Carrier MODU-PAC 50DF - Manual (Page 9)

SctectlOîî procedure (with example)
1 Determine cooling and heating requirements at design SHC of 236,000 Btuh. Calculate SHC correction, if
conditions. required, using notes under cooling capacities tables
Given III Select heating capacity of unit to provide design condi-
Required Cooling Capacity (TC) ....................... 300,000 Btuh ^ion requirement.
Sensible Heat Capacity (SHC) ............................ 236,000 Btuh In the Heating Capacities table, note that unit 50DF028 with
Required Heating Capacity ................................ 240,000 Btuh 73 kw heaters will provide 249150 Btuh
Condenser Entering Air Temperature ........................... 95 F c j j •
Indoor Air Temperature .... ................... 80 F edb, 67 F ewb Determine fan speed and power requirements at design
Evaporator Air Quantity...................................... 10,000 cfm conditions.
External Static Pressure ....................................... 1 80 in wg f^an Performance table at 10,000 cfm and 1 80 in wg
Electrical Characteristics (V-Ph-Hz) .............. 460-3-60 ^^at the fan speed is 1210 rpm and the power required is
II Select unit based on required cooling capacity >^P
Enter Cooling Capacities table at condenser entering ^ Select unit that corresponds to power source available,
temperature of 95 F Unit 50DF028 at 10,000 cfm and 67 F The Electrical Data table shows that a 460-3-60 unit is available,
ewb will provide a total capacity of 308,000 Btuh and a
Performance data
COOLING CAPACITIES
50DF024
m
50DF028
Temp (F)
Air Ent
6000/.042
Evap Air — Cfm/BF
; SOOOAOy____{
Evap Air — Ewb (F)
9000/.070
Temp (F)
Air Ent
72 67 62 72 67 62 72 67 62 72 67 62 72 67 62 72 67 62
TC 266 243 220 278 255 233 283 260 237 TC 345 318 294 351 322 298 355 327 302
85 SHC 132 165 197 147 191 231 157 206 237 85 SHC 178 229 278 185 242 296 194 253 302
KW 21.3 20.1 19 0 22.0 20.8 19.6 22.4 21.1 20.0 KW 29.5 27.8 26.2 30.0 28 2 25.4 30.2 28 4 26.6
TC 250 228 206 263 239 218 268 243 222 TC 330 303 278 335 308 283 339 312 287
95 SHC 127 159 191 142 184 218 153 198 222 95 SHC 174 223 272 181 236 283 190 248 287
KW 22.6 1 2l;6 20.1 23.4 22.0 20.8 23.7 22.5 21.1 KW 31 2 29.3 27.7 31.4 29.5 28.2 ! 31.7 30.1 28.5
TC 243 221 201 255 232 212 260 236 216 TC 320 295 271 325 299 275 329 303 279
100 SHC 124 157 189 139 182 212 150 196 216 100 SHC 171 220 268 178 233 275 187 245 279
KW 23 2 22 2 20 7 24 0 22.8 21 4 24 3 23 1 21 7 KW 32 7 30 4 29 0 33 1 30.8 29 2 33 3 31 3 29 6
TC 236 214 195 247 225 206 251 229 210 TC 310 286 263 315 290 267 318 294 270
105 SHC 122 154 186 137 179 206 147 192 210 105 SHC 168 216 263 176 229 267 183 242 270
KW 23 9 22 6 21 4 24.6 23.4 22.1 24.9 23.7 22.3 KW 34 0 31 7 29 9 34.4 32 1 30.2 24 7 32 3 30 5
TC 227 207 188 238 216 198 241 220 202 TC 300 277 255 305 281 259 309 284 262
110 SHC 119 151 183 135 176 198 144 189 202 110 SHC 165 213 255 171 226 259 180 239 262
KW 24 8 23 2 22 0 25 3 24 1 22 5 25 6 24 4 22 8 KW 35 3 33 1 31 0 35 5 33 4 31 2 35 7 33 6 31 7
Evap Air — Cfm/BF
9000/.058 ! 10,000/.068~T 11,000/ 074
Evap Air — Ewb (F)
50DF034 50DF044
Temp (F)
Air Ent
Cond
Evap Air — Cfm/BF
10,000/.068 12,000/.082 | 13,500/ 088
Evap Air — Ewb (F)
Temp (F)
Air Ent
Evap Air — Cfm/BF
14.000/051 ^ 16,000/.062 i 18,000/.070
Evap Air — Ewb (F)
72 67 62 72 67 62 72 67 62 72 67 62 72 67 62 72 67 62
TC 412 380 349 424 391 360 430 397 366 TC 538 499 457 549 507 468 558 515 476
85 SHC 214 266 321 226 292 356 240 311 366 85 SHC 281 357 436 295 383 468 312 408 476
KW 32 0 30 7 29 3 33.2 31.5 29.7 33.5 31 8 29 9 KW 43.7 41 8 39 5 45.1 42.5 33.8 45 4 42 9 40 6
TC 392 360 332 401 370 342 408 376 347 TC 506 465 427 516 475 436 524 481 445
95 SHC 203 258 315 218 283 342 231 303 347 95 SHC 269 345 419 285 369 436 301 394 445
KW 34 7 33 4 31 5 35.3 33.8 31.8 36 2 34 4 32 4 KW 46.8 43.7 41.0 47.1 44,5 41 8 47 5 45 0 42 7
TC 383 352 323 392 361 334 399 367 339 TC 491 450 411 499 460 420 506 466 428
100 SHC 200 255 311 214 280 334 227 300 339 100 SHC 263 339 411 280 364 420 295 390 428
KW 35 9 34 6 32 6 37 1 35.0 33 2 37 5 35 7 33 6 KW 47 9 45 0 42 5 48 3 45.6 43 1 48 7 46 2 44 1
TC 373 344 316 384 353 325 390 358 330 TC 475 436 397 483 444 405 490 450 412
105 SHC 197 252 308 211 278 325 222 297 330 105 SHC 258 333 397 275 358 405 290 383 412
KW 37 4 35 8 34 2 38.1 36 2 34 6 38 7 36 8 34 8 KW 49 2 46 6 43 6 49.8 47 1 443 50 6 47 5 45 2
TC 354 326 299 363 335 308 370 340 312 TC 458 419 380 '465" ■ 427 ""388‘ 473 433 395
110 SHC 191 245 299 206 271 308 215 291 312 110 SHC 252 326 380 269 353 388 283 377 395
KW 39 3 37 8 36 0 39.9 38 3 36.6 40 5 38 5 36 9 KW 50 8 47 9 45 2 51 3 48.5 46.0 51 7 49 0 46 8