187
PERFORMANCE DATA — 579F (cont)
COOLING CAPACITIES (cont)
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
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
.
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
579F240 (20 Tons)
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm
6,000
7,000
Evaporator Air — Ewb (F)/BF
54/0.48
58/0.31
62/0.21
67/0.19
72/0.17
76/0.22
80/0.05
54/0.54
58/0.37
62/0.25
67/0.21
72/0.19
76/0.21
80/0.04
75
TC
217
222
232
252
274
294
316
227
231
238
254
281
297
322
SHC
217
199
189
163
136
112
90
227
217
202
172
143
115
91
kW
15.1
15.2
15.4
15.8
16.2
16.6
17.0
15.3
15.4
15.5
15.9
16.4
16.5
17.2
85
TC
212
217
226
244
266
285
306
222
225
231
250
272
291
312
SHC
212
194
185
159
133
109
87
222
211
198
170
140
113
88
kW
16.9
17.2
17.3
17.6
18.0
18.4
18.8
17.1
17.3
17.3
17.7
18.2
18.6
19.0
95
TC
206
208
217
236
257
276
295
215
216
223
241
262
281
301
SHC
206
197
181
156
129
106
84
215
213
194
166
136
110
84
kW
18.9
18.8
19.0
19.5
20.0
20.4
20.8
19.0
19.0
19.2
19.6
20.1
20.5
21.0
105
TC
199
202
209
227
247
265
285
208
209
215
232
252
270
—
SHC
199
190
177
152
126
103
80
208
209
189
163
132
107
—
kW
20.8
20.9
21.1
21.6
22.0
22.5
22.9
21.0
21.0
21.2
21.7
22.2
22.6
—
115
TC
192
194
200
218
237
254
—
202
202
207
222
242
259
—
SHC
192
192
173
149
122
99
—
202
202
183
159
129
103
—
kW
23.0
22.9
23.3
23.8
24.3
24.8
—
23.2
23.2
23.5
23.9
24.5
24.9
—
117
TC
191
191
199
216
235
252
—
200
200
205
220
240
257
—
SHC
191
191
172
148
121
99
—
200
200
182
158
128
102
—
kW
23.5
23.5
23.7
24.2
24.8
25.2
—
23.8
23.8
23.9
24.4
24.9
25.3
—
120
TC
189
189
196
213
232
249
—
197
198
203
217
236
—
—
SHC
189
189
170
147
120
98
—
197
198
181
156
127
—
—
kW
24.2
24.2
24.4
25.0
25.5
25.9
—
24.5
24.5
24.6
25.1
25.6
—
—
579F240 (20 Tons) (cont)
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm
8,000
9,000
Evaporator Air — Ewb (F)/BF
54/0.58
58/0.43
62/0.30
67/0.23
72/0.21
76/0.22
80/0.04
54/0.62
58/0.48
62/0.35
67/0.24
72/0.23
76/0.23
80/0.04
75
TC
236
238
241
259
286
302
328
244
244
250
267
290
307
—
SHC
236
232
211
181
149
119
91
244
244
222
192
155
123
—
kW
15.5
15.5
15.6
15.9
16.5
16.6
17.3
15.7
15.7
15.8
16.1
16.6
16.7
—
85
TC
231
230
237
254
276
296
—
237
238
243
258
281
300
—
SHC
231
230
209
179
146
117
—
237
238
216
189
152
121
—
kW
17.5
17.3
17.4
17.8
18.3
18.7
—
17.5
17.6
17.6
18.0
18.4
18.8
—
95
TC
223
223
229
245
267
285
—
231
230
235
249
270
289
—
SHC
223
223
203
176
142
114
—
231
230
209
185
148
117
—
kW
19.2
19.2
19.3
19.8
20.2
20.6
—
19.5
19.4
19.5
19.8
20.3
20.8
—
105
TC
