Midea MDTA-120CRN2, MDTA-96CRN2, MDFA-76CRN2, MDFA-96CRN2, MOV-76C-CN2 User Manual

MCAC-UTSM-12

1

Content

Part 1 General Information ........................................... 1

Part 2 Indoor Units ........................................................ 4

Part 3 Outdoor Units ................................................... 50

Part 4 Installation ........................................................ 65

Part 1 General Information

1. Model Names of Indoor/Outdoor Units ............................. 1

2. External Appearance .......................................................... 2

3. Nomenclature ................................................................ ..... 3

1. Model Names of Indoor/Outdoor Units

1.1 Model Names of Units with Cooling only:

Type

Indoor unit

Outdoor unit

Capacity

Model

Power supply

Model

Power supply

kW

kBtu/h

Floor-standing

type

MDFA-76CRN2

220~240V-

1N-50Hz

MOV-76C-CN2

380~415V-

3N-50Hz

22

76

MDFA-96CRN2

MOV-96C-CN2

28

96

Mid-static

pressure duct

type

MDTA-76CRN2

MOV-76C-CN2

22

76

MDTA-96CRN2

MOV-96C-CN2

28

96

MDTA-120CRN2

MOV-120C-CN2

380~400V-

3N-50Hz

35

120

MCAC-UTSM-12

Type

Indoor unit

Capacity

Model

Power supply

Model

Power supply

kW

kBtu/h

Floor-standing

type

MDFA-76HRN2

220~240V-

1N-50Hz

MOV-76H-CN2

380~415V-

3N-50Hz

22

76

MDFA-96HRN2

MOV-96H-CN2

28

96

Mid-static

pressure duct

type

MDTA-76HRN2

MOV-76H-CN2

22

76

MDTA-96HRN2

MOV-96H-CN2

28

96

MDTA-120HRN2

MOV-120H-CN2

380~400V-

3N-50Hz

35

120

MDTA-76C(H)RN2 MDTA-96C(H)RN2

MDTA-120C(H)RN2

1.2 Model Names of Units with Cooling and heating:

2. External Appearance

2.1 Indoor Units

Outdoor unit

MDFA-76C(H)RN2 MDFA-96C(H)RN2

2

MCAC-UTSM-12

MDOV-76C(H)-CN2 MDOV-96C(H)-CN2

MD T A – 76 C R N2

N2：R407C；N1：R410a

R：Remote Controller

Function Code: C: Cooling H: Cooling and Heating

Cooling Capacity (76 kBtu/h)

Product Series A: 1st

time design

B: 2nd

time design

Indoor Units T: Medium static pressure duct type F: Floor-standing type H: High static pressure duct type

MDV

2.2 Outdoor Unit

MDOV-120C(H)-CN2

3. Nomenclature

3.1 Indoor unit:

3

MD O V

76 C N2

3.2 Outdoor unit:

MCAC-UTSM-12

N2：R407C； N1：R410a

Function Code： C: Cooling Only H: Heat pump

Cooling Capacity (76 kBtu/h)

Universal Outdoor Unit

Outdoor Unit

MDV

Part 2 Indoor Units

Duct Type ................................................................................ 4

Floor-standing Type ............................................................. 31

Duct Type

1. Features .............................................................................. 5

2. Specifications ..................................................................... 5

3. Dimensions ......................................................................... 8

4. Service Space ..................................................................... 9

5. Refrigerant cycle Diagrams ............................................. 11

6. Wiring Diagrams ............................................................... 11

7.Capacity Table ................................................................... 15

8. Static Pressure ................................................................. 21

9. Electric Characteristics ................................................... 22

10. Sound Levels .................................................................. 23

12. Troubleshooting.............................................................24

4

Model

MDTA-76HRN2

MDTA-96CRN2

MDTA-96HRN2

Code

220070900191

220070900181

220070900171

Power supply

- 220~240V-1N-50Hz

220~240V-1N-50Hz

Rated input power

W 11500

11500 14500

14700

Rated current

A 20 20 28 28.1

Cooling Capacity

Btu/h 75,100

75,100

92,800

91,400

W 22000

22000 27200

26800

Input

W 7500

7500 9200

9200

EER W/W

2.93

2.93 2.96

2.91

Heating Capacity

Btu/h

——

83600

——

109500

W

——

24500

——

32100

Input

W

——

7320

——

9800

COP W/W

——

3.35

——

3.28

Indoor air flow

m3/h(CFM)

4650(2700)

5600(3300)

Indoor external static pressure

Pa

100 100 100

Indoor noise level

dB(A)

54 55 55

Refrigerant Type -

Control -

Capillary

Fan

Type -

Centrifugal fan

Fan model

-

SYZ9-9MD

Dimension

mm

Φ307 Φ307

Φ307

Drive type/ Motor step

-

Direct/ Single

Motor model

-

YDK300-4X

YDK550-4X

Motor Input * No.

W

720*2

1015*2

Motor speed

rpm 1040

1040 1300

1300

Coil

Type -

Copper tube and

aluminum fin

Copper tube and

aluminum fin

Copper tube and

aluminum fin

Copper tube and

aluminum fin

Tube size

mm

Ф9.52

Ф9.52 Ф9.52

Ф9.52

No. of rows

- 4 4 4 4

Fin per inch

FPI 17 17 17 17

Length* height

mm 1200*406

1200*406

Controller -

Remote controller

Drain pipe size

mm

Ф41

Ф41 Ф41

Ф41

Connection wiring

Power wiring

mm2

3*2.5

3*2.5 3*2.5

3*2.5

Signal wiring

mm2

2*1.0

4*1.0 2*1.0

4*1.0

Indoor unit Dimension

(W*H*D)

mm 1350*450*760

1350*450*760

Packing (W*H*D)

mm 1549*476*917

1549*476*917

Net/Gross weight

kg 105/120

105/120

2. Specifications

MCAC-UTSM-12

MDTA-76CRN2

220070900201

100

54

R407C

Capillary

Centrifugal fan

SYZ9-9MD

Φ307

R407C R407C R407C

Notes:

1. ESP: external static pressure

2. Nominal cooling capacities are based on the following conditions: Indoor temp: 27°CDB, 19°CWB; Outdoor temp: 35°CDB, 24°CWB; Equivalent refrigerant piping: 7.5m (horizontal).

3. Nominal heating capacities are based on the following conditions: Indoor temp: 20°CDB, 15°CWB; Outdoor temp: 7°CDB, 6°CWB; Equivalent refrigerant piping: 7.5m (horizontal).

6

Direct/ Single

YDK300-4X

720*2

MCAC-UTSM-12

Model

MDTA-120HRN2

Code

220070900151

Power supply - 220~240V-1N-50Hz

Rated input power

W

18000

Rated current A 28.7

28.7

Cooling Capacity

Btu/h

116,000

W

34000

Input

W

11900

EER

W/W

2.86

Heating Capacity

Btu/h

——

139900

W

——

41000

Input

W

——

12600

COP

W/W

——

3.25

Indoor air flow

m3/h

6800

Indoor external static pressure

150

Indoor noise level

56

Refrigerant Type

Control

Capillary

Fan

Type

Centrifugal fan

Fan model

SYZ9-9MD

Dimension

Φ307

Drive type/ Motor step

Direct/ Single

Motor model

YDK300-4X

Motor Input * No.

720*3

Motor speed

rpm

1040/930/825

Coil

Type

-

Copper tube and

aluminum fin

Copper tube and

aluminum fin

Tube size

mm

Ф7

No. of rows - 4

4

Fin per inch

FPI

17

Length* height

mm

1602*588

Controller

-

Remote controller

Drain pipe size

mm

Ф41

Connection wiring

Power wiring

mm2

3*2.5

Signal wiring

mm2

2*1.0

4*1.0

Indoor unit Dimension

(W*H*D)

mm

1828*638*858

Packing (W*H*D)

mm

2095*689*929

Net/Gross weight

kg

188/220

MDTA-120CRN2

220070900161

Pa 150

dB(A) 56

-

- Capillary

- Centrifugal fan

- SYZ9-9MD

mm Φ307

R407C R407C

- Direct/ Single

- YDK300-4X

W 720*3

Notes:

1. ESP: external static pressure

2. Nominal cooling capacities are based on the following conditions: Indoor temp: 27°CDB, 19°CWB; Outdoor temp: 35°CDB, 24°CWB; Equivalent refrigerant piping: 7.5m (horizontal).

3. Nominal heating capacities are based on the following conditions: Indoor temp: 20°CDB, 15°CWB; Outdoor temp: 7°CDB, 6°CWB; Equivalent refrigerant piping: 7.5m (horizontal).

7

MCAC-UTSM-12

3. Dimensions

3.1 MDTA-76C(H)RN2, MDTA-96C(H)RN2

8

MCAC-UTSM-12

3.2 MDTA-120C(H)RN2

9

4. Service Space

MCAC-UTSM-12

m m

0

5

≥

Electric control box

Inspection hole

m m

0

6

≥

Top view Side view

10

ir outlet

Muffle

Canvas adapter

Inspection

Air duct system

hole

Air inlet

Air filter

Muffle

MCAC-UTSM-12

5. Refrigerant cycle diagrams

5.1 Cooling only: MDTA-76CRN2, MDTA-96CRN2, MDTA-120CRN2

Cooling

Outdoor heat-exchanger

HP Switch

Discharge temp. sensor

Compressors

LP Switch

Liquid-gas seperator

T3

Stop valve

5.3 Cooling and heating: MDTA-76HRN2, MDTA-96HRN2, MDTA-120HRN2

Stop valve

Indoor unit

Capillary

Indoor heat-exchanger

T2

T4

Cooling Heating

Outdoor heat-exchanger

HP Switch

4-way valve

Discharge temp. sensor

Compressors

LP Switch

Liquid-gas seperator

T3

Check valve

Stop valve

Capillary

Indoor unit

Indoor

heat-exchanger

Stop valve

T2

T4

11

MCAC-UTSM-12

6. Wiring Diagrams

6.1 MDTA-76CRN2, MDTA-96CRN2

12

MCAC-UTSM-12

6.2 MDTA-76HRN2, MDTA-96HN2

6.3 MDTA-120CRN2

13

6.4 MDTA-120HRN2

MCAC-UTSM-12

14

MCAC-UTSM-12

Gross Cooling Capacity (kW)

Outdoor DB(°C)

29.40

35.00

Indoor

WB(°C)

16.10

19.40

22.80

16.10

19.40

22.80

CFM

DB(°C)

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

2200

23.90

19.2

15.0

7.13

21.7

12.2

7.33

23.0

5.3

7.46

18.4

15.1

7.56

20.5

11.6

7.79

21.8

5.0

7.93

26.70

19.9

17.2

7.15

7.48

18.8

17.1

7.58

20.9

13.5

7.81

22.2

9.6

29.40

20.6

18.7

7.17

7.5

19.2

18.4

7.6

21.3

17.5

7.83

22.6

13.5

32.20

21.3

20.9

7.19

7.52

19.6

19.2

7.62

21.7

19.8

7.85

23.1

17.0

2500

23.90

20.3

16.2

7.33

7.66

19.4

16.3

7.76

21.1

12.2

7.99

22.4

5.3

26.70

21.0

18.3

7.35

7.68

19.8

18.3

7.78

21.5

15.3

8.01

22.8

10.0

29.40

21.7

20.1

7.37

7.7

20.2

19.8

7.8

21.9

18.4

8.03

23.3

14.2

32.20

22.5

21.4

7.39

23.6

21.9

7.59

25.1

18.7

7.72

20.6

7.82

22.4

20.7

8.05

23.7

17.7

8.19

2700

23.90

20.8

18.1

7.57

22.8

14.2

7.9

24.1

6.3

7.9

19.9

18.3

8

21.6

13.5

8.23

22.8

5.9

8.37

26.70

21.5

20.5

7.59

23.2

17.9

7.79

24.6

11.8

7.92

20.3

8.02

22.0

16.9

8.25

23.3

11.2

8.39

29.40

22.3

21.6

7.61

23.7

21.7

7.81

25.1

16.6

7.94

20.7

8.04

22.4

20.6

8.27

23.8

15.7

8.41

32.20

23.0

22.6

7.63

24.1

21.9

7.83

25.6

20.8

7.96

21.1

8.06

22.9

20.8

8.29

24.2

19.7

8.43

3000

23.90

21.3

18.8

7.88

23.2

13.9

8.08

24.6

6.0

8.21

20.7

18.3

8.31

22.1

13.2

8.54

23.3

5.7

8.68

26.70

22.0

21.2

7.9

23.7

17.4

8.1

25.1

11.4

8.23

21.1

20.3

8.33

22.5

16.5

8.56

23.8

10.8

8.7

29.40

22.8

22.1

7.92

24.2

21.0

8.12

25.6

16.2

8.25

21.5

8.35

23.0

20.0

8.58

24.3

15.4

8.72

32.20

23.6

23.1

7.94

24.7

23.7

8.14

26.1

20.2

8.27

22.0

8.37

23.4

22.5

8.6

24.8

19.2

8.74

7. Capacity Table

7.1 76 kBtu/h

22.1 14.3 7.35 23.5 10.1

22.5 18.5 7.37 24.0 14.3

23.0 20.9 7.39 24.4 18.0

22.3 12.9 7.53 23.6 5.6

22.7 16.1 7.55 24.1 10.6

23.2 19.5 7.57 24.6 15.0

7.95

7.97

7.99

8.13

8.15

8.17

15

MCAC-UTSM-12

Gross Cooling Capacity (kW)

