Bryant 579F User Manual page 102

COOLING CAPACITIES — UNITS WITH PERFECT HUMIDITY™ ADAPTIVE DEHUMIDIFICATION SYSTEM OPTION (cont)
581B072 (6 TONS) — SUBCOOLING MODE
Temp (F)
Air Ent
Condenser
(Edb)
72
TC 82.6
75
SHC 36.0
kW 4.60
TC 78.2
85
SHC 31.4
kW 5.16
TC 73.8
95
SHC 27.0
kW 5.75
TC 68.4
105
SHC 22.3
kW 6.37
TC 63.4
115
SHC 18.1
kW 7.04
TC 55.5
125
SHC 15.3
kW 7.80
581B072 (6 TONS) — HOT GAS REHEAT MODE*
Temp (F)
Air Ent
Condenser
(Edb)
TC
80 SHC
kW
TC
75 SHC
kW
TC
70 SHC
kW
TC
60 SHC
kW
TC
50 SHC
kW
TC
40 SHC
kW
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)
1800/0.05
67 62 72
75.6 68.5 84.9
44.8 55.4 37.5
4.52 4.36 4.67
71.6 64.5 80.9
41.2 51.7 33.0
5.03 4.89 5.22
67.4 60.2 76.3
37.6 47.9 28.2
5.60 5.44 5.80
62.6 55.9 71.4
33.5 43.5 23.4
6.22 6.06 6.45
57.8 50.7 66.0
29.5 38.9 18.8
6.89 6.68 7.10
49.6 45.8 58.4
24.0 35.2 15.7
7.61 7.38 7.83
75 Dry Bulb
62.5 Wet Bulb
(50% Relative)
1800 2100 2400
27.41 28.12 28.75
5.74 7.61 9.25
4.40 4.39 4.39
27.98 28.66 29.24
5.73 7.48 9.02
4.45 4.45 4.45
28.55 29.19 29.74
5.71 7.35 8.79
4.51 4.51 4.51
29.70 30.25 30.74
5.67 7.09 8.34
4.62 4.62 4.62
30.84 31.32 31.73
5.63 6.83 7.89
4.74 4.74 4.74
31.99 32.38 32.73
5.60 6.57 7.43
4.86 4.86 4.86
Air Entering Evaporator — Cfm/BF
2100/0.06 2400/0.06
Air Entering Evaporator — Ewb (F)
67 62 72
78.0 70.9 85.9
49.1 59.7 38.8
4.57 4.46 4.70
73.4 65.8 82.0
44.7 55.8 34.7
5.11 4.96 5.26
68.3 60.5 77.5
40.0 51.6 30.2
5.66 5.48 5.84
64.3 56.2 72.1
36.5 48.0 25.4
6.27 6.10 6.46
60.1 51.5 66.4
32.9 44.1 20.7
6.91 6.74 7.12
52.4 46.1 57.6
27.5 39.0 17.5
7.67 7.49 7.89
Air Entering Evaporator — Ewb (F)
75 Dry Bulb
64 Wet Bulb
(55% Relative)
Air Entering Evaporator — Cfm
1800 2100
27.25 27.98
1.68 3.52
4.44 4.44
27.89 28.58
1.92 3.65
4.50 4.50
28.53 29.18
2.17 3.79
4.57 4.57
29.80 30.37
2.65 4.06
4.69 4.69
31.07 31.56
3.14 4.33
4.82 4.82
32.35 32.75
3.63 4.59
4.95 4.95
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 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).
102
3000/0.08
67 62 72
79.5 73.5 89.1
51.1 64.0 41.8
4.57 4.45 4.77
74.4 67.9 85.8
47.4 60.1 37.6
5.09 4.97 5.32
69.3 62.3 82.0
43.7 56.2 33.6
5.68 5.53 5.90
64.6 58.3 75.7
38.4 50.2 29.1
6.29 6.16 6.53
59.6 54.5 68.8
33.3 43.8 24.3
6.95 6.83 7.16
52.1 49.5 59.2
27.5 38.4 20.9
7.72 7.58 7.92
75 Dry Bulb
65.3 Wet Bulb
(60% Relative)
2400 1800 2100
28.62 27.12 27.86
5.14 –1.85 –0.03
4.44 4.49 4.49
29.18 27.81 28.52
5.18 –1.38 0.34
4.50 4.55 4.55
29.74 28.51 29.17
5.22 –0.91 0.70
4.57 4.62 4.62
30.86 29.89 30.47
5.29 0.04 1.43
4.69 4.75 4.75
31.98 31.27 31.77
5.37 0.98 2.15
4.82 4.89 4.89
33.12 32.66 33.07
5.44 1.92 2.88
4.95 5.02 5.02
sensible capacity (Btuh)
1.10 x cfm
)
lwb
total capacity (Btuh)
4.5 x cfm
67 62
82.7 77.0
58.1 70.2
4.61 4.51
78.2 72.3
54.3 66.7
5.17 5.04
72.8 67.5
49.2 62.9
5.73 5.60
67.0 62.4
45.2 56.2
6.36 6.24
60.8 57.5
41.4 49.7
7.01 6.92
52.8 53.1
34.6 44.4
7.78 7.70
2400
28.51
1.58
4.49
29.13
1.85
4.55
29.74
2.12
4.62
30.97
2.65
4.75
32.20
3.19
4.89
33.43
3.72
5.02