216
216
221
236
256
274
—
222
223
228
239
260
278
—
SHC
216
216
197
172
139
110
—
222
223
202
181
145
114
—
kW
21.3
21.3
21.4
21.8
22.3
22.7
—
21.4
21.5
21.6
21.9
22.4
22.8
—
115
TC
208
209
213
226
246
263
—
214
214
220
229
249
266
—
SHC
208
209
190
168
135
107
—
214
214
193
177
141
110
—
kW
23.5
23.5
23.7
24.0
24.6
25.0
—
23.7
23.7
23.9
24.2
24.7
25.1
—
117
TC
207
207
212
224
243
260
—
213
213
219
227
246
263
—
SHC
207
207
188
167
134
106
—
213
213
191
176
140
109
—
kW
24.0
24.0
24.1
24.5
25.0
25.5
—
24.2
24.2
24.2
24.6
25.1
25.6
—
120
TC
204
205
209
221
240
—
—
210
210
215
224
243
—
—
SHC
204
205
185
166
133
—
—
210
210
193
175
139
—
—
kW
24.7
24.7
24.8
25.2
25.7
—
—
24.9
24.9
25.0
25.3
25.8
—
—
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
t
ldb
=
t
edb
–
sensible capacity (Btuh)
1.10 x cfm
t
lwb
=
Wet-bulb temperature corresponding to enthalpy of air
leaving evaporator coil (h
lwb
)
h
lwb
=
h
ewb
–
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
0.05
1.04
2.07
3.11
4.14
5.18
Use formula
shown below.
0.10
0.98
1.96
2.94
3.92
4.91
0.20
0.87
1.74
2.62
3.49
4.36
0.30
0.76
1.53
2.29
3.05
3.82
0.40
0.65
1.31
1.96
2.62
3.27
0.50
0.55
1.09
1.64
2.18
2.73
0.60
0.44
0.87
1.31
1.74
2.18
0.70
0.33
0.65
0.98
1.31
1.64
579
F18
0
-300
Summary of Contents for 581A
Page 30: ...30 BASE UNIT DIMENSIONS 580F036 072 a48 8195 580F036 151 ...
Page 31: ...31 BASE UNIT DIMENSIONS 580F073 a48 8196 580F036 151 ...
Page 32: ...32 BASE UNIT DIMENSIONS 580F090 120 150 a48 8197 580F036 151 ...
Page 33: ...33 BASE UNIT DIMENSIONS 580F091 103 121 151 a48 8198 580F036 151 ...
Page 91: ...91 BASE UNIT DIMENSIONS 581B036 072 a48 8199 581B036 150 ...
Page 93: ...93 ACCESSORY DIMENSIONS 581B036 072 a48 8201 581B036 150 ...
Page 94: ...94 ACCESSORY DIMENSIONS 581B090 150 a48 8202 581B036 150 ...
Page 150: ...150 BASE UNIT DIMENSIONS 581C024 060 581C024 060 ...
Page 198: ...198 TYPICAL WIRING SCHEMATICS 579F 579F240 208 230 V Shown a48 7929 ...
Page 205: ...205 BASE UNIT DIMENSIONS 580F180 210 a48 8203 580F180 300 ...
Page 206: ...206 BASE UNIT DIMENSIONS 580F240 a48 8204 ...
Page 207: ...207 BASE UNIT DIMENSIONS 580F300 a48 8205 580F180 300 ...
Page 209: ...209 ACCESSORY DIMENSIONS 580F300 Vertical Roof Curbs 580F300 a48 7456 580F180 300 ...
Page 233: ...233 BASE UNIT DIMENSIONS 581A210 300 a48 8206 581A155 180 ...
Page 237: ...237 ACCESSORY DIMENSIONS 581A210 300 a48 8234 581A155 180 ...
Page 280: ...280 TYPICAL PIPING AND WIRING 581A 581A155 Shown LEGEND NEC National Electrical Code b48 1258 ...
Page 297: ...297 ...