Bryant 579F User Manual page 189

579F300 (25 Tons)
Temp (F)
Air Entering
Condenser
(Edb)
54/0.44 58/0.26
TC — 256
75 SHC — 243
kW — 19.3
TC 249 251
85 SHC 249 238
kW 21.3 21.3
TC 244 245
95 SHC 244 230
kW 23.6 23.5
TC 237 238
105 SHC 237 233
kW 25.9 25.9
TC 229 231
115 SHC 229 225
kW 28.6 28.6
TC 228 230
117 SHC 228 225
kW 29.1 29.1
TC 226 226
120 SHC 226 225
kW 30.0 30.0
579F300 (25 Tons) (cont)
Temp (F)
Air Entering
Condenser
(Edb)
54/0.53 58/0.37
TC 277 276
75 SHC 277 269
kW 19.8 19.5
TC 271 272
85 SHC 271 264
kW 22.2 21.9
TC 263 263
95 SHC 263 263
kW 24.1 24.1
TC 255 255
105 SHC 255 255
kW 26.5 26.5
TC 247 246
115 SHC 247 246
kW 29.1 29.2
TC 244 244
117 SHC 244 244
kW 29.7 29.7
TC 241 242
120 SHC 241 242
kW 30.6 30.6
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 = t –
ldb edb
1.10 x cfm
Wet-bulb temperature corresponding to enthalpy of air
t =
lwb
leaving evaporator coil (h
total capacity (Btuh)
h = h –
lwb ewb
4.5 x cfm
Where: h = Enthalpy of air entering evaporator coil
ewb
PERFORMANCE DATA — 579F (cont)
COOLING CAPACITIES (cont)
7,000
62/0.13 67/0.12 72/0.12 76/0.19
270 298 325
229 198 164
20.0 20.3 21.0
265 289 315
226 194 160
21.7 22.4 23.1
257 279 306
223 190 156
24.1 24.6 25.6
247 269 293
218 185 152
26.3 27.0 27.8
237 258 283
213 181 148
28.9 29.6 30.3
236 256 279
212 180 147
29.4 30.2 31.0
232 252 276
211 179 145
30.3 30.9 31.8
9,000
62/0.18 67/0.15 72/0.14 76/0.17
286 310 336
261 221 178
20.0 20.6 21.3
277 300 326
257 217 175
22.1 22.7 23.4
268 289 316
251 213 171
24.3 24.9 25.9
258 278 302
246 208 166
26.6 27.3 28.1
249 267 290
239 204 162
29.3 30.0 30.8
247 265 288
237 203 161
29.8 30.4 31.3
244 261 —
235 201 —
30.7 31.3 —
)
lwb
Evaporator Air Quantity — Cfm
Evaporator Air — Ewb (F)/BF
80/0.01 54/0.49 58/0.32
349 370 266 268
133 106 266 251
21.6 22.2 19.5 19.6
340 361 260 262
130 103 260 254
24.3 24.4 21.6 21.6
328 349 254 256
127 99 254 249
26.2 26.7 23.8 23.9
315 336 246 247
122 95 246 245
28.5 29.2 26.3 26.3
302 322 238 239
119 91 238 239
31.2 31.9 28.9 28.9
299 — 237 237
118 — 237 237
31.7 — 29.4 29.5
— — 234 234
— — 234 234
— — 30.3 30.3
Evaporator Air Quantity — Cfm
Evaporator Air — Ewb (F)/BF
80/0.00 54/0.57 58/0.41
361 385 286 284
142 108 286 284
22.0 22.6 20.0 20.2
349 373 278 278
139 104 278 278
24.1 24.8 22.1 22.1
337 360 270 270
135 100 270 270
26.4 27.1 24.4 24.4
326 346 261 262
132 96 261 262
29.0 29.6 26.8 26.8
311 — 253 253
127 — 253 253
31.5 — 29.3 29.3
308 — 251 251
126 — 251 251
32.1 — 30.0 30.0
— — 248 248
— — 248 248
— — 30.8 30.8
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.
BYPASS
79
FACTOR
81
(BF)
0.05 1.04
0.10 0.98
0.20 0.87
0.30 0.76
0.40 0.65
0.50 0.55
0.60 0.44
0.70 0.33
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
189
8,000
62/0.15 67/0.14 72/0.13 76/0.17
280 304 324 352
246 209 168 137
19.9 20.5 20.9 21.8
272 294 321 344
243 205 167 135
22.0 22.5 23.3 23.9
262 284 310 332
238 201 163 131
24.1 24.8 25.5 26.2
253 274 298 319
233 197 159 127
26.5 27.2 28.0 28.7
243 264 286 306
228 193 155 123
29.1 29.7 30.6 31.4
241 260 283 304
227 192 154 122
29.6 30.4 31.2 31.9
238 257 280 —
225 190 152 —
30.5 31.1 32.0 —
10,000
62/0.23 67/0.16 72/0.15 76/0.17
291 314 341 365
274 232 186 147
20.2 20.8 21.5 22.1
282 304 330 354
269 228 182 143
22.2 22.8 23.6 24.2
273 293 319 341
262 223 177 139
24.4 25.1 25.8 26.5
264 282 306 328
254 219 173 135
26.9 27.5 28.3 29.0
255 270 293 315
245 214 168 131
29.6 30.1 30.9 31.7
253 268 291 —
243 213 168 —
30.0 30.6 31.4 —
250 264 — —
239 212 — —
31.0 31.5 — —
ENTERING AIR DRY-BULB TEMP (F)
78 77 76 75
82 83 84 85
Correction Factor
2.07 3.11 4.14 5.18
1.96 2.94 3.92 4.91
1.74 2.62 3.49 4.36
1.53 2.29 3.05 3.82
1.31 1.96 2.62 3.27
1.09 1.64 2.18 2.73
0.87 1.31 1.74 2.18
0.65 0.98 1.31 1.64
80/0.00
379
107
22.4
367
104
24.6
355
100
26.9
343
96
29.5
328
91
32.1
—
—
—
—
—
—
80/0.00
390
108
22.7
378
105
24.9
364
101
27.2
352
97
29.8
—
—
—
—
—
—
—
—
—
under 75
over 85
Use formula
shown below.