Bryant 581A/B User Manual
Page 100
100
PERFORMANCE DATA (cont)
COOLING CAPACITIES — UNITS WITH PERFECT HUMIDITY™ ADAPTIVE DEHUMIDIFICATION SYSTEM OPTION (cont)
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
Where: h
ewb
= Enthalpy of air entering evaporator coil.
3. The SHC is based on 80 F edb temperature of air entering evapo-
rator 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).
581B102 (8
1
/
2
TONS) — SUBCOOLING MODE
Temp (F)
Air Ent
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
2550/0.08
3000/0.09
3400/0.11
4250/0.13
Air Entering Evaporator — Ewb (F)
72
67
62
72
67
62
72
67
62
72
67
62
75
TC
114.1
104.1
97.8
116.3
108.5
103.4
117.6
111.9
108.0
122.2
118.9
111.4
SHC
49.8
64.2
81.2
52.6
70.8
89.0
55.4
76.9
95.4
62.0
87.0
107.2
kW
5.57
5.46
5.44
5.59
5.50
5.44
5.60
5.51
5.44
5.62
5.62
5.69
85
TC
107.3
98.4
92.6
111.0
101.8
98.0
113.0
104.2
102.0
117.1
111.4
106.1
SHC
42.2
58.3
76.0
47.1
64.5
83.5
51.2
70.2
89.2
57.3
81.2
101.2
kW
6.32
6.30
6.15
6.32
6.27
6.18
6.34
6.22
6.20
6.30
6.31
6.45
95
TC
101.9
92.4
86.8
105.3
95.5
92.8
107.4
97.7
96.5
112.1
103.7
100.3
SHC
35.4
51.9
70.3
40.1
58.5
77.9
44.9
64.9
83.7
52.1
74.0
94.8
kW
7.06
7.13
6.93
7.06
7.06
6.95
7.06
6.99
6.98
7.01
7.04
7.17
105
TC
94.5
85.4
77.0
97.6
88.3
82.4
99.9
90.6
88.0
104.1
96.1
94.0
SHC
29.7
45.7
63.2
33.9
52.2
70.1
38.0
58.3
75.7
44.4
67.6
88.5
kW
7.99
8.00
7.81
8.01
7.97
7.85
8.02
7.94
7.89
7.96
7.96
8.08
115
TC
86.4
75.0
68.3
89.3
80.2
74.1
91.4
83.2
78.4
96.5
88.4
87.1
SHC
24.0
38.7
56.4
27.4
45.6
62.9
31.1
51.9
67.0
37.0
60.8
81.8
kW
8.91
8.83
8.66
8.93
8.86
8.76
8.97
8.86
8.84
8.91
8.93
8.90
125
TC
78.6
65.5
60.2
81.3
68.9
64.7
83.3
71.6
68.2
88.5
78.8
78.9
SHC
18.3
32.0
48.8
21.2
38.0
53.5
24.1
44.1
57.5
29.4
53.3
73.8
kW
9.81
9.65
9.53
9.86
9.68
9.64
9.89
9.71
9.75
9.90
9.72
9.88
581B102 (8
1
/
2
TONS) — HOT GAS REHEAT MODE
Temp (F)
Air Ent
Condenser
(Edb)
Air Entering Evaporator — Ewb (F)
75 Dry Bulb
62.5 Wet Bulb
(50% Relative)
75 Dry Bulb
64 Wet Bulb
(55% Relative)
75 Dry Bulb
65.3 Wet Bulb
(60% Relative)
Air Entering Evaporator — Cfm
2550
3000
3400
4250
2550
3000
3400
4250
2550
3000
3400
4250
80
TC
43.44
46.26
48.45
52.38
45.26
48.15
50.39
54.43
46.84
49.79
52.08
56.20
SHC
12.34
16.78
20.29
26.74
5.79
10.15
13.60
19.93
0.11
4.40
7.80
14.03
kW
6.31
6.31
6.31
6.31
6.05
6.05
6.05
6.05
5.83
5.83
5.83
5.83
75
TC
44.33
47.00
49.06
52.78
46.12
48.85
50.97
54.78
47.67
50.46
52.63
56.52
SHC
12.92
17.12
20.44
26.54
6.81
10.94
14.20
20.20
1.51
5.58
8.79
14.70
kW
6.38
6.38
6.8
6.38
6.15
6.15
6.15
6.15
5.95
5.95
5.95
5.95
70
TC
45.22
47.73
49.68
53.18
46.98
49.55
51.55
55.14
48.51
51.14
53.18
56.84
SHC
13.50
17.47
20.59
26.34
7.83
11.73
14.81
20.46
2.92
6.76
9.79
15.36
kW
6.46
6.46
6.46
6.46
6.25
6.25
6.25
6.25
6.07
6.07
6.07
6.07
60
TC
46.99
49.19
50.90
53.97
48.70
50.96
52.71
55.86
50.18
52.49
54.27
57.49
SHC
14.67
18.15
20.90
25.95
9.88
13.31
16.01
20.99
5.73
9.11
11.78
16.68
kW
6.60
6.60
6.60
6.60
6.45
6.45
6.45
6.45
6.32
6.32
6.32
6.32
50
TC
48.77
50.66
52.13
54.77
50.42
52.36
53.87
56.57
51.85
53.83
55.37
58.14
SHC
15.83
18.83
21.20
25.56
11.93
14.89
17.22
21.51
8.55
11.47
13.77
18.01
kW
6.74
6.74
6.74
6.74
6.64
6.64
6.64
6.64
6.56
6.56
6.56
6.56
40
TC
50.54
52.13
53.35
55.56
52.14
53.76
55.02
57.29
53.53
55.18
56.47
58.78
SHC
17.00
19.52
21.51
25.16
13.98
16.47
18.43
22.04
11.36
13.82
15.76
19.33
kW
6.88
6.88
6.88
6.88
6.84
6.84
6.84
6.84
6.81
6.81
6.81
6.81
BF
— Bypass Factor
Edb
— Entering Dry Bulb
Ewb — Entering Wet Bulb
kW
— Compressor Motor Power Input
SHC — Sensible Heat Capacity (1000 Btuh) Gross
TC
— Total Capacity (1000 Btuh) Gross
t
ldb
=
t
edb
–
sensible capacity (Btuh)
1.10 x cfm
t
lwb
= Wet-bulb temperature corresponding to enthalpy of air
leaving evaporator coil (h
lwb
)
h
lwb
= h
ewb
–
total capacity (Btuh)
4.5 x cfm
581
B0
36
-15
0