Unit selection base on cooling load
___________________________________________________________________________________
___________________________________________________________________________________
- 24 -
2) Indoor unit selection
Select the suitable capacity for condition of ‘Indoor 20°C (WB), Outdoor 35°C (DB)’ using
indoor unit capacity table. The selected result is as follows. (Assuming the indoor unit type is
duct)
Location
Room A Room B Room C Room D Room E
Room F
Load (KW)
2.1
2.8
3.5
4.6
5.8
7.2
Unit size
22
28
36
45
56
71
Capacity (KW)
2.5
3.1
3.9
4.9
6.0
7.6
3) Outdoor unit selection
[1] Assume the indoor unit and outdoor unit combination as follows
Outdoor unit: YDS-280WC35A
Indoor unit: YDS -22UC15EA× 1, YDS -28UC15EA × 1, YDS -36UC15EA× 1,YDS -
45UC15EA × 1, YDS -56UC15EA × 1, YDS -71UC15EA × 1,
Indoor unit combination total capacity index
22 × 1 +28 × 1+ 36 × 1 +45 × 1+ 56 × 1 + 71 × 1 = 258, (258/ 280) × 100%= 92%
[2] Result: Because it is within 50
～
130%, it is a ”Right” selection.
[3] Real function data with indoor unit combination
a . For the 92% combination, calculate the cooling capacity of outdoor unit (YDS -
280WA35A).
26.41KW
←
90% (Indoor temperature: WB 20°C, Outdoor temperature: DB 35°C)
29.33KW
←
100% (Indoor temperature: WB 20°C, Outdoor temperature: DB 35°C)
Then calculated the outdoor capacity in 92% combination index:
Therefore: 26.41 + {(29.33 – 26.41)/ 10} ×2= 27.00;
b. Outdoor unit (YDS-280WC35A) cooling temperature: DB 35°C)
c. Capacity change factor with pipe length (50m) and height difference (30m): 0.905
d. Each cooling capacity
YDS -22UC15EA: 27.00 × 22/258 × 0.905 = 2.08(KW)
YDS -28UC15EA: 27.00 × 28/258 ×0.905 = 2.65 (KW)
YDS -36UC15EA: 27.00 × 36/258 ×0.905 = 3.41 (KW)
YDS -45UC15EA: 27.00 × 45/258 ×0.905 = 4.26 (KW)
YDS -56UC15EA: 27.00 × 56/258 ×0.905= 5.30 (KW)
YDS -71UC15EA: 27.00 × 71/258 ×0.905 = 6.70 (KW)
Location
Room A Room B Room C Room D Room E
Room F
Load (KW)
2.1
2.8
3.5
4.6
5.8
7.2
Unit size
22
28
36
45
56
71
Capacity (KW) 2.08
2.65
3.41
4.26
5.30
6.70
Summary of Contents for R-410A
Page 103: ...Wall mount 102 Part 4 2 Wall Mounted...
Page 113: ...Wall mount 112 4 Dimensions 4 1 YDS 22 36EC 4 2 YDS 45 56EC...
Page 115: ...Wall mount 114 5 Piping Diagrams 5 1 YDS 22 56EC 5 2 YDS 22 56HC...
Page 116: ...Wall mount 115 6 Wiring diagrams 6 1 YDS 22 36EC 6 2 YDS 45 56EC...
Page 117: ...Wall mount 116 6 3 YDS 22 56HC...
Page 118: ...Wall mount 117 7 Sound level 7 1 Test condition 7 2 Noise spectrums YDS 22 36EC HC...
Page 119: ...Wall mount 118 YDS 45 56EC HC...
Page 120: ...Wall mount 119 8 Velocity temperature distribution Discharge angle 70...
