replaced to prevent leaks.
Install the lines with as few bends as possible. Care must be taken not to damage the
coupling or kink the tubing. Use clean hard drawn copper tubing where no appreciable
amount bending around obstruction is necessary, if soft copper must be used, care must be
taken to avoid sharp bends which may cause a restriction.
The refrigerant pipe cannot obstruct service access to the condenser, air handling system or
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
86
filter.
Care must also be taken to isolate the refrigerant pipes to minimize noise transmission from
the unit the structure.
The suction line must be insulated. Tape and suspend the refrigerant lines as shown in
following figure. Do not allow tube metal-to-metal contact.
Use PVC piping as a conduit for all underground installations. Buried lines should be kept as
short as possible to minimize the buildup of liquid refrigerant in the suction line during long
periods of shutdown.
Pack a sealing material such as perma gum around refrigerant lines where they penetrate a
wall to reduce vibration and to retain some flexibility.
Vacuum
It will be necessary to evacuate the system to 350 microns or less.
If a leak is suspected, leak test with dry nitrogen to locate the leak.
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
87
Repair the leak and test again.
To verify that the system has no leaks, simply close the valve to the vacuum pump suction
to isolate the pump and hold the system under vacuum. Watch the micron gauge for a few
minutes. If the micron gauge indicates a steady and continuous rise, it is an indication of a
leak. If the gauge shows a rise, then levels off after a few minutes and remains fairly
constant, its an indication that the system is leak free but still contains moisture and may
require further evacuation if the reading is above 350 microns.
After vacuum, according to the diameter and length of the connective pipe of liquid side between
the indoor unit and outdoor unit, calculate the refrigerant replenishment quantity. The refrigerant
for replenishment is R410A.
Diameter of liquid-side pipe
Quantity of refrigerant replenished for 1m
pipe length
Φ9.52mm
0.555kg
Notes:
Please check and record the replenished quantity of the air conditioner.
5. Heat Insulation of Refrigerant Pipe
In order to prevent faults caused by condensate of the refrigerant pipe and drain pipe, perform
condensate prevention and heat insulation properly. If it is forecast that high humidity and
temperature environment (Condensate temperature is over 23°C ) may exist in the ceiling, e.g., inside
the ceiling with slab, ceiling which is in the same environment as the outdoor air. It is necessary to
apply 10mm or thicker adiabatic wool (16~20kg/m2) to the refrigerant pipe and the drain pipe in
addition to applying the general heat insulation materials. Enough heat insulation materials should
also be applied to the refrigerant joint and the pipe joint.
Notes: The heat insulation of drain pipe refers to the installation of indoor unit.
Please use heat-resistant materials as heat insulation material of the air-side pipe. (e.g., EPT)
Cover heat insulation materials separately at the liquid side and the air side. Moreover, perform
heat insulation thoroughly for the air-side pipes of the indoor unit, and prevent water from
dripping outside the unit.
After applying the auxiliary heat insulation materials, use vinyl resin tape to seal refrigerant pipe
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
88
and drainage pipe to prevent water leak.
6. Electric Connection
6.1 Caution
Power supply of indoor unit and outdoor unit must be within normal voltage range.
Power wiring, control wiring, disconnect switches and over-current protection must be supplied
by the installer. Wire size should be sized per requirement.
The power cord type designation is H07RN-F.
Before connecting wire, please switch off the power supply. Otherwise, it may cause electric
shock.
External wiring of the indoor unit must be grounded that means power wire of outdoor unit shall
be connected with external grounding wire reliably.
Electrical wiring must be done by professionals, and wiring according to the wiring label.
Run power wiring from the disconnect switch to the unit.
Route wires from disconnect through power wiring opening provided and into the unit control
box.
Install the proper size time-delay fuses or circuit breaker, and make the power supply
connections.
Before electrical wiring, an all-pole disconnection device must be installed.
Install the electrical leakage device according to national regulation.
Power wires and communication wires shall be arranged orderly and reasonably without mutual
interfere. Connection pipes and valves should without mutual contact. In general, two wires
connection is not allowed, unless the welding joint is well welded and wrapped with insulating
tape.
Must select an appropriate connection wire according to the specification requirements. In
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
89
general, it is not allowed to parallel connection two wires, unless welding joint is well welded and
wrapped with insulating tape.
Every pole of the all-pole disconnection device should have at least 3mm separation distance
and a leakage protector with the rating current above 10mA shall be installed together when
wiring.
All electrical wiring is finished, power on as long as it is confirmed that all wires are connected
correctly and fixed tightly.
Notes:
For outdoor units, remove the screws at the side of the corner panel, and slide corner panel down
and remove from unit.
