Bryant 579F User Manual page 105

COOLING CAPACITIES — UNITS WITH PERFECT HUMIDITY™ ADAPTIVE DEHUMIDIFICATION SYSTEM OPTION (cont)
581B120 (10 TONS) — SUBCOOLING MODE
Temp (F)
3000/0.03
Air Ent
Condenser
(Edb)
72
TC 134.3
75
SHC 60.0
kW 7.03
TC 127.6
85
SHC 51.5
kW 7.96
TC 120.9
95
SHC 43.0
kW 8.88
TC 112.0
105
SHC 36.1
kW 10.0
TC 103.0
115
SHC 29.2
kW 11.2
TC 94.1
125
SHC 22.3
kW 12.35
581B120 (10 TONS) — HOT GAS REHEAT MODE*
Temp (F)
Air Ent
Condenser
(Edb)
3000
TC 49.15
80 SHC 9.58
kW 7.39
TC 49.60
75 SHC 10.07
kW 7.56
TC 50.04
70 SHC 10.56
kW 7.73
TC 50.93
60 SHC 11.54
kW 8.07
TC 51.82
50 SHC 12.53
kW 8.42
TC 52.71
40 SHC 13.51
kW 8.76
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
*Negative SHC value indicates that the air entering the coil is being heated.
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
3200/0.03
67 62 72
122.5 111.4 135.8
76.1 93.7 61.3
6.84 6.72 7.01
115.4 104.6 128.9
68.8 87.2 53.9
7.86 7.59 7.94
108.3 97.8 121.9
61.5 80.6 46.5
8.87 8.46 8.86
99.9 90.4 113.1
54.1 73.8 38.8
10.0 9.6 10.0
91.5 83.1 104.3
46.7 66.9 31.2
11.1 10.8 11.2
83.1 75.7 95.5
39.3 60.1 23.5
12.15 11.94 12.38
75 Dry Bulb
62.5 Wet Bulb
(50% Relative)
3200 4000 5000
50.16 53.80 57.72
12.02 20.74 29.89
7.38 7.38 7.37
50.61 54.30 58.28
12.38 20.60 29.23
7.56 7.55 7.55
51.07 54.81 58.83
12.73 20.47 28.58
7.73 7.72 7.72
51.98 55.81 59.93
13.44 20.19 27.28
8.07 8.07 8.06
52.90 56.81 61.03
14.14 19.92 25.98
8.42 8.41 8.41
53.81 57.82 62.13
14.85 19.64 24.67
8.76 8.76 8.75
Air Entering Evaporator — Cfm/BF
4000/0.04
Air Entering Evaporator — Ewb (F)
67 62 72
124.3 113.0 138.4
79.1 97.4 68.0
6.89 6.77 7.10
118.1 107.0 132.5
72.0 91.2 61.0
7.78 7.51 8.02
111.8 101.0 126.5
64.8 84.9 53.9
8.66 8.26 8.94
103.2 93.4 117.2
57.8 78.9 45.6
9.8 9.5 10.1
94.6 85.9 107.8
50.7 72.9 37.3
11.0 10.7 11.3
86.0 78.3 98.5
43.7 66.8 29.0
12.13 11.92 12.48
Air Entering Evaporator — Ewb (F)
75 Dry Bulb
64 Wet Bulb
(55% Relative)
Air Entering Evaporator — Cfm
3000 3200 4000
51.04 52.08 55.86
2.88 5.29 13.88
7.45 7.45 7.44
51.45 52.50 56.33
3.82 6.09 14.20
7.63 7.63 7.62
51.86 52.92 56.80
4.75 6.89 14.52
7.81 7.81 7.81
52.68 53.77 57.73
6.62 8.49 15.16
8.18 8.18 8.17
53.50 54.62 58.66
8.50 10.09 15.80
8.54 8.54 8.54
54.32 55.46 59.59
10.37 11.70 16.43
8.91 8.91 8.91
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 = Enthalpy of air entering evaporator coil.
ewb
3. The SHC is based on 80 F edb temperature of air entering evaporator
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).
105
5000/0.04
67 62 72
129.5 123.5 143.3
89.5 109.4 75.2
6.92 6.77 7.15
121.5 116.6 137.2
82.7 102.4 68.6
7.84 7.69 8.02
113.4 109.7 131.1
75.9 95.4 62.0
8.76 8.60 8.89
105.0 100.7 122.1
68.2 86.8 53.0
9.9 9.8 10.1
96.7 91.7 113.0
60.6 78.3 44.0
11.1 11.0 11.3
88.3 82.7 104.0
52.9 69.7 35.0
12.27 12.25 12.53
75 Dry Bulb
65.3 Wet Bulb
(60% Relative)
5000 3000 3200
59.94 52.67 53.74
22.89 – 2.92 -0 .55
7.43 7.50 7.50
60.45 53.05 54.14
–
22.70 1.60 0.64
7.62 7.69 7.69
60.96 53.43 54.53
–0
22.52 .28 1.83
7.80 7.89 7.88
61.99 54.20 55.32
22.15 2.36 4.21
8.17 8.27 8.27
63.01 54.96 56.10
21.78 5.00 6.58
8.54 8.66 8.65
64.04 55.72 56.89
21.41 7.64 8.96
8.90 9.04 9.04
sensible capacity (Btuh)
–
1.10 x cfm
)
lwb
total capacity (Btuh)
–
4.5 x cfm
67 62
136.5 130.2
100.9 123.3
7.03 6.88
128.0 122.9
93.6 115.9
7.94 7.79
119.4 115.5
86.2 108.4
8.85 8.69
110.5 105.9
78.3 99.7
10.0 9.9
101.6 96.4
70.3 90.9
11.2 11.1
92.7 86.8
62.4 82.2
12.30 12.28
4000 5000
57.65 61.86
7.93 16.83
7.49 7.49
58.09 62.34
8.65 17.05
7.69 7.68
58.52 62.82
9.36 17.26
7.88 7.87
59.39 63.77
10.79 17.70
8.26 8.26
60.26 64.73
12.22 18.14
8.65 8.65
61.13 65.69
13.65 18.58
9.04 9.03