Bryant COMMERCIAL SINGLE PACKAGE ROOFTOP GAS HEAT/ELECTRIC COOLING 581B User Manual page 25

COOLING CAPACITIES, UNITS WITH PERFECT HUMIDITY™ OPTION (cont)
581B120 (10 TONS)
Temp (F)
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
581B150 (12 1 / TONS)
2
Temp (F)
Air Ent
Condenser
(Edb)
72
TC 156.3
75 SHC 66.6
kW 9.28
TC 147.6
85 SHC 58.7
kW 10.29
TC 138.9
95 SHC 50.8
kW 11.29
TC 129.1
105 SHC 42.1
kW 12.59
TC 119.2
115 SHC 33.5
kW 13.90
TC 109.4
125 SHC 24.8
kW 15.20
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)
Temp (F) Air Entering Evaporator — Cfm/BF
3000/0.03
Temp (F) Air Entering Evaporator — Ewb
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
Temp (F) Air Entering Evaporator — Cfm/BF
3750/0.08
Temp (F) Air Entering Evaporator — Ewb
67 62 72
144.2 132.3 160.0
87.6 112.1 72.5
8.98 8.59 9.35
136.2 123.7 150.7
80.0 103.8 63.5
9.93 9.58 10.36
128.2 115.1 141.4
72.3 95.5 54.4
10.87 10.57 11.37
117.8 105.8 131.7
63.5 86.5 45.4
12.14 11.82 12.67
107.3 96.4 122.1
54.8 77.5 36.4
13.40 13.08 13.98
96.9 87.1 112.4
46.0 68.5 27.4
14.67 14.33 15.28
3200/0.03
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
4300/0.09
67 62 72
148.4 136.2 162.8
94.8 121.3 76.9
9.08 8.80 9.40
140.1 127.2 154.1
86.5 112.2 68.7
10.08 9.77 10.40
131.8 118.3 145.3
78.1 103.2 60.5
11.08 10.74 11.40
121.0 108.7 134.8
69.0 93.9 51.2
12.34 11.96 12.70
110.2 99.0 124.2
59.8 84.7 41.9
13.59 13.18 14.00
99.4 89.3 113.7
50.7 75.5 32.6
14.85 14.40 15.30
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).
25
4000/0.04
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
5000/0.11
67 62 72
150.6 138.2 169.0
99.6 127.5 87.0
9.18 8.9 9.43
140.8 127.9 161.1
91.0 118.1 77.7
10.34 10.03 10.45
131.0 117.6 153.1
82.3 108.7 68.5
11.50 11.1 11.46
119.9 107.7 140.9
74.2 101.3 57.7
12.67 12.28 12.79
108.8 97.8 128.7
66.1 93.8 46.8
13.83 13.41 14.11
97.7 87.8 116.5
58.0 86.4 36.0
15.00 14.54 15.44
sensible capacity (Btuh)
1.10 x cfm
total capacity (Btuh)
4.5 x cfm
5000/0.04
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
6250/0.13
67 62
157.5 145.6
115.5 142.7
9.18 8.93
148.0 135.4
107.8 133.2
10.18 9.88
138.4 125.1
100.0 123.7
11.17 10.83
126.9 115.9
90.2 113.6
12.46 12.08
115.3 106.7
80.5 103.5
13.75 13.33
103.8 97.5
70.7 93.5
15.04 14.58