Outdoor DB(°C)

40.60

46.10

51.70

Indoor

WB(°C)

16.10

19.40

22.80

16.10

19.40

22.80

16.10

19.40

22.80

CFM

DB(°C)

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

2200

23.9

18.41

15.09

8.49

19.98

11.29

8.73

21.25

4.91

8.88

16.9

13.9

8.68

18.4

10.4

8.94

19.6

4.5

9.19

16.1

13.2

10.67

17.3

9.8

11.03

18.4

4.3

11.28

26.7

18.78

17.07

8.51

20.38

13.2

8.75

21.68

9.34

8.9

17.3

15.7

8.7

18.8

12.2

8.96

20.0

8.6

9.21

16.4

14.9

10.7

17.7

11.5

11.06

18.8

8.1

11.31

29.4

19.16

18.42

8.53

20.79

17.04

8.77

22.11

13.16

8.92

17.6

17.0

8.72

19.2

15.7

8.98

20.4

12.1

9.23

16.7

16.1

10.73

18.0

14.8

11.09

19.2

11.4

11.34

32.2

19.54

19.16

8.55

21.2

19.28

8.79

17.8

9

20.8

15.3

9.26

17.0

16.7

10.75

18.4

16.7

11.12

19.5

2500

23.9

19.02

15.98

8.69

20.59

11.9

8.93

11.0

9.14

20.2

4.8

9.39

16.7

14.0

10.87

17.9

10.4

11.23

19.0

26.7

19.4

17.96

8.71

21

14.89

8.95

13.8

9.16

20.6

9.0

9.41

17.0

15.7

10.9

18.3

13.0

11.26

19.4

29.4

19.79

19.4

8.73

21.42

18

8.97

16.6

9.18

21.0

12.8

9.43

17.3

17.0

10.93

18.7

15.7

11.29

19.8

32.2

20.18

8.75

21.85

20.23

8.99

18.7

9.21

21.4

16.0

9.46

17.7

10.95

19.0

17.6

11.32

20.2

2700

23.9

19.51

17.9

8.39

21.08

13.17

8.78

12.2

9.38

20.7

5.4

9.63

17.2

15.7

11.11

18.4

11.5

11.47

19.5

26.7

19.9

8.41

21.5

16.54

8.65

15.3

9.4

21.1

10.1

9.65

17.5

11.14

18.8

14.5

11.5

19.9

29.4

20.3

8.43

21.93

20.12

8.67

23.26

15.4

8.82

18.8

9.16

20.3

18.6

9.42

21.5

14.3

9.67

17.9

11.17

19.2

17.6

11.53

20.3

13.4

11.78

32.2

20.7

8.45

22.37

20.34

8.69

23.72

19.29

8.84

19.1

9.19

20.7

18.8

9.45

22.0

17.9

9.7

18.2

11.2

19.6

17.8

11.56

20.7

16.8

11.81

3000

23.9

20

17.7

9.24

21.57

12.92

9.48

22.84

5.6

9.63

18.5

16.4

9.43

20.0

12.0

9.69

21.2

5.2

9.94

17.7

15.6

11.42

18.9

11.3

11.78

20.0

4.9

12.03

26.7

20.4

19.62

9.26

22

16.18

9.5

23.3

10.59

9.65

18.9

18.2

9.45

20.4

15.0

9.71

21.6

9.8

9.96

18.0

17.3

11.45

19.3

14.2

11.81

20.4

9.3

12.06

29.4

20.81

9.28

22.44

19.51

9.52

23.77

15.04

9.67

19.3

9.47

20.8

18.1

9.73

22.0

13.9

9.98

18.4

11.48

19.7

17.1

11.84

20.8

13.2

12.09

32.2

21.22

9.31

22.89

22.01

9.55

24.24

18.79

9.7

19.7

9.5

21.2

20.4

9.76

22.5

17.4

10.01

18.7

11.51

20.1

19.3

11.87

21.2

16.5

12.12

22.56 16.59 8.94 18.0 17.6 8.74 19.5

21.86 5.16 9.08 17.6 14.8 8.88 19.0

22.3 9.78 9.1 17.9 16.6 8.9 19.4

22.75 13.87 9.12 18.3 17.9 8.92 19.8

23.2 17.31 9.15 18.6 18.6 8.94 20.2

22.35 5.79 8.78 18.0 16.6 9.12 19.5

22.8 10.91 8.8 18.4 18.4 9.14 19.9

Notes:

1. DB = Dry Bulb Temperature (°C), WB = Wet Bulb Temperature (°C)

4. TGC = Total Cooling Capacity (kW)

5. SHC = Sensible Heating Capacity (kW)

6. PI = Power Input (kW)

14.4 11.37

4.5 11.48

8.5 11.51

12.1 11.54

15.1 11.57

5.1 11.72

9.5 11.75

16

MCAC-UTSM-12

Gross Cooling Capacity (kW)

Outdoor DB(°C)

29.40

35.00

Indoor

WB(°C)

16.10

19.40

22.80

16.10

19.40

22.80

CFM

DB(°C)

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

2700

23.9

24.3

19.0

9.38

26.8

15.1

9.58

28.1

6.5

9.71

23.5

19.3

9.81

25.6

14.5

10.03

26.8

6.2

10.17

26.7

25.1

21.6

9.4

27.3

17.7

9.6

28.7

12.4

9.73

24.0

21.8

9.83

26.1

16.9

10.06

27.4

11.8

10.2

29.4

26.0

23.6

9.42

27.8

22.8

9.62

29.3

17.4

9.75

24.5

23.5

9.85

26.6

21.8

10.09

27.9

16.6

10.23

32.2

26.9

26.4

9.45

9.78

25.0

24.5

9.88

27.1

24.7

10.11

28.5

21.0

3000

23.9

25.3

20.3

9.58

9.91

24.5

20.6

10

26.2

15.1

10.23

27.5

6.5

26.7

26.2

22.8

9.6

9.93

25.0

23.2

10.03

26.7

18.9

10.26

28.0

12.3

29.4

27.1

25.1

9.62

9.95

25.5

25.0

10.06

27.2

22.9

10.29

28.6

17.4

32.2

28.1

26.7

9.65

9.98

26.0

10.08

27.8

25.7

10.31

29.1

21.7

3260

23.9

25.8

22.4

9.82

10.14

25.0

22.9

10.24

26.7

16.7

10.47

27.9

7.2

26.7

25.4

9.84

28.4

21.9

10.04

29.8

14.3

10.17

25.5

10.27

27.2

20.9

10.5

28.5

13.6

10.64

29.4

27.6

26.8

9.86

29.0

26.6

10.07

30.4

20.1

10.2

26.0

10.3

27.7

25.5

10.53

29.1

19.3

10.67

32.2

28.6

28.0

9.89

29.6

26.9

10.09

31.0

25.2

10.22

26.5

10.32

28.3

25.7

10.55

29.7

24.1

10.69

3500

23.9

26.3

23.3

10.12

28.3

17.0

10.32

29.7

7.3

10.45

25.8

22.8

10.55

27.2

16.3

10.78

28.4

7.0

10.92

26.7

27.2

26.2

10.15

28.9

21.3

10.35

30.3

13.8

10.48

26.3

25.3

10.58

27.7

20.4

10.81

29.0

13.2

10.95

29.4

28.2

27.3

10.18

29.5

25.6

10.38

30.9

19.6

10.51

26.8

10.61

28.3

24.6

10.84

29.6

18.7

10.98

32.2

29.1

28.6

10.2

30.1

28.9

10.4

31.5

24.4

10.53

27.4

10.63

28.8

27.7

10.86

30.2

23.4

11

7.1 96 kBtu/h

28.4 25.8 9.65 29.8 21.9

27.4 15.8 9.78 28.7 6.8

27.9 19.8 9.8 29.3 12.9

28.5 23.9 9.82 29.9 18.2

29.0 26.9 9.85 30.5 22.8

27.8 17.4 10.14 29.2 7.6

10.25

10.37

10.4

10.43

10.45

10.61

17

MCAC-UTSM-12

Gross Cooling Capacity (kW)

Outdoor DB(°C)

40.60

46.10

51.70

Indoor

WB(°C)

16.10

19.40

22.80

16.10

19.40

22.80

16.10

19.40

22.80

CFM

DB(°C)

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

2700

23.9

23.8

19.5

10.85

25.4

14.3

11.09

26.7

6.2

11.24

22.3

18.3

11.04

23.8

13.5

11.3

25.0

5.8

11.55

19.6

16.1

12.37

20.9

11.8

12.73

21.9

5.1

12.98

26.7

24.3

22.1

10.88

25.9

16.8

11.12

27.2

11.7

11.27

22.8

20.7

11.07

24.3

15.7

11.33

25.5

11.0

11.58

20.0

18.2

12.4

21.3

13.8

12.76

22.4

9.7

13.01

29.4

24.8

23.8

10.91

26.4

21.6

11.15

27.7

16.5

11.3

23.2

22.3

11.1

24.8

20.3

11.36

26.0

15.5

11.61

20.4

19.6

12.43

21.7

17.8

12.79

22.8

13.6

13.04

32.2

25.3

24.8

10.93

26.9

24.5

11.18

28.3

20.8

11.33

23.7

23.2

11.13

25.3

23.0

11.39

26.5

19.5

11.64

20.8

20.4

12.46

22.1

20.1

12.82

23.3

17.1

13.08

3000

23.9

24.4

20.5

11.05

26.0

15.0

11.29

14.1

11.5

25.6

6.0

11.75

20.2

17.0

12.57

21.5

12.4

12.93

22.6

26.7

24.9

23.1

11.08

26.5

18.8

11.32

17.7

11.53

26.1

11.5

11.78

20.6

19.1

12.6

21.9

15.5

12.96

23.0

29.4

25.4

24.9

11.11

27.0

22.7

11.35

21.3

11.56

26.6

16.2

11.81

21.0

20.6

12.63

22.3

18.8

12.99

23.5

32.2

25.9

11.14

27.6

25.5

11.38

24.0

11.59

27.2

20.3

11.84

21.4

12.66

22.8

21.1

13.02

23.9

3260

23.9

24.9

22.9

11.29

26.5

16.5

11.68

15.6

11.74

26.1

6.8

11.99

20.7

19.0

12.81

22.0

13.7

13.17

23.0

26.7

25.4

11.32

27.0

20.8

11.56

19.5

11.77

26.6

12.7

12.02

21.1

12.84

22.4

17.2

13.2

23.5

29.4

25.9

11.35

27.5

25.3

11.59

28.9

19.1

11.74

24.4

11.54

25.9

23.8

11.8

27.1

18.0

12.05

21.5

12.87

22.9

21.0

13.23

24.0

15.9

13.48

32.2

26.4

11.38

28.1

25.5

11.62

29.4

23.9

11.77

24.9

11.57

26.4

24.0

11.83

27.7

22.5

12.08

22.0

12.9

23.3

21.2

13.27

24.5

19.9

13.52

3500

23.9

25.4

22.5

11.6

27.0

16.1

11.84

28.2

6.9

11.99

23.9

21.2

11.79

25.4

15.2

12.05

26.6

6.5

12.3

21.2

18.7

13.12

22.5

13.4

13.48

23.5

5.8

13.73

26.7

25.9

24.9

11.63

27.5

20.2

11.87

28.8

13.1

12.02

24.4

23.5

11.82

25.9

19.0

12.08

27.1

12.3

12.33

21.6

20.8

13.15

22.9

16.8

13.51

24.0

10.9

13.76

29.4

26.4

11.66

28.1

24.4

11.9

29.4

18.6

12.05

24.9

11.85

26.4

23.0

12.11

27.6

17.5

12.36

22.0

13.18

23.4

20.3

13.54

24.5

15.5

13.79

32.2

27.0

11.69

28.6

27.5

11.93

30.0

23.2

12.08

25.4

11.88

27.0

25.9

12.14

28.2

21.9

12.39

22.5

13.22

23.8

22.9

13.58

25.0

19.4

13.83

27.3 6.4 11.44 22.9 19.3 11.24 24.4

27.8 12.2 11.47 23.4 21.7 11.27 24.9

28.4 17.3 11.5 23.9 23.4 11.3 25.4

28.9 21.6 11.53 24.4 24.4 11.33 25.9

27.8 7.2 11.68 23.4 21.5 11.48 24.9

28.3 13.5 11.71 23.9 23.9 11.51 25.4

Notes:

1. DB = Dry Bulb Temperature (°C), WB = Wet Bulb Temperature (°C)

4. TGC = Total Cooling Capacity (kW)

5. SHC = Sensible Heating Capacity (kW)

6. PI = Power Input (kW)

18

5.3 13.18

10.1 13.21

14.3 13.24

17.9 13.28

6.0 13.42

11.2 13.45

MCAC-UTSM-12

Gross Cooling Capacity (kW)

