1 © 2007 Air-conditioning Academy All rights reserved LATS – Multi V LG Air LG Air- conditioning Academy conditioning Academy
Jan 02, 2016
1© 2007 Air-conditioning Academy All rights reserved
LATS – Multi V
LG AirLG Air--conditioning Academyconditioning Academy
2© 2007 Air-conditioning Academy All rights reserved
Contents
1. Multi-V Plus model selection by product data book method (Manual Calculation)
1) Model Selection Process
2) Indoor Units Selection
3) Outdoor Units Selection
4) Calculate Performance Data
5) System Check
2. Multi V Plus model selection by LATS Multi V software (Without CAD)
1) Program Installation guide
2) User guide
3. Multi V Plus model selection by LATS Multi V software (With CAD)
1) User guide
3© 2007 Air-conditioning Academy All rights reserved
Basic raw data for
model selection•Total Load
(sensible & latent load)
•Air volume (CFM)
System selection •Indoor units
•Outdoor units
•Capacity coefficient factor
Branch selection •Y-branch
•Header branch
Control wiring
selection •Method
•Devices
Electrical wiring •Field wiring
•characteristics
Model selection process
4© 2007 Air-conditioning Academy All rights reserved
Load conditions
Outdoor 7℃DB/6℃WBOutdoor 35℃/24℃WB
Indoor 20℃ DB /15 ℃WBIndoor 26℃DB/18℃WB
HeatingCooling
Design
Conditions
Load calculation data (cooling and heating)
•Refrigerant piping
•Outdoor unit is above indoor
Load (kW)Room No.
1.9Room 7
7.5Room 6
6.2Room 5
2.4Room 4
1.9Room 3
3.6Room 2
4.9Room 1
Value assumed for
showing mathematical
calculation involved in
manual method
Calculate room load
with the help of LATS
load calculation
software or manually
5© 2007 Air-conditioning Academy All rights reserved
Proposed system diagram (assumed data)
40m
10m 10m 7m
7m7m
5m
7m
10m
10m
18m
7m
7m
Room 1Room 2
Room 3
Room 4
Room 5
Room 6
Room 7
Maximum elevation between
O/D and I/D 1, 2 and 3 = 20m
O/D and I/D 4, 5, 6 and 7 = 30m
Total piping length = 145m
Farthest piping length = 70m
6© 2007 Air-conditioning Academy All rights reserved
Indoor unit selection
Outdoor unit selection
Actual capacity of O/D
at combination ratio
Corrected capacities
calculations (O/D & I/D)
Matching of Capacities
(indoor/outdoor)
•Design parameters values
•Total and sensible capacities
•Indoor capacity index
• Indoor unit type
•Design parameters values
•Total capacity value
•Outdoor capacity index
Combination ratio
Defrosting factor
For heating mode
Heating calculations
•Total indoor capacities index
•Standard outdoor capacity index (at 100%)
•Calculation at 100%
•Outdoor performance data
•Interpolation & calculation
•Correction factor charts
•Total piping length & elevation
•Individual piping length & elevation
NO Yes
•Refer Product Data
book defrost charts
Elevation & total piping
length correction factor
Indoor unit selection
7© 2007 Air-conditioning Academy All rights reserved
�Consider indoor unit having higher rated capacity
(at specified condition) than cooling/heating
capacity required for the corresponding room
• Refer product data book indoor unit specifications
(as shown on the next page).
• Design condition : Indoor 26℃DB/18℃WB & Outdoor 35℃DB/27℃WB
Total (kW) Sensible (kW) Total(kW) Sensible (kW)
Room 1 4.9 2.94 5 3.8 76.00% 18
Room 2 3.6 2.16 5 3.8 76.00% 18
Room 3 1.9 1.14 2 1.5 75.00% 7
Room 4 2.4 1.44 2.4 1.8 75.00% 9
Room 5 6.2 3.72 6.6 5 75.76% 24
Room 6 7.5 4.5 7.7 6 77.92% 28
Room 7 1.9 1.14 2 1.5 75.00% 7
Total 28.4 17.04 30.7 23.4 111
Capacity index
(Qidu_index)Location
Cooling Load Unit CoolingSH Factor
Cooling load requirement from manual
calculation or LATS-load software
•Refer to the same capacity
table for checking the capacity
index at that conditions.
Total capacity
index = 111
(∑Qidu_index)
Indoor unit selection
8© 2007 Air-conditioning Academy All rights reserved
TC=5.0
SHC=3.8
TC=3.3
SHC=2.5
Capacity index
Qidu_index = 12
Capacity index
Qidu_index = 18
• At Indoor 26℃DB/18℃WB &Outdoor 35℃• Product data book page no. 270 (R-22)
Capacity index, total cooling (TC) &
Sensible heat cooling (SHC) can be
checked for each model from PD book
like mentioned
Indoor unit selection
9© 2007 Air-conditioning Academy All rights reserved
Indoor unit selection
Outdoor unit selection
Actual capacity of O/D
at combination ratio
Corrected capacities
calculations (O/D & I/D)
Matching of Capacities
(indoor/outdoor)
•Design parameters values
•Total and sensible capacities
•Indoor capacity index
• Indoor unit type
•Design parameters values
•Total capacity value
•Outdoor capacity index
Combination ratio
Defrosting factor
For heating mode
Heating calculations
•Total indoor capacities index
•Standard outdoor capacity index (at 100%)
•Calculation at 100%
•Outdoor performance data
•Interpolation & calculation
•Correction factor charts
•Total piping length & elevation
•Individual piping length & elevation
NO Yes
•Refer Product Data
book defrost charts
Elevation & total piping
length correction factor
Outdoor unit selection
10© 2007 Air-conditioning Academy All rights reserved
We have already checked that the sum of total I/D unit capacity index is (∑Qidu_index) =111. So the selected outdoor unit should be such that ∑Qidu_index lie in between it 100% to 130% capacity index. Start matching capacity index with lower capacity O/D unit first. The values in the table are {Qodu_index}.
If this outdoor unit capacity does not satisfy the final total corrected capacities
of indoor unit then we can choose the next higher capacity outdoor unit.
111 lies between 110% and
120% combination capacity of
10 hp outdoor unit.
