Sanyo ECO-i AHX0752 Technical Data Manual page 29

2. System Design
Indoor unit changes
The indoor unit in room 4, where the corrected indoor unit capacity is less than the maximum load, is increased by one rank.
Selected model
Maximum load
(cooling/heating) (BTU/h)
Rated capacity
(cooling/heating) (BTU/h)
(5) Corrected capacity
(cooling/heating) (BTU/h)
(7) Actual capacity
(cooling/heating) (BTU/h)
Total corrected capacity of all indoor units (cooling/heating) = 150,700/174,500
Ruc = 150,700/208,100 = 0.724 < 1 Ruh = 174,500/201,900 = 0.864 < 1
For both cooling and heating in all rooms, actual capacity is now greater than or equal to the maximum load. Selection is
completed.
(2) Calculate the fi nal selection results according to the capacity calculation procedure.
[From calculation of the correction coeffi cient to calculation of actual capacity]
Rated capacity (BTU/h)
(1) Model
(2) Temp. condition
(3) Tubing length,
elevation difference
(4) Frosting/defrosting
Result of (2) × (3)
Correction coefficient
applied to indoor unit *1
(5) Corrected capacity (BTU/h) *2
(6) Correction coefficient
for corrected capacity ratio
(7) Actual capacity (BTU/h)
*1: This varies depending on the values of (2) and (2) × (Distribution ratio in (3)).
*2: Corrected outdoor unit capacity = Rated outdoor unit capacity × (1) × (2) × (3) × (4)
The actual capacity is calculated as shown below.
Cooling: Ruc = (47,400 + 46,300 + 34,000 + 23,000) / 208,100 = 0.724 < 1
Therefore,
Actual cooling capacity of each indoor unit = Corrected cooling capacity of each indoor unit
(In other words, the correction coeffi cient (6) for the corrected capacity ratio is 1.)
Heating: Ruh = (54,600 + 54,600 + 38,900 + 26,400) / 201,900 = 0.864 < 1
Therefore,
Actual heating capacity of each indoor unit = Corrected heating capacity of each indoor unit × (0.1 × Ruh + 0.9) / Ruh
(In other words, the correction coeffi cient (6) for the corrected capacity ratio is (0.1 × Ruh + 0.9) / Ruh.)
Room 1
Outdoor unit
(indoor unit 1)
Type 14053+09053 Type 4852
40,000 / 46,000
249,100 / 278,100 47,800 / 54,600
208,100 / 201,900 47,400 / 54,600
47,400 / 54,600
Room 1
Outdoor unit
(indoor unit 1)
249,100 / 278,100 47,800 / 54,600
1.00 / 1.00
1.020 / 0.937 0.921 / 0.780
0.819 / 0.871 1.077 / 1.052
0.89
0.992 / 1.031
0.99 / 1.03
208,100 / 201,900 47,400 / 54,600
47,400 / 54,600
2-19
Design of W-3WAY ECO-i SYSTEM Unit Specifi cations
Room 2 Room 3
(indoor unit 2) (indoor unit 3)
Type 4852 Type 3652
40,000 / 46,000 30,000 / 35,000
47,800 / 54,600 36,000 / 39,000
46,300 / 54,600 34,000 / 38,900
46,300 / 54,600 34,000 / 38,900
Room 2 Room 3
(indoor unit 2) (indoor unit 3)
47,800 / 54,600 36,000 / 39,000
0.921 / 0.980 0.921 / 0.980
1.052 / 1.035 1.026 / 1.017
0.969 / 1.014 0.945 / 0.997
0.97 / 1.01 0.95 / 1.00
46,300 / 54,600 34,000 / 38,900
1.00 / 1.00
46,300 / 54,600 34,000 / 38,900
Room 4
(indoor unit 4)
Type 2452
18,000 / 23,000
25,000 / 27,000
23,000 / 26,400
23,000 / 26,400
(Cooling/heating)
Room 4
(indoor unit 4)
25,000 / 27,000
0.921 / 0.980
1.00 / 1.00
0.921 / 0.980
0.92 / 0.98
23,000 / 26,400
23,000 / 26,400
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