1. TECHNICAL TRAINING
2007

2. SELECTION SOFTWARE

3. Sample of Installation

4. These item will influence the piping layout and length of the design
Unit & Piping Selection
Main Factors to consider during Piping Selection
Location of equipment
Indoor Unit
Outdoor Unit
Refnet & Distributor Joint
These item will influence the piping layout and length of the design

5. Unit & Piping Selection
Some other factors to consider during Piping Selection
Equivalent Piping Length
Type of Joint for branches
Outdoor capacity factor
Piping length & height factor
Refrigerant Pipe Specification

6. Equivalent Piping Calculation
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

7. Restriction of Piping Length

8. Important Factor to Consider
Example:
Outdoor Model : MDS100BR
Pipe Diameter : mm
Main Pipe : 80m
Branch Length: 20m
Elbows: 10 units
Oil 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
= ( ) + (10 X 0.5) + (3 X 3.7) = m

9. Important Factor to Consider
Criteria 1
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).
Criteria 2
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 equivalent length of the branch

10. Important Factor to Consider
Example:
Maximum allow actual length for 10Hp is 125m
Calculated Equivalent Length is 116.1m
Ratio 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.

11. Unit & Piping Selection
Refrigerant Copper Pipe Specification : MDS-B

12. Important Factor to Consider
Example:
Hence the gas Pipe of MDS100BR need to change from 28.6 mm to mm
After expanded the gas pipe to a larger diameter, the equivalent length need to be recalculate.
Expanded Equivalent Length
= Equivalent length of main piping X equivalent length of the branch
Main Pipe : 80m
Branch Length: 20m
Elbows: 10 units
Oil 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
= ( ) + (10 X 0.5) + (3 X 3.7) = m
Expanded Equivalent Length = [80 + (10 X 0.5) + (3 X 3.7)] X
Expanded Equivalent Length = m

13. Unit & Piping Selection
Type of Joint for branches
Influence the piping layout design
Outdoor capacity factor
Influence by the design ambient temperature and indoor temperature
Piping length & height factor
Influence by the location of outdoor and the total piping length
Refrigerant Pipe Specification
Use to determine the branches diameter

14. Unit & Piping Selection
Selection of branch joint / distributors for MDS

15. Unit & Piping Selection
MDS-Y1~Y4 dimensional drawing

16. Unit & Piping Selection
MDS-Y6 dimensional drawing

17. Unit & Piping Selection
MDS-Y7 dimensional drawing

18. Unit & Piping Selection
MDS-C1 dimensional drawing

19. Unit & Piping Selection
MDS-C2~C3 dimensional drawing

20. Using Distribution Header may lead to imbalance refrigerant flow.
Unit & Piping Selection
Caution
Using Distribution Header may lead to imbalance refrigerant flow.

21. Allow Unit & Piping Selection
Connection Type of Refnet Joint/Distributors
Allow
Refnet Joint

22. Allow Unit & Piping Selection
Connection Type of Refnet Joint/Distributor
Allow
Distributor

23. Allow Unit & Piping Selection
Connection Type of Refnet Joint/Distributors
Allow
Refnet Joint
Distributor

24. Not Allow Unit & Piping Selection
Connection Type of Refnet Joint/Distributors
Not Allow
Refnet Joint
Distributor

25. Unit & Piping Selection
Cooling Capacity Correction Factor

26. Unit & Piping Selection
Heating Capacity Correction Factor

27. Unit & Piping Selection
Cooling Capacity Correction Factor
Cooling cap. factor

28. Unit & Piping Selection
Heating Capacity Correction Factor

29. Unit & Piping Selection
Refrigerant Pipe Specification : MDS-A

30. Unit & Piping Selection
Refrigerant Pipe Specification : MDS-B

31. Unit & Piping Selection
Example C A B D E F
Building Type: Bungalow

32. Unit & Piping Selection
Example
Requirement
Cooling only model
Ambient temperature : 40.0 °C
Indoor temperature : 21.0 °C
Other Information
Piping length：70m
Height between I/O：4m
Outdoor Unit located below indoors

33. Unit & Piping Selection
Indoor Requirement

34. Unit & Piping Selection
Example
Total Indoor capacity is 32.3 kW

35. Unit & Piping Selection
Example
Selection Criteria
Total Indoor capacity must be range between 50% ~ 120% of the outdoor capacity.
We recommend that the outdoor capacity equals to the total indoor capacity or a little larger than the indoor capacity

36. Unit & Piping Selection
Example
Selected Outdoor : MDS120B
Cooling Capacity : 32.5kW
Comply to selection criteria

37. Unit & Piping Selection
Example
Selected Outdoor and Indoor Model

38. Unit & Piping Selection
Example
Outdoor Capacity factor
Cooling only model
Ambient temperature : 40.0 °C
Indoor temperature : 22.0 °C
1.03

39. Unit & Piping Selection
Example
Piping length & height factor
Piping length：70m
Height between I/O：4m
Outdoor Unit located below indoors
91%

40. Unit & Piping Selection
Example
Total Capacity
= Outdoor Capacity X Outdoor Capacity Factor
X Piping length & height Factor
= 32.5 kW X 1.03 X 94%
= kW
Comply to requirement

41. Unit & Piping Selection
Example C A B D E F
Building Type: Bungalow

42. Unit & Piping Selection
Example
Selection pipe diameter
MDS120B A B C
WMD 20G
CCD 25C
WMD 10G
5.6 kW
2.8 kW
6.5 kW D E
CKD 30A
WMD 10G
WMD 20G
2.8 kW
9.0 kW
5.6 kW