Outdoor unit selection
We have already checked that the sum of total I/D unit capacity index is
(∑Qidu_index) =111. So the selected outdoor unit should be such that
∑Qidu_index lie in between it 100% to 130% capacity index. Start matching
capacity index with lower capacity O/D unit first. The values in the table are
{Qodu_index}.
If this outdoor unit capacity does not satisfy the final total corrected capacities of
indoor unit then we can choose the next higher capacity outdoor unit.
11© 2007 Air-conditioning Academy All rights reserved
Indoor unit selection
Outdoor unit selection
Actual capacity of O/D
at combination ratio
Corrected capacities
calculations (O/D & I/D
Matching of Capacities
(indoor/outdoor)
•Design parameters values
•Total and sensible capacities
•Indoor capacity index
• Indoor unit type
•Design parameters values
•Total capacity value
•Outdoor capacity index
Combination ratio
Defrosting factor
For heating mode
Heating calculations
•Total indoor capacities index
•Standard outdoor capacity index (at 100%)
•Calculation at 100%
•Outdoor performance data
•Interpolation & calculation
•Correction factor charts
•Total piping length & elevation
•Individual piping length & elevation
NO Yes
•Refer Product Data
book defrost charts
Elevation & total piping
length correction factor
Combination ratio
12© 2007 Air-conditioning Academy All rights reserved
12596481610hp
Maximum index (at
130% connected
capacity)
Index at standard rating
(at 100% connected
capacity)
Minimum index (at
50% connected
capacity)
Capacity index range (Qodu_index)Maximum No.
of
connectable
indoor units
Model
s
• Actual number of connected indoor units are 7 (less than maximum number 16).
• The values in the above table at 100% capacity will be used to calculate
combination ratio.
• Rcombi = ∑Qidu_index / Qodu_index {Calculated at 100% outdoor unit capacity index}
Total indoor units
capacity index
∑Qidu_index
Models
111/96 = 115.625%9611110hp
Combination ratio
Rcombi = ∑Qidu_index / Qodu_index
Index at standard
rating (100%)
(Qodu_index)
Combination ratio helps in calculating actual capacities of outdoor/indoor units.
Combination ratio
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Indoor unit selection
Outdoor unit selection
Actual capacity of O/D
at combination ratio
Corrected capacities
calculations (O/D & I/D)
Matching of Capacities
(indoor/outdoor)
•Design parameters values
•Total and sensible capacities
•Indoor capacity index
• Indoor unit type
•Design parameters values
•Total capacity value
•Outdoor capacity index
Combination ratio
Defrosting factor
For heating mode
Heating calculations
•Total indoor capacities index
•Standard outdoor capacity index (at 100%)
•Calculation at 100%
•Outdoor performance data
•Interpolation & calculation
•Correction factor charts
•Total piping length & elevation
•Individual piping length & elevation
NO Yes
•Refer Product Data
book defrost charts
Elevation & total piping
length correction factor
Actual capacity of O/D at combination ratio
14© 2007 Air-conditioning Academy All rights reserved
TC=29.8
PI=9.54
Capacity index
Qodu_index = 106(at 110%)
Capacity index
Qodu_index = 115(at 120%)
TC=28.9
PI=9.30
The table below tell about the actual capacities and power
input by the outdoor unit at specific indoor unit
combination. (10hp)
Actual capacity of O/D at combination ratio
15© 2007 Air-conditioning Academy All rights reserved
• Now using interpolation method the actual capacity of outdoor unit at the
combination ratios can be calculated.
• Qodu(Ti,To, Rcombi) is a function of indoor, outdoor temperature and combination ratio.
Important note : (e) & (f) are calculated on interpolation method such as
For ex. � Index at combination ratio (10hp) = 106 + [(115.625-110)*(115-106)]/(120-110) = 111.06
� Actual capacity (10hp) = 28.9 + [(115.625-110)*(29.8-28.9)] / (120-110) = 29.4 (at 115.625%)
(f)(e)(d)(c)(b)(a)
Outdoor Index
at combination
ratio
Combination
ratio
Rcombi =
∑Qidu_index / Qodu_index
111.06
Qodu_index
28.9110106
29.8115
Indoor
Combinatio
n (%)
115.625%
Total
coolingModel
29.4(115.625%)120
10hp
Actual capacity
Qodu(Ti,To,Rcombi) (kW)
Actual capacity of O/D at combination ratio
16© 2007 Air-conditioning Academy All rights reserved
Indoor unit selection
Outdoor unit selection
Actual capacity of O/D
at combination ratio
Corrected capacities
calculations (O/D & I/D)
Matching of Capacities
(indoor/outdoor)
•Design parameters values
•Total and sensible capacities
•Indoor capacity index
• Indoor unit type
•Design parameters values
•Total capacity value
•Outdoor capacity index
Combination ratio
Defrosting factor
For heating mode
Heating calculations
•Total indoor capacities index
•Standard outdoor capacity index (at 100%)
•Calculation at 100%
•Outdoor performance data
•Interpolation & calculation
•Correction factor charts
•Total piping length & elevation
•Individual piping length & elevation
NO Yes
•Refer Product Data
book defrost charts
Elevation & total piping
length correction factor
Corrected capacities calculations (O/D & I/D)
17© 2007 Air-conditioning Academy All rights reserved
• Till here
• ∑Qidu_index = 111
•Qodu_index = 96 (100%)
• Rcombi = ∑Qidu_index / Qodu_index = 115.625
• Qodu(Ti,To,Rcombi) = 29.4kW
•Indoor unit Corrected capacity is calculated individually.
• Qidu_corrected = [Qidu_index / ∑Qidu_index]×Qodu(Ti,To,Rcombi)
Corrected outdoor unit capacity = 29.4kW I/D unit 1 actual = ( 18 / 111 ) × 29.4 =
4.77
Actual
capacity (kW)
Sensible
heat (kW)
5.00 3.80
5.00 3.80
2.00 9.00
2.40 1.80
6.60 5.00
7.70 6.00
2.00 1.50
30.70 30.90
Capacity
Index
Correted
capacity(kW)
18 4.77
18 4.77
7 1.85
9 2.38
24 6.36
28 7.42
7 1.85
111 29.40
Corrected
sensible heat (kW)
3.62
3.62
1.39
1.79
4.83
5.86
1.39
22.51
Room No.
