AMDS Selection

AMDS SelectionAMDS Selection

Contents

• Introduction

• Selection Consideration

• Selection Process

• Software Demonstration

Introduction

Sample of Installation

Selection Consideration

Main Factors to consider during Piping SelectionMain Factors to consider during Piping Selection

• Location of equipmentLocation of equipment

• Indoor UnitIndoor Unit

• Outdoor UnitOutdoor Unit

• Refnet & Distributor JointRefnet & Distributor Joint

Unit & Piping Selection

These item will influence the piping layout and length of the design

Some other factors to consider during Piping SelectionSome other factors to consider during Piping Selection

• Equivalent Piping LengthEquivalent Piping Length

• Type of Joint for branchesType of Joint for branches

• Outdoor capacity factorOutdoor capacity factor

• Piping length & height factorPiping length & height factor

• Refrigerant Pipe SpecificationRefrigerant Pipe Specification


Equivalent length is the converted length and includes parts such as elbow, which has pressure losses in the pipe. The formula is as follow:

Equivalent length= Real length of tubing + No. of elbow × Equivalent length of each elbow + No. of oil trap ×Equivalent length of each oil trap

Equivalent Piping Calculation

Elbow Oil Trap9.52 0.18 1.30

12.70 0.20 1.5015.88 0.25 2.0019.05 0.35 2.4022.02 0.40 3.0025.40 0.45 3.4028.58 0.50 3.7031.80 0.55 4.00

Diameter of Pipe

Equivalent Length

Restriction of Piping Length

3~5 Hp 6 Hp 8~10 Hp 12~32 Hp100 125 250 350

Actual piping length 50 70 125 150Equivalent length 60 80 150 200

25 30

Outdoor above 20 30Indoor above 20 30

15

40

5040

Length (m)

Piping

Height

Maximum equivalent length from first branch to furthers unit

Maximum height between indoor unit

Maximum length of longest branch

Between further indoor and outdoor

Total equivalanet length

Important Factor to Consider

Example:Outdoor Model : MDS100BRPipe Diameter : 28.6 mmMain Pipe : 80mBranch Length: 20mElbows: 10 unitsOil traps: 3 units

Elbow Oil Trap9.52 0.18 1.30

12.70 0.20 1.5015.88 0.25 2.0019.05 0.35 2.4022.02 0.40 3.0025.40 0.45 3.4028.58 0.50 3.7031.80 0.55 4.00

Diameter of Pipe

Equivalent Length

Equivalent Length

= Real length of tubing + No. of elbow × Equivalent length of each elbow + No. of oil trap ×Equivalent length of each oil trap= (80 + 20) + (10 X 0.5) + (3 X 3.7) = 116.1 m

When the equivalent length is more than 90% of the maximal real length of the main tubing , the gas pipe need to be increase to one size bigger (diameter).

After expanded the gas pipe to a larger diameter, the equivalent length need to be recalculate. The formula is as follow:

Expanded Equivalent Length

= Equivalent length of main piping X 0.5 + equivalent length of the branch

Criteria 1

Criteria 2



3~5 Hp 6 Hp 8~10 Hp 12~30 Hp100 125 250 350

Actual piping length 50 70 125 150Equivalent length 60 80 150 200

25 30

Outdoor above 20 30Indoor above 20 30

Length (m)

Piping

Height

Maximum equivalent length from first branch to furthers unit

Maximum height between indoor unit

Maximum length of longest branch

Between further indoor and outdoor

Total equivalanet length

15

40

5040

Maximum allow actual length for 10Hp is 125mCalculated Equivalent Length is 116.1mRatio of Equivalent Length over Maximum allow Actual Length= 92.88%

Equivalent length is more than 90% of the maximal real length.Hence the gas Pipe of MDS100BR need to change.

Example:

Refrigerant Copper Pipe Specification : MDS-B


Important Factor to ConsiderExample:Hence the gas Pipe of MDS100BR need to change from 28.6 mm to 39.40 mmAfter expanded the gas pipe to a larger diameter, the equivalent length need to be recalculate.

