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● Air supply diffusers must be selected and located carefully. They must be sized and positoined to deliver treated air along the
perimerter 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 blower. If they are too small, they also cause noise.
● The installers should balance the air distribution system to ensure proper quiet airflow to all rooms in the home. This ensures
a comfortable living space.
● An air velocity meter or airflow hood can give a reading of system CFM.
● During installation, installer should select the air speed according to the actual setting static pressure. Please refer to the
Table 7-1 AIRFLOW PERFORMANCE DATA
Table 7-3 Electric Heat Pressure Drop Tables(IN.W.C)
Small Cabinet:24K,30K,36K
STATIC
900
5kW
0.05
0.05
7.5kw
10kW
0.05
15kW
/
Large Cabinet:42K,48K,60K
STATIC
1500
5kW
0.1
7.5kw
0.1
10kW
0.1
/
15kW
20kW
/
Table 7-4 Refrigerant charge for H/P system
24
Cooling Mode
Mode
55
De Refroidissement
165
161
157
153
149
145
141
256
137
251
133
246
129
241
125
236
121
231
117
226
113
221
109
216
105
211
STANDARD CFM（SCFM）
1000
1100
0.05
0.05
0.05
0.05
0.05
0.05
/
0.1
STANDARD CFM（SCFM）
1600
1700
1800
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.15
0.15
/
0.2
0.2
/
0.2
0.2
Cooling Charge Chart/Tableau De Charge de Refroidissement
Outdoor Ambient Temperature(oF)/Temperature Amdiante Exterieure(en oF)
60
65
70
75
High Pressure Service Port (psig)/Vanne Détecté de Pression Haute(en psig)
303
316
328
300
313
325
310
322
297
319
282
294
307
279
291
304
316
275
287
300
312
272
284
297
309
268
280
293
305
264
276
289
301
260
272
285
297
256
268
281
293
252
264
277
289
248
260
273
285
244
256
269
281
252
265
277
240
261
273
236
248
14
1200
1300
0.05
0.05
0.05
0.05
0.05
0.05
0.1
1900
2000
0.15
0.15
0.15
0.15
0.15
0.15
0.2
0.2
0.2
0.2
80
85
90
95
100
350
370
400
426
446
346
366
394
421
440
342
362
389
415
434
339
358
384
410
428
353
374
399
419
335
393
416
331
349
370
413
328
346
368
389
324
343
365
386
410
321
340
361
382
406
317
336
357
378
403
313
332
353
374
399
309
328
349
370
395
305
324
345
366
392
301
320
341
362
388
297
316
337
358
385
293
312
333
354
381
1400
0.1
0.1
0.1
0.1
0.1
2100
2200
0.15
0.15
0.15
0.15
0.15
0.15
0.2
0.2
0.2
0.25
105
110
115
465
487
508
459
481
503
453
476
499
446
471
496
443
468
493
440
465
490
437
462
486
459
483
434
479
430
455
427
451
475
423
447
471
420
444
467
417
440
463
414
437
459
411
433
455
408
429
450
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