Room 1
Room 2
Room 3
Room 4
Room 5
Room 6
Room 7
Corrected capacities calculations (I/D)
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Indoor unit selection
Outdoor unit selection
Actual capacity of O/D
at combination ratio
Corrected capacities
calculations (O/D & I/D
Matching of Capacities
(indoor/outdoor)
•Design parameters values
•Total and sensible capacities
•Indoor capacity index
• Indoor unit type
•Design parameters values
•Total capacity value
•Outdoor capacity index
Combination ratio
Defrosting factor
For heating mode
Heating calculations
•Total indoor capacities index
•Standard outdoor capacity index (at 100%)
•Calculation at 100%
•Outdoor performance data
•Interpolation & calculation
•Correction factor charts
•Total piping length & elevation
•Individual piping length & elevation
NO Yes
•Refer Product Data
book defrost charts
Elevation & total piping
length correction factor
Elevation & total piping length correction factor
19© 2007 Air-conditioning Academy All rights reserved
For the indoor unit 1, 2 and 3
Level difference = 20m.
Equivalent lengths are 57m, 67m and
67m correspondingly
Outdoor unit is above indoor units
From the above chart the elevation & total piping length
correction factor {f(length, elevation)} for for indoor unit 1, 2 and 3 are
0.935, 0.922 and 0.922 correspondingly
2 and 31
Elevation & total piping length correction factor
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For the indoor unit 4, 5, 6 and 7
Level difference = 30m.
Equivalent lengths are 62m, 62m, 70m
and 62m correspondingly
Outdoor unit is above indoor units
From the above chart the elevation & total piping length correction factor {f(length, elevation)}
for for indoor units 4, 5, 6 and 7 are 0.925, 0.925, 0.918 and 0.925 correspondingly
4, 5 and 7 6
Elevation & total piping length correction factor
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•Final indoor unit capacity is calculated by the given formula.
• Qodu_final =Qidu_corrected×f(length, elevation)
Final capacities (indoor unit)
Correted
capacity(kW)
Corrected sensible heat
(kW)
4.77 3.62
4.77 3.62
1.85 1.39
2.38 1.79
6.36 4.83
7.42 5.78
1.85 1.39
29.40 22.43
Length and elevation
correction factor
0.935
0.922
0.922
0.925
0.925
0.918
0.925
Final indoor unit
capacity (kW)
4.46
4.40
1.71
2.21
5.88
6.81
1.72
27.17
Final sensible
heat (kW)
3.39
3.34
1.28
1.65
4.47
5.31
1.29
20.73
22© 2007 Air-conditioning Academy All rights reserved
Indoor unit selection
Outdoor unit selection
Actual capacity of O/D
at combination ratio
Corrected capacities
calculations (O/D & I/D
Matching of Capacities
(indoor/outdoor)
•Design parameters values
•Total and sensible capacities
•Indoor capacity index
• Indoor unit type
•Design parameters values
•Total capacity value
•Outdoor capacity index
Combination ratio
Defrosting factor
For heating mode
Heating calculations
•Total indoor capacities index
•Standard outdoor capacity index (at 100%)
•Calculation at 100%
•Outdoor performance data
•Interpolation & calculation
•Correction factor charts
•Total piping length & elevation
•Individual piping length & elevation
NO Yes
•Refer Product Data
book defrost charts
Elevation & total piping
length correction factor
Matching capacities (indoor & outdoor unit)
23© 2007 Air-conditioning Academy All rights reserved
Room 1
Room 2
Room 3
Room 4
Room 5
Room 6
Room 7
Total
LocationTotal (kW) Sensible (kW)
4.90 2.94
3.60 2.16
1.90 1.14
2.40 1.44
6.20 3.72
7.50 4.50
1.90 1.14
28.40 17.04
Cooling load
18
18
7
9
24
28
7
111
Capacity indexTotal (kW) Sensible (kW)
4.46 3.39
4.40 3.34
1.71 1.28
2.21 1.65
5.88 4.47
6.81 5.31
1.72 1.29
27.17 20.73
Final cooling capacity
• Now each indoor unit capacity both actual and sensible is compared with the required parameters.
• Also total overall load requirements are compared with the requirement.
• If it is satisfactory then selection of units are ok but if any one indoor or outdoor unit fails in requirement we
have to go for higher capacity models.
Matching capacities (indoor & outdoor unit)
The values with arrow should be equal or more than the cooling load. but in this
case they are lower. So we will upgrade indoor units one by one and follow the
whole process again. Till we get optimal solution.
24© 2007 Air-conditioning Academy All rights reserved
• So finally after iterations optimal solution is set as above
• Outdoor unit changed to 12 hp unit from 10hp unit.
Iteration Conclusion
Ok
Ok
Ok
Ok
Comments
O/D unit
Room 7
Room 6
Room 5
Location
12hp
9k
36K
28k
Indoor unit
Ok24KRoom 1
Ok
Ok
Ok
Comments
12KRoom 4
9KRoom 3
Indoor unitLocation
Room 2 18K
Room 1
Room 2
Room 3
Room 4
Room 5
Room 6
Room 7
Total
LocationTotal (kW) Sensible (kW)
4.90 2.94
3.60 2.16
1.90 1.14
2.40 1.44
6.20 3.72
7.50 4.50
1.90 1.14
28.40 17.04
Cooling load
24
18
9
12
28
36
9
136
Capacity
Index Total (kW) Sensible (kW)
5.85 4.39
4.33 3.25
2.16 1.60
2.95 2.19
6.89 5.18
8.78 6.59
2.21 1.64
33.17 24.84
Final cooling capacity
25© 2007 Air-conditioning Academy All rights reserved
2. Multi V Plus model selection
by LATS Multi V software (Without CAD)
26© 2007 Air-conditioning Academy All rights reserved
Program Installation guide
For downloading LATS model selection software
Log on to LG global website : www.lgeaircon.com
For access to website contact to sales manager of your area
Note: Access to this site is permitted to LG employees only
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Program Installation guide
1. Click to Partner Support and new window will open
2. Click Technical Data
3. Then click Software and Software download window will open
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Program Installation guide
Select latest version of LATS-Multi V: Multi V Model Selection
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Program Installation guide
Then click to hyperlink “Download LATS-Multi V” and select folder for
downloading in your PC.
