Acson international A5DB125H-FMBNA, A5DB80H-AMBHA, A5DB200H2-FMBNA, A5DB250H2-FMBRA, A5DB150H-FMBNA Technical Manual

Technical Manual

SPLIT SYSTEMS
AIR CONDITIONER

DUCTED BLOWER
H SERIES

A5DB-H series

Cooling only [50Hz]

R410A

TM-5SB-H-AM-A4

SPLIT SYSTEMS AIR CONDITIONER
DUCTED BLOWER H SERIES

CONTENTS

1.

NOMENCLATURE

• Indoor

• Outdoor

• Product Line-Up

2. APPLICATION INFORMATION

• Operating Range

• Refrigerant Circuit Diagram

• Installation Guideline

3.

4.

5.

6.

7.

SOUND DATA

• Sound Pressure Level

• Sound Power Level

• NC Curv

SELECTION PROCESS

ENGINEERING & PHYSICAL DATA

PERFORMANCE DATA

• Calculation Steps

• Performance Tables

OUTLINE AND DIMENSION

8. WIRING DIAGRAMS

P.1

P.5

P.15

P.24

P.42

P.46

P.62

P.86

9. SERVICING AND MAINTENANCE

10. TROUBLESHOOTING

* All specifications stated in this technical manual are for Cooling Only unit.

Please contact us for more information about Heat Pump unit.

P.88

P.90

NOMENCLATURE

Indoor

A

Brand

A: Acson

Refrigerant

5: R410A

Product Type

DB: Ducted Blower

Capacity

250: 250,000 Btu/hr

Product Series

H: H series

No. of Circuits

“ ” : 1 Circuit
“2” : 2 Circuits
“3” : 3 Circuits
“4” : 4 Circuits
“5” : 5 Circuits

DB 250 H

5

2

-

F

M

B R

A

Product Specifi cation
Variation

A: Revision

Air Discharge Orientation

H: Horizontal and Not Convertible
N: Horizontal and Convertible
R: Vertical and Convertible
V: Vertical and Not Convertible

Evaporator Fin Type

B: Hydrophilic Blue

Market

M: Malaysia

Electrical Characteristics

A: 1 Phase 50Hz 220-240V
F: 3 Phase 50Hz 380-415V

1

Outdoor

A

5

Brand

A: Acson

Refrigerant

5: R410A

Product Type

MC: Modular Condensing Unit

Capacity

125: 125,000 Btu/hr

Product Series

H: H series

MC 125 H

-

F

M

G R

A

Product Specifi cation
Variation

A: Revision

Air Discharge Orientation

H: Horizontal and Not Convertible
R: Vertical and Convertible

Condenser Fin Type

G: Microchannel
F: E-coating Microchannel

Market

M: Malaysia

Power Supply

Y1: 3 Phase 50Hz 380-415V

2

Product Line-Up

Indoor Unit
A5DB-H

Classifi cation

Control

Nomenclature

W/out Control Module

W/out Contactor

A5DB80H AMBHA X X XXX X X

A5DB100H AMBHA X X XXX X X

A5DB125H FMBNA X X XXXX X

A5DB150H FMBNA X X XXXX X

A5DB200H2 FMBNA X X XXXX X

A5DB250H2 FMBRA X X XXX X X

A5DB300H2 FMBRA X X XXX X X

A5DB300H3 FMBRA X X XXX X X

COOLING

A5DB350B3 FMBRA X X XXX X X

Fin

Bare Aluminium

Hydrophilic Coated

Handset

Refrigerant Control

Air Filter

W/out Handset

TXV

W/out Air Filter

Air Discharge

Horizontal & Convertible

Horizontal & Not Convertible

Vertical & Convertible

Vertical & Not Convertible

A5DB400H4 FMBRA X X XXX X X

A5DB450H3 FMBRA X X XXX X X

A5DB500H4 FMBRA X X XXX X X

XXXXXXXAVBMF4H006BD5A

XXXXXXXAVBMF5H057BD5A

3

Outdoor Unit
A5MC-H

Classifi cation

Control

Nomenclature

W/out Contactor

With HP/LP Switch/Sensor

With Phase Sequential Protector

A5MC80H FMGHA XXX X X

A5MC80H FMFHA X X X X X

COOLING

A5MC100H FMFRA X X X X X

Fin

Microchannel

E-coating Microchannel

Air Discharge

Horizontal & Convertible

Horizontal & Not Convertible

Vertical & Convertible

Vertical & Not Convertible

XXXXXARGMFH001CM5A

XXXXXARGMFH521CM5A

XXXXXARGMFH051CM5A

A5MC125H FMFRA X X X X X

A5MC150H FMFRA X X X X X

4

APPLICATION INFORMATION

Operating Range

Ensure the operating temperature is in allowance range.

