Midea MTA-18WN1 Operating manual

Indoor unit

MTA-18WN1

MTA-24WN1

MTA-36WN1

MTA-48WN1

MTA-60WN1

Power supply

220-240V~ 1Ph 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:

MCAC-UTSM-201707

Technical Service Manual

Split AC

iOS Version Android Version

Midea CAC After-service Application

iOS Version

Midea CAC News Application

Add.: Midea Headquarters Building, 6 Midea Avenue, Shunde, Foshan, Guangdong, China

Postal code: 528311

Tel: +86-757-26338346 Fax: +86-757-22390205

cac.midea.com global.midea.com

Note: Product speciﬁcations change from time to time as product improvements and

developments are released and may vary from those in this document.

Commercial Air Conditioner Division

Midea Group

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 R410AHigh Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707

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-201707Midea Tropical R410A High Efficient Duct Technical Manual 50Hz

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 R410AHigh Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707

2.2 Outdoor unit

3. Nomenclature

3.1 Indoor unit:

MTA–18 WN1

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 –R13 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-201707Midea Tropical R410A High Efficient Duct Technical Manual 50Hz

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 R410AHigh Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707

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-201707Midea Tropical R410A High Efficient Duct Technical Manual 50Hz

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 R410AHigh Efficient Duct Technical Manual 50Hz MCAC-UTSM-201707

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-201707Midea Tropical R410A High Efficient Duct Technical Manual 50Hz

2. Specifications

Model

MTA-18WN1

Matched outdoor unit

MOVTB-18CN1-13C

Power supply

220 - 240V~, 1Ph, 50Hz

Cooling (T1)

Capacity

Btu/h

18,000

5,274

Input

1,552

EER

W/W

3.40

Btu/h.W

11.6

Cooling (T3)

Capacity

Btu/h

16,000

4,690

Input

1,975

EER

W/W

2.37

Btu/h.W

8.1

Rated input

120

Rated current

0.6

Indoor

fan motor

Model (×Quantity)

YKSS-61-4-62 (×1)

Brand

Matchwell/Yongan/Tongde

Input (Hi/Med/Lo)

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)

21×13.37

Fin space

1.3

Fin type

Hydrophilic aluminum fin

Tube size

Ф7

Tube type

Inner grooved copper pipe

Coil(W×H)

(955×147) + (955×147)

Number of circuits

Indoor air flow

m3/h

1,125/901/831

CFM

662/530/489

External static pressure

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

Ф9.52/Ф19.1

Max. equivalent

refrigerant pipe length

Max. difference in level

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