C
ombination,%
(Capacity index)
Outdoor Temperature(℉)
Indoor Temperature(℉,DB)
68℉
TC
PI
DB
WB
Btu/h
kW
100%
68
-6
90,422
10.24
1
0
95,881
10.45
5
3
99,293
10.67
10
9
101,341
10.62
14
12
104,753
10.4
19
18
106,459
9.57
23
21
107,482
8.99
27
25
107,482
8.15
32
30
107,482
7.68
37
36
107,482
7.25
41
39
107,482
6.88
45
43
107,482
6.70
48
46
107,482
6.38
52
50
107,482
6.08
55
54
107,482
5.81
59
57
107,482
5.61
Hydro Unit HT
5. Capacity correction
8TON DVM S TDB Heat Capacity Table
Example) Combination: 8TON DVM S + 4TON HT X 2ea, Outdoor 41˚F DB, EW/LW=131˚F/149˚F
1) Defrosting correction factor (Outdoor unit, 41˚F) = 0.91
2) Capacity correction factor (Hydro unit HT) = 0.3
3) Integrated capacity correction factor = 0.91 - (1 - 0.91) x 0.3 = 0.883
4) HC = 0.883 x 54,500Btu/h x 2ea = 109,000Btu/h
5) Power input (Outdoor unit) = 6.88kW
6) Power input (Hydro unit HT) = { 0.91 x ( 2,453W + 2,419W ) / 2 + ( 1 - 0.91 ) x 1,050W } x 2 = 4.62kW
7) Total PI = 6.88 + 4.62 = 11.5kW
Correction Factor : Ref.P
1
6
, Hydro Unit Capacity Table : Ref.P.
1
2