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2. Click Next (No Special Option)
1. Click on install icon
3. Click Yes for accepting downloading agreement
Program Installation guide
1. For start setup LATS Multi V click install icon
2. Click next to continue process
3. Read agreement and click “Yes” (if you don’t accept it then you can’t install
LATS)
31© 2007 Air-conditioning Academy All rights reserved
4. Input
User Name
Company Name.
Input Installation Password “latsmultiv”
5. Click Next Button .
Program Installation guide
6. Start copying files and Finish Installation.
4. Fill User Name and Company name. Input password “latsmultiv”
5. Click Next to continue install
6. Start copying files and Finish Installation
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LATS-Multi V Initial Window.
After successful installation of software the given below window will open
User Guide
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1. Project Information Menu
2. Click on Create Project 3. Create Project Window will open
4. Input Project Name
5. Select Unit system
6. Select Cooling or Heating Mode
7. Select ODU Type
8. Give any special comment (optional)
9. Click Next
Be sure to disable CAD option if you are not using CAD drawing for model selection
User Guide
1. Project Information Menu
2. Click on Create Project
3. Create Project Window will open
4. Input Project Name
5. Select Unit system
6. Select Cooling or Heating Mode
7. Select ODU Type
8. Give any special comment (optional)
9. Click Next
Be sure to disable CAD option if you are not using CAD drawing for model
selection
34© 2007 Air-conditioning Academy All rights reserved
10. Select Country and City
11. Input Design condition.
12. Click Next
Change design condition if
given values not satisfied
your requirement
If you change one of the
following air property
(DBT,WBT,RH),
psychometric process will
execute and find other
related value. So it’s easy to
define air property.
User Guide
10. Select Country and City
11. Input Design condition.
12. Click Next
Change design condition if given values not satisfied your requirement
If you change one of the following air property (DBT,WBT,RH), psychometric
process will execute and find other related value. So it’s easy to define air
property.
35© 2007 Air-conditioning Academy All rights reserved
16. If LATS LOAD values are
not available manual load
entry can also be done simply
by adding values in columns
13. This window will open.
14. When selecting Open Load, You can load the result calculated by LATS-LOAD
15. Add floor or Add space as required. For adding and
removing Floor or Space first click on the row and then
click Add or Remove
15. Click Next
User Guide
13. This window will open.
14. When selecting Open Load, You can load the result calculated by
LATS-LOAD
15. Add floor or Add space as required. For adding and removing Floor or
Space first click on the row and then click Add or Remove
16. If LATS LOAD values are not available manual load entry can also be
done simply by adding values in columns
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17. Input Customer &
contractor Information it
will be printed out while
making report.
18. After filling all data click Finish
User Guide
17. Input Customer & contractor Information it will be printed out while
making report.
18. After filling all data click Finish
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19. This window will appear
System Property Window
System Panel
Indoor Unit Toolbar
20. From here we will start selecting outdoor units, indoor
units, branch pipes and header pipes according to design
21. Double click on outdoor unit icon
for selecting outdoor unit
User Guide
19. This window will appear
20. From here we will start selecting outdoor units, indoor units, branch pipes and
header pipes according to design
21. Double click on outdoor unit icon for selecting outdoor unit
38© 2007 Air-conditioning Academy All rights reserved
Toggle navigator
View control wire
Toggle description
View reports
Space load summary
Auto piping
Delete system
Copy system
New system
System setting
System check
Save project
System validation property
System pre-view (tree only)
System panel
View power line
View pipe line
distribution
User Guide – Main tool bar
39© 2007 Air-conditioning Academy All rights reserved
Arrow
New Outdoor
New Indoor
New Room
New Pipe
New Equipment
New Climb
Delete Unit
Rotate Unit
Rotate Angle
Create Net
Undo
Redo
Zoom in
Zoom out
Zoom window
Fit window
Pan
Grid on/off
Ortho on/off
Import DWG file
Export DXF file
User Guide – Other tool bar
40© 2007 Air-conditioning Academy All rights reserved
22. This window will appear
23. Select proper unit as per
load requirement
24. In heating case select
defrost factor
25. These specifications will
change according to the product
automatically
26. After selecting above value click OK
Or you can use Auto
Selection for seeing possible
connectable O/D unit
Other optional
accessory can also be
choose by clicking
this button
User Guide
22. This window will appear
23. Select proper unit as per load requirement
24. In heating case select defrost factor
25. These specifications will change according to the product automatically
26. After selecting above value click OK
Other optional accessory can also be choose by clicking this button
Or you can use Auto Selection for seeing possible connectable O/D unit
41© 2007 Air-conditioning Academy All rights reserved
27. The new outdoor unit will appear.
No. of connected I/D units //
Maximum No. of connectable I/D
units
I/D unit capacity index // O/D unit
capacity index (combination ratio)
Total connected piping length //
Maximum total piping length
28. Double click on Stand by
User Guide
27. The new outdoor unit will appear.
28. Double click on Stand by
No. of connected I/D units // Maximum No. of connectable I/D units
I/D unit capacity index // O/D unit capacity index (combination ratio)
Total connected piping length // Maximum total piping length
42© 2007 Air-conditioning Academy All rights reserved
29. This window will appear
30. Choose one of
them
Choose Y branch for connecting 2
indoor unit or more branching
Select Header branch for connecting
more than 2 indoor unit at one
branching point
Or you can select indoor unit
User Guide
29. This window will appear
30. Choose one of them
Choose Y branch for connecting 2 indoor unit or more branching
Select Header branch for connecting more than 2 indoor unit at one branching
point or you can select indoor unit
43© 2007 Air-conditioning Academy All rights reserved
31. Choose indoor
unit (if required)32. This window will appear
33. Choose indoor unit type
34. Choose indoor unit model
35. Position of I/D w.r.t
outdoor unit
36. Select elevation from O/D
37. IDU capacities & design load will
appear automatically (Fixed)
41. Click OK
40. Select the type of accessory
38. Click Accessory (if any required)
39. This window will appear
42. Finally Click OK
User Guide - Selecting Indoor unit
31. Choose indoor unit (if required)
32. This window will appear
33. Choose indoor unit type
34. Choose indoor unit model
35. Position of indoor unit or outdoor unit
36. Select elevation from O/D
37. IDU capacities & design load will appear automatically (Fixed)
38. Click Accessory (if any required)
39. This window will appear
40. Select the type of accessory
41. Click OK
42. Finally Click OK
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45. If at stand by box Y branch is
required select Y branch
47. If Y branch is selected then
stand-by box will change
into y branch with 2 more
connected stand-by boxes.