Outdoor DB(°C)

29.40

35.00

Indoor

WB(°C)

16.10

19.40

22.80

16.10

19.40

22.80

CFM

DB(°C)

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

3300

23.9

30.8

24.1

11.97

33.4

18.9

12.17

34.8

8.0

12.3

30.2

24.8

12.4

32.2

18.2

12.63

33.5

7.7

12.77

26.7

31.9

27.5

12

34.1

22.1

12.2

35.5

15.3

12.33

30.8

28.0

12.43

32.9

21.3

12.66

34.2

14.7

12.8

29.4

33.0

30.0

12.03

34.8

28.5

12.23

36.2

21.5

12.36

31.4

30.2

12.46

33.5

27.5

12.69

34.9

20.8

12.83

32.2

34.2

33.5

12.06

12.39

32.0

31.4

12.49

34.2

31.1

12.72

35.6

26.2

3700

23.9

31.9

25.5

12.17

12.5

31.2

26.2

12.6

32.8

19.0

12.83

34.1

8.1

26.7

33.0

28.7

12.2

12.53

31.8

29.4

12.63

33.5

23.8

12.86

34.8

15.3

29.4

34.2

31.6

12.23

12.56

32.4

31.8

12.66

34.2

28.7

12.89

35.5

21.6

32.2

35.4

33.7

12.26

12.59

33.1

12.69

34.9

32.3

12.92

36.2

27.0

4000

23.9

32.4

28.2

12.41

12.74

31.7

29.1

12.84

33.3

20.8

13.07

34.6

9.0

26.7

33.5

31.9

12.44

35.2

27.1

12.64

36.6

17.5

12.77

32.3

12.87

34.0

26.2

13.1

35.3

16.9

13.24

29.4

34.7

33.7

12.47

35.9

32.9

12.67

37.3

24.7

12.8

33.0

12.9

34.7

31.8

13.13

36.0

23.9

13.27

32.2

35.9

35.2

12.5

36.6

33.3

12.7

38.1

31.0

12.83

33.6

12.93

35.4

32.2

13.17

36.7

29.9

13.31

4500

23.9

32.9

29.1

12.72

35.0

21.0

12.92

36.4

8.9

13.05

32.5

28.7

13.15

33.8

20.3

13.38

35.1

8.6

13.52

26.7

34.0

32.7

12.75

35.7

26.3

12.95

37.1

16.9

13.08

33.1

31.8

13.18

34.5

25.4

13.41

35.8

16.3

13.55

29.4

35.2

34.2

12.78

36.4

31.7

12.98

37.8

24.0

13.11

33.8

13.21

35.2

30.6

13.44

36.5

23.1

13.58

32.2

36.4

35.7

12.81

37.1

35.7

13.01

38.6

29.9

13.15

34.4

13.25

35.9

34.5

13.48

37.3

28.9

13.62

7.3 120 kBtu/h

35.5 32.2 12.26 36.9 27.1

34.0 19.7 12.37 35.4 8.4

34.7 24.6 12.4 36.1 15.8

35.4 29.7 12.43 36.8 22.5

36.1 33.4 12.46 37.6 28.0

34.5 21.6 12.74 35.9 9.3

12.86

12.97 13

13.03

13.07

13.21

19

MCAC-UTSM-12

Gross Cooling Capacity (kW)

Outdoor DB(°C)

40.60

46.10

51.70

Indoor

WB(°C)

16.10

19.40

22.80

16.10

19.40

22.80

16.10

19.40

22.80

CFM

DB(°C)

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

3300

23.9

29.8

24.4

14.37

31.4

17.7

14.61

32.6

7.5

14.76

28.3

23.2

14.56

29.8

16.8

14.82

31.0

7.2

15.07

29.5

24.2

16.36

30.8

17.4

16.72

31.8

7.4

16.97

26.7

30.4

27.6

14.41

32.0

20.7

14.65

33.3

14.3

14.8

28.9

26.3

14.6

30.4

19.7

14.86

31.6

13.6

15.11

30.1

27.4

16.4

31.4

20.3

16.76

32.5

14.0

17.01

29.4

31.0

29.8

14.45

32.6

26.7

14.69

34.0

20.2

14.84

29.5

28.3

14.64

31.0

25.4

14.9

32.2

19.2

15.15

30.7

29.5

16.44

32.0

26.2

16.8

33.1

19.7

17.05

32.2

31.6

31.0

14.48

33.3

30.3

14.72

34.6

25.5

14.87

30.1

29.5

14.67

31.6

28.7

14.93

32.9

24.2

15.19

31.3

30.7

16.48

32.7

29.7

16.84

33.8

24.9

17.1

3700

23.9

30.4

25.5

14.57

32.0

18.5

14.81

30.4

17.6

15.02

31.6

7.5

15.27

30.1

25.3

16.56

31.4

18.1

16.92

32.5

26.7

31.0

28.7

14.61

32.6

23.1

14.85

31.0

22.0

15.06

32.2

14.1

15.31

30.7

28.4

16.6

32.0

22.7

16.96

33.1

29.4

31.6

31.0

14.65

33.3

27.9

14.89

31.6

26.6

15.1

32.8

20.0

15.35

31.3

30.7

16.64

32.6

27.4

17

33.8

32.2

32.3

14.68

33.9

31.4

14.92

32.3

29.9

15.14

33.5

25.0

15.39

31.9

16.68

33.3

30.8

17.04

34.4

4000

23.9

30.9

28.3

14.27

32.5

20.3

14.66

30.9

19.3

15.26

32.1

8.3

15.51

30.6

28.1

16.8

31.9

19.9

17.16

32.9

26.7

31.5

14.31

33.1

25.5

14.55

31.5

24.2

15.3

32.7

15.7

15.55

31.2

16.84

32.5

25.0

17.2

33.6

29.4

32.1

14.35

33.8

31.0

14.59

35.1

23.2

14.74

30.6

15.08

32.1

29.5

15.34

33.4

22.1

15.59

31.8

16.88

33.2

30.4

17.24

34.3

22.7

17.49

32.2

32.8

14.38

34.4

31.3

14.62

35.8

29.1

14.77

31.2

15.12

32.8

29.8

15.38

34.0

27.7

15.63

32.5

16.92

33.8

30.7

17.29

35.0

28.4

17.54

4500

23.9

31.4

27.8

15.12

32.9

19.7

15.36

34.2

8.4

15.51

29.9

26.5

15.31

31.4

18.8

15.57

32.6

8.0

15.82

31.1

27.5

17.11

32.4

19.4

17.47

33.4

8.2

17.72

26.7

32.0

30.8

15.16

33.6

24.7

15.4

34.9

15.9

15.55

30.5

29.3

15.35

32.0

23.5

15.61

33.2

15.1

15.86

31.7

30.5

17.15

33.0

24.3

17.51

34.1

15.5

17.76

29.4

32.6

15.2

34.3

29.8

15.44

35.6

22.5

15.59

31.1

15.39

32.6

28.4

15.65

33.9

21.4

15.9

32.3

17.19

33.7

29.3

17.55

34.8

22.0

17.8

32.2

33.3

15.24

35.0

33.6

15.48

36.3

28.2

15.63

31.7

15.43

33.3

32.0

15.69

34.5

26.8

15.94

33.0

17.24

34.3

33.0

17.6

35.5

27.5

17.85

33.2 7.8 14.96 28.9 24.3 14.76

33.9 14.9 15 29.5 27.3 14.8

34.6 21.1 15.04 30.1 29.5 14.84

35.3 26.3 15.08 30.7 30.7 14.87

33.7 8.7 14.66 29.4 27.0 15

34.4 16.5 14.7 30.0 30.0 15.04

Notes:

1. DB = Dry Bulb Temperature (°C), WB = Wet Bulb Temperature (°C)

4. TGC = Total Cooling Capacity (kW)

5. SHC = Sensible Heating Capacity (kW)

6. PI = Power Input (kW)

20

7.7 17.17

14.5 17.21

20.6 17.25

25.7 17.3

8.5 17.41

16.1 17.45

MCAC-UTSM-12

8. Air flow rate- Static pressure curve

8.1 76kBtu/h

8.2 96kBtu/h

200

180

160

140

120

100

Static Pressure (Pa)

Low

80

60

40

20

0

3250 3500 3750 4000 4250 4500 4750 5000

Medium

High

AirFlow (m3/h)

5250 5500

8.3 120kBtu/h

200 180 160

140

120 100

Static Pressure (Pa)

Low

80 60

40

20

0

3800 4050 4300 4550 4800 5050 5300 5550 5800 6050 6300

Medium

High

AirFlow (m3/h)

200

180

160

140

120

100

80

60

40

Static Pressure (Pa)

20

0

5000 5300 5600 5900 6200 6500 6800 7100 7400 7700 8000

Low

Medium

High

Air Flow (m3/h)

21

MCAC-UTSM-12

Model

Indoor Unit

Power Supply

IFM

Hz Voltage

MCA

MFA kW FLA

MDTA-76CRN2

50 220-240

10

8

1.42

6.66

MDTA-76HRN2

50 220-240

10

8

1.42

6.66

MDTA-96CRN2

50 220-240

10

12

1.8 8.6

MDTA-96HRN2

50 220-240

10

12

1.8 8.6

MDTA-120CRN2

50 220-240

11.25

20

2.1 10

MDTA-120HRN2

50 220-240

198 254 11.25

20

2.1 10

Model

Outdoor Unit

Power Supply

Compressor

OFM

Hz Voltage

Min.

Max. MCA

TOCA MFA

MSC RLA KW FLA MDOV-76C-CN2

50 380-415

342 438 15.75

18.5 21.85

48*2 6.3*2

0.573

2.613

MDOV-76H-CN2

50 380-415

342 438 15.75

18.5 21.85

48*2 6.3*2

0.573

2.613

MDOV-96C-CN2

50 380-415

342 438 20 28 30 53*2 8.0*2 0.573

2.613

MDOV-96H-CN2

50 380-415

342 438 20 28 30 53*2 8.0*2 0.573

2.613

MDOV-120C-CN2

50 380-415

342 438 22.75

28.7 32.55

57*2 9.1*2 1.2

5.857

MDOV-120H-CN2

50 380-415

342 438 22.75

28.7 32.55

57*2 9.1*2 1.2

5.857

9. Electric Characteristics

Note:

MCA: Min. Current Amps. (A) MFA: Max. Fuse Amps. (A) IFM: Indoor Fan Motor kW: Fan Motor Rated Output (kW) FLA: Full Load Amps. (A)

Min.

198 198 198 198 198

Max.

254 254 254 254 254

Note:

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 KW: Rated Motor Output (KW) FLA: Full Load Amps. (A)

22

MCAC-UTSM-12

Unit Number

Model

Noise level under three speeds of fan (dB(A))

1

MDTA-76C(H)RN2

54

2

MDTA-96C(H)RN2

55

3

MDTA-120C(H)RN2

56

10. Sound Levels

Concealed Duct Type

Discharge

Duct

Suction

1.4m

Microphone

23

MCAC-UTSM-12

f

Type

ALARM

Light

Remarks

Room temp. sensor error

- Manual reset

Evaporator temp. sensor error

☆

- - - Manual reset

Condenser temp. sensor error

- -

☆

- Manual reset

Water pump temp. sensor error

☆

- -

☆

Manual reset

The PRO terminal on PCB of indoor unit without connected to grounding wire

☆ ☆ ☆ ☆

Manual reset

EEPROM error

☆ ☆

- - Manual reset

Condensing water level full error

- - -

☆

Manual reset

12. Troubleshooting

rared signal receiver

In

Manual Switch

Operation lamp

Timer lamp

PRE-DEF lamp(cooling and heating type) or fan only lamp(cooling only type)

OPT. Light

-

TME.

Light

☆

Note: OPT. Light: operation light; TME. Light: timer light; DEF. Light: defrosting light; ☆: the light flashing.

Alarm lamp

DEF. Light

-

13.1 Malfunctions of air conditioner

If any of the following malfunctions occur, stop operation of the air conditioner immediately. Turn off the power switch, and contact the local after sales service center of manufacturer:



The RUN lamp flashes quickly (2 flash per second).



After turning off the power switch and then turning it on again, the RUN lamp still flashes quickly.



The receiving function of the remote controller fails, or the start/ shutdown operation is abnormal.



The fuse blows out frequently, or the circuit breaker protection occurs frequently.



Obstacles or water enter the air conditioner.

 Condensing water leaks from indoor unit.  Other malfunctions occur.

24

MCAC-UTSM-12

Symptoms

Causes

Handling methods

The unit does not work

Power supply fails.

Operate after power resumes.

Power switch is not connected.

Connect the power supply properly.

Fuse blows out or circuit breaker snaps off.

Replace the fuse or check whether electric leakage occurs.

The remote controller or the wire controller fails.

Check the remote controller or wire controller.

Air flowing normally but completely can’t cooling

Temperature setting is improper.

Temperature setting is higher than the room temperature in cooling mode. Or temperature setting is lower than the room temperature in heating mode.

3-minute protection of compressor.

Waiting for 3 minutes.

The unit starts or stops frequently

The system is lack of refrigerant. Or there is too much refrigerant in the system.