Cooling

Outdoor
DB (°C)

46

43

The use of your air conditioner
outside the range of working
temperature and humidity can
result in serious failure.

19

Cooling Operation Range
DB: Dry Bulb
WB: Wet Bulb

23 )C°( BW roodnI41

5

Refrigerant Circuit Diagram

Cooling Only

Outdoor

A5MC100H x 2

Indoor

A5DB200H2

A5MC125H x 2

A5MC150H x 2

A5DB250H2

A5DB300H2

A5MC100H x 3

A5MC100H x 1

A5MC125H x 2

A5DB300H3

A5DB350H3

A5MC150H x 3

A5MC100H x 4

A5DB450H3

A5DB400H4

A5MC125H x 4

A5MC150H x 4

A5DB500H4

A5DB600H4

A5MC150H x 5

A5DB750H5

System

1 IDU

2 ODU

1 IDU

3 ODU

1 IDU

4 ODU

1 IDU

5 ODU

6

Installation Guideline

INDOOR

PRELIMINARY SITE SURVEY

a) Electrical supply and installation is to conform to local authority’s (e.g. National Electricity Board) codes

and regulations.

b) Voltage supply fluctuation must not exceed +/- 10% of rated voltage. Electricity supply line must be

independent of welding transformers which can cause supply fluctuation.

c) Ensure that the location is convenient for wiring and piping.

MOUNTING

a) For ceiling mounted models, locate a position where piping and ducting work can be kept to a minimum.

Ensure that overhead supports are strong enough to hold the unit’s weight. Position hanger rods and
check for alignment with the unit. Check that hangers are secure and that the base of fan-coil unit is level
in two horizontal directions.

DRAINAGE PIPE SIDE

PIPINGS

Do not use contaminated or damaged copper tubings. If pipings, evaporator or condenser are exposed or
had been opened for 15 seconds or more, vacuum and purge with field supplied refrigerant. Generally, do
not remove plastic/rubber plugs/caps from fittings, tubings and coils until ready to connect suction or liquid
line into fittings.

OPERATIONAL CHECK

After all electrical wiring is completed and the system is charged with refrigerant, make sure unit is operating
properly. Check that:

a) Condenser fans are running, with warm air blowing off the condenser coil.
b) Evaporator blowers are running and discharging cool air.
c) Suction line inside condensing unit feels cool.
d) Liquid line inside condensing unit feels warm.

ELECTRICAL CONNECTION

As wiring regulations differ from country to country, please refer to your LOCAL ELECTRICAL CODES for
 eld wiring regulations and ensure that these are complied with. Besides, observe the following general
precautions:

a) Ensure that the rated voltage of the unit corresponds to that of the name plate before commencing wiring

work.

b) Provide a power outlet to be used exclusively for each unit. A power supply disconnect and a circuit

breaker for over-current protection should be provided in the exclusive line.
c) The unit must be GROUNDED to prevent possible hazard due to insulation failure.
d) All wiring must be firmly connected.
e) Electrical wiring must not touch the refrigerant piping, compressor and any moving parts of the fan

motors.

7

INDOOR CLEARANCE

Mounting

Ensure that the overhead supports are strong enough to hold the unit’s weight. Position hanger rods and
check for alignment with the unit. Check that hangers are secure and that the base of fan-coil unit is level in
the two horizontal directions, taking into account the gradient recommended for drainage flow as shown.

Check the gradient recommended for drainage flow as follow.

Provide clearance for servicing and optimal air flow as shown in the diagram.

The indoor unit must be installed such that there is no short circuit of cool discharge with air discharge.
Respect the installation clearance.
Do not put the indoor unit where there is direct sunlight on unit. The location is suitable for piping and
drainage and it must be have a large distance between a door and unit.