46. And if header branch is
required select header
43. Double click on Stand by icon
44. This window will appear
48. And If header branch is
selected then stand-by box
will change into multi branch.
User Guide - If selecting Y-branch or Header branch
43. Double click on Stand by icon
44. This window will appear
45. If at stand by box Y branch is required select Y branch
46. And if header branch is required select header
47. If Y branch is selected then stand-by box will change into y branch with 2
more connected stand-by boxes.
48. And If header branch is selected then stand-by box will change into multi
branch.
45© 2007 Air-conditioning Academy All rights reserved
49. As per the design select different
Y-branches
(if needed header can also be used)
Multi V plus 10hp outdoor unit is selected
User Guide - After selecting Y-branch
Multi V plus 10hp outdoor unit is selected
49. As per the design select different Y-branches
(if needed header can also be used)
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50.Double click on Stand by for
selecting indoor unit or you can
select indoor unit by dragging
requisite indoor icon from icon
plate
51. Choose indoor unit type
52. Choose indoor unit model
54.Select elevation from
outdoor unit
55. IDU capacities & design
load will appear
automatically (Fixed value
depend on I/D)
User Guide
50.Double click on Stand by for selecting indoor unit or you can select indoor unit
by dragging requisite indoor icon from icon plate
51. Choose indoor unit type
52. Choose indoor unit model
54.Select elevation from outdoor unit
55. IDU capacities & design load will appear automatically
(Fixed value depend on I/D)
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55. Selected indoor unit
This space will show required load
User Guide
55. Selected indoor unit
This space will show required load
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After selecting indoor units at stand-by locations
Room icons (space) will appear next to each indoor
unit. Here we can select loads which are feed
manually or software calculated load.
Selected indoor type and
capacities will be seen on tree
section like this
User Guide
After selecting indoor units at stand-by locations Room icons (space) will appear
next to each indoor unit. Here we can select loads which are feed manually or
software calculated load.
Selected indoor type and capacities will be seen on tree section like this
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56. Double click on each space will
show this window
57. Select the load for each space one
by one. After double clicking on
space click value on pop-up
window which we have to assign at
that space and click OK
User Guide
56. Double click on each space will show this window
57. Select the load for each space one by one. After double clicking on space
click value on pop-up window which we have to assign at that space and click OK
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Load will be shown for each case like this
User Guide
Load will be shown for each case like this
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58. Reselect indoor unit according to the
required load (appearing under space).
Chosen indoor unit should be such that
their capacity is slightly higher than
required load
User Guide
58. Reselect indoor unit according to the required load
(appearing under space).
Chosen indoor unit should be such that their capacity is slightly higher than
required load
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59. Double click on pipe lengths for
selecting various piping lengths
between outdoor unit, Y branch and
indoor units
60. At double clicking piping length this
window will appear. Filled required
length and then click OK
User Guide
59. Double click on pipe lengths for selecting various piping lengths between
outdoor unit, Y branch and indoor units
60. At double clicking piping length this window will appear. Filled required length
and then click OK
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1
2
3
4
User Guide
Check :
1. Percentage of indoor unit capacity to required load should be more than 100%.
2. Number of connectable indoor unit should be less than maximum connected
unit
3. Combination ratio of Indoor to outdoor should be between 100% to 130%
4. Total piping length should be less than maximum allowed piping length
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61. Click auto piping button
This pop up message will appear which mean
piping is done successfully
If not warning message will appear
You can choose Y-branch manually or they
will be automatically selected while
executing Auto Piping.For choosing Y-
branch double click on Y-branch icon
User Guide
61. Click auto piping button
You can choose Y-branch manually or they will be automatically selected while
executing Auto Piping.For choosing Y-branch double click on Y-branch icon
This pop up message will appear which mean piping is done successfully
If not warning message will appear
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62. Click system check button for final system
balance check.
This pop-up message will appear that
system check was successfully
executed
If the system is not properly
balanced then a warning message
will pop-up
User Guide
62. Click system check button for final system balance check.
If the system is not properly balanced then a warning message will pop-up
This pop-up message will appear that system check was successfully executed
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So indoor unit 1,3,6,7 are short in the cooling capacity (less than 100%) as
per required loads (as shown by circles).This require increasing of indoor
unit capacity
Outdoor unit is still within the
limits of 130% capacity
Ratio of indoor unit capacity to required
load should be more than 100%
User Guide
1
3
6
7
Ratio of indoor unit capacity to required load should be more than 100%
Outdoor unit is still within the limits of 130% capacity
So indoor unit 1,3,6,7 are short in the cooling capacity (less than 100%) as per
required loads (as shown by circles).
This require increasing of indoor unit capacity
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Warning message “indoor unit capacity
exceeds the outdoor unit capacity connection
combination”
64. Click OK on the message and change the outdoor unit to higher capacity
63. After upgrading the unit by 1 or 2 steps towards
higher capacity and then repeat the following.
Click “auto piping” button and then “system check”
User Guide
63. After upgrading the unit by 1 or 2 steps towards higher capacity and then
repeat the following.
Click “auto piping” button and then “system check”
64. Click OK on the message and change the outdoor unit to higher capacity
Warning message “indoor unit capacity exceeds the outdoor unit capacity
connection combination”
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65. After upgrading outdoor unit
Click “auto piping” button and
then “system check”
66. Check for the optimal solution by again setting of indoor units till reach close to the required load
(percentage ratio close to 100% but above 100%).