Expanded Equivalent Length = Equivalent length of main piping X 0.5 + equivalent length of the branch

Main Pipe : 80mBranch Length: 20mElbows: 10 unitsOil traps: 3 units

Equivalent Length

= Real length of tubing + No. of elbow × Equivalent length of each elbow + No. of oil trap ×Equivalent length of each oil trap= (80 + 20) + (10 X 0.5) + (3 X 3.7) = 116.1 m

Expanded Equivalent Length = [80 + (10 X 0.5) + (3 X 3.7)] X 0.5 + 20

Expanded Equivalent Length = 68.05 m

• Type of Joint for branchesType of Joint for branches

• Influence the piping layout designInfluence the piping layout design

• Outdoor capacity factorOutdoor capacity factor

• Influence by the design ambient temperature and Influence by the design ambient temperature and indoor temperatureindoor temperature

• Piping length & height factor Piping length & height factor

• Influence by the location of outdoor and the total Influence by the location of outdoor and the total piping lengthpiping length

• Refrigerant Pipe SpecificationRefrigerant Pipe Specification

• Use to determine the branches diameterUse to determine the branches diameter


Selection of branch joint / distributors for MDS


ModelMDS-Y1MDS-Y2MDS-Y3MDS-Y4MDS-Y6MDS-Y7MDS-C1MDS-C2MDS-C3

Refnet Joint (2 Branches)

Distributors Header (4 Branches)

MDS-Y1~Y4 dimensional drawing

A B C D E

(outer diameter)

F G H I

(outer diameter)

J K L M N

(outer diameter)

O P Q R

MDS-Y1 553 172 293 120 28.6 28.9 25.7 22.5 28.6 28.9 25.7 22.5 19.3 22.2 19.3 16.1 12.9 9.7MDS-Y2 420 142 223 80 15.88 16.1 12.9 9.7 12.7 12.9 9.7 6.5 12.7 12.9 9.7 6.5MDS-Y3 420 142 223 80 15.88 16.1 12.9 9.7 12.7 12.9 9.7 6.5 15.88 16.1 12.9 9.7MDS-Y4 493 142 223 80 22.2 22.5 19.3 16.1 19.1 19.3 16.1 12.9 9.7 19.1 19.3 16.1 12.9

Diameter (mm)Refnet model

Length(mm) Diameter (mm) Diameter (mm)


MDS-Y6 dimensional drawing


MDS-Y7 dimensional drawing


MDS-C1 dimensional drawing


MDS-C2~C3 dimensional drawing


Using Distribution Header may lead to imbalance refrigerant flow.


Connection Type of Refnet Joint/Distributors

Refnet Joint

Refrigerant Pipe Work

Connection Type of Refnet Joint/Distributor

Distributor


Connection Type of Refnet Joint/Distributors

Refnet Joint Distributor


Cooling Capacity Correction Factor


Heating Capacity Correction Factor


Cooling cap. factor

Cooling Capacity Correction Factor


Heating Capacity Correction Factor


Refrigerant Pipe Specification : MDS-A


Refrigerant Pipe Specification : MDS-B


Selection Process

Example

C

A B

D

E

F

Building Type: Bungalow


RequirementRequirementCooling only modelCooling only model

• Ambient temperature : 40.0 Ambient temperature : 40.0 °C°C

• Indoor temperature : 21.0 Indoor temperature : 21.0 °C°C

Other InformationOther Information

• Piping lengthPiping length ：： 70m70m

• Height between I/OHeight between I/O ：： 4m4m

• Outdoor Unit located below indoorsOutdoor Unit located below indoors

Unit - AWall

Mounted

Unit - BWall

Mounted

Unit - CWall

Mounted

Unit - DWall

Mounted

Unit - ECeiling

Cassette

Unit - FCeiling

Concealed

2.7 2.7 5.0 5.4 8.8 6.4

Required Cooling Capacity

(kW)


