MAXA MI26A1 Operating manual

MAXA DC Fan Coil Unit

Wall-mounted

Technical Service Manual

MAXA reserves the right to discontinue, or change specification or designs at any time without notices and without incurring obligations.

MI26A1

MI35A1

MI42A1

MAXA DC Fan Coil Unit

Wall-mounted

DC Fan Coil Unit

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

2.Features..........................................................................................3

3. Product lineup...............................................................................3

4. Accessories...................................................................................4

5. Specifications................................................................................5

6. Capacity table................................................................................9

7. Dimension....................................................................................36

8. Sound Levels...............................................................................41

9. Service Spaces............................................................................41

10. Wiring Diagrams........................................................................39

11.Trouble-shooting:.......................................................................40

12. Installation .................................................................................42

MAXA DC Fan Coil Unit

1. External Appearance

type panel

MAXA DC Fan Coil Unit

2. Features

Multi-connection outlet pipe method: left\right\rear, satisfy the need of different rooms.

Cross flow fan creates quiet and comfortable environment.

Built-in the 3-way electromagnetic valve.

Built-in network interface module.

Easy maintenance has been realized as the front panel can be removed for easy access.

Excellent efficiency

MAXA DC FCU adopt the brushless DC motor, the DC motor efficiency is up to 90%. The power consumption

of DC FCU can be reduced by more than 30% in contrast to the corresponding AC FCU.

DC brushless motor

The motor adopts fully enclosed structure design; it is energy-saving, of high operating efficiency and durable

motor. The motor bearing can operate 80,000 hours continuously, and easy for maintenance.

Low noise

Advanced 3-D spiral fan design reduces air resistance and operating sound. The motor bearing with unique

design makes less operation vibration.

3. Product lineup

Type

250

300

400

500

600

Wall Mounted S Type Panel ●●●●●

MAXA DC Fan Coil Unit

4. Accessories

4.1 Standard accessories

Accessory name

Qty.

Shape

Usage

Owner’s & installation manual

Installation guide

Screw ST3.9x25 for installation

board

Screw the installation board

Plastic expanded tube

Wrapping tape

Drain pipe

Wall conduit cover

Remote controller& Its Frame

Remote controller

R05/BGE

Frame

Mounting screw(ST2.9x10-C-H)

Alkaline dry batteries

Remote controller manual

Seet gasket

For conner water pipe

4.2 Optional accessories

Accessory name

Qty.

Shape

Usage

Wired controller

KJR-12B/D

Wired control

Central controller

CCM03

Central control

MAXA DC Fan Coil Unit

5. Specifications

Model

MI26A1 MI35A1

Power supply

V/Ph/H

Air flow (H/M/L)

m3/h

492/454/400

825/689/590

CFM

289/267/235

485/405/347

Cooling1

Capacity (H/M/L)

2.7/2.59/2.39

3.81/3.3/2.88

Water flow rate(H/M/L)

m3/h

0.48/0.46/0.42

0.67/0.57/0.51

Water pressure

drop(H/M/L)

kPa

31.61/28.63/25.3

56.75/41.23/33.0

Power input(H/M/L)

13/11/10

34/22/15

Heating2

Capacity (H/M/L)

2.94/2.8/2.58

4.3/3.65/3.09

Water flow rate(H/M/L)

m3/h

0.51/0.49/0.46

0.73/0.64/0.56

Water pressure

drop(H/M/L)

kPa

32.66/34.89/30.2

51.86/47.53/35.6

Power input(H/M/L)

11/11/9

31/20/14

Heating3

Capacity (H/M/L)

3.29/3.03/2.63

5.08/4.33/3.77

Water flow rate(H/M/L)

m3/h

0.48/0.46/0.42

0.67/0.57/0.51

Water pressure

drop(H/M/L)

kPa

37.49/30.25/26.5

61.94/37.88/30.3

Power input(H/M/L)

12/10/8

31/20/14

Sound pressure level (H/M/L)

dB(A)

