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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
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Midea Tropical R410A High Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707
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Part. 1 General information
1. Model Names of Indoor/Outdoor Units .................................. 2
2. External Appearance ............................................................. 2
3. Nomenclature ....................................................................... 3
4. Product features .................................................................... 4
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1. Model Names of Indoor/Outdoor Units
2. External Appearance
2.1 Indoor units
MTA-18WN1
MTA-24WN1, MTA-36WN1
MTA-48WN1, MTA-60WN1
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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
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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.
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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.).
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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
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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.
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2. Specifications
Power supply \ 220 - 240V~, 1Ph, 50Hz
Model (× Quantity) \ YKSS-61-4-62 (×1)
Input (Hi/Med/Lo) W 152/125/117
Tube pitch(a)×row pitch(b)
Tube type \ Inner grooved copper pipe
Refrigerant
pipe
Liquid side/ Gas side
Max. equivalent
refrigerant pipe length
Max. difference in level m 46
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Power wire (Indoor unit) \ 3×2.5mm2
Controller \ Optional (220V signal reserved)
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.
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Power supply \ 220 - 240V~, 1Ph, 50Hz
Model (× quantity) \ YSK200-4P (×1)
Input (Hi/Med/Lo) W (393/)332/278/234
Tube pitch(a)×row pitch(b)
Fin type \ Hydrophilic aluminum fin
Tube type \ Inner grooved copper pipe
Refrigerant
pipe
Liquid side/ Gas side
Max. equivalent
refrigerant pipe length
Max. difference in level m 46
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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.
Power wire (Indoor unit) \ 3×2.5mm2
Controller \ Optional (220V signal reserved)
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Power supply \ 220 - 240V~, 1Ph, 50Hz
Model (× quantity) \ YSK200-4P (×1)
Input (Hi/Med/Lo) W 393/332/278(/234)
Tube pitch(a)×row pitch(b)
Fin type \ Hydrophilic aluminum fin
Tube type \ Inner grooved copper pipe
Refrigerant
pipe
Liquid side/ Gas side
Max. equivalent
refrigerant pipe length
Max. difference in level m 46
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Power supply \ 220 - 240V~, 1Ph, 50Hz
Power wire (Indoor unit) \ 3×2.5mm2
Controller \ Optional (220V signal reserved)
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.
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Power supply \ 220 - 240V~, 1Ph, 50Hz
Model (× quantity) \ YSK200-4P (×1)
Input (Hi/Med/Lo) W 393/332/278(/234)
Tube pitch(a)×row pitch(b)
Fin type \ Hydrophilic aluminum fin
Tube type \ Inner grooved copper pipe
Refrigerant
pipe
Liquid side/ Gas side
Max. equivalent
refrigerant pipe length
Max. difference in level m 46
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Power wire (Indoor unit) \ 3×2.5mm2
Controller \ Optional (220V signal reserved)
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.
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Power supply \ 220 - 240V~, 1Ph, 50Hz
YSK400-4C-2 or YKSS-400-4-8 (×1)
(865/)701/621/545 or (930/)740/660/592
(1,125/)995/915/850 or (1,080/)920/850/790
Tube pitch(a)×row pitch(b)
Fin type \ Hydrophilic aluminum fin
Tube type \ Inner grooved copper pipe
Refrigerant
pipe
Liquid side/ Gas side
Max. equivalent
refrigerant pipe length
Max. difference in level m 46
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Power wire (Indoor unit) \ 3×2.5mm2
Controller \ Optional (220V signal reserved)
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.
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Power supply \ 220 - 240V~, 1Ph, 50Hz
YSK400-4C-2 or YKSS-400-4-8 (×1)
(865/)701/621/545 or (930/)740/660/592
(1,125/)995/915/850 or (1,080/)920/850/790
Tube pitch(a)×row pitch(b)
Fin type \ Hydrophilic aluminum fin
Tube type \ Inner grooved copper pipe
Refrigerant
pipe
Liquid side/ Gas side
Max. equivalent
refrigerant pipe length
Max. difference in level m 46
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Power wire (Indoor unit) \ 3×2.5mm2
Controller \ Optional (220V signal reserved)
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
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Top view
Left side view
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MTA-24WN1, MTA-36WN1 (Unit: mm)
Air outlet side view
Air inlet side view
Top view
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Left side view
(Unit: mm)
J K L M N O P T MTA-24WN1
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MTA-48WN1, MTA-60WN1 (Unit: mm)
Air outlet side view
Air inlet side view
Connecting pipe side view
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Top view
A view
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4. Service Space
Top view
5. Refrigerant circuit
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6. Wiring Diagrams
MTA-18WN1 (Other thermostat with 220V signal)
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MTA-24WN1 (Other thermostat with 220V signal)
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MTA-36WN1 (Other thermostat with 220V signal)