York Floor Ceiling R-410A 50Hz Service Manual download pdf (Page 25)

Unit selection base on cooling load

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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

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 384 385

TECHNICAL SERVICE MANUAL 1
Part I General Information 5
Contents 18
Part 3 Outdoor 27
YDS-100WC15/35 50
YDS-140WC15/35 50
A 624 1030 52
B 55 52
C 1030 52
Part 4.1 Four-way cassette 72
Piping: 8m (horizontal) 79
Notes: 80
YDS-28-80KC 230 170 89
YDS-90-140KC 300 190 89
Indoor unit H(mm) 90
YDS-28-80KC ≥260 90
YDS-90-140KC ≥300 90
YDS-22-56GC ≥280 90
- 100 101
- 101 102
Part 4.2 Wall Mounted 103
- 103 104
- 104 105
- 105 106
- 106 107
- 107 108
3. Capacity table 109
- 109 110
- 110 111
- 111 112
- 112 113
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- 115 116
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YDS-45-56EC/HC 119
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Part 4.4 Medium ESP Duct 152
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Part 5 Installation 240
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Gr ounded wi r e 281
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Part 6 Control System 289
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Form No. 035M00457-000 385
2009 Johnson Controls, Inc 385

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York Floor Ceiling R-410A 50Hz Service Manual Page 25

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