User Guide
65. After upgrading outdoor unit Click “auto piping” button and then “system
check”
66. Check for the optimal solution by again setting of indoor units till reach close
to the required load
(percentage ratio close to 100% but above 100%).
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Final solution is successful.
Outdoor unit is within
limit of 130% capacity
ExampleUser Guide
Outdoor unit is within limit of 130% capacity
Final solution is successful.
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67. Next click on Schematic diagram
icon for seeing schematic view of
this drawing
User Guide
67. Next click on Schematic diagram icon for seeing schematic view of this
drawing
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clicking Schematic diagram
icon will give schematic line
view of
1. Control wire
2. Power line
3. Pipe line
Click either of these icon for seeing
control wire, power line and pipe
line 68. Next click on Generate Report for
making excel sheet of this
selection
User Guide
68. Next click on Generate Report for making excel sheet of this selection
clicking Schematic diagram icon will give schematic line view of
Control wire
Power line
Pipe line
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69. This menu will popup.
Clicking each menu will
generate the report
corresponding to that issue.
70. Finally press ok for viewing the
above choose report on excel sheet
Note: You need MS Excel program
installed on your computer for
executing this command
User Guide
69. This menu will popup.
Clicking each menu will generate the report corresponding to that issue.
70. Finally press ok for viewing the above choose report on excel sheet
Note: You need MS Excel program installed on your computer for executing this
command
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1. Proposal Sheet 2. Contact Detail Sheet 3. Table of Contents Sheet
User Guide – Final Report
1. Proposal Sheet
2. Contact Detail Sheet
3. Table of Contents Sheet
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4. Building-Load Output Sheet 5. Model Selection Summary Sheet 6. Outdoor Model Selection Sheet
User Guide - Final Report
4. Building-Load Output Sheet
5. Model Selection Summary Sheet
6. Outdoor Model Selection Sheet
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7. Indoor Model Selection Sheet 8. Model Selection Tree
User Guide – Final Report
7. Indoor Model Selection Sheet
8. Model Selection Tree
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9. Model Selection Diagram 10. Model Selection Analysis Sheet
User Guide – Final Report
9. Model Selection Diagram
10. Model Selection Analysis Sheet
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3. Multi V model selection
by LATS Multi V software (with CAD)
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1. Project Information Menu
2. Click on Create Project 3. Create Project Window will open
4. Input Project Name
5. Select Unit system
6. Select Cooling or Heating Mode
7. Select ODU Type
8. Give any special comment (optional)
10. Click Next
9. Be sure to active CADoption if you are using CAD
drawing for model selection
User Guide – Main contents
1. Project Information Menu
2. Click on Create Project
3. Create Project Window will open
4. Input Project Name
5. Select Unit system
6. Select Cooling or Heating Mode
7. Select ODU Type
8. Give any special comment (optional)
9. Be sure to active CAD option if you are using CAD drawing for model selection
10. Click Next
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11. Select Country and City
12. Input Design condition.
14. Click Next
13. Change design condition if
given values not satisfied your
requirement
If you change one of the
following air property
(DBT,WBT,RH), psychometric
process will execute and find
other related value. So it’s easy
to define air property.
User Guide
11. Select Country and City
12. Input Design condition.
13. Change design condition if given values not satisfied your requirement
If you change one of the following air property (DBT,WBT,RH), psychometric
process will execute and find other related value. So it’s easy to define air
property.
14. Click Next
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18. If LATS LOAD values are
not available manual load
entry can also be done
simply by adding values
in columns
15. This window will open.
17. Add floor or Add space as required. For
adding and removing Floor or Space first click
on the row and then click Add or Remove
19. Click Next
16. When selecting Open Load,
You can load the result
calculated by LATS-LOAD
User Guide
15. This window will open.
16. When selecting Open Load, You can load the result calculated by LATS-
LOAD
17. Add floor or Add space as required. For adding and removing Floor or Space
first click on the row and then click Add or Remove
18. If LATS LOAD values are not available manual load entry can also be done
simply by adding values in columns
19. Click Next
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20. Input Customer &
contractor Information it
will be printed out while
making report.
21. After filling all data click Finish
User Guide
20. Input Customer & contractor Information it will be printed out while making
report.
21. After filling all data click Finish
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22. This window will appear
23. Click this Icon for importing Auto CAD drawing
User Guide – Import Auto CAD drawing
22. This window will appear
23. Click this Icon for importing Auto CAD drawing
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Save Project
System Setting
New System
Copy System
Delete System
Auto piping
System Check
System Validation property
Toggle description
System load summary
View reports
System preview (Tree only)
Toggle Navigator
System Panel
Control Line
Power Cable
Pipe Line
Arrow
New Outdoor
New Indoor
New Room
New Pipe
New Equipment
New Climb
Delete Unit
Rotate Unit
Rotate Angle
Create Net
Undo
Redo
Zoom in
Zoom out
Zoom window
Fit window
Pan
Grid on/off
Ortho on/off
Import DWG file
Export DXF file
User Guide
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24. Select CAD drawing and then click Open icon
25. This will open CAD drawing with message
“CAD file is successfully open” . Click OK
on this pop-up window
User Guide
24. Select CAD drawing and then click Open icon
25. This will open CAD drawing with message “CAD file is successfully open” .
Click OK on this pop-up window
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26. Choose proper scale for opening CAD
drawing and then click OK
User Guide
26. Choose proper scale for opening CAD drawing and then click OK
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27. You can see imported CAD drawing like
this. If it is out of screen area click Fit
Window icon for resizing it
User Guide
27. You can see imported CAD drawing like this. If it is out of screen area click Fit
Window icon for resizing it
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28. Click on the New Room icon for specifying
load to different location
29. This window will open.
32. If LATS LOAD values are
not available manual load
entry can also be done
simply by adding values in
columns
30. When selecting Open Load, You can load the result calculated by LATS-LOAD
31. Add floor or Add space as required. For adding and
removing Floor or Space first click on the row and then
click Add or Remove
33. Click on any one row for
locating that row load in
drawing and then click OK
User Guide
28. Click on the New Room icon for specifying load to different location
29. This window will open.
30. When selecting Open Load, You can load the result calculated by LATS-
LOAD
31. Add floor or Add space as required. For adding and removing Floor or Space
first click on the row and then click Add or Remove
32. If LATS LOAD values are not available manual load entry can also be done
simply by adding values in columns
33. Click on any one row for locating that row load in drawing and then click OK
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34. Click your cursor on
specific location (in CAD
drawing) where you want
to locate this load.