Example

Indoor RequirementWall Mounted

WMD 09G WMD 10G WMD 15G WMD 20G WMD 25GBtu/h 8,500 9,600 12,300 19,100 22,200kW 2.5 2.8 3.6 5.6 6.5

Ceiling CassetteCKD 10C CKD 15C CKD 20C

Btu/h 9,600 12,300 19,100kW 2.8 3.6 5.6

Ceiling CassetteCKD 20A CKD 25A CKD 30A CKD 40A CKD 50A

Btu/h 19,100 22,200 30,700 38,200 47,800kW 5.6 6.5 9.0 11.2 14.0

Ceiling ConcealedCCD 10C CCD 15C CCD 20C CCD 25C CCD 28C

Btu/h 9,600 12,300 19,100 22,200 27,300kW 2.8 3.6 5.6 6.5 8.0

Ceiling ConcealedCCD 30C CCD 38C CCD 40C CCD 50C CCD 60C

Btu/h 30,700 34,100 38,200 47,800 56,000kW 9.0 10.0 11.2 14.0 16.4

COOLING ONLY MODEL

NOMINAL CAPACITY

COOLING ONLY MODEL

COOLING ONLY MODEL

COOLING ONLY MODEL

NOMINAL CAPACITY

COOLING ONLY MODEL

NOMINAL CAPACITY

NOMINAL CAPACITY

NOMINAL CAPACITYUnit - A Wall Mounted 2.7Unit - B Wall Mounted 2.7Unit - C Wall Mounted 5.0Unit - D Wall Mounted 5.4Unit - E Ceiling Cassette 8.8Unit - F Ceiling Concealed 6.4

Required Cooling Capacity(kW)


Example

A B C D E F

Capacity, kW 1.8 2.0 2.2 4.0 5.0 5.8

Model 10 10 20 20 30 25

HP of indoor unit 2.8 2.8 5.6 5.6 9.0 6.5

• Total Indoor capacity is 32.3 kW


Example

Selection CriteriaSelection Criteria

• Total Indoor capacity must be range between 50% ~ Total Indoor capacity must be range between 50% ~ 120% of the outdoor capacity.120% of the outdoor capacity.

• We recommend that the outdoor capacity equals to the We recommend that the outdoor capacity equals to the total indoor capacity or a little larger than the indoor total indoor capacity or a little larger than the indoor capacitycapacity


Example

Selected Outdoor Selected Outdoor : : MDS120BMDS120B

Cooling CapacityCooling Capacity : 32.5kW: 32.5kW

%38.99

%1005.323.32

%100

/

CapacityOutdoorCapacityIndoorTotal

RatioOI

Comply to selection criteria


Example• Selected Outdoor and Indoor ModelSelected Outdoor and Indoor Model

Outdoor Model MDS 120B 32.5 kW

Indoor A WMD 10G 2.8 kW

Indoor B WMD 10G 2.8 kW

Indoor C WMD 20G 5.6 kW

Indoor D WMD 20G 5.6 kW

Indoor E CKD 30A 9.0 kW

Indoor F CCD 25C 6.5 kW


ExampleOutdoor Capacity factorOutdoor Capacity factor

• Cooling only modelCooling only model

• Ambient temperature : 40.0 Ambient temperature : 40.0 °C°C

• Indoor temperature : 22.0 Indoor temperature : 22.0 °C°C1.03


ExamplePiping length & height factorPiping length & height factor

• Piping lengthPiping length ：： 70m70m

• Height between I/OHeight between I/O ：： 4m4m

• Outdoor Unit located below indoorsOutdoor Unit located below indoors

91%


Example

Total Capacity Total Capacity

• = Outdoor Capacity X Outdoor Capacity Factor = Outdoor Capacity X Outdoor Capacity Factor

• X Piping length & height FactorX Piping length & height Factor

• = 32.5 kW X 1.03 X 94%= 32.5 kW X 1.03 X 94%

• = 31.47 kW= 31.47 kW

Unit - A Wall Mounted 2.7Unit - B Wall Mounted 2.7Unit - C Wall Mounted 5.0Unit - D Wall Mounted 5.4Unit - E Ceiling Cassette 8.8Unit - F Ceiling Concealed 6.4Total Required Capacity 31.0

Required Cooling Capacity(kW)

Comply to requirement


Example

C

A B

D

E

F


Building Type: Bungalow

Example 1.1. Selection pipe diameterSelection pipe diameter

A B C

D E

MDS120B

CCD 25C WMD 20G WMD 10G

WMD 20GCKD 30A WMD 10G

6.5 kW5.6 kW 2.8 kW

5.6 kW9.0 kW

2.8 kW


Refrigerant Pipe Specification : MDS-B


Example

A B C

D E

MDS120B



6.5 kW5.6 kW 2.8 kW

5.6 kW9.0 kW

2.8 kW

Main pipeMain pipe diameter : diameter : ø ø 15.8815.88mm / ø mm / ø 28.628.6mmmm