32/30/27

45/39/35

Rated current

0.2

0.4

Fan motor

Type

DC Motor

Quantity

Fan

Type

Tangential fan

Quantity

Coil

Row

Max. Working pressure

MPa

1.6

Coil length x height

635x26.74

Fin spacing

1.5

Fin type

Hydrophilic aluminium

Number of circuits

Diameter

Φ7

Body

Net dimensions (W×H×D)

915×290×230

Packing size (W×H×D)

1020×390×315

Net weight

12.7

Gross weight

17.3

16.3

Pipe

connection

Water inlet/outlet pipe

inch

RC3/4

Drain pipe

ODΦ20

Note:

Based on Eurovent conditions:

H: High fan speed; M: Medium fan speed; L: Low fan speed.

1 :Cooling mode (2 and 4-pipe coil): entering air temperature 27°C DB/1 9°C WB, entering/leaving water temperature 7°C /12°C, high fan speed.

2 :Heating mode（1）: (2-pipe coil): entering air temperature 20°C DB, entering/leaving water temperature 45/40°C, high fan speed.

3 :Heating mode（2）: (2-pipe coil): entering air temperature 20° C DB, enter water teperaure/water flow 50℃/* (same water flow as in standard rating condition in

cooling)

MAXA DC Fan Coil Unit

(specifications)

Model

MI42A1

Power supply

V/Ph/Hz

220-240/1/50

Air flow (H/M/L)

m3/h

862/741/634

CFM

507/435/372

Cooling1

Capacity (H/M/L)

4.47/3.98/3.48

Water flow rate(H/M/L)

m3/h

0.77/0.68/0.61

Water pressure drop(H/M/L)

kPa

41.17/33.54/27.05

Power input(H/M/L)

26/18/13

Heating2

Capacity (H/M/L)

4.84/4.23/3.62

Water flow rate(H/M/L)

m3/h

0.84/0.73/0.64

Water pressure drop(H/M/L)

kPa

36.82/33.83/26.26

Power input(H/M/L)

22/16/12

Heating3

Capacity (H/M/L)

5.68/4.94/4.24

Water flow rate(H/M/L)

m3/h

0.77/0.68/0.61

Water pressure drop(H/M/L)

kPa

43.74/29.69/23.98

Power input(H/M/L)

23/16/12

Sound pressure level (H/M/L)

dB(A)

38/34/30

Rated current

0.3

Fan motor

Type

DC Motor

Quantity

Fan

Type

Tangential fan

Quantity

Coil

Row

Max. Working pressure

MPa

1.6

Coil length x height

785x26.74

Fin spacing

1.5

Fin type

Hydrophilic aluminium

Number of circuits

Diameter

Φ7

Body

Net dimensions (W×H×D)

1072×315×230

Packing size (W×H×D)

1180×415×315

Net weight

15.1

Gross weight

Pipe connection

Water inlet/outlet pipe

inch

RC3/4

Drain pipe

ODΦ20

Note:

Based on Eurovent conditions:

H: High fan speed; M: Medium fan speed; L: Low fan speed.

1 :Cooling mode (2 and 4-pipe coil): entering air temperature 27°C DB/1 9°C WB, entering/leaving water temperature 7°C /12°C,

high fan speed.

2 :Heating mode（1）: (2-pipe coil): entering air temperature 20°C DB, entering/leaving water temperature 45/40°C,

high fan speed.

