215 performance data (cont) – Bryant 581A/B User Manual
Page 215
215
PERFORMANCE DATA (cont)
COOLING CAPACITIES, UNITS WITH HOT GAS REHEAT OPTION (cont)
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
t
lwb
= Wet-bulb temperature corresponding to enthalpy of air leaving evapo-
rator coil (h
lwb
)
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).
581A210 (18 TONS) UNIT WITH HOT GAS REHEAT — A AND B IN REHEAT, C OFF
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm/BF
5400/0.03
6300/0.04
7200/0.05
8100/0.06
9000/0.07
Evaporator Air — Relative Humidity (%)
50
55
60
50
55
60
50
55
60
50
55
60
50
55
60
65
TC
90
93
95
91
94
97
92
95
98
93
96
99
94
97
100
SHC
38
35
33
40
37
35
41
39
37
43
40
38
44
42
40
kW
8.8
8.8
8.8
8.8
8.8
8.8
8.8
8.8
8.8
8.8
8.8
8.8
8.8
8.8
8.8
75
TC
68
71
73
69
72
74
70
73
75
71
74
76
72
74
77
SHC
24
21
18
26
23
20
28
25
22
30
26
23
31
28
25
kW
9.6
9.6
9.6
9.6
9.6
9.6
9.6
9.6
9.6
9.6
9.6
9.6
9.6
9.6
9.6
85
TC
47
49
51
47
50
52
48
50
52
49
51
53
49
51
53
SHC
11
7
3
13
9
5
15
11
7
17
12
9
18
14
10
kW
10.3
10.3
10.3
10.3
10.3
10.3
10.3
10.3
10.3
10.3
10.3
10.3
10.3
10.3
10.3
95
TC
25
27
29
26
27
29
26
28
29
26
28
30
27
29
30
SHC
–2
–8
–12
0
–5
–10
2
–-3
–8
3
–2
–6
5
0
–5
kW
11.1
11.1
11.1
11.1
11.1
11.1
11.1
11.1
11.1
11.1
11.1
11.1
11.1
11.1
11.1
581A210 (18 TONS) UNIT WITH HOT GAS REHEAT — A AND B IN REHEAT, C ON
Temp (F)
Air Entering
Condenser
(Edb)
Evaporator Air Quantity — Cfm/BF
5400/0.03
6300/0.04
7200/0.05
8100/0.06
9000/0.07
Evaporator Air — Relative Humidity (%)
50
55
60
50
55
60
50
55
60
50
55
60
50
55
60
65
TC
147
155
162
148
157
164
150
158
165
151
160
167
152
161
168
SHC
81
76
72
84
79
75
86
81
77
88
83
79
90
85
80
kW
11.9
12.0
12.0
11.9
12.0
12.0
11.9
12.0
12.0
11.9
12.0
12.0
11.9
12.0
12.0
75
TC
128
136
143
129
137
144
130
138
146
131
139
147
132
140
148
SHC
67
61
56
70
63
58
72
65
60
74
67
62
76
69
63
kW
13.2
13.2
13.2
13.2
13.2
13.2
13.2
13.2
13.2
13.2
13.2
13.2
13.2
13.2
13.2
85
TC
108
117
124
109
118
125
110
118
126
110
119
127
111
120
127
SHC
54
46
39
56
48
41
58
50
43
60
52
45
61
53
46
kW
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
95
TC
89
98
105
89
98
106
89
98
106
90
99
107
90
99
107
SHC
40
31
23
42
33
25
44
34
26
45
36
28
47
37
29
kW
15.8
15.7
15.7
15.8
15.7
15.7
15.8
15.7
15.7
15.8
15.7
15.7
15.8
15.7
15.7
581A240 (20 TONS) UNIT WITH HOT GAS REHEAT IN COOLING MODE
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
6000/0.04
7000/0.05
8000/0.06
9000/0.07
10,000/0.08
Air Entering Evaporator — Ewb (F)
57
62
67
72
57
62
67
72
57
62
67
72
57
62
67
72
57
62
67
72
75
TC
216
234
255
279
226
243
265
290
237
251
273
298
247
256
279
305
256
263
284
310
SHC
213
199
171
141
225
217
185
151
237
232
198
159
247
241
211
168
256
251
223
176
kW
13.9
14.2
14.6
15.0
14.0
14.4
14.8
15.3
14.3
14.5
15.0
15.4
14.5
14.6
15.1
15.6
14.6
14.8
15.2
15.7
85
TC
211
227
249
272
221
237
258
282
232
243
265
287
242
250
270
293
250
255
275
300
SHC
209
194
168
141
221
214
182
148
232
228
195
155
242
237
206
163
250
244
220
173
kW
15.4
15.8
16.2
16.7
15.7
16.0
16.4
16.9
15.9
16.1
16.6
17.1
16.1
16.3
16.7
17.2
16.3
16.4
16.8
17.4
95
TC
207
220
240
262
217
228
250
269
228
235
254
278
236
241
259
286
243
247
264
290
SHC
205
192
164
134
217
209
179
142
228
222
190
152
236
230
202
161
243
236
214
169
kW
17.2
17.5
17.9
18.4
17.4
17.7
18.2
18.6
17.7
17.9
18.3
18.8
17.9
18.0
18.4
19.0
18.1
18.2
18.6
19.1
105
TC
201
214
232
253
211
221
238
261
221
228
247
266
229
234
251
271
236
239
255
278
SHC
197
190
161
131
211
206
172
140
221
216
188
146
229
223
200
155
236
229
212
165
kW
19.0
19.3
19.8
20.3
19.3
19.5
20.0
20.6
19.5
19.7
20.2
20.7
19.8
19.9
20.3
20.8
20.0
20.0
20.4
21.0
115
TC
195
206
224
245
205
213
230
252
214
219
236
258
221
225
240
262
228
231
243
265
SHC
191
185
158
129
205
201
171
137
214
209
183
145
221
215
194
152
228
221
207
160
kW
21.0
21.3
21.8
22.4
21.3
21.5
22.0
22.7
21.6
21.7
22.2
22.8
21.8
21.9
22.3
22.9
22.0
22.1
22.4
23.0
125
TC
189
198
215
235
198
204
221
239
207
210
225
244
214
216
229
248
220
222
232
251
SHC
184
179
154
125
198
194
167
132
207
201
179
139
214
207
191
147
220
212
202
154
kW
23.1
23.4
24.0
24.7
23.5
23.7
24.2
24.8
23.8
23.9
24.4
25.0
24.0
24.1
24.5
25.1
24.2
24.3
24.6
25.2
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
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
.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
5
81A1
55-
30
0