Fix the leakage places, and charge the proper quantity of refrigerant.

Air or non-condensable gas exists in the refrigerant system.

Vacuum the system and charge refrigerant again.

Compressor fails.

Repair or replace the compressor.

The voltage is too high or too low.

Install a voltage regulator.

The refrigerant pipe is obstructed.

Locate and replace that part.

Poor cooling effect

The heat exchanger of outdoor unit or indoor unit is too dirty.

Clean the heat exchanger. The filter is too dirty.

Clean the filter.

Air inlet or air outlet of the indoor/ outdoor unit is blocked.

Remove obstacles to keep well ventilating.

Doors or windows of the room are open.

Close all the windows and doors.

Directly exposed to sunlight.

Use curtain to obstruct sunlight.

Too many heat sources in the room.

Reduce the heat sources.

The outdoor ambient temperature is too high.

The cooling effect is poor but normal.

The system is lack of refrigerant.

Fix the leakage places, and charge the proper quantity of refrigerant.

Poor heating effect

The outdoor ambient temperature is lower than -7℃.

Use an assistance heating device.

If the air conditioner fails and does not meet the above phenomena, check the system as the following table:

25

Doors or windows of the room are not closed tightly.

Close the doors and windows properly.

The system is lack of refrigerant.

Fix the leakage places, and charge the proper quantity of refrigerant.

Symptoms

Causes

Handling methods

The fan speed

cannot be

changed Check whether the mode marked on the screen is “AUTO”.

When the “AUTO” mode is selected, the unit will change the fan speed automatically.

Check whether the mode marked on the screen is “DEWET”.

When the “DEWET” mode is selected, the unit will change the fan speed automatically. The fan speed can be selected in “COOLING”,”HEATING” and ”SUPPLY AIR” mode.

The “ON/OFF” button of remote controller do not work

Check whether the batteries of remote controller are exhausted.

Replace the batteries. The “ON/OFF”

lamp extinguishes

Check whether the time set on the timer has expired.

Restart the unit.

The “TIMER ON” lamp extinguishes

Check whether the time set on the timer has expired.

It comes to the setting time and the unit stat running automatically.

No receiving sounds from the indoor unit even when the “ON/OFF” button is pressed

Check whether the signal transmitter of the remote controller is properly directed to the infrared signal receiver of the indoor unit when the “ON/OFF” button is pressed.

Directly transmit the signal transmitter of the remote controller to the infrared signal receiver of the indoor unit, and then push the “ON/OFF” button twice.

The buttons of the remote controller do not work

Check whether the settings are locked.

Push the “LOCK” button again.

MCAC-UTSM-12

26

MCAC-UTSM-12

No

Yes

All lamps flashing at 5Hz

Judge 1: The PRO terminal on PCB of indoor unit without connecting to grounding wire

Validate: Check whether the PRO terminal on PCB of indoor unit without connected to grounding wire.

Connect it to grounding wire.

Judge 2: Optical coupler on PCB malfunction

Validate: Check whether the Optical coupler is normal.

Replace optical coupler

Replace indoor PCB.

Operation lamp flashes:

Yes

27

MCAC-UTSM-12

Timer lamp flashing at 5Hz

Room temperature sensor malfunction

Judge 1: Check the room temperature sensor Is break off.

Connects it well.

Judge 2: Check the room temperature sensor is abnormal.

Validate: Check whether the resistance of the temperature sensor is correct according to Annex 1.

Replace temperature sensor

Replace indoor PCB.

No

Yes

No

Operation lamp flashes:

Yes

28

MCAC-UTSM-12

Yes

No

Yes

Replace temperature sensor

Operation lamp flashing at 5Hz

Evaporate temperature sensor is abnormal.

Judge 1: Check evaporate temperature sensor is break off.

Judge 2: Evaporate temperature sensor is abnormal.

Validate: Check whether the resistance of the room temperature sensor is correct according to Annex 1.

Replace temperature sensor

Replace indoor PCB.

Operation lamp flashes:

No

29

Defrosting lamp flashing at 5Hz

Condenser temperature sensor malfunction

Judge 1: Check condenser temperature sensor is break off.

Replace temperature sensor

Yes

Judge 2: Condenser temperature sensor is abnormal.

Validate: Check whether the resistance of the condenser temperature sensor is correct according to Annex 1.

Replace temperature sensor

No

Yes

Replace indoor PCB.

Operation lamp flashes:

MCAC-UTSM-12

No

30

MCAC-UTSM-12

Floor-standing Type

1. Features ............................................................................ 32

2. Specifications .................................................................. 33

3. Dimensions ...................................................................... 34

4. Service Space .................................................................. 35

5. Refrigerant cycle diagrams ............................................. 36

6. Wiring Diagrams .............................................................. 37

7. Capacity Tables ................................................................ 39

8. Electric Characteristics ................................................... 43

9. Sound Levels ................................................................... 44

10. Exploded View .......... Ошибка! Закладка не определена.

11. Troubleshooting ............................................................. 45

12. Accessories ............... Ошибка! Закладка не определена.

31

1. Features

MCAC-UTSM-12

1. The appearance is novel, luxurious, refined.

2. High capacity of cooling/heating, efficient, and energy-saving.

3. Adopt advanced and high efficient scroll compressor, wide angle and long distance air supply.

4. Remote control standard, screen control optional.

5. Easy installation and maintenance.

6. Suit for hotel, meeting room, airport lounge, etc. public occasion use.

32

MCAC-UTSM-12

Model

MDFA-76CRN2

MDFA-76HRN2

MDFA-96CRN2

MDFA-96HRN2

Code

220043900081

220043900071

220043900061

220043900051

Power supply

-

220~240V-1Ph-50Hz

Rated input power

W

11500

14500

14700

Rated current

A

28

28.1

Cooling Capacity

Btu/h

94,500

92,100

W

27700

27000

Input

W

9280

9450

EER

W/W

2.98

2.86

Heating Capacity

Btu/h

——

103700

W

——

30400

Input

W

——

9130

COP

W/W

——

3.33

Indoor air flow

m3/h

4500

Indoor noise level

dB(A)

54

Refrigerant Type

-

Control - Capillary

Capillary

Fan

Type - Centrifugal fan

Centrifugal fan

Fan model

YSK300-6

Dimension

mm

Φ250

Drive type/ Motor step

-

Direct/ Single

Motor model

-

YSK300-6

Motor input* No.

W

590

Motor speed(Hi)

rpm

870

Coil

Type

-

Copper tube and

aluminum fin

Copper tube and

aluminum fin

Copper tube and

aluminum fin

Copper tube and

aluminum fin

Tube size

mm

Ф9.52

No. of rows - 3 3 3

3

Fin per inch

FPI

16

Length* height

mm

982*711

Controller - Remote controller

Remote controller

Drainage water pipe dia.

mm

Ф41

Connection wiring

Power wiring

mm2

3×2.5

Signal wiring

mm2

2×1.0

4×1.0

2×1.0

4×1.0

Indoor unit Dimension

(WxHxD)

mm

1200*1860*420

Packing (W*H*D)

mm

1362*2023*582

Net/Gross weight

kg

158/174

2. Specifications

18.5 18.5

75,100 75,100

22000 22000

7450 7450

2.95 2.95

—— 83600 —— 24500 —— 6500 —— 3.77

4500 4500

53 53

R407C R407C R407C R407C

33

MCAC-UTSM-12

Notes:

1. Nominal cooling capacities are based on the following conditions: Indoor temp: 27°CDB, 19°CWB; Outdoor temp: 35°CDB; Equivalent ref. piping: 7.5m (horizontal)

2. Nominal heating capacities are based on the following conditions: Indoor temp: 20°CDB; Outdoor temp: 7°CDB, 6°CWB; Equivalent ref. piping: 7.5m (horizontal)

3. Dimensions

34

MCAC-UTSM-12

4. Service Space

Front view

m

c

0

1

m

c

0

1

30 cm

No obstacle in front of it

Rear

35

MCAC-UTSM-12

5. Refrigerant cycle diagrams

5.1 Cooling only: MDFA-76CRN2, MDFA-96CRN2

Cooling

Outdoor heat-exchanger

HP Switch

Discharge temp. sensor

Compressors

LP Switch

Liquid-gas seperator

5.2 Cooling and heating: MDFA-76HRN2, MDFA-96HRN2

Cooling

Stop valve

T3

Stop valve

Indoor unit

Capillary

Indoor heat-exchanger

T2

T4

36

Heating

HP Switch

Discharge temp. sensor

Compressors

LP Switch

4-way valve

Outdoor heat-exchanger

Liquid-gas seperator

T3

Check valve

Stop valve

Capillary

Indoor unit

Indoor

heat-exchanger

Stop valve

T2

T4

MCAC-UTSM-12

6. Wiring Diagrams

6.1 MDFA-76CRN2, MDFA-96CRN2

CN20CN20CN20

37

MCAC-UTSM-12

6.2 MDFA-76HRN2, MDFA-96HRN2

CN20CN20CN20

38

MCAC-UTSM-12

Gross Cooling Capacity (kW)

Outdoor DB(°C)

29.40

35.00

Indoor

WB(°C)

16.10

19.40

22.80

16.10

19.40

22.80

CFM

DB(°C)

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

2125

23.9

19.6

16.1

6.33

21.7

12.2

6.53

23.0

5.3

6.66

18.8

15.4

6.76

20.5

11.6

6.99

21.8

5.0

7.13

26.7

20.3

18.4

6.35

22.1

14.3

6.55

23.5

10.1

6.68

19.2

17.4

6.78

20.9

13.5

7.01

22.2

9.6

7.15

29.4

21.0

20.2

6.37

6.7

19.6

18.8

6.8

21.3

17.5

7.03

22.6

13.5

32.2

21.7

21.3

6.38

6.71

20.0

19.6

6.81

21.7

19.8

7.05

23.1

17.0

2310

23.9

20.2

17.0

6.53

6.86

19.4

16.3

6.96

21.1

12.2

7.19

22.4

5.3

26.7

20.9

19.4

6.55

6.88

19.8

18.3

6.98

21.5

15.3

7.21

22.8

10.0

29.4

21.6

21.2

6.57

6.9

20.2

19.8

7

21.9

18.4

7.23

23.3

14.2

32.2

22.4

6.58

6.91

20.6

7.01

22.4

20.7

7.25

23.7

17.7

2650

23.9

20.7

19.0

6.77

22.8

14.2

7.1

24.1

6.3

7.1

19.9

18.3

7.2

21.6

13.5

7.43

22.8

5.9

7.57

26.7

21.4

6.79

23.2

17.9

6.99

24.6

11.8

7.12

20.3

7.22

22.0

16.9

7.45

23.3

11.2

7.59

29.4

22.2

6.81

23.7

21.7

7.01

25.1

16.6

7.14

20.7

7.24

22.4

20.6

7.47

23.8

15.7

7.61

32.2

22.9

6.82

24.1

21.9

7.02

25.6

20.8

7.16

21.1

7.26

22.9

20.8

7.49

24.2

19.7

7.63

7. Capacity Tables

7.1 76kBtu/h

22.5 18.5 6.57 24.0 14.3

23.0 20.9 6.58 24.4 18.0

22.3 12.9 6.73 23.6 5.6

22.7 16.1 6.75 24.1 10.6

23.2 19.5 6.77 24.6 15.0

23.6 21.9 6.78 25.1 18.7

7.17

7.19

7.33

7.35

7.37

7.39

39

MCAC-UTSM-12

Gross Cooling Capacity (kW)

Outdoor DB(°C)

40.60

46.10

51.70

Indoor

WB(°C)

16.10

19.40

22.80

16.10

19.40

22.80

16.10

19.40

22.80

CFM

DB(°C)

