Bryant 579F User Manual page 246

581A210 (18 TONS) UNIT WITH HOT GAS REHEAT — A AND B IN REHEAT, C OFF
Temp (F)
5400/0.03
Air Entering
Condenser
(Edb)
50 55
TC 90 93
65 SHC 38 35
kW 8.8 8.8
TC 68 71
75 SHC 24 21
kW 9.6 9.6
TC 47 49
85 SHC 11 7
kW 10.3 10.3
TC 25 27
95 SHC –2 –8
kW 11.1 11.1
581A210 (18 TONS) UNIT WITH HOT GAS REHEAT — A AND B IN REHEAT, C ON
Temp (F)
5400/0.03
Air Entering
Condenser
(Edb)
50 55
TC 147 155
65 SHC 81 76
kW 11.9 12.0
TC 128 136
75 SHC 67 61
kW 13.2 13.2
TC 108 117
85 SHC 54 46
kW 14.5 14.5
TC 89 98
95 SHC 40 31
kW 15.8 15.7
581A240 (20 TONS) UNIT WITH HOT GAS REHEAT IN COOLING MODE
Temp (F)
6000/0.04
Air Entering
Condenser
(Edb)
57 62 67
TC 216 234 255
75
SHC 213 199 171
kW 13.9 14.2 14.6
TC 211 227 249
85
SHC 209 194 168
kW 15.4 15.8 16.2
TC 207 220 240
95
SHC 205 192 164
kW 17.2 17.5 17.9
TC 201 214 232
105
SHC 197 190 161
kW 19.0 19.3 19.8
TC 195 206 224
115
SHC 191 185 158
kW 21.0 21.3 21.8
TC 189 198 215
125
SHC 184 179 154
kW 23.1 23.4 24.0
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
t = Wet-bulb temperature corresponding to enthalpy of air leaving evapo-
lwb
rator coil (h )
lwb
total capacity (Btuh)
h = h –
lwb ewb
4.5 x cfm
Where: h = Enthalpy of air entering evaporator coil
ewb
PERFORMANCE DATA (cont)
COOLING CAPACITIES, UNITS WITH HOT GAS REHEAT OPTION (cont)
6300/0.04
60 50 55
95 91 94
33 40 37
8.8 8.8 8.8
73 69 72
18 26 23
9.6 9.6 9.6
51 47 50
3 13 9
10.3 10.3 10.3
29 26 27
–12 0 –5
11.1 11.1 11.1
6300/0.04
60 50 55
162 148 157
72 84 79
12.0 11.9 12.0
143 129 137
56 70 63
13.2 13.2 13.2
124 109 118
39 56 48
14.5 14.5 14.5
105 89 98
23 42 33
15.7 15.8 15.7
7000/0.05
72 57 62 67
279 226 243 265
141 225 217 185
15.0 14.0 14.4 14.8 15.3
272 221 237 258
141 221 214 182
16.7 15.7 16.0 16.4 16.9
262 217 228 250
134 217 209 179
18.4 17.4 17.7 18.2 18.6
253 211 221 238
131 211 206 172
20.3 19.3 19.5 20.0 20.6
245 205 213 230
129 205 201 171
22.4 21.3 21.5 22.0 22.7
235 198 204 221
125 198 194 167
24.7 23.5 23.7 24.2 24.8
Evaporator Air Quantity — Cfm/BF
7200/0.05
Evaporator Air — Relative Humidity (%)
60 50 55 60
97 92 95 98
35 41 39 37
8.8 8.8 8.8 8.8
74 70 73 75
20 28 25 22
9.6 9.6 9.6 9.6
52 48 50 52
5 15 11 7
10.3 10.3 10.3 10.3
29 26 28 29
–10 2 –-3 –8
11.1 11.1 11.1 11.1
Evaporator Air Quantity — Cfm/BF
7200/0.05
Evaporator Air — Relative Humidity (%)
60 50 55 60
164 150 158 165
75 86 81 77
12.0 11.9 12.0 12.0
144 130 138 146
58 72 65 60
13.2 13.2 13.2 13.2
125 110 118 126
41 58 50 43
14.5 14.5 14.5 14.5
106 89 98 106
25 44 34 26
15.7 15.8 15.7 15.7
Air Entering Evaporator — Cfm/BF
8000/0.06
Air Entering Evaporator — Ewb (F)
72 57 62 67 72
290 237 251 273 298
151 237 232 198 159
14.3 14.5 15.0 15.4
282 232 243 265 287
148 232 228 195 155
15.9 16.1 16.6 17.1
269 228 235 254 278
142 228 222 190 152
17.7 17.9 18.3 18.8
261 221 228 247 266
140 221 216 188 146
19.5 19.7 20.2 20.7
252 214 219 236 258
137 214 209 183 145
21.6 21.7 22.2 22.8
239 207 210 225 244
132 207 201 179 139
23.8 23.9 24.4 25.0
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)
.05
.10
.20
.30
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
246
8100/0.06
50 55 60 50
93 96 99 94
43 40 38 44
8.8 8.8 8.8 8.8
71 74 76 72
30 26 23 31
9.6 9.6 9.6 9.6
49 51 53 49
17 12 9 18
10.3 10.3 10.3 10.3
26 28 30 27
3 –2 –6 5
11.1 11.1 11.1 11.1
8100/0.06
50 55 60 50
151 160 167 152
88 83 79 90
11.9 12.0 12.0 11.9
131 139 147 132
74 67 62 76
13.2 13.2 13.2 13.2
110 119 127 111
60 52 45 61
14.5 14.5 14.5 14.5
90 99 107 90
45 36 28 47
15.8 15.7 15.7 15.8
9000/0.07
57 62 67 72 57
247 256 279 305 256
247 241 211 168 256
14.5 14.6 15.1 15.6 14.6
242 250 270 293 250
242 237 206 163 250
16.1 16.3 16.7 17.2 16.3
236 241 259 286 243
236 230 202 161 243
17.9 18.0 18.4 19.0 18.1
229 234 251 271 236
229 223 200 155 236
19.8 19.9 20.3 20.8 20.0
221 225 240 262 228
221 215 194 152 228
21.8 21.9 22.3 22.9 22.0
214 216 229 248 220
214 207 191 147 220
24.0 24.1 24.5 25.1 24.2
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
9000/0.07
55 60
97 100
42 40
8.8 8.8
74 77
28 25
9.6 9.6
51 53
14 10
10.3 10.3
29 30
0 –5
11.1 11.1
9000/0.07
55 60
161 168
85 80
12.0 12.0
140 148
69 63
13.2 13.2
120 127
53 46
14.5 14.5
99 107
37 29
15.7 15.7
10,000/0.08
62 67 72
263 284 310
251 223 176
14.8 15.2 15.7
255 275 300
244 220 173
16.4 16.8 17.4
247 264 290
236 214 169
18.2 18.6 19.1
239 255 278
229 212 165
20.0 20.4 21.0
231 243 265
221 207 160
22.1 22.4 23.0
222 232 251
212 202 154
24.3 24.6 25.2
under 75
over 85
Use formula
shown below.