50mm

300mm

10.0

300mm

300mm*

500mm

* for free return of air

Horizontal air discharge

A

All dimensions in mm

B

A

Vertical air discharge

B

A

D

C

Model A5DB80/100H A5DB125/150/200H A5DB250/300/350H A5DB400/450/500H

A5DB600/750H

A (mm) 800 800 800 800

B (mm) 800 800 800 800

008008--)mm( C

D (mm) - - 1000 1500

8

OUTDOOR

LOCATION FOR INSTALLATION OF THE CONDENSING UNITS

As condensing temperature rises, evaporating temperature rises and cooling capacity drops. In order to
achieve maximum cooling capacity, the location selected should ful fill the following requirements:-

a) Install the condensing (outdoor) unit in a way such that hot air distributed by the outdoor condensing unit

cannot be drawn in again (as in the case of short circuit of hot discharge air). Allow sufficient space for

maintenance around the unit.

b) Ensure that there is no obstruction of air

intake or discharge.

c) The location must be well ventilated, so that the unit can draw and distribute plenty of air thus lowering

the condensing temperature.
d) A place capable of bearing the weight of the outdoor unit and isolating noise and vibration.
e) A place protected from direct sunlight. Otherwise use an awning for protection, if necessary.
f) A place where the hot air discharge and operating sound level will not annoy the neighbours.
g) The location must not be susceptible to dust or oil mist.

flow into or out of the unit. Remove obstacle which block air

If the condensing unit is operated in an atmosphere containing oils (including machine

oils), salt (coastal area), sulphide gas (near hot spring, oil refinery plant), such as

substances may lead to failure of the unit.

9

OUTDOOR CLEARANCE

SINGLE UNIT

300

PATTERN 1

300

600

300

1500

PATTERN 1

TOP VIEW

PATTERN 2

TOP VIEWTOP VIEW

300 600

A5MC80H

PATTERN 2

1200

TOP VIEW

PATTERN 1

300100

600

TOP VIEW TOP VIEW

600

SIDE VIEW

300

PATTERN 3

<1500

1500

PATTERN 2

FRONT VIEW

A5MC100/125/150H VERTICAL A5MC100/125/150H HORIZONTAL

1500

100

300

SERVICE PANEL

AIR DISCHARGE
DIRECTION

WALL / CEILING

AIR DISCHARGE GRILL

NOTE :

1) ALL DIMENSION ARE IN MM.

2) ALL DIMENSION MENTIONED ARE
MINIMUM DISTANCE REQUIRED.
UNLESS OTHERWISE SPECIFIED.