35. Similarly choose other
location by repeating steps
from 28 to 34
User Guide
34. Click your cursor on specific location (in CAD drawing) where you want to
locate this load.
35. Similarly choose other location by repeating steps from 28 to 34
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36. Click Indoor unit
icon
37. This window will
open
41. Choose indoor unit type
42. Choose indoor unit
model
40. Click OK
38. Click Accessory (if any required)
39. Accessory window will appear
46. Finally Click OK
44. Product specific default
values
43. Choose indoor unit
elevation w.r.t the
floor
45. Software will automatically
take feed load value after
“Create “Network” command
execution.
User Guide
36. Click Indoor unit icon
37. This window will open
38. Click Accessory (if any required)
39. Accessory window will appear
40. Click OK
41. Choose indoor unit type
42. Choose indoor unit model
43. Choose indoor unit elevation w.r.t the floor
44. Product specific default values
45. Software will automatically take feed load value after “Create “Network”
command execution.
46. Finally Click OK
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47. Then click your cursor at
specific location where you
want to locate your indoor unit
48. You can see indoor unit icon
like this
49. Repeat the same steps from 36th to
48th for locating other indoor unit.
You can also use copy paste
command for locating other indoor
units.
User Guide
47. Then click your cursor at specific location where you want to locate your
indoor unit
48. You can see indoor unit icon like this
49. Repeat the same steps from 36th to 48th for locating other indoor unit.
You can also use copy paste command for locating other indoor units.
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50. Join all indoor unit center to
their corresponding room center
by using “New Pipe” command
Note: Failure to this will not
allocate design load to the
rooms while making Tree
System.
User Guide
50. Join all indoor unit center to their corresponding room center by using “New
Pipe” command
Note: Failure to this will not allocate design load to the rooms while making Tree
System.
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51. Adjust indoor unit direction by
clicking Indoor Unit and then
Rotate Angle icon (As per the
piping direction required)
52. This window will
appear
53. Fill the required rotation
angle and then click OK
Note: All rotation will take
place by considering initial
position as reference
54. You can see pipe
connecting point ( dash)
at this location of indoor
unit
User Guide
51. Adjust indoor unit direction by clicking Indoor Unit and then Rotate Angle icon
(As per the piping direction required)
52. This window will appear
53. Fill the required rotation angle and then click OK
Note: All rotation will take place by considering initial position as reference
54. You can see pipe connecting point ( dash) at this location of indoor unit
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55. Click Outdoor Unit icon
56. This window will appear
59. Select proper unit as per
indoor load requirements
60. Select defrost factor
(Heat Pump model )
61. Product specific default values
62. After selecting above value click OK
58. Auto Selection is only
possible after successful
connection of indoor
units through “Network
Create” command
57. Select optional
accessory if required .
User Guide
55. Click Outdoor Unit icon
56. This window will appear
57. Select optional accessory if required .
58. Auto Selection is only possible after successful connection of indoor units
through “Network Create” command
59. Select proper unit as per indoor load requirements
60. Select defrost factor
(Heat Pump model )
61. Product specific default values
62. After selecting above value click OK
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63. Then click your cursor at
specific location where you
want to locate your outdoor unit
64. You can see outdoor unit icon
like this
User Guide
63. Then click your cursor at specific location where you want to locate your
outdoor unit
64. You can see outdoor unit icon like this
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65. Click “New Equipment”
icon
66. This window will
appear
67. Select Y-branch or Header
when required .
User Guide
65. Click “New Equipment” icon
66. This window will appear
67. Select Y-branch or Header when required .
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68. Click your cursor at specific
location where you want to
locate your Y branch
69. You can see Y branch icon like this
70. You can further adjust Y-branch
direction by clicking Y-branch
and then Rotate Angle icon
72. Fill required rotation angle
and then click OK
Note: All rotation will take
place by considering initial
position as reference
71. This window will appear
User Guide
68. Click your cursor at specific location where you want to locate your Y branch
69. You can see Y branch icon like this
70. You can further adjust Y-branch direction by clicking Y-branch and then
Rotate Angle icon
71. This window will appear
72. Fill required rotation angle and then click OK
Note: All rotation will take place by considering initial position as reference
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73. Finally your drawing will looks
like this having icons of room
load, indoor units, outdoor unit
and Y branch/header
User Guide
73. Finally your drawing will looks like this having icons of room load, indoor
units, outdoor unit and Y branch/header
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74. Click “New Pipe”
icon
75. Then click & drag with left
button of your mouse on the
drawing and finally release this
button at indoor/ Y-branch
connecting point
76. You can see refrigerant pipes
drawn between outdoor and Y-
branch or Y-branch and I/D units .
77. Complete the piping circuit at
various points like outdoor unit, Y-
branch/ header and indoor units.
78. Note : Use Ortho On/Off option for drawing
orthogonal pipe. After drawing pipes click
mouse right button on the pipe (on white color
identifier at the middle of pipe) and drag it
slightly by pressing “Shift Key” for placing
your pipe orthogonally.
Ortho
On/Off
User Guide
74. Click “New Pipe” icon
75. Then click & drag with left button of your mouse on the drawing and finally
release this button at indoor/ Y-branch connecting point
76. You can see refrigerant pipes drawn between outdoor and Y-branch or Y-
branch and I/D units .
77. Complete the piping circuit at various points like outdoor unit, Y-branch/
header and indoor units.
78. Note : Use Ortho On/Off option for drawing orthogonal pipe. After drawing
pipes click mouse right button on the pipe (on white color identifier at the middle
of pipe) and drag it slightly by pressing “Shift Key” for placing your pipe
orthogonally.
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79. In the Floor Viewer, You can add new floor
80. Right click on Floor icon for adding,
deleting and editing floors.
