Installing Ductwork - Johnson Controls VPC Installation, Operation & Maintenance Instructions Manual

13. INSTALLING DUCT WORK
Install all duct work to meet current
standards:
• ASHRAE/NFPA 90, Standard for Installation of
Warm air Heating and air Systems.
• State, provincial, and local codes
Failure to follow these standards could reduce air flow
or increase air leakage, resulting in reduced system
performance or unit damage.
TABLE 1 - CFM aND MOTOR SPEED SELECTION
INDOOR BLOWER CFM - VPC & VPP MODELS
Motor
Model #
Speed
HIgH
vPC/vPP**09
MED
LOW
HIgH
vPC/vPP**12
MED
LOW
HIgH
vPC/vPP**18
MED
LOW
HIgH
vPC/vPP**24
MED
LOW
INDOOR BLOWER CFM - VPH MODELS
Motor
Model #
Speed
HIgH
vPH0209
MED
2 ROW H/W COIL
LOW
HIgH
vPH0212
MED
2 ROW H/W COIL
LOW
HIgH
vPH0218
MED
2 ROW H/W COIL
LOW
HIgH
vPH0318
MED
3 ROW H/W COIL
LOW
HIgH
vPH0224
MED
2 ROW H/W COIL
LOW
HIgH
vPH0324
MED
3 ROW H/W COIL
LOW
NOTE: aLL uNITS SHIPPED FaCTORy CONNECTED aT MEDIuM SPEED
12
0.05 0.10 0.15
445 435 425
350 340 330
280 275 270
470 460 450
370 360 350
295 290 285
775 760 745
640 630 620
450 445 440
1070 1045 1020
930 920 910
820 815 810
0.05 0.10 0.15
435 425 415
340 330 320
275 270 265
460 450 440
360 350 340
290 285 280
735 715 695
620 605 590
445 440 435
700 680 660
610 595 580
440 435 430
950 930 910
890 860 840
805 800 790
910 890 870
840 815 790
790 775 760
For all units, design duct systems within the maximum
external static pressure limits indicated in Table 1.
SUPPLY AIR DUCT WORK
Duct attaching hardware must only be used on the
supply air outlet flanges. Optional electrical heater is
located under the top panel near these flanges. Do not
drill or use screws in this area.
Supply air duct (plenum) connection
must be at least the same size as the
unit supply air opening. Seal supply air
duct work to unit casing, walls, ceilings
or floors.
ExTERNaL STaTIC PRESSuRE
0.20 0.25
415 400
320 310
265 255
440 425
340 330
280 270
725 705
610 600
435 430
995 970
900 890
805 800
ExTERNaL STaTIC PRESSuRE
0.20 0.25
400 385
310 300
255 245
425 410
330 315
270 260
675 650
575 560
430 425
640 615
565 550
420 410
885 860
810 780
775 760
850 820
765 740
740 720
FORM 145.20-IOM1 (908)
0.30 0.35 0.40
385 370 355
300 285 270
245 235 220
410 395 375
315 300 285
260 245 230
685 660 635
585 570 555
420 405 390
945 915 885
875 860 840
790 780 765
0.30 0.35 0.40
370 355 335
285 270 255
235 220 205
395 375 355
300 285 270
245 230 215
625 595 565
545 525 505
415 410 395
590 560 530
530 510 495
400 390 380
835 810 780
750 720 690
740 715 685
795 770 740
715 690 660
690 660 630
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