Bryant 581A/B Product Information Manual page 156

579F240 (20 Tons)
Temp (F)
Air Entering
Condenser
(Edb)
54/0.48 58/0.31
TC 217 222
75 SHC 217 199
kW 15.1 15.2
TC 212 217
85 SHC 212 194
kW 16.9 17.2
TC 206 208
95 SHC 206 197
kW 18.9 18.8
TC 199 202
105 SHC 199 190
kW 20.8 20.9
TC 192 194
115 SHC 192 192
kW 23.0 22.9
TC 191 191
117 SHC 191 191
kW 23.5 23.5
TC 189 189
120 SHC 189 189
kW 24.2 24.2
579F240 (20 Tons) (cont)
Temp (F)
Air Entering
Condenser
(Edb)
54/0.58 58/0.43
TC 236 238
75 SHC 236 232
kW 15.5 15.5
TC 231 230
85 SHC 231 230
kW 17.5 17.3
TC 223 223
95 SHC 223 223
kW 19.2 19.2
TC 216 216
105 SHC 216 216
kW 21.3 21.3
TC 208 209
115 SHC 208 209
kW 23.5 23.5
TC 207 207
117 SHC 207 207
kW 24.0 24.0
TC 204 205
120 SHC 204 205
kW 24.7 24.7
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)
6,000
62/0.21 67/0.19 72/0.17
232 252 274
189 163 136
15.4 15.8 16.2
226 244 266
185 159 133
17.3 17.6 18.0
217 236 257
181 156 129
19.0 19.5 20.0
209 227 247
177 152 126
21.1 21.6 22.0
200 218 237
173 149 122
23.3 23.8 24.3
199 216 235
172 148 121
23.7 24.2 24.8
196 213 232
170 147 120
24.4 25.0 25.5
8,000
62/0.30 67/0.23 72/0.21
241 259 286
211 181 149
15.6 15.9 16.5
237 254 276
209 179 146
17.4 17.8 18.3
229 245 267
203 176 142
19.3 19.8 20.2
221 236 256
197 172 139
21.4 21.8 22.3
213 226 246
190 168 135
23.7 24.0 24.6
212 224 243
188 167 134
24.1 24.5 25.0
209 221 240
185 166 133
24.8 25.2 25.7
)
lwb
Evaporator Air Quantity — Cfm
Evaporator Air — Ewb (F)/BF
76/0.22 80/0.05 54/0.54 58/0.37
294 316 227 231
112 90 227 217
16.6 17.0 15.3 15.4
285 306 222 225
109 87 222 211
18.4 18.8 17.1 17.3
276 295 215 216
106 84 215 213
20.4 20.8 19.0 19.0
265 285 208 209
103 80 208 209
22.5 22.9 21.0 21.0
254 — 202 202
99 — 202 202
24.8 — 23.2 23.2
252 — 200 200
99 — 200 200
25.2 — 23.8 23.8
249 — 197 198
98 — 197 198
25.9 — 24.5 24.5
Evaporator Air Quantity — Cfm
Evaporator Air — Ewb (F)/BF
76/0.22 80/0.04 54/0.62 58/0.48
302 328 244 244
119 91 244 244
16.6 17.3 15.7 15.7
296 — 237 238
117 — 237 238
18.7 — 17.5 17.6
285 — 231 230
114 — 231 230
20.6 — 19.5 19.4
274 — 222 223
110 — 222 223
22.7 — 21.4 21.5
263 — 214 214
107 — 214 214
25.0 — 23.7 23.7
260 — 213 213
106 — 213 213
25.5 — 24.2 24.2
— — 210 210
— — 210 210
— — 24.9 24.9
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
FACTOR
(BF)
0.05
0.10
0.20
0.30
0.40
0.50
0.60
0.70
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
156
7,000
62/0.25 67/0.21 72/0.19
238 254 281
202 172 143
15.5 15.9 16.4
231 250 272
198 170 140
17.3 17.7 18.2
223 241 262
194 166 136
19.2 19.6 20.1
215 232 252
189 163 132
21.2 21.7 22.2
207 222 242
183 159 129
23.5 23.9 24.5
205 220 240
182 158 128
23.9 24.4 24.9
203 217 236
181 156 127
24.6 25.1 25.6
9,000
62/0.35 67/0.24 72/0.23
250 267 290
222 192 155
15.8 16.1 16.6
243 258 281
216 189 152
17.6 18.0 18.4
235 249 270
209 185 148
19.5 19.8 20.3
228 239 260
202 181 145
21.6 21.9 22.4
220 229 249
193 177 141
23.9 24.2 24.7
219 227 246
191 176 140
24.2 24.6 25.1
215 224 243
193 175 139
25.0 25.3 25.8
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
0.98 1.96 2.94 3.92 4.91
0.87 1.74 2.62 3.49 4.36
0.76 1.53 2.29 3.05 3.82
0.65 1.31 1.96 2.62 3.27
0.55 1.09 1.64 2.18 2.73
0.44 0.87 1.31 1.74 2.18
0.33 0.65 0.98 1.31 1.64
76/0.21 80/0.04
297 322
115 91
16.5 17.2
291 312
113 88
18.6 19.0
281 301
110 84
20.5 21.0
270 —
107 —
22.6 —
259 —
103 —
24.9 —
257 —
102 —
25.3 —
— —
— —
— —
76/0.23 80/0.04
307 —
123 —
16.7 —
300 —
121 —
18.8 —
289 —
117 —
20.8 —
278 —
114 —
22.8 —
266 —
110 —
25.1 —
263 —
109 —
25.6 —
— —
— —
— —
under 75
over 85
Use formula
shown below.