Bryant 579F User Manual page 245

581A181 (15 TONS) UNIT WITH HOT GAS REHEAT — A AND B IN REHEAT, C ON
Temp (F)
4500/0.12
Air Entering
Condenser
(Edb)
50 55
TC 133 140
65 SHC 73 69
kW 10.7 10.7
TC 116 123
75 SHC 61 55
kW 11.8 11.8
TC 98 105
85 SHC 48 41
kW 12.9 13.0
TC 81 88
95 SHC 36 28
kW 14.0 14.1
581A210 (18 TONS) UNIT WITH HOT GAS REHEAT IN COOLING MODE
Temp (F)
5400/0.03
Air Entering
Condenser
(Edb)
57 62 67
TC 183 198 215
75
SHC 182 169 143
kW 11.5 11.7 11.9
TC 179 192 210
85
SHC 179 166 142
kW 12.8 13.1 13.3
TC 175 186 202
95
SHC 175 163 142
kW 14.1 14.3 14.6
TC 170 180 197
105
SHC 170 160 136
kW 15.6 15.8 16.1
TC 165 173 189
115
SHC 165 157 133
kW 17.2 17.4 17.7
TC 159 166 181
125
SHC 159 154 130
kW 18.9 19.1 19.5
581A210 (18 TONS) UNIT WITH HOT GAS REHEAT — A IN REHEAT, B AND C OFF
Temp (F)
5400/0.03
Air Entering
Condenser
(Edb)
50 55
TC 61 63
65 SHC 38 35
kW 5.0 5.0
TC 47 48
75 SHC 24 21
kW 5.4 5.4
TC 32 33
85 SHC 11 7
kW 5.9 5.9
TC 17 18
95 SHC –3 –8
kW 6.3 6.3
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)
5250/0.14
60 50 55
146 134 141
65 75 71
10.8 10.7 10.7
128 117 123
50 63 57
11.8 11.8 11.8
111 99 106
35 50 43
13.0 12.9 13.0
94 81 88
21 38 29
14.1 14.0 14.1
6300/0.04
72 57 62 67
236 192 206 224
120 192 184 156
12.2 11.6 11.8 12.1 12.4
231 188 200 217
117 188 181 153
13.7 13.0 13.2 13.5 13.8
223 184 193 209
114 184 177 151
14.9 14.3 14.4 14.7 15.1
215 179 186 201
111 179 174 147
16.5 15.8 15.9 16.2 16.6
208 173 179 195
109 173 170 144
18.1 17.4 17.5 17.8 18.2
199 167 171 186
105 167 166 140
19.9 19.1 19.2 19.6 20.0
6300/0.04
60 50 55
65 62 64
34 40 37
5.0 5.0 5.0
50 47 49
18 26 23
5.4 5.4 5.4
35 32 34
3 13 9
5.9 5.9 5.9
19 18 19
–12 –1 –6
6.3 6.3 6.3
Evaporator Air Quantity — Cfm/BF
6000/.015
Evaporator Air — Relative Humidity (%)
60 50 55 60
147 135 142 148
67 77 73 69
10.8 10.7 10.7 10.8
129 117 124 130
52 65 59 54
11.8 11.8 11.8 11.8
112 99 106 112
37 52 45 39
13.0 12.9 13.0 13.0
94 81 88 95
22 39 31 24
14.1 14.0 14.1 14.1
Air Entering Evaporator — Cfm/BF
7200/0.05
Air Entering Evaporator — Ewb (F)
72 57 62 67 72
245 201 212 230 252
127 201 197 166 134
11.7 11.9 12.2 12.5
239 197 205 223 244
125 197 194 163 131
13.2 13.3 13.6 13.9
229 193 198 215 236
121 193 191 160 128
14.4 14.5 14.8 15.2
222 187 192 208 226
118 187 186 158 125
15.9 16.0 16.3 16.7
214 181 184 199 218
116 181 181 154 122
17.5 17.6 17.9 18.3
203 174 177 190 207
112 174 175 151 118
19.3 19.4 19.7 20.1
Evaporator Air Quantity — Cfm/BF
7200/0.05
Evaporator Air — Relative Humidity (%)
60 50 55 60
66 63 65 66
35 41 39 37
5.0 5.0 5.0 5.0
51 48 50 51
20 28 25 22
5.4 5.4 5.4 5.4
35 33 34 36
5 14 11 7
5.9 5.9 5.9 5.9
20 18 19 20
–10 1 –4 –8
6.3 6.3 6.3 6.3
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).
245
6750/0.18
50 55 60 50
136 143 149 137
79 75 71 81
10.7 10.7 10.8 10.7
118 125 131 118
66 61 56 68
11.8 11.8 11.8 11.8
100 107 113 100
54 46 40 55
12.9 13.0 13.0 12.9
81 89 95 81
41 32 25 42
14.0 14.1 14.1 14.0
8100/0.06
57 62 67 72 57
210 216 235 257 217
210 209 177 141 217
11.9 11.9 12.2 12.5 12.0
205 210 227 249 212
205 206 173 138 212
13.3 13.4 13.7 14.0 13.4
200 203 219 241 206
200 200 170 135 206
14.6 14.6 14.9 15.3 14.7
194 197 212 230 200
194 195 168 131 200
16.1 16.1 16.4 16.8 16.2
187 189 203 222 193
187 188 164 128 193
17.7 17.7 18.0 18.4 17.8
180 182 193 210 186
180 181 160 124 186
19.5 19.5 19.8 20.1 19.6
8100/0.06
50 55 60 50
63 65 67 64
43 41 39 44
5.0 5.0 5.0 5.0
48 50 52 49
29 26 24 31
5.4 5.4 5.4 5.4
33 35 36 34
16 12 9 17
5.9 5.9 5.9 5.9
19 20 21 19
3 –2 –6 4
6.3 6.3 6.3 6.3
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
7500/0.18
55 60
144 150
76 72
10.7 10.8
126 132
62 57
11.8 11.8
107 113
48 42
13.0 13.0
89 95
34 26
14.1 14.1
9000/0.07
62 67 72
222 240 262
218 186 147
12.0 12.3 12.6
215 232 254
213 183 145
13.5 13.7 14.1
208 223 245
207 180 142
14.7 15.0 15.4
202 215 235
201 178 138
16.2 16.5 16.9
194 205 225
194 173 134
17.9 18.1 18.5
187 196 213
187 170 130
19.6 19.8 20.2
9000/0.07
55 60
66 68
42 40
5.0 5.0
51 52
28 25
5.4 5.4
35 37
14 10
5.9 5.9
20 21
0 –4
6.3 6.3
under 75
over 85
Use formula
shown below.