Bryant 579F User Manual page 104

COOLING CAPACITIES — UNITS WITH PERFECT HUMIDITY™ ADAPTIVE DEHUMIDIFICATION SYSTEM OPTION (cont)
581B102 (8 1 / TONS) — SUBCOOLING MODE
2
Temp (F)
Air Ent
Condenser
(Edb)
72
TC 114.1
75
SHC 49.8
kW 5.57
TC 107.3
85
SHC 42.2
kW 6.32
TC 101.9
95
SHC 35.4
kW 7.06
TC 94.5
105
SHC 29.7
kW 7.99
TC 86.4
115
SHC 24.0
kW 8.91
TC 78.6
125
SHC 18.3
kW 9.81
581B102 (8 1 / TONS) — HOT GAS REHEAT MODE
2
Temp (F)
Air Ent
Condenser
(Edb)
2550 3000
TC 43.44 46.26
80 SHC 12.34 16.78
kW 6.31
TC 44.33 47.00
75 SHC 12.92 17.12
kW 6.38
TC 45.22 47.73
70 SHC 13.50 17.47
kW 6.46
TC 46.99 49.19
60 SHC 14.67 18.15
kW 6.60
TC 48.77 50.66
50 SHC 15.83 18.83
kW 6.74
TC 50.54 52.13
40 SHC 17.00 19.52
kW 6.88
LEGEND
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
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
2550/0.08
67 62 72
104.1 97.8 116.3
64.2 81.2 52.6
5.46 5.44 5.59
98.4 92.6 111.0
58.3 76.0 47.1
6.30 6.15 6.32
92.4 86.8 105.3
51.9 70.3 40.1
7.13 6.93 7.06
85.4 77.0 97.6
45.7 63.2 33.9
8.00 7.81 8.01
75.0 68.3 89.3
38.7 56.4 27.4
8.83 8.66 8.93
65.5 60.2 81.3
32.0 48.8 21.2
9.65 9.53 9.86
75 Dry Bulb
62.5 Wet Bulb
(50% Relative)
3400 4250
48.45 52.38
20.29 26.74
6.31 6.31 6.31
49.06 52.78
20.44 26.54
6.38 6.8 6.38
49.68 53.18
20.59 26.34
6.46 6.46 6.46
50.90 53.97
20.90 25.95
6.60 6.60 6.60
52.13 54.77
21.20 25.56
6.74 6.74 6.74
53.35 55.56
21.51 25.16
6.88 6.88 6.88
Air Entering Evaporator — Cfm/BF
3000/0.09
Air Entering Evaporator — Ewb (F)
67 62 72
108.5 103.4 117.6
70.8 89.0 55.4
5.50 5.44 5.60
101.8 98.0 113.0
64.5 83.5 51.2
6.27 6.18 6.34
95.5 92.8 107.4
58.5 77.9 44.9
7.06 6.95 7.06
88.3 82.4 99.9
52.2 70.1 38.0
7.97 7.85 8.02
80.2 74.1 91.4
45.6 62.9 31.1
8.86 8.76 8.97
68.9 64.7 83.3
38.0 53.5 24.1
9.68 9.64 9.89
Air Entering Evaporator — Ewb (F)
75 Dry Bulb
64 Wet Bulb
(55% Relative)
Air Entering Evaporator — Cfm
2550 3000 3400
45.26 48.15 50.39
5.79 10.15 13.60
6.05 6.05 6.05
46.12 48.85 50.97
6.81 10.94 14.20
6.15 6.15 6.15
46.98 49.55 51.55
7.83 11.73 14.81
6.25 6.25 6.25
48.70 50.96 52.71
9.88 13.31 16.01
6.45 6.45 6.45
50.42 52.36 53.87
11.93 14.89 17.22
6.64 6.64 6.64
52.14 53.76 55.02
13.98 16.47 18.43
6.84 6.84 6.84
2. The following formulas may be used:
t = t
ldb edb
t = Wet-bulb temperature corresponding to enthalpy of air
lwb
leaving evaporator coil (h
h = h
lwb ewb
Where: h
ewb
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).
104
3400/0.11
67 62 72
111.9 108.0 122.2
76.9 95.4 62.0
5.51 5.44 5.62
104.2 102.0 117.1
70.2 89.2 57.3
6.22 6.20 6.30
97.7 96.5 112.1
64.9 83.7 52.1
6.99 6.98 7.01
90.6 88.0 104.1
58.3 75.7 44.4
7.94 7.89 7.96
83.2 78.4 96.5
51.9 67.0 37.0
8.86 8.84 8.91
71.6 68.2 88.5
44.1 57.5 29.4
9.71 9.75 9.90
75 Dry Bulb
65.3 Wet Bulb
(60% Relative)
4250 2550 3000
54.43 46.84 49.79
19.93 0.11 4.40
6.05 5.83 5.83
54.78 47.67 50.46
20.20 1.51 5.58
6.15 5.95 5.95
55.14 48.51 51.14
20.46 2.92 6.76
6.25 6.07 6.07
55.86 50.18 52.49
20.99 5.73 9.11
6.45 6.32 6.32
56.57 51.85 53.83
21.51 8.55 11.47
6.64 6.56 6.56
57.29 53.53 55.18
22.04 11.36 13.82
6.84 6.81 6.81
sensible capacity (Btuh)
–
1.10 x cfm
)
lwb
total capacity (Btuh)
–
4.5 x cfm
= Enthalpy of air entering evaporator coil.
4250/0.13
67 62
118.9 111.4
87.0 107.2
5.62 5.69
111.4 106.1
81.2 101.2
6.31 6.45
103.7 100.3
74.0 94.8
7.04 7.17
96.1 94.0
67.6 88.5
7.96 8.08
88.4 87.1
60.8 81.8
8.93 8.90
78.8 78.9
53.3 73.8
9.72 9.88
3400 4250
52.08 56.20
7.80 14.03
5.83 5.83
52.63 56.52
8.79 14.70
5.95 5.95
53.18 56.84
9.79 15.36
6.07 6.07
54.27 57.49
11.78 16.68
6.32 6.32
55.37 58.14
13.77 18.01
6.56 6.56
56.47 58.78
15.76 19.33
6.81 6.81