Bryant 581A, 581B, 579F, 581C COOLING CAPACITIES STANDARD UNITS

239
PERFORMANCE DATA
COOLING CAPACITIES — STANDARD UNITS
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
tlwb = Wet-bulb temperature corresponding to enthalpy of air leaving evapo-
rator coil (hlwb)
Where: hewb = Enthalpy of air entering evaporator coil
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.
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
4. Use chart below for bypass factor.
581A155 (12 Tons)
Temp (F)
Air Ent
Cond
Evap Air — Cfm/BF
3600/0.01 4375/0.01 5000/0.01
Evap Air — Ewb (F)
54 58 62 67 72 76 80 54 58 62 67 72 76 80 54 58 62 67 72 76 80
60 TC 152 156 161 174 189 201 213 161 164 167 180 195 207 218 169 171 172 184 199 211 222 SHC 152 144 135 114 92.9 75.4 57.5 1 61 156 150 125 99.6 78.7 57.5 1 69 166 162 134 105 81.3 57.4
kW 7.567.657.748.018.338.6 8.867.767.827.888.148.468.728.977.927.957.988.248.558.829.06
70 TC 148 152 156 169 183 195 206 157 160 162 174 189 200 211 165 166 167 179 193 204 214
SHC 148 141 133 112 90.6 73.2 55.4 1 57 153 148 123 97.3 76.5 55.3 1 65 162 160 132 103 79.1 55.3
kW 8.58.588.678.979.269.53 9.8 8.78.758.819.079.399.669.918.868.898.919.169.499.769.99
75 TC 146 150 154 166 181 192 204 155 158 160 172 186 197 208 163 164 164 176 189 201 212
SHC 146 139 132 111 89.7 72.2 54.6 1 55 151 146 122 96.2 75.5 54.6 1 63 161 158 131 101 78.1 54.5
kW 9.02 9.1 9.18 9.45 9.8 10.1 10.4 9.22 9.27 9.31 9.58 9.91 10.2 10.5 9.39 9.41 9.43 9.68 9.99 10.3 10.6
85 TC 142 145 149 161 175 186 196 151 153 154 166 179 190 200 158 159 159 170 183 194 203
SHC 142 136 129 109 87.4 70 52.4 151 147 144 119 93.9 73.2 52.3 158 157 155 128 99.1 75.8 52.2
kW 10.1 10.2 10.3 10.6 10.9 11.2 11.5 10.3 10.4 10.4 10.7 11 11.3 11.6 10.5 10.5 10.5 10.8 11.1 11.4 11.7
95 TC 138 141 143 155 168 179 189 147 148 149 160 173 183 192 153 153 154 164 177 187 195
SHC 138 133 127 106 85 67.7 50.1 147 144 141 117 91.6 70.9 50 153 153 152 126 96.9 73.5 49.9
kW 11.4 11.4 11.5 11.8 12.2 12.4 12.7 11.6 11.6 11.6 11.9 12.3 12.6 12.8 11.8 11.8 11.8 12 12.4 12.7 12.9
105 TC 134 136 138 149 162 172 181 141 142 143 153 166 176 184 148 148 148 157 169 179 186
SHC 134 129 124 104 82.4 65.3 47.7 141 139 137 114 89 68.4 47.5 148 148 148 123 94.3 70.9 47.4
kW 12.7 12.8 12.8 13.2 13.5 13.8 14.1 12.9 13 13 13.3 13.6 13.9 14.2 13.1 13.1 13.1 13.4 13.7 14 14.3
115 TC 129 130 132 143 155 164 172 136 137 138 146 158 168 175 142 142 142 149 161 171 177
SHC 129 125 121 101 79.8 62.7 45.1 1 36 135 133 111 86.3 65.9 45 142 142 142 120 91.6 68.4 45
kW 14.2 14.2 14.3 14.6 15 15.3 15.6 14.4 14.4 14.5 14.7 15.1 15.5 15.7 14.6 14.6 14.6 14.8 15.2 15.6 15.7
125 TC 124 125 126 136 147 156 163 131 131 132 140 150 159 165 136 136 136 142 153 162 167
