Kaysun Amazon Unitario Top Discharge, Engineering Data Book

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Ka
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Amazon Unitario Top Discharge
12
Table 1-5.5: Extract from Table 1-5.2 Combinations of Indoor and outdoor units
Outdoor unit capacity Sum of capacity indexes of
connected indoor units (standard
indoor units only)
Maximum number of
connected indoor units kW HP
Capacity
index
50.0 18 500 250 to 750 29
56.0 20 560 280 to 840 33
59.0 22 590 295 to 885 36
67.0 24 670 335 to 1005 39
73.0 26 730 365 to 1095 43
75.5 28 755 377.5 to 1132.5 46
85.0 30 850 425 to 1275 50
90.0 32 900 450 to 1350 53
ƒ
The number of connected indoor units is 8 and the maximum number of connected indoor units on the 20HP outdoor
unit is 33, so the number of connected indoor units is within the limitation.
ƒ
Calculate the corrected capacity of the outdoor unit:
a) The sum of the indoor unit CIs is 706 and the CI of the 20HP outdoor unit (K2UF-560 DN4S-E) is 560, so the
combination ratio is 706 / 560 = 126%.
b) Using the outdoor unit’s cooling capacity table, interpolate to obtain the capacity (“B”) corrected for outdoor air
temperature, indoor air temperature, and combination ratio. Refer to Tables 1-5.6 and 1-5.7.
Table 1-5.6: Extract from Table 2-8.7 K2UF-560 DN4S-E cool -
ing capacity
Table 1-5.7: Cooling capacity calculated by interpolation
CR
Outdoor air
temp.
(°C DB)
Indoor air temp.
(°C DB / °C WB)
CR
Outdoor air
temp.
(°C DB)
Indoor air temp.
(°C DB / °C WB)
25.8 / 18.0 25.8 / 18.0
TC PI TC PI
kW kW kW kW
130%
31 61.3 14.33
130% 33 60.4 14.88 33 60.4 14.88
35 59.5 15.46
B = 60 1
120%
31 60.2 13.88
120%
33 59.3 14.44 33 59.3 14.44
35 58.4 15.00
Notes:
1. 59.3 + (60.4 – 59.3) × (126 – 120) / (130 – 120) = 60
.