Bryant 542E - Manual (Page 9)

TABLE IV-HEATING PERFORMANCE PRESSURES
Air Temp at
Indoor Coil
Inlet l°F DB|
Pressure
Designation
(Psig)
5426024 542E030 542E036
Air Temperature at Outdoor Coil F°0B Air Temperature at Outdoor Coil °F0B Air Temperature at Outdoor Coil °FDB
60 50 40 30 20 10 0 - t o 60 50 40 30 20 10 0 -10 60 50 40 30 20 10 0 -10
65 High Side 250 229 209 190 172 155 140 127 238 218 201 184 169 155 144 134 232 214 198 183 170 158 149 142
Low Side 69 59 49 41 33 25 18 14 71 60 50 41 32 24 18 13 64 52 46 38 31 25 18 13
70 High Side 268 243 220 199 180 162 147 134 251 231 211 195 179 165 153 142 247 230 213 198 184 171 161 152
Low Side 70 60 50 42 34 26 19 15 72 61 51 42 33 25 19 14 65 53 47 39 31 25 19 13
75 High Side 280 256 233 211 190 172 155 140 266 246 226 207 190 176 162 151 261 243 225 209 195 182 171 162
Low Side 71 61 51 43 35 27 20 16 73 62 52 43 34 26 20 15 66 54 48 40 32 26 19 14
Air Temp at
Indoor Coil
Inlet (°F OBI
Pressure
Designation
(PsigI
542E042 542E04B 5420060 S 542E060
Air Temperature at Outdoor Coil °FDB Air Temperature at Outdoor Coil °FDB Air Temperature at Outdoor Coil °FDB)
60 50 40 30 20 10 0 -10 60 50 40 30 20 10 0 -10 60 50 40 30 20 10 0 -10
65 High Side 254 234 216 193 171 159 148 136 262 237 214 193 174 158 144 134 268 238 210 186 166 151 142 136
Low Side 71 62 50 42 32 24 18 14 64 56 48 40 33 26 19 13 66 56 47 39 32 24 19 13
70 High Side 268 250 230 205 183 169 156 144 278 251 226 204 184 166 154 146 284 252 224 198 178 164 154 146
Low Side 72 63 51 43 33 25 18 14 65 57 49 41 34 27 20 13 67 57 48 40 32 25 19 13
75 High Side 283 266 243 218 194 180 166 153 290 266 242 220 201 184 169 158 298 268 238 212 190 174 162 156
Low Side 73 64 52 44 34 26 19 14 66 58 50 42 35 28 21 14 68 58 49 41 33 25 20 14
TABLE V-COOLING PERFORMANCE PRESSURES
Air Tem p at
Indoor Coil
Inlet (°FW BI
Pressure
Designation
IPsigi
542E024 542E030 54ZE036
Air T em p a t O utdoor C oil i°F D BI Air T em p a t O utdoor C oil i°FDBI Air T em p a t O utdoor C oil l°FDBI
65 70 75 BO B5 90 95 100 105 110 65 70 75 60 85 90 95 100 105 110 65 70 75 80 85 90 95 100 105 110
55 High S ide 157 174 190 207 224 240 258 276 293 313 150 166 181 196 212 226 246 264 282 302 182 196 211 227 242 259 276 294 312 332
Low Side 58 59 60 61 62 63 64 66 67 68 60 62 63 65 67 69 71 73 75 77 67 69 70 72 74 75 76 78 79 81
50 High S ide 162 179 195 212 228 244 261 279 296 315 153 169 185 200 216 230 250 268 286 306 185 199 215 231 246 263 280 298 316 336
Low Side 64 65 66 67 68 69 70 71 73 74 63 65 66 68 70 72 75 77 79 81 69 ' 71 72 74 76 77 79 80 82 83
65 High S ide 168 185 200 216 232 247 264 282 298 317 157 173 188 204 220 235 255 273 291 311 188 203 219 235 251 268 285 303 321 341
Low Side 70 71 72 73 75 76 77 78 79 80 67 69 70 72 74 76 79 81 83 85 71 73 74 76 78 80 81 83 85 86
70 High S ide 173 191 206 223 239 253 270 288 304 324 160 177 192 208 224 240 259 277 295 315 192 207 223 239 255 273 290 308 326 346
Low Side 77 78 79 80 81 82 83 84 86 87 70 72 74 76 78 80 83 85 87 89 74 76 77 79 81 83 84 86 88 89
75 High S ide 175 192 209 227 242 260 278 294 315 336 164 180 196 212 228 244 264 282 300 320 196 212 228 244 260 278 296 314 332 352
Low Side 84 85 86 87 88 90 91 93 94 95 74 76 78 80 82 84 87 89 91 93 79 81 83 84 86 88 89 91 93 95
Air Tem p at
indoor Coil
Inlet l°FW BI