Unit Lifting
a) By pallet truck / fork lift

b) By crane

LEFT BY PALLET TRUCK/FOKLIFT

LEFT BY CRANE USING BELT

CONNECT TO 4 CORNER HOIST BRACKET

REMOVE THE TOP CRATE

Step 1 Step 2

10

CABLE SIZE

Cooling only

Model Unit

Voltage range**

Power supply cable size*

a) Indoor Unit
b) Outdoor Unit
c) Total

Number of conductors

a) Indoor Unit
b) Outdoor Unit

Interconnection cable size*
Number of conductors

Recommended fuse/
circuit breaker rating*

a) Indoor Unit
b) Outdoor Unit
c) Total

Model Unit

Voltage range**

Power supply cable size*

a) Indoor Unit
b) Outdoor Unit
c) Total

Number of conductors

a) Indoor Unit
b) Outdoor Unit

Interconnection cable size*
Number of conductors

Recommended fuse/
circuit breaker rating*

a) Indoor Unit
b) Outdoor Unit
c) Total

Indoor

Outdoor

2

mm

2

mm

2

mm

2

mm

A
A
A

Indoor

Outdoor

2

mm

2

mm

2

mm

2

mm

A
A
A

A5DB80H A5DB100H A5DB125H

A5MC80H A5MC100H A5MC125H

380 - 415V / 3Ph /50Hz + N +

380 - 415V / 3Ph /50Hz + N +

1.0

2.5

2.5

-

5

1
4

6
32
32

1.0

2.5

2.5

-

5

1
4

16
32
40

1.0

2.5

2.5

5
5

-

-

4
40
40

A5DB150H A5DB200H2 A5DB250H2

A5MC150H

A5MC100H x 2 A5MC125H x 2

380 - 415V / 3Ph /50Hz + N +

380 - 415V / 3Ph /50Hz + N +

1.0

4.0

4.0

5
5

-

-

6
50
50

1.0

2.5

6.0

5
5

-

-

10
32
50

1.0

2.5

10.0

5
5

-

-

16
40
63

11

Model Unit

Voltage range**

Power supply cable size*

a) Indoor Unit
b) Outdoor Unit
c) Total

Number of conductors

a) Indoor Unit
b) Outdoor Unit

Interconnection cable size*
Number of conductors

Recommended fuse/
circuit breaker rating*

a) Indoor Unit
b) Outdoor Unit
c) Total

Indoor

Outdoor

2

mm

2

mm

2

mm

2

mm

A
A
A

A5DB300H2 A5DB300H3 A5DB350H3

A5MC150H

x 2

A5MC100H

x 3

A5MC100H

380 - 415V / 3Ph /50Hz + N +

A5MC125H

380 - 415V / 3Ph /50Hz + N +

1.0

4.0

16.0

5
5

-

-

16
50
80

1.0

2.5

16.0

5
5

-

-

16
40
63

1.0

2.5

16.0

5
5

-

-

16
32
80

x 2

-

-

16
40
80

Model Unit

Voltage range**

Power supply cable size*

a) Indoor Unit
b) Outdoor Unit
c) Total

Number of conductors

a) Indoor Unit
b) Outdoor Unit

Interconnection cable size*
Number of conductors

Recommended fuse/
circuit breaker rating*

a) Indoor Unit
b) Outdoor Unit
c) Total

Indoor

Outdoor

2

mm

2

mm

2

mm

2

mm

A
A
A

A5DB400H4 A5DB450H3 A5DB500H4

A5MC100H x 4

380 - 415V / 3Ph /50Hz + N +

A5MC150H x 3 A5MC125H x 4

380 - 415V / 3Ph /50Hz + N +

1.0

2.5

25.0

5

5

-

-

20
32
80

1.0

4.0

25.0

5
5

-

-

20
50

100

2.5

2.5

25.0

5
5

-

-

32
40

100

12

Model Unit

Voltage range**

Indoor

Outdoor

A5MC150H x 4 A5MC150H x 5

380 - 415V / 3Ph /50Hz + N +

380 - 415V / 3Ph /50Hz + N +

Power supply cable size*

a) Indoor Unit
b) Outdoor Unit
c) Total

mm
mm
mm

2

2

2

2.5

4.0

35.0

2.5

4.0

50.0

Number of conductors

a) Indoor Unit
b) Outdoor Unit

Interconnection cable size*
Number of conductors

mm

5
5

2

-

-

5
5

-

-

Recommended fuse/
circuit breaker rating*

a) Indoor Unit
b) Outdoor Unit
c) Total

A
A
A

32
50

125

50
50

175

IMPORTANT:
* These values are for information only. They should be checked and selected to

comply with local and/or national codes and regulations.
They are also subject to the type of installation and size of conductors.

** The appropriate voltage range should be checked with label data on the unit.

5H057BD5A4H006BD5A

13

REFRIGERANT PIPING

Maximum Piping Length and Maximum Number of Bends

When the pipe length becomes too long, both the capacity and reliability will drop and as the number of
bends increases, system piping resistance to the refrigerant flow increases, thus lowering the cooling
capacity. As a result the compressor may become defective. Always choose the shortest path and follow the
recommendation as tabulated below:

Cooling Only Model

Outdoor A5MC80/100/125/150H

Maximum Allowable Length, m 75

Maximum Allowable Elevation, m 30

Equivalent length for various fitting (meter)

tnioj LeziS epiP Trap bend

03.181.0)mm25.9 DO( ”8/3

05.102.0 )mm07.21 DO( ”2/1

00.252.0)mm88.51 DO( ”8/5

01.253.0 )mm50.91 DO( ”4/3

00.304.0 )mm32.22 DO( ”8/7

04.354.0 )mm04.52 DO( ”1

07.305.0 )mm85.82 DO( ”8/1 1

04.406.0 )mm29.43 DO( ”8/3 1

Notes:

1. Equivalent piping length is obtained with actual length of gas piping.

2. 90° bend of piping is equivalent to L joint.
Bending must be carefully made so as not to crush the pipe.
Use a pipe bender to bend a pipe where possible.

CAUTION

Our guarantee on the performance of our air-conditioners is strictly revoked if the height

and/or length of the refrigerant piping system installed is beyond the limit above.

Additional Charge

For Brazed type, if the piping is less than 7.5m, follow the charge level on serial number sticker. When the
piping is more than 7.5m, use the table below.