81. After adding floor right click on
the same floor (Floor2 icon) and
click Edit icon.
82. This window will appear
83. Fill the floor height (Height
from the linked floor) and
then click Ok.
84. For adding CAD drawing on
the newly added floor
perform steps from 23 to 27.
User Guide
79. In the Floor Viewer, You can add new floor
80. Right click on Floor icon for adding, deleting and editing floors.
81. After adding floor right click on the same floor (Floor2 icon) and click Edit
icon.
82. This window will appear
83. Fill the floor height (Height from the linked floor) and then click Ok.
84. For adding CAD drawing on the newly added floor perform steps from 23 to
27.
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85. Click “New Climb” icon for
connecting added floor (Floor2)
to the previous floor (Floor0).
86. This window will appear
87. Select the floor to be
linked with the present
drafting floor and click
Ok.
User Guide
85. Click “New Climb” icon for connecting added floor (Floor2) to the previous
floor (Floor0).
86. This window will appear
87. Select the floor to be linked with the present drafting floor and click Ok.
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88. Click the cursor at the desired
point to locate the “climb
piping”.
89. You can see this Icon and
message showing connected
floor
User Guide
88. Click the cursor at the desired point to locate the “climb piping”.
89. You can see this Icon and message showing connected floor
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90. After adding the new floor repeat
operation from 28 to 78 for adding
Room, Indoor Units, Y-branch/Header
and Pipes on the new floor.
User Guide
90. After adding the new floor repeat operation from 28 to 78 for adding Room,
Indoor Units, Y-branch/Header and Pipes on the new floor.
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91. Click “Create Network” icon for
checking the connected network.
Error message in the System Log
Viewer
92. Error message is displayed on
the error log whenever the
connection between pipe and I/D
unit, Y-branch or O/D unit is not
proper with Error Icon located on
wrong connection
93. Remove the error before
proceeding further.
User Guide
91. Click “Create Network” icon for checking the connected network.
92. Error message is displayed on the error log whenever the connection
between pipe and I/D unit, Y-branch or O/D unit is not proper with Error Icon
located on wrong connection
93. Remove the error before proceeding further.
Error message in the System Log Viewer
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94. After removing the error , again
click Create Network icon.
95. If there is no error then “Network
Completion” message will appear
in
System Log Viewer
User Guide
94. After removing the error , again click Create Network icon.
95. If there is no error then “Network Completion” message will appear in
System Log Viewer
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96. Click Auto Piping icon
97. Auto Piping command
automatically selects Y-
branch/Header branch name,
pipe diameter and pipe length
User Guide
96. Click Auto Piping icon
97. Auto Piping command automatically selects Y-branch/Header branch name,
pipe diameter and pipe length
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98. Click System Check icon
99. On the successful execution of this
command this window will pop-up
100. If there is an error message.
Fix the error and perform
1. Create Network
2. Auto piping
3. System Check
again
User Guide
98. Click System Check icon
99. On the successful execution of this command this window will pop-up
100. If there is an error message. Fix the error and perform
1. Create Network
2. Auto piping
3. System Check again
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101. Click Tree icon to view
line diagram of this system
User Guide
101. Click Tree icon to view line diagram of this system
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102. Click Schematic Diagram icon
for seeing schematic diagram
of the system
104. Click Drawing Export icon
105. This window will appear
106. Input name of exporting
file and click Save
103. Click either of these icon for
seeing control wire, power line
and pipe line
User Guide
102. Click Schematic Diagram icon for seeing schematic diagram of the system
103. Click either of these icon for seeing control wire, power line and pipe line
104. Click Drawing Export icon
105. This window will appear
106. Input name of exporting file and click Save
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108. This Window will pop up.
Clicking each menu will generate the
corresponding report
109. Finally press ok for viewing the above
selected report on excel sheet
Note: You need MS Excel program installed
on your computer for executing this
command
107. Click Generate Report
icon
User Guide
107. Click Generate Report icon
108. This Window will pop up.
Clicking each menu will generate the corresponding report
109. Finally press ok for viewing the above selected report on excel sheet
Note: You need MS Excel program installed on your computer for executing this
command
100© 2007 Air-conditioning Academy All rights reserved
1. Proposal Sheet 2. Contact Detail Sheet 3. Table of Contents Sheet
User Guide
1. Proposal Sheet
2. Contact Detail Sheet
3. Table of Contents Sheet
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4. Building-Load
Output Sheet
5. Model Selection
Summary Sheet
6. Outdoor Model
Selection Sheet
User Guide – Final Report
4. Building-Load Output Sheet
5. Model Selection Summary Sheet
6. Outdoor Model Selection Sheet
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7. Indoor Model Selection Sheet 8. Model Selection Tree
User Guide – Final Report
7. Indoor Model Selection Sheet
8. Model Selection Tree
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9. Model Selection Diagram 10. Model Selection Analysis Sheet
User Guide – Final Report
9. Model Selection Diagram
10. Model Selection Analysis Sheet
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1. When outdoor unit is below the indoor units
It is a height between chosen floor and linked floor (can’t be negative)
Height of the indoor unit from the floor on which it is located
This software always consider outdoor unit on topmost floor of the Floor Viewer.
All the distance in Floor Viewer are defined from ground level
User Guide - Tips
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2. When outdoor is above indoor unit
1. Outdoor unit is place on the topmost floor of the Floor Viewer(Floor0)
2. Floor1 is linked with Floor0 and Floor2 is linked with Floor1 which implies height between floor 0 and 1 is 5m (15 - 10) and height between floor 2 and 1 is 10m (10 – 0)
3. The below most row in this column (Floor2) is the floor placed at ground level.
3. When indoor units are placed above and below the outdoor unit
1. Outdoor unit is place on the topmost floor of the Floor Viewer(Floor0)
2. Floor1 is linked with Floor0, Floor2 is linked with Floor0 and floor3 is linked with floor2 which implies height between floor 0 and 1 is 5m (15 - 10), height between floor 2 and 0 is 5m (10 –5) and height between floor 3 and 2 is 5m (5-0)
3. The below most row in this column (Floor3) is the floor placed at ground level.
All the distance in Floor Viewer are defined from ground level
User Guide