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

2125

23.9

18.3

15.0

7.59

19.9

11.2

7.83

21.2

4.9

7.98

16.8

13.8

7.78

18.3

10.4

8.04

19.5

4.5

8.29

16.1

13.2

9.68

17.3

9.8

10.03

18.4

4.3

10.28

26.7

18.7

17.0

7.61

20.3

13.1

7.85

21.6

9.3 8 17.2

15.6

7.8

18.7

12.1

8.06

19.9

8.6

8.31

16.4

14.9

9.7

17.7

11.5

10.06

18.8

8.1

10.31

29.4

19.1

18.3

7.63

20.7

17.0

7.87

22.0

13.1

8.02

17.5

16.9

7.82

19.1

15.6

8.08

20.3

12.1

8.33

16.7

16.1

9.72

18.0

14.8

10.09

19.2

11.4

10.34

32.2

19.4

19.1

7.65

21.1

19.2

19.4

17.7

8.1

20.7

15.2

8.35

17.0

16.7

9.75

18.4

16.7

10.11

19.5

2310

23.9

18.9

15.9

7.79

20.5

11.8

18.9

10.9

8.24

20.1

4.7

8.49

16.7

14.0

9.88

17.9

10.4

10.23

19.0

26.7

19.3

17.9

7.81

20.9

14.8

19.3

13.7

8.26

20.5

9.0

8.51

17.0

15.7

9.9

18.3

13.0

10.26

19.4

29.4

19.7

19.3

7.83

21.3

17.9

19.7

16.5

8.28

20.9

12.8

8.53

17.3

17.0

9.92

18.7

15.7

10.29

19.8

32.2

20.1

7.85

21.7

20.1

18.6

8.3

21.3

15.9

8.55

17.7

9.95

19.0

17.6

10.31

20.2

2650

23.9

19.4

17.8

7.49

21.0

13.1

19.4

12.1

8.48

20.6

5.3

8.73

17.2

15.7

10.11

18.4

11.5

10.47

19.5

26.7

19.8

7.51

21.4

16.5

19.8

15.2

8.5

21.0

10.1

8.75

17.5

10.14

18.8

14.5

10.5

19.9

29.4

20.2

7.53

21.8

20.0

7.77

23.2

15.3

7.92

18.7

8.26

20.2

18.5

8.52

21.4

14.2

8.77

17.9

10.17

19.2

17.6

10.53

20.3

13.4

10.78

32.2

20.6

7.55

22.3

20.2

7.79

23.6

19.2

7.94

19.0

8.28

20.6

18.7

8.54

21.9

17.8

8.79

18.2

10.19

19.6

17.8

10.55

20.7

16.8

10.8

7.89 22.5 16.5 8.04 17.9 17.5 7.84

8.03 21.8 5.1 8.18 17.5 14.7 7.98

8.05 22.2 9.7 8.2 17.8 16.5 8

8.07 22.6 13.8 8.22 18.2 17.8 8.02

8.09 23.1 17.2 8.24 18.5 18.5 8.04

7.88 22.3 5.8 7.88 17.9 16.5 8.22

7.75 22.7 10.9 7.9 18.3 18.3 8.24

Notes:

1. DB = Dry Bulb Temperature (°C), WB = Wet Bulb Temperature (°C)

4. TGC = Total Cooling Capacity (kW)

5. SHC = Sensible Heating Capacity (kW)

6. PI = Power Input (kW)

14.4 10.36

4.5 10.48

8.5 10.51

12.1 10.54

15.1 10.56

5.1 10.72

9.5 10.75

40

MCAC-UTSM-12

Gross Cooling Capacity (kW)

Outdoor DB(°C)

29.40

35.00

Indoor

WB(°C)

16.10

19.40

22.80

16.10

19.40

22.80

CFM

DB(°C)

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

2125

23.9

25.1

20.6

8.23

27.2

15.4

8.43

28.6

6.6

8.56

24.4

20.0

8.66

26.1

14.7

8.89

27.3

6.3

9.03

26.7

26.0

23.6

8.25

8.58

24.9

22.6

8.68

26.6

17.2

8.91

27.9

12.0

29.4

26.9

25.9

8.27

8.6

25.4

24.4

8.7

27.1

22.2

8.93

28.4

16.9

32.2

27.8

27.3

8.29

8.62

25.9

25.4

8.72

27.7

25.1

8.95

29.0

21.3

2310

23.9

25.7

21.6

8.43

8.76

25.0

21.0

8.86

26.7

15.4

9.09

27.9

6.6

26.7

26.6

24.6

8.45

8.78

25.5

23.6

8.88

27.2

19.3

9.11

28.5

12.5

29.4

27.5

27.0

8.47

8.8

26.0

25.5

8.9

27.7

23.3

9.13

29.1

17.7

32.2

28.5

8.49

8.82

26.5

8.92

28.3

26.2

9.16

29.7

22.1

2650

23.9

26.2

24.0

8.67

28.3

17.7

9

29.7

7.7 9 25.5

23.4

9.1

27.2

17.0

9.33

28.4

7.4

9.47

26.7

27.1

8.69

28.9

22.2

8.89

30.3

14.5

9.02

26.0

9.12

27.7

21.3

9.35

29.0

13.9

9.49

29.4

28.1

8.71

29.5

27.0

8.91

30.9

20.5

9.04

26.5

9.14

28.3

25.9

9.37

29.6

19.6

9.51

32.2

29.0

8.73

30.1

27.3

8.93

31.5

25.6

9.07

27.1

9.17

28.8

26.2

9.4

30.2

24.5

9.54

7.2 96kBtu/h

27.8 18.0 8.45 29.2 12.6

28.3 23.2 8.47 29.8 17.7

28.9 26.3 8.49 30.4 22.3

27.8 16.1 8.63 29.2 6.9

28.4 20.1 8.65 29.8 13.1

29.0 24.3 8.67 30.4 18.5

29.6 27.4 8.69 31.0 23.1

9.05

9.07

9.1

9.23

9.25

9.27

9.3

41

MCAC-UTSM-12

Gross Cooling Capacity (kW)

Outdoor DB(°C)

40.60

46.10

51.70

Indoor

WB(°C)

16.10

19.40

22.80

16.10

19.40

22.80

16.10

19.40

22.80

CFM

DB(°C)

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

TGC

SHC

PI

2125

23.9

24.0

19.7

9.49

25.6

14.5

9.73

26.8

6.2

9.88

22.5

18.5

9.68

24.0

13.6

9.94

25.2

5.8

10.18

20.2

16.5

11.67

21.5

12.1

12.03

22.5

5.2

12.28

26.7

24.5

22.3

9.51

26.1

16.9

9.75

27.4

11.8

9.9

23.0

20.9

9.7

24.5

15.9

9.96

25.7

11.1

10.21

20.6

18.7

11.7

21.9

14.2

12.06

23.0

9.9

12.31

29.4

25.0

24.0

9.53

26.6

21.8

9.77

27.9

16.6

9.92

23.4

22.5

9.72

25.0

20.5

9.98

26.2

15.6

10.24

21.0

20.2

11.73

22.3

18.3

12.09

23.4

14.0

12.34

32.2

25.5

25.0

9.56

27.1

24.7

9.8

28.5

21.0

9.95

23.9

23.4

9.75

25.5

23.2

10.01

26.7

19.7

10.26

21.4

21.0

11.76

22.8

20.7

12.12

23.9

17.6

12.37

2310

23.9

24.6

20.7

9.69

26.2

15.1

9.93

24.6

14.2

10.13

25.8

6.1

10.38

20.8

17.5

11.87

22.1

12.8

12.23

23.1

26.7

25.1

23.2

9.71

26.7

18.9

9.95

25.1

17.8

10.16

26.3

11.5

10.41

21.2

19.6

11.9

22.5

16.0

12.26

23.6

29.4

25.6

25.1

9.73

27.2

22.9

9.97

25.6

21.5

10.19

26.8

16.4

10.44

21.6

21.2

11.93

23.0

19.3

12.29

24.1

32.2

26.1

9.76

27.8

25.7

10

26.1

24.2

10.21

27.4

20.4

10.46

22.1

11.96

23.4

21.7

12.32

24.6

2650

23.9

25.1

23.0

9.93

26.7

16.7

10.31

25.1

15.7

10.37

26.3

6.8

10.62

21.3

19.5

12.11

22.6

14.1

12.47

23.6

26.7

25.6

9.95

27.2

20.9

10.19

25.6

19.7

10.4

26.8

12.8

10.65

21.7

12.14

23.0

17.7

12.5

24.1

29.4

26.1

9.97

27.7

25.5

10.22

29.1

19.3

10.37

24.6

10.17

26.1

24.0

10.43

27.3

18.1

10.68

22.1

12.17

23.5

21.5

12.53

24.6

16.3

12.78

32.2

26.6

10

28.3

25.7

10.24

29.7

24.1

10.39

25.1

10.19

26.6

24.2

10.45

27.9

22.7

10.7

22.6

12.2

23.9

21.8

12.56

25.1

20.4

12.81

27.5 6.5 10.07 23.1 19.4 9.88

28.0 12.3 10.1 23.6 21.9 9.9

28.6 17.4 10.13 24.1 23.6 9.92

29.1 21.7 10.15 24.6 24.6 9.95

27.9 7.2 10.31 23.6 21.7 10.11

28.5 13.6 10.34 24.1 24.1 10.14

Notes:

1. DB = Dry Bulb Temperature (°C), WB = Wet Bulb Temperature (°C)

4. TGC = Total Cooling Capacity (kW)

5. SHC = Sensible Heating Capacity (kW)

6. PI = Power Input (kW)

5.5 12.48

10.4 12.51

14.7 12.54

18.3 12.57

6.1 12.72

11.5 12.75

42

MCAC-UTSM-12

Model

Indoor Unit

Power Supply

IFM

Hz

Voltage

Min.

Max.

MCA

MFA

KW

FLA

MDFA-76CRN2

50

220-240

198

254

3.25

8

0.59

2.773

MDFA-76HRN2

50

220-240

198

254

3.25

8

0.59

2.773

MDFA-96CRN2

50

220-240

198

254

3.25

12

0.59

2.773

MDFA-96HRN2

50

220-240

198

254

3.25

12

0.59

2.773

Model

Outdoor Unit

Compressor

OFM

Hz

Voltage

TOCA

MFA

MSC

RLA

KW

FLA

MDOV-76C-CN2

50

380-415

18.5

21.85

48*2

6.3*2

0.573

2.613

MDOV-76H-CN2

50

380-415

18.5

21.85

48*2

6.3*2

0.573

2.613

MDOV-96C-CN2

50

380-415

28

30

53*2

8.0*2

0.573

2.613

MDOV-96H-CN2

50

380-415

28

30

53*2

8.0*2

0.573

2.613

8. Electric Characteristics

Note : MCA: Min. Current Amps. (A) MFA: Max. Fuse Amps. (A) KW: Fan Motor Rated Output (KW) FLA: Full Load Amps. (A) IFM: Indoor Fan Motor

Power Supply

Min. Max. MCA

342 438 15.75 342 438 15.75 342 438 20 342 438 20

Note:

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 KW: Rated Motor Output (KW) FLA: Full Load Amps. (A)

43

9. Sound Levels

1m

Microphone

1m

Unit Number

Model

Noise level under three speeds of fan (dB(A))

1 MFA-76C(H)R

53

2 MFA-96(H)R

54

Type

Code

Remarks

EEPROM error

E0

Manual reset

Room temp. sensor error

E1

Manual reset

Evaporator temp. sensor error

E2

Manual reset

Evaporator temp. too low protection in cooling mode

P1

Auto reset

Evaporator temp. too high protection in heating mode

P2

Auto reset

MCAC-UTSM-12

11. Troubleshooting

44

MCAC-UTSM-12

LED indicate E1

Fault of indoor temperature sensor T1

Judge 1: Whether the indoor temperature sensor T1 is break off.

Connects it well.

No

Judge 2: Whether the indoor temperature sensor T1 is malfunction.

Validate: Check whether the resistance of the temperature sensor is correct according to Annex 1.

Replace it.

No

Yes

Judge 3: PCB is malfunction

Replace indoor PCB

11.1 E1 malfunction

Yes

46

MCAC-UTSM-12

Replace it.

LED indicate E2

Fault of indoor temperature sensor T2

Judge 1: Whether the indoor temperature sensor T2 is break off.

Connects it well.

No

Judge 2: Whether the indoor temperature sensor T2 is malfunction.

Validate: Check whether the resistance of the temperature sensor is correct according to Annex 1.

No

Yes

Judge 3: PCB is malfunction

Replace indoor PCB

11.2 E2 malfunction

Yes

47

LED indicate P1

Under heating mode, T2 is on high temperature protection

Judge 1: Check whether the evaporator temperature sensor T2 is break off.

Connect it well. Yes

Judge 2: Whether the evaporator temperature sensor is malfunction.

Validate: Check whether the resistance of the temperature sensor is correct according to Annex 1.

Replace the temperature sensor

No

Yes

Judge 3: Check whether the outdoor ambient temperature is too high (more than 24℃)

Stop the unit.

Yes

No

Replace indoor PCB

11.3 P1 malfunction

MCAC-UTSM-12

No

48

MCAC-UTSM-12

LED indicate P2

Under cooling mode, T2 is on low temperature protection

Judge 1: Check whether the evaporator temperature sensor T2 is break off.

Connects it well.

Yes

Judge 2: Whether the evaporator temperature sensor is malfunction.

Validate: Check whether the resistance of the temperature sensor is correct according to Annex 1.

Replace the temperature sensor

No

Yes

Judge 3: Check whether the outdoor ambient temperature is too low (less than 17℃)

Stop the unit.

Yes

No

Replace indoor PCB

11.4 P2 malfunction

No

49

MCAC-UTSM-12

Part 3 Outdoor Units

1. Specifications ................................................................... 51

2. Dimension ......................................................................... 53

3. Service Space ................................................................... 55

4. Wiring Diagrams ............................................................... 56

5. Electric Characteristics ................................................... 59

6. Operation Limits ............................................................... 60

7. Sound Levels .................................................................... 60

8. Exploded View ......... Ошибка! Закладка не определена.

9. Troubleshooting ............................................................... 61

50

MCAC-UTSM-12

Model

MDOV-76C-CN2

MDOV-76H-CN2

MDOV-96C-CN2

Code

220075900100

220075900090

220075900060

Power supply - 380~415V-3N-50Hz

380~415V-3N-50Hz

Ambient temp range

℃

21~52

-10～52

21~52

Rated input W 11500

11500

14500

Rated current A 20

20

28

Noise level

dB(A)

63

64

Compressor

Type - Scroll

Scroll

Brand - HITACHI

HITACHI

Model - 403DH-64D2Y

403DH-64D2Y

503DH-83D2Y

Qty.