R410A

Liquid Pipe OD (in) Additional Charge (kg/m)

80.0’’2/1

41.0’’8/5

NOTE:
The additional refrigerant charge amount recommended is a guideline for long piping
application. The actual charge required may be different from the guideline due to different
application and variation in site condition.

14

SOUND DATA

SOUND PRESSURE LEVEL

Indoor

Model Speed

High 57 48 50 45 46 40 29 52 47

A5DB80H

A5DB100H

A5DB125H High 53 52 53 46 43 39 28 53 49

A5DB150H High 54 54 56 48 45 41 32 56 53
A5DB200H2 High 58 60 60 55 54 48 42 61 57
A5DB250H2 High 62 57 59 59 57 52 43 63 58

A5DB300H2/H3 High 66 60 62 61 59 54 44 66 60

A5DB350H3 High 67 60 62 62 59 54 44 66 61
A5DB400H4 High 67 64 63 63 59 54 45 66 62
A5DB450H3 High 68 64 65 63 60 55 46 68 62
A5DB500H4 High 69 66 66 64 61 56 47 68 63
A5DB600H4 High 70 68 68 66 62 57 48 70 65
A5DB750H5 High 71 69 69 67 63 57 48 71 66

Med 55 48 51 45 46 39 28 52 47

Low 60 47 50 44 45 38 27 52 46
High 64 54 52 48 48 42 34 55 50
Med 64 53 51 47 48 42 33 54 50

Low 64 52 50 45 48 41 32 54 50

125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz

1/1 Octave Sound Pressure (dB, ref 20μPa)

Overall

(dBA)

Criteria

Noise

A5DB80H
A5DB100H
A5DB125H
A5DB150H
A5DB200H2

noitacoL gnirusaeM ledoM roodnI

2m discharge duct length

UNIT

1.5m

1m return duct length

Microphone position:

1.5m below centre of the unit.
(Tested with 2m length duct at the air discharge outlet and 1m length air return inlet)

Standard: JIS B 8615

15

A5DB250H2
A5DB300H2/H3
A5DB350H3
A5DB400H4
A5DB450H3
A5DB500H4
A5DB600H4
A5DB750H5

noitacoL gnirusaeM ledoM roodnI

UNIT

2m discharge duct length

1m

1m

Microphone position:
1m away from every side panel of the unit and 1m above the fl oor level.
(Tested with 2m length duct at the air discharge outlet only)

Standard: JIS B 8615

Free return duct

Sound Power Level

Model Speed

*A5DB80H

*A5DB100H

High

Med

Low

High

Med

Low

125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz

68 67 70 69 64 62 54 73

69 64 68 68 61 59 60 70

66 62 66 63 58 56 46 67

74 72 74 73 66 65 59 77

73 70 73 71 64 62 55 75

70 68 71 68 60 59 49 72

1/1 Octave Sound Power Level (dB) ref 1pW

*A5DB125H High 75 76 78 70 69 62 58 78

*A5DB150H High 74 77 78 75 72 69 63 80

*A5DB200H2 High 83 84 83 81 77 73 68 85

A5DB250H2 High 85 86 85 83 79 75 70 87

A5DB300H2/H3 High 87 88 87 85 81 77 72 89

A5DB350H3 High 90 91 90 87 84 80 75 92

A5DB400H4 High 88 89 88 86 82 78 73 90

A5DB450H3 High 91 92 91 89 85 81 76 93

A5DB500H4 High 94 95 94 92 88 84 79 96

A5DB600H4 High 87 88 87 85 81 77 72 89

A5DB750H5 High 91 92 91 89 85 81 76 93

Overall

(dBA)

*Remarks: Test with 5ft length discharge duct, terminated flush with the internal wall of reverberation room.

16

NC Curve

80

A5DB80H

70

Pa)

μ

60

H

M

L

50

40

30

Sound pressure level (dB, ref 20

20

10

NC70

NC65

NC60

NC55

NC50

NC45

NC40

NC35

NC30

NC25

NC20

0008000400020001005052521

Octave-band frequency (Hz)

A5DB100H

17

Sound pressure level (dB, ref 20μPa)

80

70

60

NC70

NC65

NC60

50

40

H

M

L

NC55

NC50

NC45

NC40

30

NC35

NC30

20

NC25

NC20

10

0008000400020001005052521

Octave-band frequency (Hz)

A5DB125H

80

Sound pressure level (dB, ref 20μPa)

