Air Delivery - Cfm - Carrier N96MSN Installation, Start-Up, Operating And Service And Maintenance Instructions

N96MSN: Installation, Start-up, Operating and Service and Maintenance Instructions
Example 2
A direct-vent 60,000 BTUh furnace installed at 2100 ft. (640M). Venting system includes FOR EACH PIPE:
100 feet (30 M) of vent pipe, 95 feet (29 M) of combustion air inlet pipe, (3) 90º long-radius elbows, and a polypropylene concentric vent kit. Also
includes 20 feet (6.1 M) of flexible polypropylene vent pipe, included within the 100 feet (30 M) of vent pipe.
VERIFY FROM POLYPROPYLENE VENT MANUFACTURER'S INSTRUCTIONS for the multiplier correction for flexible vent pipe.
Can this application use 60mm o.d. (2") polypropylene vent piping? If not, what size piping can be used?
Measure the required linear length of RIGID air inlet and vent pipe; insert the longest of
the two here: 100 ft. Of rigid pipe - 20 ft. Of flexible pipe
Add equiv length of (3) 90º long-radius elbows (use the
highest number of elbows for either the vent or inlet pipe)
Add equiv length of 45º long-radius elbows
(use the highest number of elbows for either the vent or
inlet pipe)
Add equiv length of factory concentric vent term
Add correction for flexible vent pipe, if any
* VERIFY FROM VENT MANUFACTURER'S INSTRUCTIONS; For example only, assume 1 meter of
flexible 60mm (2") or 80mm (3") polypropylene pipe equals 2.0 meters (6.5 ft.) of PVC/ABS pipe.
Total Equivalent Vent Length (TEVL)
Maximum Equivalent Vent Length (MEVL)
Is TEVL less than MEVL?
Maximum Equivalent Vent Length (MEVL)
Is TEVL less than MEVL?

AIR DELIVERY - CFM

Airflow
Unit Size
Setting
1 Cont. Fan
2
3
4
5
6
7
8
9
0261410
10
11
12
13
14
15
16
17
18
1 Cont. Fan
2
3
4
5
6
7
8
9
0401410
10
11
12
13
14
15
16
17
18
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
3
0
9
2*
Table 18 – Air Delivery - CFM (with filter)
Default
Setting
0.1 0.2
470 395
510 445
535 470
560 495
595 535
Heat 620 560
665 605
705 650
745 695
785 735
820 775
855 810
890 845
945 905
980 940
1025 985
1065 1030
Cooling 1115 1080
390 335
405 355
455 405
485 440
530 485
565 525
600 560
645 605
Heat 705 665
720 685
760 730
820 785
865 835
910 885
965 935
1005 975
1055 1025
Cooling 1100 1075
= 80 ft.(24 M)
x 5 ft.(1.5 M) = 15 ft.(4.6 M)
x = 0 ft.(0 M)
x 3.3 ft(0.9 M) = 30 ft.(9 M)
x 20 ft.(6.1 M) = 40 ft.(12.2 M)
165 ft.(50 M) Add all of the above lines
95 ft.(29 M)
185 ft.(57 M) For 3" pipe from
External Static Pressure (IN.W.C.)
0.3 0.4 0.5
320 250 175
370 305 240
400 335 275
430 365 310
470 405 350
500 435 375
550 490 430
600 540 480
645 590 535
685 635 585
730 680 630
765 720 675
800 755 710
860 820 775
900 860 820
950 910 870
995 955 920
1045 1010 970
275 215 155
300 240 185
355 305 250
390 345 295
440 395 350
485 440 400
520 480 440
570 530 495
630 595 560
650 615 580
695 660 630
755 725 690
805 775 745
855 825 800
905 880 855
950 925 900
1000 975 950
1050 1025 1000
48
Use length of the longer of the vent
or air inlet piping system
Example from polypropylene vent
manufacturer's instructions, Verify from
vent manufacturer's instructions.
For 2" pipe from Table 14
Therefore, 60mm (2") pipe may NOT be
NO
used; try 80mm (3")
Table 14
YES Therefore, 80mm (3") pipe MAY be used
0.6 0.7 0.8
- - -
165 - -
200 130 -
245 170 -
295 225 155
320 265 195
380 330 270
430 380 335
480 435 385
530 480 435
575 525 485
620 570 525
665 615 570
735 690 640
780 735 690
830 795 750
880 845 805
935 900 865
- - -
125 - -
200 140 -
245 190 140
300 255 205
355 310 270
400 360 320
455 415 375
525 490 455
545 515 480
595 560 530
660 630 600
715 690 660
770 740 710
825 800 770
870 845 820
925 900 875
980 955 930
0.9 1
- -
- -
- -
- -
- -
130 -
205 140
280 215
340 285
390 350
440 400
485 445
530 490
595 560
645 605
710 665
760 720
825 785
- -
- -
- -
- -
155 -
220 170
275 230
335 300
415 380
440 405
495 460
570 535
630 600
685 655
745 715
795 765
850 825
905 880