Pressure
Designation
IPsigi
542E042 542E048 5420060 8 5 42E060
Air T em p a t O utdoor C oil (°F O B) Air T em p a t O utdoor C oil l°F D BI Air T em p a t O utdoor C oil l°FDB|
65 70 75 80 85 90 95 100 105 110 65 70 75 80 85 90 95 100 105 110 65 70 75 60 B5 90 95 100 105 110
55 High S ide 165 179 192 206 222 237 254 270 289 308 178 192 207 224 238 255 272 291 308 330 176 189 202 217 233 249 266 283 300 320
Low Side 60 62 63 65 67 68 70 72 74 75 61 62 63 65 66 68 70 72 74 76 59 61 62 63 65 67 68 70 72 74
60 High S ide 169 183 196 210 226 241 258 275 293 312 183 197 212 229 243 260 277 296 314 335 180 193 207 222 237 254 270 287 305 324
Low Side 64 66 67 69 70 72 74 75 77 79 65 66 67 69 70 72 74 76 78 80 63 65 66 67 68 70 71 73 75 77
65 High S ide 173 187 201 215 231 246 263 280 298 317 188 203 218 235 249 266 283 302 320 340 185 198 212 227 242 259 275 292 310 329
Low Side 68 69 71 73 74 76 78 79 81 83 69 70 71 73 74 76 78 80 82 84 67 69 70 71 72 74 75 76 78 80
70 High S ide 177 191 205 220 235 251 268 285 303 322 193 208 223 240 254 271 288 307 326 345 191 205 219 234 250 266 283 301 319 338
Low Side 72 73 75 77 78 80 82 83 85 87 73 74 '75 77 78 80 82 84 86 88 71 73 74 75 77 79 80 81 83 85
75 High S ide 181 196 210 225 240 256 273 290 308 327 198 214 229 246 260 277 294 312 332 350 198 212 227 242 258 274 292 310 328 346
Low Side 76 77 79 81 82 84 86 87 89 91 77 78 80 81 83 84 86 88 90 92 76 77 79 80 82 84 85 87 89 91
5. Evaluate system performance and refrigerant charge
level by comparing recorded readings with unit operat­
ing pressure/temperature tag.
6. When necessary, make slight adjustment to refrigerant
charge. If a substantial adjustment is indicated, deter­
mine abnormal condition in system that is causing inac­
curate readings, such as insufficient airflow across
either or both coils.
CAUTION: If it i.-^ dcri-rrniin-d thaï ihe problem i' ai; o\cr
charged or undercharged unit’when operating in the heat­
ing mode, the refrigerant system should be evacuated and
recharged by adding the exact amount of R-22 refrigerant as
shown on the unit rating plate. A volumetric charging
cvliiuler or ac'. uraie .•fcoie should be u.~ed. \V her. operating in
the cooling mode, the operatiiig pre.ssiin' tempierature tag
may be used to adjust the charge.
C. Indoor Airflow & Airflow Adjustments
Model 542D and 542E units are equipped with direct-drive
blower motors. All motors have a high- and low-speed con­
nection except for 460-V motors which have only a high­
speed connection.
The system airflow for all units (except 460-V) can be
changed, when necessary, by changing the blower motor
speed connection from the factory setting to the unused
speed connection. The factory setting is indicated on the
unit wiring label.
CAUTION: The recommended airflow is 400 to 450 ftVmin
per each 12,000 Btuh of unit capacity. Inadequate airJlmv
can cause unsatisfactory operation and performance. Cer­
tain unit./heater combinations can only be used with high
speed blower operation. See electric heater information
Table VI shows the air delivery performance of all units at
various external static pressures. Determine the airflow for
the system being installed as follows:
1. Start unit and measure static pressure in duct system at
unit.
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