Downstream capacityDownstream capacity

Point APoint A A-B-C : 14.9 kWA-B-C : 14.9 kWA-D-E : 17.4 kW A-D-E : 17.4 kW

Point BPoint B B-C : 8.4 kWB-C : 8.4 kWD-E : 8.4 kWD-E : 8.4 kW


Refrigerant Pipe Specification : MDS-B Point APoint A A-B-C : 14.9 kWA-B-C : 14.9 kW A-D-E : 17.4 kWA-D-E : 17.4 kW


Example

A B C

D E

MDS120B



6.5 kW5.6 kW 2.8 kW

5.6 kW9.0 kW

2.8 kW

Main pipeMain pipe diameter : diameter : ø ø 15.8815.88mm / ø mm / ø 28.6028.60mmmm

A-D diameter : ø 12.70mm / ø 22.23mm

A-B diameter : A-B diameter : ø ø 9.529.52mm / ø mm / ø 19.0519.05mmmm


Example

A B C

D E

MDS120B



6.5 kW5.6 kW 2.8 kW

5.6 kW9.0 kW

2.8 kW

Point BPoint BB-C : 8.4 kWB-C : 8.4 kWB-CCD25C : 6.5 kWB-CCD25C : 6.5 kW


Refrigerant Pipe Specification : MDS-B Point BPoint B B-C : 8.4 kWB-C : 8.4 kW B-CCD25C : 6.5 kW (follow indoor pipe size)B-CCD25C : 6.5 kW (follow indoor pipe size)


Example

A B C

D E

MDS120B



6.5 kW5.6 kW 2.8 kW

5.6 kW9.0 kW

2.8 kW

A-B: A-B: ø ø 9.529.52

/ ø / ø 19.0519.05

B-CCD25C: B-CCD25C: ø 9.52 / ø1ø 9.52 / ø15.885.88

B-C: B-C: ø 9.52 / ø1ø 9.52 / ø15.885.88


Example

Inlet Outlet Inlet OutletTo B & C 14.90 9.52 19.05To D & E 17.40 12.70 22.23To CCD25C 6.50 9.52 15.88To C 8.40 9.52 15.88To WM D20G 5.60 6.35 15.88To WM D10G 2.80 6.35 9.52To CKD30A 9.00 9.52 15.88To E 8.40 9.52 15.88To WM D20G 5.60 6.35 15.88To WM D10G 2.80 6.35 9.52

15.88

28.60

19.05

15.88

Point E

15.88

9.52

9.52

12.70

9.52

Point A

Point B

Point C

Point D 22.23

Liquid pipe (ø, mm) Gas pipe (ø, mm)Location

Capacity (kW)

Branch


Example

A B C

D E

MDS120B



6.5 kW5.6 kW 2.8 kW

5.6 kW

9.0 kW

2.8 kW

Main Pipe: ø Main Pipe: ø 15.8815.88 / ø / ø 28.628.6

B-C: ø 9.52 / ø1B-C: ø 9.52 / ø15.885.88

A-B: ø 9.52 / ø1A-B: ø 9.52 / ø19.059.05

A-D: ø12.7 / ø22.23A-D: ø12.7 / ø22.23 D-E: ø9.52 / ø1D-E: ø9.52 / ø15.885.88


Example Selection of branchSelection of branch

Select the refnet joint of point ASelect the refnet joint of point A

A (liquid) A (liquid) : MDS-: MDS-Y2Y2

A (gas) A (gas) : MDS-: MDS-Y1Y1

A B C D E

(outer diameter)

F G H I

(outer diameter)

J K L M N

(outer diameter)

O P Q R

MDS-Y1 553 172 293 120 28.6 28.9 25.7 22.5 28.6 28.9 25.7 22.5 19.3 22.2 19.3 16.1 12.9 9.7MDS-Y2 420 142 223 80 15.88 16.1 12.9 9.7 12.7 12.9 9.7 6.5 12.7 12.9 9.7 6.5MDS-Y3 420 142 223 80 15.88 16.1 12.9 9.7 12.7 12.9 9.7 6.5 15.88 16.1 12.9 9.7MDS-Y4 493 142 223 80 22.2 22.5 19.3 16.1 19.1 19.3 16.1 12.9 9.7 19.1 19.3 16.1 12.9