70

60

NC70

NC65

NC60

50

40

H

NC55

NC50

NC45

NC40

30

NC35

NC30

20

NC25

NC20

10

0008000400020001005052521

Octave-band frequency (Hz)

A5DB150H

80

70

μPa)

60

50

40

30

Sound pressure level (dB, ref 20

20

10

H

Octave-band frequency (Hz)

NC70

NC65

NC60

NC55

NC50

NC45

NC40

NC35

NC30

NC25

NC20

0008000400020001005052521

18

A5DB200H2

80

Sound pressure level (dB, ref 20μPa)

70

70

60

H

50

40

30

20

10

NC70

NC65

NC60

NC55

NC50

NC45

NC40

NC35

NC30

NC25

NC20

0008000400020001005052521

Octave-band frequency (Hz)

A5DB250H2

19

60

H

NC-55

50

NC-50

NC-45

40

NC-40

NC-35

30

NC-30

NC-25

20

Sound pressure level (dB, ref 20μPa)

10

0

125 250 500 1000 2000 4000 8000

NC-20

Octave-band frequency (Hz)

A5DB300H2

70

60

NC-55

50

40

30

20

Sound pressure level (dB, ref 20μPa)

10

0

125 250 500 1000 2000 4000 8000

NC-50

NC-45

NC-40

NC-35

NC-30

NC-25

NC-20

Octave-band frequency (Hz)

H

A5DB300H3

70

60

50

40

30

20

10

Sound pressure level (dB, ref 20μPa)

0

125 250 500 1000 2000 4000 8000

H

NC-45

NC-35

Octave-band frequency (Hz)

NC-55

NC-50

NC-40

NC-30

NC-25

NC-20

20

A5DB350H3

70

H

60

NC-55

50

40

30

20

Sound pressure level (dB, ref 20μPa)

10

0

125 250 500 1000 2000 4000 8000

Octave-band frequency (Hz)

NC-50

NC-45

NC-40

NC-35

NC-30

NC-25

NC-20

21

A5DB400H4

70

H

60

NC-55

50

40

30

20

Sound pressure level (dB, ref 20μPa)

10

0

125 250 500 1000 2000 4000 8000

Octave-band frequency (Hz)

NC-50

NC-45

NC-40

NC-35

NC-30

NC-25

NC-20

A5DB450H3

70

H

60

NC-55

50

40

30

20

Sound pressure level (dB, ref 20μPa)

10

0

125 250 500 1000 2000 4000 8000

Octave-band frequency (Hz)

NC-50

NC-45

NC-40

NC-35

NC-30

NC-25

NC-20

A5DB500H4

70

60

50

40

30

20

Sound pressure level (dB, ref 20μPa)

10

0

125 250 500 1000 2000 4000 8000

H

Octave-band frequency (Hz)

NC-55

NC-50

NC-45

NC-40

NC-35

NC-30

NC-25

NC-20

22

A5DB600H4

70

H

60

NC-55

50

40

30

20

Sound pressure level (dB, ref 20μPa)

10

0

125 250 500 1000 2000 4000 8000

Octave-band frequency (Hz)

NC-50

NC-45

NC-40

NC-35

NC-30

NC-25

NC-20

A5DB750H5

90

80

70

60

50

40

30

20

Sound Pressure Level (dB, ref 20

10

0

125 250 500 1000 2000 4000 8000

H

NC-50

Octave-band Freque ncy (Hz)

NC-70

NC-65

NC-60

NC-55

NC-45

NC-40

NC-35

NC-30

NC-25

NC-20

23

SELECTION PROCESS

Fan Performance Chart

Example 1 :

The following are the design requirements for A5DB250H2 unit:

Model: A5DB250H2

Supply Air Quantity = 9000 CFM
External Static Pressure = 350 Pa

Step 1: From the fan curve (at 9000 CFM),

Standard operating system;

Total Static Pressure = 410 Pa
Internal Static Pressure, ISP = 110 Pa
External Static Pressure, ESP = 300 Pa

External Static Pressure of 300 Pa did not fulfil the design requirements.

Step 2: Therefore at 9000 CFM and 350 Pa external static pressure,

Total Static Pressure = ISP + ESP Pa

= 140 + 350 Pa
= 490 Pa

Step 3: From the fan curve, the design requirement calls for RPM about 810, whereas the unit can only deliver

RPM about 715 under the same CFM. Therefore, it is necessary to RPM about 810 under the same CFM.
Therefore, it is necessary to resize the pulley sizes.