43. Unit & Piping Selection
Refrigerant Pipe Specification : MDS-B

44. Unit & Piping Selection
Example
Downstream capacity
Point A A-B-C : 14.9 kW A-D-E : 17.4 kW Point B B-C : 8.4 kW D-E : 8.4 kW
Main pipe diameter :
ø 15.88mm / ø 28.6mm
MDS120B A B C
WMD 20G
CCD 25C
WMD 10G
5.6 kW
2.8 kW
6.5 kW D E
CKD 30A
WMD 10G
WMD 20G
2.8 kW
9.0 kW
5.6 kW

45. Unit & Piping Selection
Refrigerant Pipe Specification : MDS-B
Point A
A-B-C : 14.9 kW
A-D-E : 17.4 kW

46. Unit & Piping Selection
Example
Main pipe diameter :
ø 15.88mm / ø 28.6mm
A-B diameter :
ø 9.52mm / ø 19.05mm
MDS120B A B C
WMD 20G
CCD 25C
WMD 10G
5.6 kW
2.8 kW
6.5 kW D E
CKD 30A
WMD 10G
A-D diameter :
ø 12.7mm /
ø 25.4mm
WMD 20G
2.8 kW
9.0 kW
5.6 kW

47. Unit & Piping Selection
Example
Point B
B-C : 8.4 kW
B-CCD25C : 6.5 kW
MDS120B A B C
WMD 20G
CCD 25C
WMD 10G
5.6 kW
2.8 kW
6.5 kW D E
CKD 30A
WMD 10G
WMD 20G
2.8 kW
9.0 kW
5.6 kW

48. Unit & Piping Selection
Refrigerant Pipe Specification : MDS-B
Point B
B-C : 8.4 kW
B-CCD25C : 6.5 kW

49. Unit & Piping Selection
Example
A-B:
ø 9.52
/ ø 19.05
B-C:
ø 9.52 / ø15.88
B-CCD25C:
ø 9.52 / ø15.88
MDS120B A B C
WMD 20G
CCD 25C
WMD 10G
5.6 kW
2.8 kW
6.5 kW D E
CKD 30A
WMD 10G
WMD 20G
2.8 kW
9.0 kW
5.6 kW

50. Unit & Piping Selection
Example

51. Unit & Piping Selection
Example
Main Pipe: ø / ø 28.6
A-B: ø 9.52 / ø19.05
B-C: ø 9.52 / ø15.88
MDS120B A B C
WMD 20G
CCD 25C
WMD 10G
5.6 kW
2.8 kW
6.5 kW D E
CKD 30A
WMD 20G
5.6 kW
WMD 10G
2.8 kW
9.0 kW
A-D: ø12.7 / ø25.4
D-E: ø9.52 / ø15.88

52. Unit & Piping Selection
Example
All unit in mm
Selection of branch
A-B diameter :
ø 9.52 / ø 19.05
Main Pipe diameter :
ø / ø 28.6 A
Select the refnet joint of point A
A (liquid) : MDS-Y2
A (gas) : MDS-Y1
A-D diameter :
ø 12.7 / ø 25.4

53. Unit & Piping Selection
Example
Main Pipe: ø / ø 28.6
A-B: ø 9.52 / ø19.05
B-C:
ø 9.52 / ø15.88
MDS120B A B C
WMD 20G
CCD 25C
WMD 10G
5.6 kW
2.8 kW
6.5 kW D E
CKD 30A
WMD 10G
WMD 20G
2.8 kW
9.0 kW
5.6 kW
A-D: ø12.7 / ø25.4
D-E: ø9.52 / ø15.88

54. Unit & Piping Selection
Example
MDS120B A B C
WMD 20G
CCD 25C
WMD 10G
5.6 kW
2.8 kW
6.5 kW D E
CKD 30A
WMD 10G
WMD 20G
2.8 kW
9.0 kW
5.6 kW

55. Unit & Piping Selection
Example
Using liquid tube length to calculate required refrigerant. Add in refrigerant.
Formula:
G = ∑ Li* Gi
G : Refrigerant charge amount
Li : The each section of liquid tube length in all (m)
Gi : Charge amount per length（g/m）

56. Unit & Piping Selection
Total Piping Length
15.88mm – 10m
12.7mm – 25m
9.52mm – 21m
6.35mm – 14m
Example
ø (10m)
ø 9.52 (5m)
ø 9.52 (2m)
ø 9.52 (4m)
ø 6.35 (2m)
MDS120B
ø 6.35 (5m) A B C
WMD 20G
CCD 25C
WMD 10G
5.6 kW
2.8 kW
ø 12.7 (25m)
6.5 kW
ø 6.35 (2m) D E
ø 6.35 (5m)
ø 9.52 (5m)
CKD 30A
WMD 20G
WMD 10G
ø 9.52 (5m)
9.0 kW
5.6 kW
2.8 kW

57. Unit & Piping Selection
Example
Total Piping Length
15.88mm – 10m 12.7mm – 25m
9.52mm – 21m 6.35mm – 14m
Additional charge amount :
= ∑ Li* Gi
= (Piping Length for 15.88mm X Refrigerant Charge Amount)
+ (Piping Length for 12.7mm X Refrigerant Charge Amount)
+ (Piping Length for 9.52mm X Refrigerant Charge Amount)
+ (Piping Length for 6.35mm 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

58. Unit & Piping Selection
Electronic Expansion Valve
EXV Box

59. Unit & Piping Selection
Electronic Expansion Valve
2 units
2 units
1 unit
1 unit

60. Unit & Piping Selection

61. Software Demo

62. Thank You