Sanyo CHDZ09053 - Manual (Page 28)

2-18
Design of W-3WAY ECO-i SYSTEM Unit Specifi cations
1
2
3
4
5
6
7
8
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 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
Solenoid valve kit
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 296 ft 197 ft 230 ft 263 ft 296 ft
Equivalent length (with consideration
for curves, etc.)
365 ft 236 ft 276 ft 316 ft 365 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