From the table:

Motor pulley = 90 mm
Blower pulley = 200 mm
Motor RPM = 1440

In order to obtain 810 RPM, we recalculate the new blower pulley as:
(while maintaining the motor pulley)

)018/0441( x 09 = bD

mm 0.061 =

The nearest pulley size will be a diameter of 160mm

Recheck, with Db = 160mm

Blower pulley = 1440 x (90/160)

= 810

We thus need to change the blower pulley from 200mm to 160mm in order to obtain the higher operating

static pressure.

Step 4: When the pulley is changed, the V-belt length must be rechecked. We have for horizontal air throw

con guration:

V-belt length, L = 2C + 1.57 (Db + Dm) + (Db - Dm)2 / 4C

99.1 + )09 + 061( 75.1 + )516 x 2( =

mm94.4261 =

We thus can use a belt with a length of 1637mm

where, C = distance between the centres of the two pulleys
Db = diameter of blower pulley
Dm = diameter of motor pulley

Step 5: From the fan curve, we can also notice that the motor power input has increased, which is now higher than

the standard 4.0 kW. At the new operating point, the power is approximately 4.2 kW.

Thus, the existing motor is not sufficient to drive the blower with the smaller 180mm pulley.

Summary:

i) Fan motor kW = 5.5 kW
ii) Blower pulley diameter = 160 mm
iii) V-belt size = 1637 mm

24

The following table summarizes the pulley data, motor size used for the A5DB-H series, as manufactured:

Model

A5DB125H 265 240 1.5 1500

A5DB150H 265 260 1.5 1500

A5DB200H2 360 325 3.0 1420

A5DB250H2 620 615 4.0 1440

A5DB300H2/H3 635 610 4.0 1440

A5DB350H3 870 850 5.5 1440

A5DB400H4 805 750 5.5 1440

A5DB450H3 795 745 7.5 1440

A5DB500H4 770 725 11.0 1460

A5DB600H4 515 335 11.0 1460

A5DB750H5 510 330 15.0 1460

Model

A5DB125H SPZ 85 / 1210 SPZ 180 / 1610 SPZ 900 1060

A5DB150H SPZ 71 / 1108 SPZ 140 / 1610 SPZ 800 962

A5DB200H2 SPZ 75 / 1210 SPZ 2 140 / 1610 SPZ 1010 1060

A5DB250H2 SPZ 2 90 / 1610 SPZ 2 180 / 2012 SPZ 1700 1700

A5DB300H2/H3 SPZ 2 95 / 1610 SPZ 2 180 / 2012 SPZ 1650 1700

A5DB350H3 SPZ 2 85 / 1610 SPZ 2 150 / 2012 SPZ 2060 2120

A5DB400H4 SPA 2 100 / 1610 SPA 2 250 / 2517 SPA 2060 2160

A5DB450H3 SPA 2 112 / 1610 SPA 2 250 / 2517 SPA 2060 2160

A5DB500H4 SPA 3 125 / 2012 SPA 3 250 / 2517 SPA 2032 2132

A5DB600H4 SPA 3 125 / 2012 SPA 3 400 / 3020 SPA 1532 1850

A5DB750H5 SPA 3 132 / 2012 SPA 3 400 / 3020 SPA 1500 1850

Pulley Centre Distance, C

Horizontal (mm) Vertical (mm)

Motor Pulley, Dm Blower Pulley, Db V-Belt

Type

Diameter

(mm)

Type

Motor

(kW)

Diameter

(mm)

Motor

Type

RPM

Length (mm)

Horizontal Vertical

25

Example 1:

A5DB250H2 Blower Curve

800

700

4.0 kW

5.5 kW

RPM

900

600

Selected

500

490

3.0 kW

Point

800

Standard

Point

400

700

Total Static Pressure (Pa)

300

200

100

0

6000 6500 7000 7500 8000 8500 9000

2830

3100

3300

3700

600

Internal Static
Pressure with

filter

Internal Static
Pressure w/o

filter

4100

Air Flow

9000

4250

CFM

L/s

26

FAN PERFORMANCE CURVE

760

900

1320

1040

1180

SUPER HIGH

140

LOW

120

100

A5DB80H (with filter)

MEDIUM

SUPER HIGH

HIGH

27

80

External Static Pressure (Pa)

60

40

1000 1200 1400 1600 1800 2000 2200 2400 2600 2800
470

620

CFM

L/s

Air Flow