Bryant 581A/B User Manual
Page 95
95
PERFORMANCE DATA (cont)
COOLING CAPACITIES — UNITS WITH PERFECT HUMIDITY™ ADAPTIVE DEHUMIDIFICATION SYSTEM OPTION
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).
581B036 (3 TONS) — SUBCOOLING MODE
Temp (F)
Air Ent
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
900/0.14
1200/0.17
1500/0.20
Air Entering Evaporator — Ewb (F)
72
67
62
72
67
62
72
67
62
75
TC
41.3
37.3
34.3
43.5
39.2
35.9
45.5
41.6
38.2
SHC
17.5
22.4
26.7
19.6
25.5
31.2
21.5
28.5
35.2
kW
2.19
2.14
2.10
2.21
2.16
2.14
2.24
2.19
2.16
85
TC
38.6
34.4
31.6
41.3
37.5
33.3
43.5
38.6
35.5
SHC
15.2
20.1
25.1
17.1
23.2
29.0
18.9
26.3
32.9
kW
2.46
2.40
2.37
2.47
2.43
2.40
2.51
2.45
2.42
95
TC
35.9
31.4
28.8
39.2
35.9
30.6
41.3
35.7
32.9
SHC
13.0
17.9
23.3
14.5
21.1
26.9
16.1
24.2
30.6
kW
2.74
2.68
2.63
2.76
2.74
2.67
2.80
2.75
2.71
105
TC
33.8
29.7
27.4
36.3
32.2
28.7
38.1
32.8
30.4
SHC
10.9
15.8
21.0
12.5
18.9
24.6
14.0
21.7
28.1
kW
3.05
3.00
2.97
3.09
3.04
2.99
3.12
3.07
3.03
115
TC
31.8
28.0
25.5
33.2
28.7
26.5
34.9
30.0
27.9
SHC
9.0
13.7
18.4
10.3
16.8
22.3
11.9
19.3
25.2
kW
3.40
3.36
3.31
3.45
3.38
3.32
3.48
3.41
3.37
125
TC
28.7
26.3
23.4
29.7
25.5
22.9
31.3
27.1
25.5
SHC
6.9
12.2
17.3
7.9
14.5
20.6
9.2
17.3
22.3
kW
3.78
3.73
3.66
3.84
3.77
3.71
3.87
3.79
3.75
581B036 (3 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
900
1200
1500
900
1200
1500
900
1200
1500
80
TC
12.83
15.84
18.20
13.24
16.31
18.73
13.58
16.72
19.18
SHC
4.06
5.69
6.98
2.21
3.83
5.12
.59
2.20
3.50
kW
2.12
2.12
2.12
2.13
2.13
2.13
2.14
2.14
2.14
75
TC
13.61
16.44
18.67
14.03
16.93
19.20
14.39
17.34
19.67
SHC
4.62
6.16
7.37
2.89
4.43
5.65
1.40
2.93
4.15
kW
2.11
2.11
2.11
2.12
2.12
2.12
2.14
2.14
2.14
70
TC
14.39
17.05
19.14
14.82
17.54
19.68
15.19
17.96
20.15
SHC
5.17
6.62
7.77
3.58
5.03
6.18
2.20
3.65
4.80
kW
2.10
2.10
2.10
2.12
2.12
2.12
2.13
2.13
2.13
60
TC
15.95
18.26
20.08
16.40
18.77
20.63
16.79
19.21
21.11
SHC
6.27
7.55
8.56
4.95
6.23
7.24
3.81
5.09
6.10
kW
2.09
2.09
2.09
2.11
2.11
2.11
2.12
2.12
2.12
50
TC
17.50
19.48
21.02
17.98
20.00
21.58
18.40
20.45
22.07
SHC
7.37
8.47
9.35
6.32
7.43
8.30
5.42
6.52
7.39
kW
2.07
2.07
2.07
2.10
2.10
2.10
2.12
2.12
2.12
40
TC
19.06
20.69
21.07
19.56
21.23
22.54
20.00
21.70
23.03
SHC
8.47
9.40
10.13
7.71
8.63
9.36
7.02
7.95
8.69
kW
2.06
2.06
2.06
2.08
2.08
2.08
2.11
2.11
2.11
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
5
81B0
36-
15
0