-

2 2 2

Capacity

Btu/h

40356

52800

Input W 3600

3600

4550

Rated current (RLA)

6.3

8

Locked rotor Amp (LRA)

48

53

Refrigerant Type

Charge

6200

6500

Outdoor fan motor

Type

Axial fan

Dimension

Φ530

Drive type/ motor step

Direct/ Single

Motor model

YDK210-6A

Motor input

293+280

Motor speed(Hi)

917/930

Outdoor coil

Type

-

Copper tube and

aluminum fin

Copper tube and

aluminum fin

Copper tube and

aluminum fin

Tube size

mm

Φ7.94

No. of rows - 2 2 2

Fin per inch

FPI

18

Length * height

mm

2171*880

Refrigerant piping Liquid side/ Gas side

mm

Ф12.7/Ф22

Ф12.7/Ф25

Max. pipe length

m

50

Max. difference in level

m

30

Connection wiring

Power wiring

mm2

5*6.0

Signal wiring

mm2

2*1.0

4*1.0

2*1.0

Outdoor unit Dimension (W*H*D)

mm

1260*908*700

Packing (W*H*D)

mm

1320*1060*730

Net/ Gross weight

kg

161/194

164/179

177/192

1. Specifications

A 6.3 A 48

-

g 6200

-

mm Φ530

- Direct/ Single

- YDK210-6A

W

rpm 917/930

R407C R407C R407C

Axial fan

293+280

Notes:

1. Nominal cooling capacities are based on the following conditions:

Indoor temp: 27°CDB, 19°CWB; Outdoor temp: 35°CDB; Equivalent refrigerant piping: 7.5m (horizontal)

2. Nominal heating capacities are based on the following conditions:

Indoor temp: 20°CDB; Outdoor temp: 7°CDB, 6°CWB; Equivalent ref. piping: 7.5m (horizontal)

51

MCAC-UTSM-12

Model

MDOV-120C-CN2

MDOV-120H-CN2

Code

220075900050

220075900080

220075900070

Power supply -

380~415V-3N-50Hz

Ambient temp range

℃

-10～52

21~52

-10～52

Rated input W 14700

18000

Rated current

A

28.1

28.7

Noise level

dB(A)

64

65

Compressor

Type - Scroll

Scroll

Brand - HITACHI

HITACHI

Model - 503DH-83D2Y

603DH-95D2Y-X10

Qty.

-

2 2 2

Capacity

Btu/h

52800

60342

Input W 4550

5300

Rated current (RLA)

9.1

Locked rotor Amp (LRA)

57

Refrigerant Type

Charge

10000

9500

Outdoor fan motor

Type

Axial fan

Dimension

Φ530

Drive type/ motor step

Direct/ Single

Motor model

YDK400-4C

Motor input

400*2

Motor speed(Hi)

1180/790

Outdoor coil

Type

-

Copper tube and

aluminum fin

Copper tube and

aluminum fin

Copper tube and

aluminum fin

Tube size

mm

Φ7.94

No. of rows - 2 2 2

Fin per inch

FPI

18

Length * height

mm

2171*880

1376*880*2

Refrigerant piping

Liquid side/ Gas side

mm

Ф12.7/Ф25

Ф16/Ф28.6

Max. pipe length

m

50

Max. difference in level

m

30

Connection wiring

Power wiring

mm2

5*6.0

Signal wiring

mm2

4*1.0

2*1.0

4*1.0

Outdoor unit Dimension (W*H*D)

mm

1260*908*700

Packing (W*H*D)

mm

1320*1060*730

Net/ Gross weight

kg

180/195

193/208

196/211

MDOV-96H-CN2

A 8 A 53

-

g 6500

-

mm Φ530

- Direct/ Single

- YDK210-6A

W

rpm

R407C R407C R407C

Axial fan

293+280

917/930

Notes:

1. Nominal cooling capacities are based on the following conditions:

Indoor temp: 27°CDB, 19°CWB; Outdoor temp: 35°CDB; Equivalent refrigerant piping: 7.5m (horizontal)

2. Nominal heating capacities are based on the following conditions:

Indoor temp: 20°CDB; Outdoor temp: 7°CDB, 6°CWB; Equivalent ref. piping: 7.5m (horizontal)

52

MCAC-UTSM-12

2. Dimension

2.1 MDOV-76C(H)-CN2, MDOV-96C(H)-CN2

53

MCAC-UTSM-12

2.2 MDOV-120C(H)-CN2

54

MCAC-UTSM-12

t

3. Service Space

3.1 MDOV-76C(H)-CN2, MDOV-96C(H)-CN2, MDOV-120C(H)-CN2,

Air outlet

Air inlet

≥1000 mm

≥500 mm

Air inle

≥1000 mm

Note:

1. In case any obstacles exist above the outdoor unit, such obstacles must be 2000mm above the outdoor unit.

2. If miscellaneous articles are piled around the outdoor unit, such articles must be 400mm below the top of the outdoor unit.

55

MCAC-UTSM-12

t

Foundation of the outdoor unit

676

762

≥500 mm

M12 foundation bol 4 screws for 1 unit

56

MCAC-UTSM-12

4. Wiring Diagrams

4.1 MDOV-76C-CN2, MDOV-96C-CN2, MDOV-120C-CN2

57

MCAC-UTSM-12

4.2 MDOV-76H-CN2, MDOV-96H-CN2, MDOV-120H-CN2

58

MCAC-UTSM-12

Model

Outdoor Unit

Power Supply

Compressor

OFM

Hz

Voltage

Min.

Max.

MCA

TOCA

MFA

MSC

RLA

KW

FLA

MDOV-76C-CN2

50

380-415

342

438

15.75

18.5

21.85

48*2

6.3*2

0.573

2.613

MDOV-76H-CN2

50

380-415

342

438

15.75

18.5

21.85

48*2

6.3*2

0.573

2.613

MDOV-96C-CN2

50

380-415

342

438

20

28

30

53*2

8.0*2

0.573

2.613

MDOV-96H-CN2

50

380-415

342

438

20

28

30

53*2

8.0*2

0.573

2.613

MDOV-120C-CN2

50

380-415

342

438

22.75

28.7

32.55

57*2

9.1*2

1.2

5.857

MDOV-120H-CN2

50

380-415

342

438

22.75

28.7

32.55

57*2

9.1*2

1.2

5.857

5. Electric Characteristics

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)

59

6. Operation Limits

Unit Number

Model

Noise level (dB(A))

1

-76C(H) -CN2

63

2

-96C(H) -CN2

64

3

MDOV

-120C(H) -CN2

65

MDOV

Temperature range for unit operation:

Item

Model

All model 21℃~52℃ 17℃～32℃ -10℃~24℃ 20℃～27℃

Outdoor Indoor Outdoor Indoor

Cooling mode Heating mode

7. Sound Levels

Standard of testing

Outdoor unit

Front

Note: H = (h+1) / 2

60

MCAC-UTSM-12

Type

LED1

LED2

Remarks

Standby

☆

-

Cooling mode

◆

◇

-

Heating mode

◆

-

Defrosting mode

◇

◆

-

Phase sequence protection

◆

●★

Manual reset

Communication failure

◆

●●★

Manual reset

Outdoor condenser temp. sensor error

◆

●●●★

Manual reset

Outdoor ambient temp. sensor error

●●●●★

Manual reset

Protection of low pressure

●★

Auto reset

Protection of high pressure

●●★

Auto reset

Protection of over-current

●●●★

Auto reset

Protection of condenser hi-temp.

●●●●★

Auto reset

9. Troubleshooting

◆ ◇ ◇ ◇ ◇

Note:

☆: Light for 1 second, extinguish for 1 second;

◆: Light; ◇: Extinguish;

●: Light for 0.4 second, extinguish for 0.4 second; ★: Light for 2 second, extinguish for 2 second.

61

Fault of T3A or T3B

Judge 1: Whether the sensor is break off.

Connects it well.

Yes

Judge 2: Whether the sensor is malfunction.

Validate: Short-connect the outdoor ambient temperature sensor, check whether it can run normally

No

Judge 3: PCB is malfunction

Replace PCB

Malfunctions:

About the Fault of T3A or T3B, High pressure protection, low pressure protection Please refer to the following:

Yes

Replace it.

62

MCAC-UTSM-12

High pressure protection

Judge 1: Whether the wiring between the high pressure switch and main control board is connected well or correctly

Judge 2: Whether the high pressure switch is broken

Yes

No

Connect it well

Validate: Short connect the high pressure switch socket, check whether the system can run normally

Yes

Replace high pressure switch

Check whether the refrigerant system is ok

Replace outdoor PCB

No

Judge 3: Check whether the outdoor ambient temperature is too high

Yes

Stop the unit

Judge 4: Check whether the outdoor unit is bad ventilation

Yes

Make the outdoor unit ventilate well

No

Judge 5: Check whether the heat exchanger is dirty

Yes

Clean the heat exchanger

No

Judge 6: Check whether the refrigerant pipe is blocked

Yes

Drop refrigerant, then use the high pressure nitrogen or refrigerant to blow pipe, vacuumize and add the refrigerant again

No

63

Low pressure protection

Judge 1: The wiring between the low pressure switch and main control board is connected well or correctly

Judge 2: Whether the low pressure switch is broken Connect it well

Validate: Short connect the low pressure switch socket, check whether the system can run normally

Check whether the refrigerant system is ok

Yes

No

Judge 3: Check whether the outdoor ambient temperature is too low

Yes

Stop the unit

No

Judge 4: The refrigerant of the system is leakage

Yes

Validate: Connect the pressure gauge to the gauge joint of the system, check whether the pressure is lower than 0.15MPa

Leak hunting: charge nitrogen or refrigerant to the system, if the leakage is serious, there will be

distinct gas leakage “cici” sound;

if the leakage is little, use the suds(mixture of water and abluent is also ok, if it can make bubble) or electronic leak detector.

Judge 5: The refrigerant pipe is blocked

Yes

Drop refrigerant, then use the high pressure nitrogen or refrigerant to blow pipe, vacuumize and add the refrigerant again

No

Replace outdoor PCB

No

Yes

Replace low pressure switch

64

MCAC-UTSM-12

Part 4 Installation

1. Note ................................................................................ 65

2. Installation of Indoor Units ........................................... 66

3. Installation of Outdoor Units ........................................ 71

4. Heat Insulation of the Pipe ............................................ 81

5. Installation of Connective Pipe ..................................... 82

6. Installation of Drain Pipe ............................................... 87

7. Electric Connection ....................................................... 88

8. Methods of configuring and selecting installation ...... 90

1. Note

CAUTION:

 Install the unit where enough space of installation and maintenance is available.  Install the unit where the ceiling is horizontal and enough for bearing the weight of the indoor unit.  Install the unit where the air inlet and outlet are not baffled and are the least affected by external air.  Install the unit where the supply air flow can be sent to all parts in the room.  Install the unit where it is easy to lead out the connective pipe and the drain pipe.  Install the unit where no heat is emitted from a heat source directly.  Installing the equipment in any of the following places may lead to faults of the equipment (if that is

inevitable, consult the supplier):

 The site contains mineral oils such as cutting lubricant.  Seaside where the air contains much salt.  Hot ring area where corrosive gases exist, e.g., sulfide gas.  Factories where the supply voltage fluctuates seriously.  Inside a car or cabin.  Place like kitchen where oil permeates.  Place where strong electromagnetic waves exist.  Place where flammable gases or materials exist.  Place where acid or alkali gases evaporate.  Other special environments.

 Install the unit where enough space of installation and maintenance is available.  Install the unit where the air inlet and air 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 the 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.

65

MCAC-UTSM-12

MTA-120C(H)R MTA-150C(H)R

MTA-76C(H)R MTA-96C(H)R

2. Installation of Indoor Units

2.1 Installation of Duct

2.1.1 Installation Space

Ensure enough space required for installation and maintenance. (Fig-1 and Fig-2)

m m

0 0 5

≥

Electriccontrolbox

Inspectionhole

m

m 0 0 6

≥

Fig-1 Fig -2

2.1.2 Install Φ10 Pendant Bolts Or Ground Bolts (Fig-3)

1. Use f10 or bigger screws. The screw material is high-quality carbon steel (whose surface is zinc plated or

undergoes other rustproof treatment) or stainless steel.

2. The treatment of the ceiling varies between buildings. For detailed measures, consult with the fitting-out staff.

3. Fix the pendant bolts firmly and reliably in light of the specific situation.

4. Installation of the pendant bolt in different environments.

Fig-3

67

A. Wooden structure

Put rectangular sticks across the beams, and set pendant bolts. (Fig-4)

-UTSM-12

Fig-4

B. New concrete roughcast

Use embedded bolts, embedded pulling plugs, and embedded stick harness. (Fig-5)

Fig-5

C. New concrete roughcast

Set it with embedded bushes or embedded bolts. (Fig-6)

Fig-6

D. Steel beam and girder structure

Set and use supportive angle steel. (Fig-7)

Fig-7

2.1.3 Suspending the Indoor Unit

Use a hoisting device to hoist the indoor unit, align it with the installation screw, adjust the horizontality and then tighten it. (Fig-8)

68

MCAC-UTSM-12

Pendant bolt

Unit body

m

0

3

≥

Fig-8

2.1.4 Design and Connection of Duct

 The duct design must comply with the national heating air conditioner pipeline design specifications.  The duct accessories and materials must be produced by professional manufacturers.  In order to prevent air flow shorting, do not keep the air inlet pipe near the air outlet pipe.  Install a filter at an easy-to-maintain place such as intake pipe. (Otherwise, the duct will gather 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.

