System design – Sanyo DHX4852 User Manual
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Design of W-2WAY ECO-i SYSTEM Unit Specifications
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2. System Design
2-1. System Example
(1) Below are the tables created using the “Sanyo PAC System Diagram Software.” Details of the calculations are shown in (2).
Outdoor unit
Room 1
(indoor unit 1)
Room 2
(indoor unit 2)
Room 3
(indoor unit 3)
Room 4
(indoor unit 4)
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.)
Outdoor unit
Room 1
(indoor unit 1)
Room 2
(indoor unit 2)
Room 3
(indoor unit 3)
Room 4
(indoor unit 4)
Selected model
Type 1305+0905
Type 604
Type 484
Type 484
Type 184
Type 604
Type 484
Type 484
Type 184
Load (cooling/heating) (kW)
Rated capacity
(cooling/heating) (kW)
[5] Corrected capacity
(cooling/heating) (kW)
[7] Actual capacity
(cooling/heating) (kW)
33.0 / 22.5
68.0 / 76.5
73.0 / 81.5
55.3 / 54.86
59.36 / 58.45
16.00 / 18.00
16.00 / 18.00
16.00 / 18.00
16.00 / 17.74 14.00 / 15.77 13.42 / 15.46
14.00 / 16.00
14.00 / 16.00
14.00 / 16.00
13.42 / 15.69
13.42 / 15.69
13.42 / 15.69
5.23 / 6.07
5.23 / 6.07
5.23 / 6.07
5.23 / 5.98
3.0 / 2.0
21.0 / 13.0
21.0 / 13.0
21.0 / 13.0
21.0 / 13.0
26.0 / 18.0
16.0 / 18.0
16.0 / 18.0
14.0 / 16.0
14.0 / 16.0
14.0 / 16.0
14.0 / 16.0
5.6 / 6.3
5.6 / 6.3
26.0 / 18.0
26.0 / 18.0
26.0 / 18.0
15.0
13.0
13.0
5.5
15.0
13.0
13.0
5.5
15.0
13.0
13.0
5.5
6.2
14.5
14.5
16.0
100 m
120 m
72 m
84 m
108 m
120 m
100 m
90 m
70 m
60 m
Outdoor unit
Room 1
(indoor unit 1)
Room 2
(indoor unit 2)
Room 3
(indoor unit 3)
Room 4
(indoor unit 4)
Selected model
Type 1405+0905
Maximum load
(cooling/heating) (kW)
Rated capacity
(cooling/heating) (kW)
(5) Corrected capacity
(cooling/heating) (kW)
(7) Actual capacity
(cooling/heating) (kW)
Outdoor
unit 1
Indoor
unit 1
Indoor
unit 2
Indoor
unit 3
Indoor
unit 4
Outdoor
unit 2
Elevation
difference: 33 ft
164 ft
33 ft
33 ft
66 ft
33 ft
33 ft
33 ft
Selection conditions
Assumes that installation is in a 60 Hz region.
Outdoor unit
Room 1
(indoor unit 1)
Room 2
(indoor unit 2)
Room 3
(indoor unit 3)
Room 4
(indoor unit 4)
Cooling
Air condition (DB/WB)
91.0 / 72.0
78.0 / 64.0
78.0 / 64.0
78.0 / 64.0
78.0 / 64.0
Max. load (BTU/h)
40,000
40,000
30,000
18,000
Heating
Air condition (DB/WB)
37.0 / 35.0
69.0 / 55.0
69.0 / 55.0
69.0 / 55.0
69.0 / 55.0
Max. load (BTU/h)
46,000
46,000
35,000
23,000
Actual tubing length
291 ft
197 ft
230 ft
263 ft
296 ft
Equivalent length (with consideration
for curves, etc.)
365 ft
236 ft
276 ft
316 ft
355 ft
Preliminary selection
Outdoor unit
Room 1
(indoor unit 1)
Room 2
(indoor unit 2)
Room 3
(indoor unit 3)
Room 4
(indoor unit 4)
Selected model
Type
09053+09053
Type 4852
Type 4852
Type 3652
Type 1852
Load (cooling/heating) (BTU/h)
40,000
40,000
30,000
18,000
Rated capacity
(cooling/heating) (BTU/h)
191,000 /
215,000
47,800 /
54,600
47,800 /
54,600
36,000 /
39,000
19,000 /
21,000
(5) Corrected capacity (cooling/
heating) (BTU/h)
159,600 /
156,100
47,400 /
54,600
46,300 /
54,600
34,000 /
38,900
17,500 /
20,600
(7) Actual capacity
(cooling/heating) (BTU/h)
47,400 /
50,900
46,300 /
50,900
34,000 /
36,300
17,500 /
19,200
Total corrected capacity of indoor units (cooling/heating) = 145,200/168,700
Ruc = 145,200/159,600 = 0.910 < 1 Ruh = 168,700/156,100 = 1.081 > 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.
Outdoor unit
Room 1
(indoor unit 1)
Room 2
(indoor unit 2)
Room 3
(indoor unit 3)
Room 4
(indoor unit 4)
Selected model
Type
14053+09035
Type 4852
Type 4852
Type 3652
Type 1852
Maximum load
(cooling/heating) (BTU/h)
40,000
40,000
30,000
18,000
Rated capacity
(cooling/heating) (BTU/h)
249,100 /
278,100
47,800 /
54,600
47,800 /
54,600
36,000 /
39,000
19,000 /
21,000
(5) Corrected capacity (cooling/
heating) (BTU/h)
208,100 /
201,900
47,400 /
54,600
46,300 /
54,600
34,000 /
38,900
17,500 /
20,600
(7) Actual capacity
(cooling/heating) (BTU/h)
47,400 /
54,600
46,300 /
54,600
34,000 /
38,900
17,500 /
20,600
Total corrected capacity of all indoor units (cooling/heating) = 145,200/163,700
Ruc = 145,200/208,100 = 0.698 < 1 Ruh = 168,700/201,900 = 0.835 < 1
TD831138-02_W-2WAY.indb 17
2007/07/26 14:30:41