SHC 124 121 118 98.2 77 60.1 42.5 131 130 128 109 83.5 63.2 42.5 136 136 136 117 88.7 65.7 42.4
kW 15.8 15.8 15.9 16.2 16.6 17 17.2 16.1 16.1 16.1 16.4 16.7 17.1 17.3 16.3 16.2 16.2 16.4 16.8 17.2 17.4
581A155 (12 Tons) (cont)
Temp (F)
Air Ent
Cond
Evap Air — Cfm/BF
5625/0.02 6250/0.02
Evap Air — Ewb (F)
54 58 62 67 72 76 80 54 58 62 67 72 76 80
60 TC 175 175 176 187 202 214 224 180 180 180 190 204 216 226 SHC 175 173 171 142 110 83.8 57.3 180 180 180 151 115 86.2 57.2
kW 8.03 8.05 8.07 8.3 8.61 8.87 9.1 8.14 8.15 8.16 8.36 8.66 8.93 9.14
70 TC 170 171 171 181 195 207 216 175 176 176 184 198 209 218
SHC 170 169 168 140 108 81.5 55.2 175 176 176 148 113 84 55.1
kW 8.98 8.99 9.01 9.23 9.55 9.81 10 9.09 9.1 9.11 9.3 9.61 9.87 10.1
75 TC 168 168 169 179 192 203 213 173 173 173 181 195 206 215
SHC 168 167 166 139 107 80.5 54.4 173 173 173 147 112 83 54.3
kW 9.59.519.529.7510.110.310.69.629.629.629.8110.110.410.6
85 TC 163 163 164 172 185 196 205 168 168 168 175 188 198 206
SHC 163 162 162 136 104 78.2 52.2 168 168 168 145 109 80.6 52.1
kW 10.6 10.6 10.6 10.9 11.2 11.5 11.7 10.7 10.7 10.8 10.9 11.2 11.5 11.8
95 TC 158 158 158 166 178 189 196 162 162 162 168 180 190 197
SHC 158 157 157 134 102 75.9 49.8 162 162 162 142 107 78.3 49.7
kW 11.9 11.9 11.9 12.1 12.4 12.7 12.9 12 12 12 12.1 12.5 12.8 13
105 TC 152 152 152 159 171 181 187 157 157 157 161 173 182 188
SHC 152 152 152 131 99.3 73.3 47.4 157 157 157 139 104 75.7 47.4
kW 13.2 13.2 13.2 13.4 13.8 14.1 14.3 13.4 13.4 13.4 13.5 13.9 14.2 14.4
115 TC 146 146 146 151 163 172 177 150 150 150 153 165 174 178
SHC 146 146 146 128 96.6 70.7 44.9 150 150 150 136 102 73.1 44.8
kW 14.7 14.7 14.7 14.9 15.3 15.6 15.8 14.9 14.9 14.9 14.9 15.4 15.7 15.8
125 TC 140 140 140 144 155 163 167 144 144 144 146 156 164 168
SHC 140 140 140 125 93.7 67.9 42.4 144 144 144 133 98.7 70.2 42.3
kW 16.4 16.4 16.4 16.5 16.9 17.2 17.4 16.5 16.5 16.5 16.6 17 17.3 17.4
BF — Bypass Factor
Edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW — Compressor Motor Power Input
ldb — Leaving Dry-Bulb
lwb — Leaving Wet-Bulb
SHC — Sensible Heat Capacity (1000 Btuh) Gross
TC — Total Capacity (1000 Btuh) Gross
tldb = tedb – sensible capacity (Btuh)
1.10 x cfm
hlwb = hewb – total capacity (Btuh)
4.5 x cfm
BYPASS
FACTOR
(BF)
ENTERING AIR DRY-BULB TEMP (F)
79 78 77 76 75 under 75
81 82 83 84 85 over 85
Correction Factor
.05 1.04 2.07 3.11 4.14 5.18 Use formula
shown below.
.10 .98 1.96 2.94 3.92 4.90
.20 .87 1.74 2.62 3.49 4.36
.30 .76 1.53 2.29 3.05 3.82
CFM ENTERING WET-BULB (F) 54 58 62 67 72 76 80
Bypass Factor
3600 0.355 0.158 0.054 0.038 0.049 0.000 0.000
4375 0.439 0.255 0.112 0.043 0.057 0.000 0.000
5000 0.486 0.314 0.126 0.054 0.037 0.000 0.000
5625 0.525 0.360 0.174 0.066 0.073 0.000 0.000
6250 0.551 0.410 0.202 0.080 0.079 0.000 0.000
581A155, 180