3 :Heating mode（2）: (2-pipe coil): entering air temperature 20°C DB, enter water teperaure/water flow 50℃/*

(same water flow as in standard rating condition in cooling)

MAXA DC Fan Coil Unit

Model MI 26A1 35A1

Air flow

H/M/L

m3/h

425/410/320

680/550/504

H/M/L

CFM

250/241/188

400/324/297

Cooling

Capacity

H/M/L

2.2/2.2/1.97

3.08/2.90/2.66

Water flow rate

L/h

378

530

Water pressure drop

kPa

23.1

Heating

Capacity

H/M/L

3.02/2.85/2.35

4.34/3.77/3.35

Water pressure drop

kPa

Power supply

V/Ph/Hz

Power input

10.7

Sound pressure level

H/M/L

dB(A)

30/26/23

36/32/29

Fan motor

Type

Quantity

Fan

Type

Quantity

Coil

Row

Max. Working pressure

MPa

Coil length x height

Fin spacing

Fin type

Hydrophilic aluminium

Number of circuits

Diameter

Body

Dimensions

W×H×D

915×290×210

Packing

W×H×D

1020×385×300

Net weight

Gross weight

15.6

Pipe

connection

Water inlet/outlet pipe

inch

Drain pipe

Note:

1. H: high speed; M: medium speed; L: low speed

2. Cooling Conditions: Entering water 7°C, temperature rise 5°C, entering air temperature 27°C DB,19°C WB.

Heating Conditions: Entering water 50°C, enter air temperature 20°C, the same water flow as the cooling conditions.

3. Noise is tested in semi-anechoic test room.

MAXA DC Fan Coil Unit

Model MI 42A1

Air flow

H/M/L

m3/h

850/692/586

H/M/L

CFM

500/407/345

Cooling

Capacity

H/M/L

4.07/3.78/3.05

Water flow rate

L/h

700

Water pressure drop

kPa

34.9

Heating

Capacity

H/M/L

5.69/4.14/3.63

Water pressure drop

kPa

29.7

Power supply

V/Ph/Hz

220-240/1/50

Power input

Sound pressure level

H/M/L

dB(A)

38/34/30

Fan motor

Type

DC Motor

Quantity

Fan

Type

Tangential fan

Quantity

Coil

Row

Max. Working pressure

MPa

1.6

Coil length x height

785x26.74

Fin spacing

1.5

Fin type

Hydrophilic aluminium

Number of circuits

Diameter

Φ7

Body

Dimensions

W×H×D

1070×315×210

Packing

W×H×D

1180×410×300

Net weight

14.7

Gross weight

18.6

Pipe

connection

Water inlet/outlet pipe

inch

RC3/4

Drain pipe

ODΦ20

Note:

1. H: high speed; M: medium speed; L: low speed

2. Cooling Conditions: Entering Water 7°C, temperature rise 5°C, entering air temperature 27°C DB,19°C WB.

Heating Conditions: Entering Water 50°C, entering air temperature 20°C, the same water flow as the cooling conditions.

3. Noise is tested in semi-anechoic test room.

MAXA DC Fan Coil Unit

6. Capacity Table

Cooling Capacity Table (S Panel)

MI26A1

EWT

ΔT

Indoor

temp

(W.B.)

Indoor temperature (D.B.)

