COOLING CAPACITIES (cont)
50HX042 (3
1
⁄
2
TONS)
Temp (F)
Outdoor
Ent Air
Indoor Air — Cfm/BF
1225/0.09
1400/0.10
1575/0.11
Indoor Air — Ewb (F)
72
67
63*
62
72
67
63*
62
72
67
63*
62
85
TC
46.1
42.6
39.7
38.9
46.6
43.2
40.4
39.8
47.4
43.7
40.9
40.5
SHC
22.9
29.5
28.8
35.7
23.7
31.2
30.6
38.0
24.8
32.7
32.2
39.9
kW
3.72
3.67
3.64
3.63
3.80
3.75
3.72
3.71
3.88
3.82
3.79
3.79
95
TC
44.3
40.9
37.9
37.3
44.8
41.5
38.6
38.1
45.5
41.9
39.1
38.8
SHC
22.3
28.9
28.1
34.8
23.1
30.6
29.8
37.0
24.2
32.3
31.4
38.7
kW
4.08
4.03
4.00
3.98
4.16
4.11
4.08
4.06
4.24
4.19
4.15
4.15
105
TC
42.5
39.1
36.2
35.6
43.0
39.6
36.7
36.4
43.1
40.0
37.2
37.3
SHC
21.7
28.2
27.3
33.9
22.5
29.9
29.0
35.9
23.2
31.5
30.5
37.3
kW
4.48
4.43
4.39
4.37
4.56
4.50
4.47
4.46
4.63
4.58
4.54
4.55
115
TC
40.6
37.2
34.3
33.8
41.0
37.7
34.8
34.7
41.2
38.0
35.2
35.7
SHC
21.1
27.5
26.5
32.9
21.9
29.3
28.2
34.6
22.7
30.9
29.8
35.6
kW
4.93
4.87
4.82
4.80
5.01
4.95
4.90
4.89
5.08
5.02
4.98
4.99
50HX048 (4 TONS)
Temp (F)
Outdoor
Ent Air
Indoor Air — Cfm/BF
1400/0.05
1600/0.05
1800/0.06
Indoor Air — Ewb (F)
72
67
63*
62
72
67
63*
62
72
67
63*
62
85
TC
54.2
49.0
45.4
44.1
55.1
49.8
46.2
45.1
55.8
50.5
46.8
46.2
SHC
26.9
34.3
33.3
41.4
28.3
36.6
35.5
44.2
29.7
38.8
37.7
46.1
kW
4.25
4.18
4.14
4.13
4.31
4.24
4.20
4.19
4.38
4.31
4.26
4.26
95
TC
51.9
46.8
43.1
41.9
52.8
47.5
43.8
43.1
53.2
48.1
44.3
44.4
SHC
26.2
33.5
32.4
40.3
27.6
35.8
34.6
43.0
28.9
38.1
36.7
44.4
kW
4.71
4.64
4.60
4.58
4.78
4.70
4.66
4.64
4.83
4.77
4.72
4.71
105
TC
49.5
44.4
40.8
39.7
50.2
45.1
41.4
41.1
50.8
45.6
41.8
42.4
SHC
25.4
32.7
31.4
39.2
26.8
35.0
33.6
41.1
28.1
37.3
35.7
42.4
kW
5.21
5.13
5.09
5.07
5.27
5.19
5.15
5.15
5.34
5.26
5.22
5.23
115
TC
46.9
41.8
38.4
37.6
47.6
42.4
38.9
39.1
48.0
42.8
39.3
40.3
SHC
24.7
31.7
30.4
37.6
26.0
34.0
32.6
39.1
27.3
36.2
34.6
40.3
kW
5.77
5.67
5.60
5.59
5.84
5.74
5.67
5.68
5.90
5.80
5.74
5.77
50HX060 (5 TONS)
Temp (F)
Outdoor
Ent Air
Indoor Air — Cfm/BF
1800/0.03
2000/0.04
2250/0.04
Indoor Air — Ewb (F)
72
67
63*
62
72
67
63*
62
72
67
63*
62
85
TC
66.8
60.0
55.7
54.1
67.5
60.7
56.3
55.4
68.2
61.2
56.8
57.1
SHC
34.3
44.2
42.6
53.3
35.8
46.7
45.0
55.4
37.7
49.7
47.8
57.1
kW
5.94
5.71
5.56
5.53
6.04
5.80
5.65
5.64
6.14
5.91
5.75
5.78
95
TC
63.5
57.0
52.8
51.6
64.1
57.5
53.4
53.1
64.6
58.0
53.8
54.6
SHC
33.2
43.0
41.5
51.6
34.7
45.5
43.8
53.1
36.5
48.4
46.5
54.6
kW
6.50
6.27
6.10
6.08
6.60
6.35
6.19
6.20
6.70
6.46
6.29
6.34
105
TC
60.0
53.9
49.9
49.3
60.5
54.2
50.3
50.7
61.0
54.6
50.7
52.1
SHC
32.1
41.8
40.3
49.3
33.5
44.2
42.5
50.7
35.3
47.2
45.3
52.1
kW
7.13
6.88
6.70
6.70
7.22
6.96
6.79
6.83
7.33
7.07
6.89
6.97
115
TC
56.4
50.6
46.9
47.1
57.0
51.0
47.3
48.2
57.3
51.3
47.6
49.5
SHC
30.9
40.6
39.2
47.0
32.4
43.0
41.3
48.2
34.2
46.0
44.0
49.5
kW
7.79
7.52
7.33
7.37
7.89
7.62
7.42
7.50
8.00
7.72
7.53
7.64
LEGEND
BF
— Bypass Factor
Edb
— Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW
— Total Unit Power Input
Ldb
— Leaving Dry-Bulb
Lwb
— Leaving Wet-Bulb
SHC — Sensible Heat Capacity (1000 Btuh) Net
TC
— Total Capacity (1000 Btuh) Net
*At 75 F entering dry bulb (Tennessee Valley Authority [TVA] rating conditions); all others at 80 F entering dry bulb.
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
sensible capacity (Btuh)
tldb = tedb −
1.10 x cfm
tedb = Wet-bulb temperature corresponding to enthalpy of air leaving indoor coil (hlwb)
total capacity (Btuh)
hlwb = hewb −
4.5 x cfm
Where: hewb = Enthalpy of air entering indoor coil
3. The SHC is based on 80 F edb temperature of air entering indoor coil.
Below 80 F edb, subtract (corr factor x cfm) from SHC.
Above 80 F edb, add (corr factor x cfm) to SHC.
Correction Factor = 1.10 x (1 − BF) x (edb − 80).
13