6.2 Specifications of power supply
Indoor units:
Model
MTA-18WN1
MTA-24WN1
MTA-36WN1
Power supply
220-240V~, 1Ph, 50Hz
220-240V~, 1Ph, 50Hz
220-240V~, 1Ph, 50Hz
Circuit breaker / Fuse
16A/10A
16A/10A
16A/10A
Power supply cable
3×2.5mm2
3×2.5mm2
3×2.5mm2
Connective wire of indoor
and outdoor unit
2×0.75mm2
2×0.75mm2
2×0.75mm2
Model
MTA-48WN1
MTA-60WN1
Power supply
220-240V~, 1Ph, 50Hz
220-240V~, 1Ph, 50Hz
Circuit breaker / Fuse
16A/10A
16A/10A
Power supply cable
3×2.5mm2
3×2.5mm2
Connective wire of indoor
and outdoor unit
2×0.75mm2
2×0.75mm2
Outdoor units:
Model
MOVTB-18CN1-13C
MOVTB-24CN1-13C
MOVTB-36CN1-13C
Power supply
220-240V~, 1Ph, 50Hz
220-240V~, 1Ph, 50Hz
220-240V~, 1Ph, 50Hz
Circuit breaker / Fuse
20A/20A
25A/25A
40A/40A
Power supply cable
3×2.5mm2
3×2.5mm2
3×4.0mm2
Connective wire of indoor
and outdoor unit
2×0.75mm2
2×0.75mm2
2×0.75mm2
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
90
Model
MOVTB-36CN1-R13C
MOVTB-48CN1-R13C
MOVTB-60CN1-R13C
Power supply
380-415V~, 3Ph, 50Hz
380-415V~, 3Ph, 50Hz
380-415V~, 3Ph, 50Hz
Circuit breaker / Fuse
15A/15A
20A/20A
25A/25A
Power supply cable
5×2.5mm2
5×2.5mm2
5×2.5mm2
Connective wire of indoor
and outdoor unit
2×0.75mm2
2×0.75mm2
2×0.75mm2
6.3 Schematic diagram
Notes:
Other thermostat with 220V signal and factory thermostat with 5V cannot be connected with
indoor unit together.
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
91
MTA-18WN1 + MOVTB-18CN1-13C
MTA-24WN1 + MOVTB-24CN1-13C, MTA-36WN1 + MOVTB-36CN1-13C
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
92
MTA-36WN1 + MOVTB-36CN1-R13C, MTA-48WN1 + MOVTB-48CN1-R13C
MTA-60WN1 + MOVTB-60CN1-R13C
7. Trial Run
The trial run must be carried out after the entire installation has been completed. Please confirm the
following points before the trial run:
The indoor unit and outdoor unit are installed properly.
Piping and wiring are correctly completed.
The drainage is unimpeded.
The ground wiring is connected correctly.
The lengths of the piping and the amount of recharged refrigerant have been recorded.
The power voltage fits the rated voltage of the air conditioner.
There is no obstacle at the air outlet and inlet of the indoor and outdoor units.
Check whether all valves are opened.
Pre-heated the air conditioner by power on.
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
93
8. Trouble shooting
Outdoor unit’s malfunction and protection codes
Content
LED1
LED2
LED3
Power supply phase sequence error
Flashing
Extinguished
Extinguished
Lack of Phase A, B of power supply
Flashing
Extinguished
Extinguished
Lack of Phase C of power supply
Extinguished
Extinguished
Extinguished
Low pressure protection
Flashing
Flashing
Extinguished
Over-current protection of compressor
Extinguished
Extinguished
Flashing
Communication error
Flashing
Extinguished
Flashing
Pipe temperature sensor (T3) error
Extinguished
Flashing
Flashing
Ambient temperature sensor (T4) error
Extinguished
Flashing
Extinguished
High pressure protection
Discharge temperature protection
High temperature of condenser protection
Flashing
Flashing
Flashing
Power supply phase sequence error
Lack of Phase A, B and C of power supply
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
94
Low pressure protection
Notes:
Low pressure protection is triggered 3 times in 20 minutes, the units should be repower
again to reset the unit.
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
95
Over-current protection of compressor
Communication error (Reserved)
Pipe temperature sensor (T3) error & Ambient temperature sensor (T4) error
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
96
High pressure protection & Discharge temperature protection
Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
97
High temperature of condenser protection
There is only one temperature is fixed in the indoor units with other thermostat, so these indoor
units without PCB board have not any error or protection code to display.
For the indoor unit Model 18, 24 and 36 with signal 12V wired controller, the malfunction and
protection codes (Shown in display board):
Content
Display content
Pipe temperature sensor (T2) error
E2
Room temperature sensor (T1) error
E3
Eeprom error
E7
For the indoor unit Model 48 and 60 with signal 5V wired controller, the malfunction and
protection codes:
MCAC-UTSM-201707 Midea Tropical R410A High Efficient Duct Technical Manual 50Hz
98
Content
Display content
Pipe temperature sensor (T2) error
Operation lamp flashing
Room temperature sensor (T1) error
Timer lamp flashing
Eeprom error
Operation and timer lamp flashing
Operation lamp flashing: Pipe temperature sensor (T2) error
Room temperature sensor (T1) error
Eeprom error
Loading...