Technibel CAFM1V Series Technical Data Manual page 24

2. System Design
2-11. System Example
(1) Below are the tables created using the "Sanyo PAC/GHP System Diagram Software."
Details of the calculations are shown in (2).
Selection conditions
Assumes that installation is in a 50 Hz region.
Selected model
Air condition
(DB/WB)
Cooling
Max. load (kW)
Air condition
(DB/WB)
Heating
Max. load (kW)
Actual tubing length
Equivalent length (with
consideration for curves,etc.)
Preliminary selection
Selected model
Load (cooling/heating) (kW)
Rated capacity
(cooling/heating) (kW)
(5) Corrected capacity
(cooling/heating) (kW)
(7) Actual capacity
(cooling/heating) (kW)
Total corrected capacity of indoor units (cooling/heating) = 11.96 / 12.91
Ruc = 11.96 / 11.17 = 1.071 > 1
Outdoor unit changes
During heating, the corrected outdoor unit capacity is less than the total corrected capacity of all indoor units
in the system. As a result, the actual capacity of each indoor unit is less than the maximum load. Therefore
the outdoor unit is increased by one rank.
Selected model
Maximum load
(cooling/heating) (kW)
Rated capacity
(cooling/heating) (kW)
(5) Corrected capacity
(cooling/heating) (kW)
(7) Actual capacity
(cooling/heating) (kW)
Total corrected capacity of all indoor units (cooling/heating) = 11.96 / 12.91
Ruc = 11.96 / 12.77 = 0.937 < 1
Outdoor
unit
50 m
10 m
Elevation
10 m
difference: 10 m
Indoor Indoor
unit 1 unit 2
Room 1
Outdoor unit
(indoor unit 1)
Type 18
GRFMI306R5
33.0 / 22.5 26.0 / 18.0
5.4
3.0 / 2.0 21.0 / 13.0
5.6
100 m 60 m
120 m 72 m
Room 1
Outdoor unit
(indoor unit 1)
Type 18
GRFMI406R5
5.4 / 5.6
5.6 / 6.3
14.0 / 16.0
11.17 / 13.20 5.60 / 5.96
5.32 / 5.96
Ruh = 12.91 / 13.20 = 0.978 < 1
Room 1
Outdoor unit
(indoor unit 1)
Type 18
GRFMI506R5
5.4 / 5.6
5.6 / 6.3
16.0 / 18.0
5.60 / 5.96
12.77 / 14.85
5.60 / 5.96
Ruh = 12.91 / 14.85 = 0.869 < 1
2 - 17
Design of Mini Multiset
20 m 20 m
10 m 10 m
Indoor Indoor
unit 3 unit 4
Room 2 Room 3
(indoor unit 2) (indoor unit 3)
Type 7 Type 7
26.0 / 18.0 26.0 / 18.0
1.8 2.1
21.0 / 13.0 21.0 / 13.0
2.3 2.3
70 m 90 m
84 m 108 m
Room 2 Room 3
(indoor unit 3 )
(indoor unit 2)
Type 7 Type 7
1.8 / 2.3 2.1 / 2.3
2.2 / 2.5 2.2 / 2.5
2.20 / 2.35 2.11 / 2.31
2.09 / 2.35 2.00 / 2.31
Room 2 Room 3
(indoor unit 2) (indoor unit 3)
Type 7 Type 7
1.8 / 2.3 2.1 / 2.3
2.2 / 2.5 2.2 / 2.5
2.20 / 2.35 2.11 / 2.31
2.11 / 2.31
2.20 / 2.35
Room 4
(indoor unit 4)
Type 7
26.0 / 18.0
2.1
21.0 / 13.0
2.3
100 m
120 m
Room 4
(indoor unit 4)
Type 7
2.1 / 2.3
2.2 / 2.5
2.05 / 2.29
1.95 / 2.29
Room 4
(indoor unit 4)
Type 7
2.1 / 2.3
2.2 / 2.5
2.05 / 2.29
2.05 / 2.29
2