Bryant 579F User Manual page 244

581A181 (15 TONS) UNIT WITH HOT GAS REHEAT IN COOLING MODE
Temp (F)
4500/0.02
Air Entering
Condenser
(Edb)
57 62 67
TC 166 179 193
75
SHC 165 152 129
kW 10.4 10.6 10.7
TC 162 174 189
85
SHC 162 150 127
kW 11.7 11.9 12.1
TC 158 169 182
95
SHC 158 148 126
kW 12.7 12.9 13.1
TC 153 163 178
105
SHC 153 145 123
kW 14.1 14.2 14.4
TC 148 156 171
115
SHC 148 141 120
kW 15.5 15.6 15.8
TC 143 149 163
125
SHC 143 138 117
kW 17.0 17.1 17.4
581A181 (15 TONS) UNIT WITH HOT GAS REHEAT — A IN REHEAT, B AND C OFF
Temp (F)
4500/0.12
Air Entering
Condenser
(Edb)
50 55
TC 55 57
65 SHC 34 32
kW 4.4 4.5
TC 42 44
75 SHC 22 19
kW 4.8 4.8
TC 29 30
85 SHC 9 6
kW 5.2 5.2
TC 15 16
95 SHC –3 –7
kW 5.6 5.6
581A181 (15 TONS) UNIT WITH HOT GAS REHEAT — A AND B IN REHEAT, C OFF
Temp (F)
4500/0.12
Air Entering
Condenser
(Edb)
50 55
TC 81 84
65 SHC 34 32
kW 7.8 7.9
TC 62 64
75 SHC 22 19
kW 8.5 8.5
TC 42 44
85 SHC 10 6
kW 9.2 9.2
TC 23 24
95 SHC –2 –7
kW 9.9 9.9
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
Air Entering Evaporator — Cfm/BF
5250/0.03
Air Entering Evaporator — Ewb (F)
72 57 62 67 72
214 175 186 202 221
108 175 166 140 115
10.9 10.5 10.6 10.8 11.0
209 171 180 195 216
106 171 163 137 113
12.3 11.8 12.0 12.1 12.4
202 166 174 187 209
104 166 160 134 110
13.3 12.9 13.0 13.2 13.4
195 162 168 181 201
101 162 157 133 107
14.7 14.2 14.3 14.5 14.8
188 157 161 176 193
98 157 153 130 104
16.1 15.6 15.7 15.9 16.2
179 151 153 168 184
95 151 149 126 101
17.7 17.2 17.2 17.5 17.8
5250/0.14
Evaporator Air — Relative Humidity (%)
60 50 55 60
59 56 58 59
30 36 34 32
4.5 4.4 4.5 4.5
45 43 44 46
17 23 21 18
4.8 4.8 4.8 4.8
31 29 31 32
3 11 8 5
5.3 5.2 5.2 5.3
17 16 17 18
–11 –1 –5 –9
5.6 5.6 5.6 5.6
5250/0.14
Evaporator Air — Relative Humidity (%)
60 50 55 60
86 82 85 87
30 36 33 31
7.9 7.8 7.9 7.9
66 62 65 67
16 24 21 18
8.5 8.5 8.5 8.5
46 43 45 46
2 12 8 4
9.3 9.2 9.2 9.3
26 23 25 26
–11 0 –5 –9
9.9 9.9 9.9 9.9
6000/0.04
57 62 67 72 57
183 191 208 227 190
183 178 150 121 190
10.6 10.7 10.9 11.1 10.7
179 185 200 222 186
179 175 147 119 186
11.9 12.0 12.2 12.5 12.0
174 179 194 214 181
174 172 145 116 181
13.0 13.0 13.2 13.5 13.1
169 172 188 206 175
169 167 142 113 175
14.3 14.3 14.6 14.8 14.4
163 165 180 197 169
163 162 139 110 169
15.7 15.8 16.0 16.3 15.8
157 158 171 188 163
157 156 136 107 163
17.3 17.3 17.6 17.8 17.4
Evaporator Air Quantity — Cfm/BF
6000/.015
50 55 60
56 58 60
37 35 33
4.4 4.5 4.5
43 45 46
25 22 20
4.8 4.8 4.8
30 31 32
13 10 7
5.2 5.2 5.3
16 18 18
1 –3 –7
5.6 5.6 5.6
Evaporator Air Quantity — Cfm/BF
6000/.015
50 55 60
83 86 88
37 35 33
7.8 7.9 7.9
63 66 68
25 22 20
8.5 8.5 8.5
43 45 47
14 10 6
9.2 9.2 9.3
24 25 27
2 –3 –7
9.9 9.9 9.9
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
79
FACTOR
81
(BF)
.05 1.04
.10 .98
.20 .87
.30 .76
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
244
6750/0.04
62 67 72 57
195 212 232 197
189 159 127 197
10.7 10.9 11.2 10.8
189 205 226 192
185 156 125 192
12.1 12.3 12.5 12.1
183 198 218 187
180 154 122 187
13.1 13.3 13.6 13.1
177 191 209 181
175 151 119 181
14.4 14.6 14.9 14.5
170 183 201 174
169 148 116 174
15.8 16.1 16.3 15.9
163 174 190 167
163 144 112 167
17.4 17.6 17.9 17.5
6750/0.18
50 55 60 50
57 59 60 57
38 36 35 40
4.4 4.5 4.5 4.4
43 45 46 44
26 24 21 28
4.8 4.8 4.8 4.8
30 32 33 31
14 11 8 16
5.2 5.2 5.3 5.2
17 18 19 17
2 –2 –5 4
5.6 5.6 5.6 5.6
6750/0.18
50 55 60 50
84 87 89 85
39 36 34 40
7.8 7.9 7.9 7.8
64 66 68 64
27 24 21 28
8.5 8.5 8.5 8.5
44 46 48 44
15 11 8 16
9.2 9.2 9.3 9.2
24 26 27 24
3 –1 –6 5
9.9 9.9 9.9 9.9
ENTERING AIR DRY-BULB TEMP (F)
78 77 76
82 83 84
Correction Factor
2.07 3.11 4.14
1.96 2.94 3.92
1.74 2.62 3.49
1.53 2.29 3.05
7500/0.05
62 67 72
199 216 236
196 168 133
10.8 11.0 11.2
194 208 230
192 164 131
12.1 12.3 12.6
188 201 221
187 163 128
13.2 13.4 13.6
181 194 213
181 160 125
14.5 14.7 14.9
175 185 203
174 156 122
15.9 16.1 16.4
167 176 192
167 153 118
17.5 17.6 17.9
7500/0.18
55 60
59 61
38 36
4.5 4.5
45 47
25 23
4.8 4.8
32 33
12 9
5.2 5.3
18 19
0 –4
5.6 5.6
7500/0.18
55 60
87 90
38 36
7.9 7.9
67 69
25 22
8.5 8.5
46 48
13 9
9.2 9.3
26 27
0 –4
9.9 9.9
75 under 75
85 over 85
Use for-
5.18
mula
4.90
shown
4.36
below.
3.82