Bryant 581A, 581B, 579F, 581C - page 241

241
581A155, 180
PERFORMANCE DATA (cont)
COOLING CAPACITIES — STANDARD UNITS (cont)
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.
581A210 (18 Tons)
Temp (F)
Air Ent
Cond
Evap Air — Cfm/BF
5400/0.05 6300/0.06 7200/0.07
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 202 206 211 229 248 263 279 212 215 218 235 254 269 285 220 221 223 239 259 273 289 SHC 202 193 184 155 124 99.3 74.7 212 205 199 166 131 103 74.9 220 216 213 177 138 106 75
kW 10.2 10.3 10.4 10.6 10.8 11 11.2 10.4 10.4 10.4 10.7 10.9 11.1 11.3 10.5 10.5 10.5 10.7 11 11.2 11.4
70 TC 197 202 206 223 242 256 272 207 209 212 228 247 262 277 215 216 217 233 252 267 282
SHC 197 189 181 152 122 97 72.5 207 202 196 163 129 101 72.7 215 212 210 174 135 104 72.8
kW 11.4 11.5 11.5 11.8 12 12.2 12.5 11.6 11.6 11.6 11.9 12.1 12.3 12.6 11.7 11.7 11.7 11.9 12.2 12.4 12.6
75 TC 195 199 203 219 238 253 268 204 206 209 225 244 258 273 212 213 214 229 248 263 277
SHC 195 187 180 150 120 95.8 71.3 204 199 195 162 127 99.3 71.4 212 210 208 173 134 103 71.5
kW 12.1 12.2 12.2 12.5 12.7 13 13.2 12.3 12.3 12.3 12.6 12.8 13 13.3 12.4 12.4 12.4 12.6 12.9 13.1 13.3
85 TC 190 193 196 213 231 246 260 199 201 202 218 236 251 264 206 207 208 222 240 255 268
SHC 190 183 177 148 118 93.4 68.8 199 195 191 159 125 96.9 68.9 206 205 204 170 131 100 69
kW 13.5 13.5 13.6 13.8 14.1 14.4 14.6 13.6 13.7 13.7 13.9 14.2 14.5 14.7 13.7 13.8 13.8 14 14.3 14.5 14.8
95 TC 184 187 190 205 222 236 250 193 194 195 210 227 241 254 200 200 201 214 231 245 258
SHC 184 179 173 144 114 90.2 65.9 193 190 187 156 121 93.7 66.1 200 199 199 167 128 97.1 66.2
kW 15 15 15.1 15.4 15.7 15.9 16.2 15.1 15.2 15.2 15.5 15.8 16 16.3 15.3 15 .3 15.3 15.5 15.8 16.1 16.3
105 TC 178 180 182 197 213 228 240 186 187 188 201 217 232 244 193 193 193 205 221 235 247
SHC 178 173 169 141 111 87.3 62.9 186 184 183 152 118 90.8 63.1 193 193 193 163 124 94.1 63.2
kW 16.6 16.7 16.7 17 17.3 17.7 17.9 16.8 16.8 16.8 17.1 17.4 17.8 18 16.9 16.9 16.9 17.2 17.5 17.8 18
115 TC 171 172 174 188 203 217 228 179 179 179 192 207 221 232 185 185 185 195 210 224 235
SHC 171 168 165 137 107 83.6 59.6 179 178 178 149 114 87.1 59.7 185 185 185 159 121 90.4 59.9
kW 18.4 18.4 18.4 18.8 19.1 19.4 19.7 18.6 18.6 18.6 18.9 19.2 19.5 19.8 18.7 18.7 18.7 19 19.3 19.6 19.9
125 TC 164 165 165 178 192 205 216 171 171 171 182 196 208 219 177 177 177 185 199 211 222
SHC 164 162 160 134 104 79.8 56.1 171 171 171 145 110 83.2 56.3 177 177 177 155 117 86.5 56.4
kW 20.2 20.3 20.3 20.6 21 21.3 21.6 20.4 20.4 20.4 20.8 21.1 21.4 21.7 20.6 20.6 20.6 20.8 21.2 21.5 21.8
581A210 (18 Tons) (cont)
Temp (F)
Air Ent
Cond
Evap Air — Cfm/BF
8100/0.08 9000/0.09
Evap Air — Ewb (F)
54 58 62 67 72 76 80 54 58 62 67 72 76 80
60 TC 227 227 228 243 262 277 293 233 233 233 246 265 280 295 SHC 227 226 224 187 144 109 75.1 233 233 233 198 151 113 75.1
kW 10.5 10.6 10.6 10.7 11 11.2 11.4 10.6 10.6 10.6 10.8 11 11.3 11.5
70 TC 222 222 222 236 255 271 284 228 228 227 239 258 272 287
SHC 222 221 221 185 142 107 72.8 228 228 227 195 148 110 72.9
kW 11.8 11.8 11.8 12 12.2 12.5 12.7 11.9 11.9 11.8 12 12.3 12.5 12.7
75 TC 219 219 219 232 251 266 280 225 224 224 235 254 268 282
SHC 219 218 218 183 140 106 71.6 225 224 224 193 147 109 71.7
kW 12.5 12.5 12.5 12.7 12.9 13.2 13.4 12.6 12.5 12.5 12.7 13 13.2 13.4
85 TC 213 213 213 225 243 258 271 218 218 218 228 245 260 273
SHC 213 213 213 180 138 103 69.1 218 218 218 190 144 107 69.2
kW 13.8 13.8 13.8 14.1 14.3 14.6 14.8 13.9 13.9 13.9 14.1 14.4 14.6 14.8
95 TC 206 206 206 217 234 248 260 211 211 211 220 236 250 262
SHC 206 206 206 177 134 100 66.3 211 211 211 187 141 103 66.4
kW 15.4 15.4 15.4 15.6 15.9 16.1 16.4 15.5 15.5 15.5 15.6 15.9 16.2 16.4
105 TC 199 199 199 208 224 238 249 203 203 204 210 226 240 251
SHC 199 199 199 173 131 97.2 63.2 203 203 204 183 137 100 63.4
kW 17 17.1 17.1 17.3 17.6 17.9 18.1 17.2 17.2 17.2 17.3 17.6 17.9 18.1
115 TC 191 191 191 198 213 226 237 195 195 195 201 215 228 238
SHC 191 191 191 169 127 93.5 60 195 195 195 179 133 96.6 60
kW 18.8 18.8 18.8 19 19.3 19.7 19.9 18.9 18.9 18.9 19.1 19.4 19.7 19.9
125 TC 182 182 182 188 201 213 224 186 186 186 190 203 215 225
SHC 182 182 182 165 123 89.6 56.5 186 186 186 174 129 92.6 56.6
kW 20.7 20.7 20.7 20.9 21.2 21.6 21.9 20.9 20.9 20.9 21 21.3 21.6 21.9
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
5400 0.424 0.238 0.125 0.120 0.138 0.000 0.000
6300 0.478 0.304 0.153 0.132 0.145 0.000 0.000
7200 0.525 0.364 0.190 0.144 0.153 0.000 0.000
8100 0.562 0.414 0.231 0.156 0.162 0.000 0.000
9000 0.594 0.456 0.281 0.168 0.170 0.000 0.000