Bryant 579F User Manual page 243

581A300 (25 Tons)
Temp (F)
Air Ent
Cond
54 58 62
TC 287 296 304
60 SHC 287 274 261
kW 15.5 15.7 15.9
TC 279 286 293
SHC 279 267 255
70
kW 17 17.2 17.3
TC 275 281 287
75 SHC 275 264 252
kW 17.9 18.1 18.2
TC 267 272 277
85 SHC 267 257 247
kW 19.8 19.9 20
TC 259 263 267
95 SHC 259 251 242
kW 22.1 22.2 22.3
TC 253 256 260
SHC 253 246 239
105
kW 24.9 25 25.1
TC 246 249 252
SHC 246 240 235
115
kW 28.1 28.2 28.3
TC 238 240 242
125 SHC 238 234 230
kW 31.6 31.7 31.7
581A300 (25 Tons) (cont)
Temp (F)
Air Ent
Cond
54 58
TC 322 324
60 SHC 322 317
kW 16.3 16.4
TC 311 312
70 SHC 311 308
kW 17.8 17.8
TC 306 307
75 SHC 306 304
kW 18.7 18.7
TC 295 296
85 SHC 295 295
kW 20.5 20.5
TC 286 286
SHC 286 286
95
kW 22.7 22.7
TC 277 277
SHC 277 277
105
kW 25.4 25.4
TC 268 269
115 SHC 268 269
kW 28.5 28.5
TC 260 259
125 SHC 260 259
kW 32 32
LEGEND
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
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
sensible capacity (Btuh)
t ldb = t edb –
1.10 x cfm
t lwb = Wet-bulb temperature corresponding to enthalpy of air leaving evapo-
rator coil (h lwb )
total capacity (Btuh)
h lwb = h ewb –
4.5 x cfm
Where: h ewb = 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.
PERFORMANCE DATA (cont)
COOLING CAPACITIES — STANDARD UNITS (cont)
7,500/0.05
67 72 76 80 54
331 359 385 408 297
220 178 145 110 297
16.5 17.3 17.9 18.6 15.7
318 345 367 392 288
214 173 139 105 288
18 18.7 19.3 20 17.2
311 338 360 383 283
212 170 136 102 283
18.8 19.5 20.1 20.8 18.1
299 324 345 366 274
207 165 131 97.3 274
20.6 21.2 21.8 22.4 20
288 311 331 350 267
202 160 126 92.5 267
22.8 23.4 23.9 24.5 22.3
279 301 318 335 260
198 156 122 87.9 260
25.4 25.9 26.4 26.9 25.1
270 291 305 320 253
195 152 118 83.5 253
28.6 29 29.3 29.6 28.3
259 279 293 305 245
190 148 114 79.2 245
32 32.4 32.6 32.9 31.8
10,750/0.08
62 67 72
327 351 380
313 260 203
16.4 17 17.8
314 336 364
305 255 198
17.9 18.4 19.2
308 329 356
302 252 195
18.7 19.3 20
297 315 340
294 246 189
20.5 21 21.7
286 303 327
286 241 185
22.7 23.1 23.8
277 290 312
277 236 179
25.4 25.7 26.2
269 281 300
269 232 176
28.5 28.7 29.2
259 269 287
259 227 171
32 32.1 32.5
Evap Air — Cfm/BF
8,250/0.06
Evap Air — Ewb (F)
58 62 67 72 76
304 310 336 367 390
285 273 229 185 148
15.9 16 16.7 17.4 18.1
293 298 323 350 372
278 268 224 178 142
17.3 17.5 18.1 18.8 19.4
288 293 316 343 365
274 265 221 176 139
18.2 18.4 18.9 19.7 20.3
278 282 304 329 350
267 259 216 171 134
20.1 20.1 20.7 21.4 22
270 273 293 315 335
261 255 212 166 129
22.4 22.5 22.9 23.5 24
262 264 282 304 322
255 250 207 162 125
25.1 25.1 25.5 26 26.5
255 256 274 294 309
250 246 204 158 121
28.3 28.3 28.6 29 29.4
246 246 262 281 295
243 240 199 153 116
31.8 31.8 32.1 32.4 32.7
Evap Air — Cfm/BF
Evap Air — Ewb (F)
76 80 54 58
404 429 332 333
157 111 332 330
18.5 19.2 16.6 16.6
386 408 320 320
151 105 320 320
19.8 20.5 18 18
378 398 315 315
149 103 315 314
20.6 21.3 18.9 18.9
362 379 303 303
144 97.3 303 303
22.3 22.8 20.7 20.7
344 364 293 293
138 93 293 293
24.3 24.9 22.9 22.9
329 347 284 284
133 88.3 284 284
26.7 27.2 25.5 25.6
315 332 274 274
129 84.4 274 274
29.5 30 28.6 28.6
300 316 265 265
125 80 265 265
32.8 33.2 32.1 32.1
BYPASS
FACTOR
(BF)
