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f The air distribution system has the greatest effect on airflow . The duct system is totally controlled by the contractor . For
X
this reason, the contractor should use only industry-recognized procedures .
f Duct design and construction should be carefully done . System performance can be lowered dramatically through bad
X
planning or workmanship .
f Air supply diffusers must be selected and located carefully . They must be sized and positioned to deliver treated air along
X
the perimeter of the space . If they are too small for their intended airflow, they become noisy . If they are not located
properly, they cause drafts . Return air grilles must be properly sized to carry air back to the fan . If they are too small, they
also cause noise .
f The installers should balance the air distribution system to ensure proper quiet airflow to all rooms in the home . This
X
ensures a comfortable living space .
f An air velocity meter or airflow hood can give a reading of system CFM .
X
f When installation, installer should select the air speed according to the actual setting static pressure . Please refer to the
X
Table 4 ~ 5 .
Refrigerant charge for A/C system
<Table 6>
AK036HARDCC
Cooling Mode
Suction Pressure at Large
Service Valve (psig)
Rooftop_ODM_IBIM_EN_2020001B8001.indd 31
12.8 15.6 18.3 21.1 23.9 26.7 29.4 32.2
Liquid Pressure at Small Service Valve (psig)
165
295
317
161
293
315
157
291
313
153
267
289
311
149
265
287
309
145
263
285
307
141
240
261
283
305
137
238
259
281
303
133
236
257
279
301
129
234
255
277
299
125
232
253
275
297
121
230
251
273
295
117
228
249
271
293
113
226
247
269
291
109
224
245
267
289
105
222
243
265
287
ENGLISH-31
Cooling Charge Chart
Outdoor Ambient Temperature (°C)
35
338
360
383
405
428
336
358
381
403
426
334
356
379
401
424
332
354
377
399
422
330
352
375
397
420
328
350
373
395
418
326
348
371
393
416
324
346
369
391
414
322
344
367
389
412
320
342
365
387
410
318
340
363
385
408
316
338
361
383
406
314
336
359
381
404
312
334
357
379
402
310
332
355
377
400
308
330
353
375
398
37.8 40.6 43.3 46.1
455
482
508
535
453
480
506
533
451
478
504
531
449
476
502
529
447
474
500
527
445
472
498
525
443
470
496
523
441
468
494
521
439
466
492
519
437
464
490
517
435
462
488
515
433
460
486
513
431
458
484
511
429
456
482
509
427
454
480
507
425
452
478
505
2014-06-11 오후 8:07:25
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