Bryant COMMERCIAL SINGLE PACKAGE ROOFTOP GAS HEAT/ELECTRIC COOLING 581B User Manual page 24

COOLING CAPACITIES, UNITS WITH PERFECT HUMIDITY™ OPTION (cont)
581B090 (7
Temp (F)
Air Ent
Condenser
(Edb)
75
85
95
105
115
125
581B102 (8 1 / TONS)
2
Temp (F)
Air Ent
Condenser
(Edb)
72
TC 112.4
75
SHC 49.1
kW 6.10
TC 105.7
85
SHC 43.6
6.92
kW
TC 98.9
95
SHC 38.0
kW 7.73
TC 91.8
105
SHC 32.6
kW 8.80
TC 84.7
115
SHC 27.2
kW 9.86
TC 77.6
125
SHC 21.8
kW 10.93
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
PERFORMANCE DATA (cont)
1 / TONS)
2
Temp (F) Air Entering Evaporator — Cfm/BF
2250/0.10
72 67
TC 98.4 91.1
SHC 44.5 55.4
kW 5.05 4.96
TC 94.2 85.8
SHC 39.7 51.3
kW 5.74 5.65
TC 89.9 80.5
SHC 34.8 47.2
kW 6.42 6.33
TC 84.6 75.3
SHC 30.0 42.5
kW 7.26 7.16
TC 79.2 70.1
SHC 25.2 37.8
kW 8.10 7.99
TC 72.8 64.5
SHC 20.1 33.4
9.10 8.94
kW
Temp (F) Air Entering Evaporator — Cfm/BF
2550/0.08
67 62 72
102.2 92.6 115.2
62.4 75.0 52.9
5.96 5.86 6.18
95.7 86.5 110.0
57.1 69.9 47.8
6.78 6.63 6.97
89.1 80.4 104.7
51.7 64.8 42.7
7.59 7.40 7.75
82.3 73.8 97.3
46.3 59.5 37.0
8.64 8.47 8.80
75.5 67.3 89.8
40.9 54.2 31.4
9.69 9.53 9.86
68.7 60.7 82.4
35.5 48.9 25.7
10.74 10.60 10.91
3000/0.11
Temp (F) Air Entering Evaporator — Ewb
62 72 67
81.1 103.7 97.9 91.8
67.0 50.4 65.4 80.5
4.87 5.09 5.04 4.97
76.9 100.3 92.4 85.2
62.7 46.2 58.3 75.7
5.55 5.81 5.75 5.64
72.6 96.9 86.8 78.6
58.3 41.9 51.2 71.0
6.22 6.52 6.45 6.31
68.0 91.6 81.3 73.4
53.9 36.9 49.3 66.4
7.05 7.36 7.25 7.15
63.3 86.2 75.8 68.1
49.4 31.9 47.4 61.9
7.87 8.20 8.05 7.98
57.2 78.0 69.8 62.3
44.1 25.4 42.5 56.5
8.83 9.23 9.05 8.95
3000/0.09
Temp (F) Air Entering Evaporator — Ewb
67 62 72
106.4 96.4 119.6
68.5 82.3 56.2
6.05 5.95 6.18
100.6 91.0 114.0
62.8 76.9 50.7
6.90 6.75 7.01
94.8 85.5 108.4
57.0 71.4 45.2
7.75 7.56 7.84
87.6 78.6 100.4
51.9 66.8 39.3
8.76 8.58 8.89
80.5 71.7 92.5
46.9 62.2 33.4
9.77 9.61 9.95
73.3 64.8 84.5
41.8 57.6 27.5
10.78 10.64 11.00
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
t ldb = t edb –
t lwb = Wet-bulb temperature corresponding to enthalpy of air
leaving evaporator coil (h lwb )
h lwb = h ewb –
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).
24
3750/0.14
62 72 67 62
105.8 101.3 94.1
54.5 72.4 89.5
5.16 5.04 4.99
103.5 96.8 89.0
50.6 68.2 84.3
5.89 5.74 5.70
101.1 92.2 83.8
46.6 63.9 79.1
6.62 6.43 6.40
94.5 86.3 78.4
41.4 59.2 73.8
7.46 7.29 7.23
87.9 80.3 72.9
36.1 54.4 68.5
8.30 8.14 8.05
81.6 73.2 69.2
31.1 48.9 64.7
9.26 9.10 8.99
3400/0.11
67 62 72
110.3 101.3 127.6
73.3 89.5 62.8
6.05 5.95 6.18
103.7 94.6 118.2
67.9 82.8 74.7
6.85 6.75 7.01
97.0 87.9 108.8
62.4 76.2 86.5
7.65 7.54 7.84
89.8 80.8 102.3
56.7 70.0 68.6
8.69 8.59 8.93
82.5 73.8 95.8
51.0 63.8 50.6
9.74 9.65 10.01
75.3 66.7 89.3
45.3 57.6 32.7
10.78 10.70 11.10
sensible capacity (Btuh)
1.10 x cfm
total capacity (Btuh)
4.5 x cfm
4250/0.13
67 62
117.6 108.0
83.3 101.7
6.10 6.00
110.9 101.2
77.7 94.8
6.91 6.80
104.1 94.3
72.0 87.9
7.71 7.60
95.3 85.8
65.5 80.9
8.77 8.67
86.6 77.4
59.1 73.9
9.84 9.75
77.8 68.9
52.6 66.9
10.90 10.82