For its size, see the indoor unit outline diagram. Use M6X20 screws (configured on site) for connection.

 All pipelines must be connected closely and soundly without leak of air. The pipelines must be adiabatic and

free from condensation.

Key points of duct connection (Fig-9)

ir outlet

Muffle

Canvas adapter

Inspection

hole

Fig-9

Air filter

Muffle

Air inlet

69

2.2 Installation of Floor-standing

2.2.1 Installation Space

For ensure the proper installation Select the enough solid and level sites. Ensure enough space required for installation and maintenance. (Fig-10and Fig-11)

-UTSM-12

For anti-fall down, please conduct the follow measures:



See Fig-12 to fix the feet on the floor after select a proper place for installation, since the height of this unit casing is very high.



The right and left sides as well as rear can be fixed, please select the unit fixed measure as per to your actual installing ambient.

Fig-10 Fig-11

70

Fig

-12

MCAC-UTSM-12

Put down the air intake panel, before electric connection:



Uncover the screw-cap in the air intake panel, and then lessen the screws.



Take off the air intake panel; ensure which place secure enough will not make risk to the other people.

NOTE:

Please beware of the foot screw, which may be hurt for the pass-by people, make sure enough security of that, prevent accident occurs.

Fig-13

3. Installation of Outdoor Units

3.1 Important: Construction Checkpoints

1). Installation

Check the model and name to avoid mistaken installation.

2). Refrigerant pipe

 The refrigerant pipes must have the specified diameter.  Nitrogen of a certain pressure must be filled into the refrigerant pipe before welding.  The refrigerant pipe must undergo heat insulation treatment.  After the refrigerant pipe is installed completely, the indoor unit cannot be powered on before performing

the airtight test and creating a vacuum.

3). Pressure test The refrigerant pipe must undergo the airtight test [with 2.94MPa (30kgf/cm2G) nitrogen].

4). Creating a vacuum Be sure to use the vacuum pump to create a vacuum of the connective pipe at both air side and liquid side concurrently.

5). Refrigerant replenishment

 If the pipe is longer than the reference pipe, the refrigerant replenishment quantity for each outdoor unit

should be calculated through the formula obtained according to the actual length of the pipe.

 Record the refrigerant replenishment quantity, actual length of pipe and the height difference of the indoor &

outdoor units onto the operation confirmation table (on the electric control box) of the outdoor unit in advance for future reference.

6). Electric wiring

 Select the power supply capacity and wire size according to the design manual. The power wire size of the

air conditioner should be greater than that of ordinary motors.

71

-UTSM-12

t

 In order to prevent disoperation of the air conditioner, do not interleave or entwine the power cable

(380~415V/3N/50Hz) with the connection wires (low-voltage wires) of the indoor/outdoor unit.

 Power on the indoor unit after performing the airtight test and making a vacuum.

7). Trial run

Perform the trial run only after the outdoor unit has been powered on for over 12 hours.

3.2 Installation Space

 When installing the unit, leave a space for maintenance shown in the following figure. Install the power

supply at the side of the outdoor unit.

 Ensure enough space for installation and maintenance. (Fig-14 and Fig-15)

Air outlet

Air inlet

Air inle

Fig-14

≥1000 mm

Fig-15

NOTE:

1. In case any obstacles exist above the outdoor unit, such obstacles must be 2000mm above the outdoor unit.

2. If miscellaneous articles are piled around the outdoor unit, such articles must be 400mm below the top of the outdoor unit.

≥500 mm

≥1000 mm

72

MCAC-UTSM-12

t

As shown in Fig-16, leave an interval of 500mm between the outdoor units.

The distance of the foundation bolt is shown in Fig-17.

≥500 mm

M12 foundation bol

4 screws for 1 unit

Fig-16

762

676

Fig-17

73

-UTSM-12

3.3 Convey Outdoor Unit

 Use 4 steel ropes of a Ф6mm or bigger size to hoist the outdoor unit and convey it into the room.  In order to prevent scratch and deformity the outdoor unit, apply a guard board to the surface of contact

between the steel ropes and the air conditioner.

 Remove the cushion for use in the transport after finishing the transport. (Fig-18)  Fork truck can be used for conveying.

Steel wire

Guard board

Base and bracket

Holes for fork truck

Fig-18

3.4 Snow protection facilities must be installed in the snowfall areas. (Fig-19)

In case the snow protection facilities are incomplete, faults may occur. In order to prevent influence caused by snow, set up raised pavilion, and install snow protection sheds at the air inlet and air outlet.

74

MCAC-UTSM-12

shed at the a

et

Snow protection

shed at the air inlet

Snow protection

shed at the air outlet

Snow protection

ir inl

Fig-19

3.5 Installation of Refrigerant Pipe

 The refrigerant pipe adapter is located inside the outdoor unit. When the pipe is connected from the front

side, the pipe can be let out through the right front board. (Fig-20 and Fig-21) So remove the left front board first. (Three M5 screws)

 The pipe can be connected from the front left lower side or the bottom notch of the outdoor unit.  When the pipe is connected from the front side, the pipe can be led out through the pipe & wire panel.  In case the pipe is connected from the bottom notch, install it leftward, rightward or backward after leading it

out.

 When the pipe is led from the front, use a cover plate to seal the bottom notch in order to prevent intrusion

of dust or trash.

75

-UTSM-12

Model

Gas side

Liquid side

MDOV

-76C-CN2

Φ22

Φ12.7 -76H-CN2

Φ22

Φ12.7

-96C-CN2

Φ25

Φ12.7

-96H-CN2

Φ25

Φ12.7 -120C-CN2

Φ28.6

Φ16

-120H-CN2

Φ16

MDOV

Fig-20

Fig-21

NOTE:

When welding the refrigerant pipe, in order to prevent internal oxidation of the pipe, nitrogen must be filled in. Otherwise, the oxidized chips may block refrigerating circulatory system.

3.5.1 Size of Outdoor Unit Pipes and Piping Methods

1) Size of outdoor unit pipes and piping methods

76

Φ28.6

MCAC-UTSM-12

H

i

h

t

d

if

f

b

t

i

d

76, 96, 150

kBtu/h

120

kBtu/h

Max. equivalent length of pipe (L)

50m

Max. height difference

Height difference between

indoor unit and outdoor unit (H)

Outdoor upper

30m

Outdoor lower

30m

2) Allowed length of refrigerant pipe and height difference (Fig-22)

Outdoor unit

r

o

m

n

0

3

n

e

H

w

t

i

e

n

u

e

r

c

o

n

o

e

d

r

t

e

u

o d

n

a

g

t

i

e

n

u

Max. pipe length L 50m

Table 1:

Fig-22

77

3) Connection between indoor unit and outdoor unit (Fig-23)

-UTSM-12

76, 96, 120 kBtu/h

78

150 kBtu/h

Fig-23

MCAC-UTSM-12

Diameter of liquid line

Φ12.7

Φ16

3.6 Airtight Test

After the pipes between the indoor unit and the outdoor unit are connected, replenish compressed nitrogen to perform airtight test.

NOTE:

1. The airtight test is performed by using the compressed nitrogen [2.94MPa (30kg/cm2G)].

2. Tighten the spool of the gas valve and liquid valve before compressing the nitrogen.

3. Compress the nitrogen at the air vent of the gas valve.

4. The gas valve and liquid valve are closed in the process of compressing the nitrogen.

5. Do not use oxygen, flammable gas or toxic gas in the airtight test.

3.7 Vacuumize

Use a vacuum pump to make a vacuum. Do not use refrigerant gas to expel air. When making the vacuum, start from the air side.

3.8 Open All Valves

3.9 Additional Charge of Refrigerant

According to the diameter and length of the connective liquid side pipe of the outdoor unit and indoor unit, calculate the refrigerant replenishment quantity. The refrigerant for replenishment is R407C.

Table 2:

Quantity of refrigerant replenished for 1m pipe length

0.115kg

0.190kg

3.10 Remove Trash and Moist in the Pipe

 Trash and foreign matters may come into the pipe in the process of installing the refrigerant pipe. Be sure to

blow them off with nitrogen before connecting the pipe to the outdoor units.

 Use high-pressure nitrogen to clean the pipelines. Do not use the refrigerant of the outdoor unit for cleaning.

3.11 Refrigerant Leak Precautions

This air conditioner uses refrigerant R407C. The R407C is safe refrigerant which is harmless and non-flammable. The room for placing the air conditioner should have a proper space. Even if refrigerant leakage occurs, the density threshold will not be crossed. Additional measures may also be taken.

1) Density threshold: Density of the Freon gas that does not harm the human body. Density threshold of R407C: 0.3 [kg/m3]

 Calculate the total quantity of refrigerant to be replenished (A [kg]). Total refrigerant quantity for 10HP =

refrigerant replenishment quantity upon shipment (11[kg]) + additional refrigerant replenishment corresponding to the pipe length

 Calculate out the indoor volume (B [m3]) (according to the minimum volume)  Calculate out the refrigerant density:

2) Measures against crossing of the refrigerant density threshold

 In order to keep the refrigerant density below the threshold value, please install a mechanic ventilation

device. (Perform ventilation often)

 In case frequent ventilation is impossible, please install the leakage detection alarm device linked with the

mechanical ventilation device.

79

Outdoor unit

-UTSM-12

Room in which re

frigerant is leaked

(All r

efrigerant is leaked)

Fig-24

Fig-25

3.12 Completing the Connection System Name

In case multiple systems are set, in order to identify the connection system of the indoor unit and outdoor unit, it is necessary to give name to each system, and mark it onto the nameplate on the electric control box cover of the outdoor unit.

NOTE:

 The indoor unit and outdoor unit are categorized into system A and system B. When installing and

connecting the indoor unit and outdoor unit, identify the label carefully, and make sure that indoor unit corresponds to the outdoor unit exactly. Otherwise, it may lead to fault of the air conditioner.

 Model of indoor unit. Room name

Example: the first system indoor unit A of the 2nd floor is recorded as: 2F 1A.

80

MCAC-UTSM-12

4. Heat Insulation of the Pipe

4.1 Heat Insulation of the Pipe

In order to prevent faults caused by condensate of the refrigerant pipe and drain pipe, perform condensate prevention and heat insulation properly.

CAUTION:

If it is forecast that high humidity/temperature environment (condensate temperature is over 23℃) 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.

4.2 Heat Insulation of the Drain Pipe

 Be sure to entwine heat insulation materials round the drain pipe which runs through the room.  Carry through heat insulation for the drain pipes thoroughly.

4.3 Heat Insulation of the Refrigerant Pipe

 Please use heat-resistant materials as heat insulation materials 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.

(air-side pipe)

Indoor unit

Fig-26

 After applying the auxiliary heat insulation materials, use vinyl resin tape to seal it lest water leak.

81

-UTSM-12

5. Installation of Connective Pipe

5.1 Preparation before Installation

Check the height difference between the indoor unit and the outdoor unit, and check the length and number of bends of the refrigerant pipeline, which must meet the following requirements:

 Max. Height difference....30m (If the height difference is greater than 5m, it is better to put the outdoor unit

above the indoor unit).

 Max. Pipeline length.........50m.

 Max. Number of bends....15.

 In the process of installing the connective pipe, do not lemmas the air, dust or foreign substance intrudes

into the pipeline system.

 Install the connective pipe only after fixing the indoor and outdoor units.  Keep dry when installing the connective pipe. Do not let moist intrude into the pipeline system.

5.2 Procedure of Connecting Pipes

5.2.1 Measure the required length of the connective pipe, and make the connective pipes in the following procedure.

5.2.1.1 Connect the indoor unit first, and then connect the outdoor unit.

The pipe bend should be handled carefully, without damaging the pipe.

NOTE:

1. Before screwing up the flared nut, apply refrigerant oil at the outer surface of the pipeline flare and the taper surface of the

connection nut. Screw up the nut for 3~4 circles beforehand.

2. When connecting or disconnecting the pipeline, be sure to use two spanners concurrently.

3. Do not rest the weight of the connective pipe on the adapter of the indoor unit. Too heavy load on the adapter of the indoor unit

may deform the pipe and thus affect the cooling/heating effect.

5.2.1.2 The valve of the outdoor unit should be closed completely (as in the factory status). Every time when connecting the pipe, screw off the nut at the valve, and connect the flared pipe (within 5 minutes). If the nut is put away for a long time after being screwed off the valve, dust and other foreign substance may intrude into the pipeline system and lead to fault. Before connecting the pipe, use the refrigerant to expel air out of the pipe.