WPD

℃

m3/h

kPa

m3/h

kPa

m3/h

kPa

m3/h

kPa

m3/h

kPa

2.34

1.79

0.67

28.87

2.32

2.05

0.67

28.53

2.33

2.32

0.67

28.71

2.56

0.73

33.83

2.81

0.8

39.57

3.04

1.75

0.87

45.27

3.02

2.02

0.87

44.89

2.98

2.27

0.85

43.85

2.88

2.49

0.83

41.4

2.9

2.76

0.83

41.92

3.79

1.71

1.09

66.58

3.77

1.98

1.08

66.02

3.75

2.24

1.08

65.36

3.69

2.48

1.06

63.37

3.61

2.71

1.04

61.09

4.19

1.69

1.2

79.27

4.17

1.96

1.2

78.68

4.15

2.22

1.19

78.02

4.11

2.47

1.18

76.64

4.03

2.7

1.16

73.86

2.17

1.71

0.46

15.44

2.16

1.97

0.46

15.34

2.25

0.48

16.42

2.49

0.53

19.52

2.73

0.59

22.91

2.86

1.67

0.61

24.83

2.85

1.94

0.61

24.63

2.82

2.19

0.6

24.15

2.72

2.41

0.58

22.71

2.79

2.71

0.6

23.77

3.62

1.64

0.78

37.12

3.6

1.9

0.77

36.81

3.58

2.16

0.77

36.46

3.52

2.4

0.76

35.39

3.43

2.63

0.74

33.83

4.02

1.62

0.86

44.42

1.88

0.86

44.1

3.98

2.14

0.86

43.74

3.94

2.4

0.85

3.85

2.62

0.83

41.24

1.99

1.62

0.34

9.04

2.02

1.91

0.35

9.36

2.16

0.37

10.5

2.41

0.41

12.6

2.65

0.46

14.85

2.68

1.59

0.46

15.13

2.67

1.86

0.46

15.02

2.65

2.11

0.45

14.78

2.57

2.35

0.44

14.1

2.69

2.67

0.46

15.23

3.44

1.56

0.59

23.11

3.42

1.82

0.59

22.91

3.41

2.08

0.58

22.71

3.36

2.33

0.58

22.15

3.25

2.55

0.56

20.93

3.84

1.54

0.66

27.86

3.82

1.8

0.66

27.67

3.81

2.07

0.65

27.44

3.77

2.32

0.65

27.03

3.67

2.54

0.63

25.78

1.8

1.54

0.26

4.54

1.91

1.86

0.27

5.43

2.08

0.3

6.86

2.33

0.33

8.65

2.57

0.37

10.32

2.49

1.51

0.36

9.75

2.48

1.77

0.36

9.69

2.46

2.03

0.35

9.55

2.45

2.29

0.35

9.45

2.6

0.37

10.5

3.26

1.48

0.47

15.35

3.24

1.74

0.46

15.21

3.22

0.46

15.08

3.18

2.25

0.46

14.77

3.07

2.47

0.44

13.91

3.65

1.45

0.52

18.67

3.64

1.72

0.52

18.54

3.62

1.98

0.52

18.39

3.59

2.24

0.51

18.15

3.5

2.47

0.5

17.32

1.81

1.55

0.52

18.37

1.86

1.84

0.53

19.2

2.06

0.59

22.96

2.31

0.66

27.88

2.56

0.73

33.16

2.5

1.51

0.72

31.89

2.49

1.78

0.71

31.64

2.47

2.04

0.71

31.26

2.4

2.27

0.69

29.7

2.56

0.73

33.19

3.26

1.47

0.93

50.29

3.24

1.74

0.93

49.82

3.22

0.92

49.38

3.18

2.25

0.91

48.19

3.05

2.46

0.88

44.99

3.65

1.45

1.05

61.37

3.64

1.72

1.04

60.93

3.62

1.98

1.04

60.39

3.59

2.24

1.03

59.49

3.47

2.46

56.28

1.64

1.47

0.35

9.46

1.76

0.38

10.7

1.99

0.43

13.11

2.23

0.48

16.01

2.48

0.53

19.13

2.31

1.43

0.5

16.99

2.31

1.7

0.5

16.9

2.29

1.96

0.49

16.72

2.29

2.22

0.49

16.68

2.48

0.53

19.15

3.07

1.4

0.66

27.56

3.05

1.66

0.66

27.3

3.04

1.92

0.65

27.06

2.18

0.65

26.53

2.88

2.39

0.62

24.71

3.47

1.37

0.75

33.93

3.45

1.64

0.74

33.69

3.44