Diameter (mm)Refnet model

Length(mm) Diameter (mm) Diameter (mm)

A-D diameter : A-D diameter : ø 12.70 / ø 22.23ø 12.70 / ø 22.23

A-B diameter : A-B diameter : ø 9.52 / ø 19.05ø 9.52 / ø 19.05

All unit in mm

AA

Main Pipe diameter : Main Pipe diameter : ø 15.88 / ø 28.60ø 15.88 / ø 28.60


Example

A B C

D E

MDS120B



6.5 kW5.6 kW 2.8 kW

5.6 kW9.0 kW2.8 kW

Main Pipe: ø Main Pipe: ø 15.8815.88 / ø / ø 28.628.6

B-C: B-C: ø 9.52 / ø1ø 9.52 / ø15.885.88

A-B: ø 9.52 / ø1A-B: ø 9.52 / ø19.059.05

A-D: ø12.7 / ø22.23A-D: ø12.7 / ø22.23 D-E: ø9.52 / ø1D-E: ø9.52 / ø15.885.88

Liquid GasWMD 10G 6.35 9.52WMD 20G 6.35 15.88CCD 25C 9.52 15.88CKD 30A 9.52 15.88

ModelIndoor Valve Size (Ø, mm)


Example

A B C

D E

MDS120B



6.5 kW5.6 kW 2.8 kW

5.6 kW9.0 kW

2.8 kW

Liquid GasTo B & CTo D & ETo CCD25CTo CTo WMD20GTo WMD10GTo CKD30ATo ETo WMD20GTo WMD10G

MDS-Y2 MDS-Y3

MDS-Y2 MDS-Y1

MDS-Y2 MDS-Y4

Refnet Joint

MDS-Y2 MDS-Y4

MDS-Y2 MDS-Y3

Point E

Point A

Point B

Point C

Point D

Location Branch


Example

Formula:

G = ∑ Li* Gi

Using liquid tube length to calculate required refrigerant. Add in refrigerant.

G : Refrigerant charge amountLi : The each section of liquid tube length in all (m)Gi : Charge amount per length （ g/m）


Example

A B C

D E

MDS120B


WMD 20GCKD 30A

WMD 10G

6.5 kW5.6 kW 2.8 kW

5.6 kW9.0 kW 2.8 kW

ø ø 15.88 (10m)15.88 (10m)

ø ø 9.52 (5m)9.52 (5m)

ø ø 9.52 (2m)9.52 (2m)

ø ø 9.52 (4m)9.52 (4m)ø ø 6.35 (2m)6.35 (2m)

ø ø 6.35 (5m)6.35 (5m)

ø ø 6.35 (5m)6.35 (5m)

ø ø 6.35 (2m)6.35 (2m)

ø ø 9.52 (5m)9.52 (5m)

ø ø 9.52 (5m)9.52 (5m)

ø ø 12.7 (25m)12.7 (25m)

Total Piping Length15.88mm – 10m12.7mm – 25m9.52mm – 21m6.35mm – 14m


Example

Additional charge amount :

= ∑ Li* Gi

= (Piping Length for 15.88mm X Refrigerant Charge Amount)

+ (Piping Length for 12.7mm X Refrigerant Charge Amount)



= (10 X 180) + (25 x 120) + (21 x 80) + (14 x 50)

= 7180 g

Liquid tube diameter (mm) 6.35 9.52 12.7 15.88

Refrigerant charge amount (g/m)

50 80 120 180

Total Piping Length15.88mm – 10m 12.7mm – 25m9.52mm – 21m 6.35mm – 14m


EXV BoxEXV BoxEXV BoxEXV Box

Electronic Expansion Valve


Indoor Unit EXV Box ModelCCD 10/15CKD 10/15WMD 10/15 MEX-16-2SAP-B

CCD 20CKD 20CED20WMD 20 MEX-20-2SAP-BCCD 25CKD 25

CED 25/28WMD 25 MEX-20-3SAP-B

CKD 30/40/50CCD 30/40/50/60

CED 40/50/62

MEX-16-2SAP-A

MEX-20-3SAP-A

MEX-20-2SAP-A

MEX-25-3SAP-A

Electronic Expansion Valve

2 units

1 unit

1 unit

2 units


Software Demonstration

The End The End

AMDS Selection

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