.05
.10
.20
.30
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
4. Use chart below for bypass factor.
CFM 54
7,500 0.407
8,250 0.443
9,500 0.494
10,750 0.536
12,000 0.571
243
9,500/0.07
80 54 58 62 67
414 311 315 319 345
110 311 303 294 246
18.7 16 16.1 16.2 16.9
397 301 303 306 329
105 301 294 287 239
20.1 17.5 17.6 17.7 18.3
388 296 298 300 323
103 296 290 284 237
20.9 18.4 18.5 18.5 19.1
370 286 287 289 311
97.3 286 282 278 232
22.6 20.2 20.3 20.3 20.9
354 278 279 281 299
92.5 278 276 273 227
24.6 22.6 22.6 22.6 23.1
338 269 270 270 287
87.8 269 268 267 222
26.9 25.2 25.2 25.2 25.6
323 262 262 262 277
83.4 262 261 261 218
29.7 28.4 28.4 28.4 28.7
310 253 253 253 266
79.7 253 253 253 214
33 31.9 31.9 31.9 32.1
12,000/0.09
62 67 72
334 357 386
329 276 212
16.6 17.2 18
321 341 368
319 269 206
18 18.5 19.3
315 333 360
314 266 203
18.9 19.4 20.1
303 319 344
303 260 198
20.7 21.1 21.8
294 307 330
294 255 193
22.9 23.2 23.9
285 295 314
285 250 188
25.6 25.8 26.3
275 283 303
275 245 184
28.6 28.8 29.2
264 271 289
264 240 179
32.1 32.2 32.5
ENTERING AIR DRY-BULB TEMP (F)
79 78 77 76 75
81 82 83 84 85
Correction Factor
1.04 2.07 3.11 4.14 5.18
.98 1.96 2.94 3.92 4.90
.87 1.74 2.62 3.49 4.36
.76 1.53 2.29 3.05 3.82
ENTERING WET-BULB (F)
58 62 67 72
Bypass Factor
0.208 0.097 0.104 0.123
0.256 0.110 0.112 0.128
0.324 0.138 0.123 0.136
0.380 0.181 0.134 0.145
0.427 0.232 0.145 0.154
72 76 80
375 398 421
194 152 111
17.6 18.3 19
357 381 403
188 147 105
19 19.7 20.3
349 372 394
185 144 103
19.8 20.5 21.1
334 355 375
180 139 97.3
21.5 22.1 22.7
322 340 358
175 134 92.4
23.6 24.2 24.7
308 326 342
171 129 87.7
26.1 26.6 27.1
298 312 328
167 125 83.9
29.1 29.4 29.9
284 298 313
162 120 79.9
32.5 32.7 33.1
76 80
410 432
162 111
18.6 19.2
392 414
156 106
20 20.6
383 404
153 103
20.8 21.4
365 385
148 97.9
22.4 23
347 366
142 92.8
24.4 24.9
331 352
137 88.7
26.7 27.3
317 333
133 84
29.5 30
302 318
129 80.1
32.8 33.3
under 75
over 85
Use formula
shown below.
76 80
0.000 0.000
0.000 0.000
0.000 0.000
0.000 0.000
0.000 0.000