1.91

0.74

33.39

3.41

2.16

0.73

32.96

3.31

2.39

0.71

31.26

1.5

1.41

0.26

4.81

1.67

0.29

6.42

1.91

0.33

8.32

2.16

0.37

10.28

2.4

0.41

12.35

2.12

1.34

0.36

9.95

2.11

1.61

0.36

9.94

2.12

1.88

0.36

9.96

2.19

2.18

0.38

10.57

2.4

0.41

12.36

2.88

1.31

0.5

16.79

2.86

1.58

0.49

16.62

2.85

1.84

0.49

16.49

2.7

2.15

0.48

31.61

2.72

2.33

0.47

15.24

3.28

1.29

0.56

20.91

3.26

1.56

0.56

20.76

3.25

1.83

0.56

20.58

3.22

2.09

0.55

20.34

3.14

2.32

0.54

19.47

1.38

1.36

0.2

2.22

1.58

0.23

3.12

1.83

0.26

5.04

2.08

0.3

6.92

2.32

0.33

8.52

1.9

1.25

0.27

5.67

1.91

1.53

0.27

5.74

1.98

1.83

0.28

6.23

2.1

0.3

7.09

2.32

0.33

8.53

2.68

1.23

0.38

10.84

2.66

1.5

0.38

10.72

2.65

1.76

0.38

10.65

2.63

2.02

0.38

10.5

2.56

2.26

0.37

10.04

3.08

1.21

0.44

13.72

3.06

1.48

0.44

13.61

3.05

1.74

0.44

13.49

3.03

2.01

0.43

13.36

2.96

2.25

0.42

12.86

1.34

0.38

10.87

1.56

0.45

14.02

1.81

0.52

18.07

2.06

0.59

22.52

2.31

0.66

27.35

1.93

1.27

0.55

20.1

1.93

1.54

0.55

20.12

1.93

1.81

0.55

20.18

2.06

0.59

22.61

2.31

0.66

27.37

2.69

1.23

0.77

35.52

2.67

1.5

0.77

35.11

2.66

1.76

0.76

34.82

2.64

2.02

0.76

34.4

2.54

2.25

0.73

32.23

3.08

1.21

0.88

44.99

3.07

1.48

0.88

44.64

3.05

1.74

0.88

44.21

3.03

2.01

0.87

43.79

2.95

2.24

0.85

41.88

1.25

0.27

5.54

1.48

0.32

7.83

1.73

0.37

10.24

1.98

0.43

12.86

2.23

0.48

15.7

1.72

1.18

0.37

10.11

1.73

1.46

0.37

10.24

1.81

1.76

0.39

10.99

1.98

0.43

12.88

2.23

0.48

15.71

2.49

1.15

0.53

18.92

2.47

1.42

0.53

18.68

2.46

1.69

0.53

18.57

2.45

1.95

0.53

18.37

2.38

2.19

0.51

17.59

2.88

1.13

0.62

24.35

2.87

1.4

0.62

24.14

2.85

1.67

0.61

23.91

2.84

1.93

0.61

23.7

2.78

2.17

0.6

22.87

1.15

0.2

2.2

1.4

0.24

4.08

1.65

0.28

6.33

1.9

0.33

8.18

2.15

0.37

10.08

1.5

1.09

0.26

5.08

1.56

1.39

0.27

5.62

1.7

0.29

6.71

1.9

0.33

8.19

2.15

0.37

10.09

2.27

1.07

0.39

11.07

2.26

1.34

0.39

10.93

2.26

1.6

0.39

10.91

2.25

1.87

0.39

10.83

2.26

2.14

0.39

10.95

2.68

1.05

0.46

14.61

2.66

1.32

0.46

14.45

2.65

1.59

0.46

14.32

2.64

1.85

0.45

14.22

2.59

2.1

0.45

13.79

1.06

0.15

1.58

1.31

0.19

2.01

1.57

0.22

3.31

1.82

0.26

5.25

2.07

0.3

6.88

1.28

1.01

0.18

1.93

1.43

1.34

0.2

2.41

1.6

0.23

3.57

1.82

0.26

5.25

2.07

0.3

6.88

2.04

0.98

0.29

6.67

2.03

1.25

0.29

6.6

2.04

1.52

0.29

6.66

2.07

1.8

0.3

6.83

2.15

2.1

0.31

7.34

2.46

0.97

0.35

9.23

2.44

1.23

0.35

9.1

2.43

1.5

0.35

9.04

2.43

1.77

0.35

9.02

2.39

2.02

0.34

8.83

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