5.2.1.3 After the refrigerant pipe is connected to the indoor and outdoor units, expel air as instructed in the “Expel air” section. After expelling the air, screw up the nut at the maintenance orifice.

5.2.1.4. Precautions for the flexible part of the pipeline The bend angle shall not exceed 90°.

The bend shall be preferably in the middle of the pipe length, and higher bend radiuses are preferred. Do not bend the flexible pipe for over 3 times.

5.2.1.5 Bend the thin-wall connective pipe When bending the pipe, cut out a notch of the desired size at the bend of the adiabatic pipe, and then expose

the pipe (wrap the pipe with the wrapping tape after bending it). The radio of the elbow pipe should be as large as possible to prevent flattening or crush. Use the pipe bender to make close elbow pipe.

5.2.1.6 Use purchased copper pipe When the cooper pipe is purchased from the market, be sure to use the heat insulation materials of the same

type (with a thickness of over 9mm).

82

MCAC-UTSM-12

Fig-27

5.2.2 Deploy the pipelines

 Drill a porthole on the wall, and put the hole sheath and hole cover through the wall.  Place the connective pipe together with the indoor & outdoor connection wires. Use wrapping tape to tie

them tight. Do not let air penetrate into it lest condensation and drips of moist.

 Pull the connective wrapped connective pipe from outdoor through the sheath which gets through the wall,

and lead it into the room. Lay out the pipelines carefully lest damage to the pipes.

5.2.3. Make a vacuum of connective pipeline.

5.2.4. After the above steps are completed, the spool of the valve of the outdoor unit should be completely open, and the refrigerant pipeline of the indoor unit and the outdoor unit should be smooth.

5.2.5. Use leak detector or soap water detect leak carefully to prevent leakage.

5.2.6. Put on an adiabatic envelope (accessory) at connective pipe adapter of the indoor unit, and wrap it tight with the wrapping tape lest condensate and leakage.

 Flare a. Use a pipe cutter to cut off the pipe.

Fig-28

b. Pull the pipe into the rear flare of the connective nut.

83

-UTSM-12

Pipe diameter

Torque

φ6.35

1420~1720N.cm (144~176kgf.cm)

φ9.53

3270~3990N.cm (333~407kgf.cm)

φ12.7

4950~6030N.cm (504~616kgf.cm)

φ16.0

6180~7540N.cm (630~770kgf.cm)

φ19.0

9720~11860N.cm

(990~1210kgf.cm)

Fig-29  Tighten the nut Align with the connective pipe Screw up the connection pipe nut manually, and use a spanner to tighten it as shown in Fig-30

Fig-30

NOTE:

According to the installation conditions, too large torque will damage the flaring, and too small torque will lead to looseness and leakage. Determine the tightening torque by reference to the following table.

 Replenishment quantity of refrigerant required for air conditioner The single-pass pipe is shorter than 5 m, and no additional length is required (note: The unit has been replenished before being shipped). If the single-pass pipe length is 5 m or more, the quantity of fluorine required to be replenished is 0.060X (L-5). (Unit: kg) Record the replenishment quantity of the refrigerant and keep the record properly for reference in future maintenance.

Table 3:

84

MCAC-UTSM-12

Length of connective pipe

(single pass)

Procedure of expelling air

Less than 5m

Use refrigerant in the outdoor unit

5～15m

Use vacuum pump or refrigerant tank.

Intd

it

5.3 Expelling Air

5.3.1. From the following table, select a method of expelling air. Table 4:

If the air conditioner is relocated, be sure to use a vacuum pump or refrigerant tank to expel air.

5.3.1.2. Use the refrigerant in the outdoor unit to expel air (see Fig-31 and Fig-32)

Outdoor unit

Air side

A

oor un

C

D

B

Liquid side

Stop valve

Fig-31

 Screw up the pipe nuts at A, B, C and D completely.  Loosen and remove the square-head cover of valves A and B, rotate the square-head spool of valve B

counterclockwise for 45 degrees and stay for about 10 seconds, and then close the spool of valve B tightly.

 Detect leak for all adapters at A, B, C and D. After making sure that no leak exists, open the maintenance

orifice nut of valve A. After all air is expelled, tighten the maintenance orifice nut of valve A.

 Open the spools of valves A and B completely.  Tighten the square-head cover of valves A and B completely.

5.3.1.3. Use refrigerant tank to expel air (see Fig-31)

 Screw up the pipe nuts at A, B, C and D completely.  Loosen and remove the square-head cover and the maintenance orifice nut of valves A and B.  Connect the filler hose of the refrigerant tank with the maintenance orifice of valve A.  Loosen the valve of the refrigerant tank, continue filling refrigerant for 6 seconds to expel the air, and tighten

the nut of valve B quickly.

 Loosen the valve of the refrigerant tank again, and fill the refrigerant for 6 seconds. Detect leak for all

adapters at A, B, C and D. After making sure that no leak exists, screw off the filler hose. After all the filled refrigerant is expelled, screw up the maintenance orifice nut of valve A quickly.

 Open the square-head spools of valves A and B completely.  Tighten the square-head cover of valves A and B.

5.3.1.4. Use a vacuum pump to expel the air (Fig-32) (For method of using the manifold valve, see the operation manual of manifold valve):

pipe adapter

85

Manifold valve

Multimeter manometer

-76cmHg

-UTSM-12

Lo-handle

Filler hose

Lo pressure valve

Hi-handle

Filler hose

Vacuum pump

Fig-32  Loosen and remove the maintenance orifice nut of valve A, and connect the filler hose of the manifold valve

to the maintenance orifice of valve A (tighten both valve A and valve B).

 Connect the filler hose adapter to the vacuum pump.  Open the low pressure (Lo) handle of the manifold valve completely.  Start the vacuum pump to extract air. At the beginning of extracting air, slightly loosen the maintenance

orifice nut of valve

 B, check whether any air enters it (the vacuum pump noise changes and the multi-meter indicate from

negative to 0). Then tighten this maintenance orifice nut.

 Upon completion of vacuuming, tighten the low pressure (Lo) handle of the manifold valve completely and

stop the vacuum pump. Keep extracting air for over 15 minutes. Check whether the multi-meter points at

-1.0X10 Pa (-76cmHg).

 Loosen and remove the square-head cover of valves A and B. After opening valves A and B completely,

tighten the square head cover of valves A and B.

 Remove the filler hose off the maintenance orifice of valve A, and then tighten the nut.

5.3.1.5. Procedure of using stop valve

 Open the spool until it touches the stop block. Do not attempt to open further.  Use a spanner or a similar tool to tighten the bonnet. The bonnet tightening torque is shown in Table 3

“Tightening torque”.

 Upon completion of installation, open all valves before trial run. Each unit has two valves of different sizes

located at the outdoor unit side. Of the two valves, one is gas valve and the other is liquid valve. The procedure of opening/closing the valve is shown in the right figure (Fig-33).

 Procedure of opening the valve: Open the square-head cover, use a spanner to capture the square head

and open it thoroughly. Then tighten the square-head cover.

 Procedure of closing the valve: Same as the procedure of opening the valve, but rotate the spanner

clockwise thoroughly.

86

MCAC-UTSM-12

Fig-33

5.4 Leak Detection

Use soap water or a leak detector to check whether gas leakage exists at the adapters.

5.5 Heat Insulation

 Use heat insulation materials to wrap the part protruding outside the flared pipe joint and the refrigerant pipe

of the liquid pipe and the gas pipe, and ensure that no gap exists between them.

 Imperfect heat insulation may lead to condensate drips.

6. Installation of Drain Pipe

6.1 Install the drain pipe of the indoor unit

 In order to prevent drain overflow, install a drainage controller at place 1 of the drain pipe. (The drainage

controller is designed to smoothen the drainage when the static pressure outside the unit is high, especially at the air inlet, in addition to remove stink through the drain pipe.)

 The drain of water is natural. In the construction, the external pipe of the outdoor unit slants downward at a

gradient of 1/50~1/100.

 The number of bends and folds of the drain pipe should not exceed 2. Try to avoid bends in order to prevent

trash accumulation.

 In the construction, do not drop trash into the drip tray or drain pipe of the indoor unit.  Upon completion of installing the drain pipe, remove the inspection panel. Put water into the drip tray to

check whether the water can be drained levelly and steadily.

Checking panel

Drain pipe

Checking panel

over 100mm

Bush

(Checking orifice)

Main drain pipe

Fig-34

NOTE:

Drain pipe trash gains easily at the drainage controller. Be sure to install a stopper and a structure that cleans up trash easily.

Bush

over 50mm

6.2. Trial draining of the drain pipe

Open the side panels of the indoor unit, fill water inward, and check whether the water can be drained smoothly. Check water leak at the joint.

6.3. Heat insulation of drain pipe

After making sure that the water drains smoothly and no water is leaked, use adiabatic wool bushes to preserve heat of the drain pipe. Otherwise, condensate will occur.

87

-UTSM-12

7. Electric Connection

7.1 Electric field wiring CAUTION:

 Use special power supply for the air conditioner. Design power supplies specific to the indoor unit and

outdoor unit. The supply voltage must comply with the nominal voltage.

 The external supply circuit of the air conditioner must have a ground wire, and the power supply ground

wire of the indoor unit must be connected with the external ground wire firmly.

 The wiring must be performed by professional technicians according to the circuit diagram labels.  Distribute the wires according to the relevant electric technical standards promulgated by the State, and set

the Residual Current-operated Circuit Breaker (RCCB) properly.

 The power wire and the signal wire shall be laid out neatly and properly, without mutual interference or

contacting the connection pipe or valve.

 No power cable is attached to this equipment. The user can select the power cable by reference to the

stipulated power supply specifications. No joint of wires is allowed.

 Upon completion of wire connection, double check it and then connect the power supply.

Duct type- cooling only: 76 kBtu/h; 96 kBtu/h; 120 kBtu/h,

88

MCAC-UTSM-12

Duct type- cooling and heating type: 76 kBtu/h; 96 kBtu/h; 120 kBtu/h,

Floor standing type- cooling only: 76 kBtu/h; 96 kBtu/h,

89

Floor standing type- cooling and heating type:76 kBtu/h; 96 kBtu/h,

-UTSM-12

90

R22 50Hz Tropical Split AC MCAC-UTSM-12

℃

K Ohm

℃

K Ohm

℃

K Ohm

-20

115.266

20

12.6431

60

2.35774

100

0.62973

-19

108.146

21

12.0561

61

2.27249

101

0.61148

-18

101.517

22

11.5000

62

2.19073

102

0.59386

-17

96.3423

23

10.9731

63

2.11241

103

0.57683

-16

89.5865

24

10.4736

64

2.03732

104

0.56038

-15

84.2190

25

10.000

65

1.96532

105

0.54448

-14

79.3110

26

9.55074

66

1.89627

106

0.52912

-13

74.5360

27

9.12445

67

1.83003

107

0.51426

-12

70.1698

28

8.71983

68

1.76647

108

0.49989

-11

66.0898

29

8.33566

69

1.70547

109

0.48600

-10

62.2756

30

7.97078

70

1.64691

110

0.47256

-9

58.7079

31

7.62411

71

1.59068

111

0.45957

-8

56.3694

32

7.29464

72

1.53668

112

0.44699

-7

52.2438

33

1.48481

113

0.43482

-6

49.3161

34

1.43498

114

0.42304

-5

46.5725

35

1.38703

115

0.41164

-4

44.0000

36

1.34105

116

0.40060

-3

41.5878

37

1.29078

117

0.38991

-2

39.8239

38

1.25423

118

0.37956

-1

37.1988

39

1.21330

119

0.36954

0

35.2024

40

1.17393

120

0.35982

1

33.3269

41

1.13604

121

0.35042

2

31.5635

42

1.09958

122

0.3413

3

29.9058

43

1.06448

123

0.33246

4

28.3459

44

1.03069

124

0.32390

5

26.8778

45

4.21263

85

0.99815

125

0.31559

6

25.4954

46

4.04589

86

0.96681

126

0.30754

7

24.1932

47

3.88673

87

0.93662

127

0.29974

8

22.5662

48

3.73476

88

0.90753

128

0.29216

9

21.8094

49

3.58962

89

0.87950

129

0.28482

10

20.7184

50

3.45097

90

0.85248

130

0.27770

11

19.6891

51

3.31847

91

0.82643

131

0.27078

12

18.7177

52

3.19183

92

0.80132

132

0.26408

13

17.8005

53

3.07075

93

0.77709

133

0.25757

14

16.9341

54

2.95896

94

0.75373

134

0.25125

15

16.1156

55

2.84421

95

0.73119

135

0.24512

16

15.3418

56

2.73823

96

0.70944

136

0.23916

17

14.6181

57

2.63682

97

0.68844

137

0.23338

18

13.9180

58

2.53973

98

0.66818

138

0.22776

19

13.2631

59

2.44677

99

0.64862

139

0.22231

Appendix 1: Indoor Temp. and Pipe Temp. Sensor Resistance Value Table (℃--K)

K Ohm ℃

6.98142 73

6.68355 74

6.40021 75

6.13059 76

5.87359 77

5.62961 78

5.39689 79

5.17519 80

4.96392 81

4.76253 82

4.57050 83

4.38736 84

98

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