Orifice Size And Manifold Pressure - International comfort products R9MSB Service And Technical Support Manual

Table 4 − Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate (Cont.)
(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2%/1000 FT (305M) ABOVE SEA LEVEL)
ALTITUDE
RANGE
HEAT VALUE
AT ALTITUDE
ft (m)
7001
(2134)
to
8000
(2438)
8001
(2439)
to
9000
(2743)
9001
(2744)
to
10000
(3048)
* Orifice numbers shown in BOLD are factory-installed.
RETURN AIR
SIZE CONNECTION
0601716B SIDE/BOTTOM
0801716A
(A Series SIDE/BOTTOM
Only)
0801716B
(B Series
SIDE/BOTTOM
Only)
BOTTOM or
1002120B
4,5
TWO−SIDES
BOTTOM or
1202420B
4,5
TWO−SIDES
12
SINGLE-STAGE FURNACE
A V G . G A S
0.58
Orifice Manifold
(Btu/cu ft) No. Pressure
650 42 3.4
675 43 3.8
700 43 3.5
725 44 3.8
750 44 3.5
775 44 3.3
800 44 3.1
825 44 2.9
625 42 3.4
650 43 3.8
675 43 3.5
700 44 3.7
725 44 3.5
750 44 3.3
775 44 3.0
600 42 3.3
625 43 3.7
650 43 3.5
675 44 3.7
700 44 3.4
725 44 3.2
Table 5 – Air Delivery − CFM (With Filter)
WIRE
LEAD
COOLING CFM
COLOR
TONS /TON
Black 4.0 376
Yellow 3.5 377
3
Blue 3.0 387
3
Red 2.5 394
Black 4.0 408
Yellow 3.5 386
Orange 3.0 390
Blue 2.5 404
3
Red 2.0 390
Black 4.0 389
Yellow 3.5 381
Orange 3.0 383
Blue 2.5 384
3
Red 2.0 380
Black 5.0 394
Yellow 5.0 367
Blue 4.0 416
Red 3.5 421
Black 5.0 410
Yellow 5.0 369
Blue 4.0 416
3
Red 3.5 414
Specifications subject to change without notice.
S P E C F I C I G R A V T I Y O F N
0.60
Orifice Manifold Orifice
No. Pressure No.
42 3.5 42
42 3.2 42
43 3.7 43
43 3.4 43
44 3.7 44
44 3.4 44
44 3.2 44
44 3.0 44
42 3.5 42
42 3.2 42
43 3.6 43
43 3.4 43
44 3.6 44
44 3.4 44
44 3.2 44
42 3.4 42
42 3.2 42
43 3.6 43
44 3.8 43
44 3.5 44
44 3.3 44
TEST AIRFLOW DELIVERY @ VARIOUS EXTERNAL STATIC PRESSURES
0.1 0.2 0.3 0.4
1600 1545 1505 1475
1380 1340 1335 1330
1190 1185 1195 1195
1030 1025 1030 1010
1800 1770 1735 1685
1445 1430 1410 1385
1250 1240 1225 1200
1090 1080 1060 1035
880 860 835 810
1650 1620 1640 1605
1420 1425 1400 1370
1205 1205 1185 1165
1035 1020 1005 985
850 825 805 785
2270 2205 2130 2055
2090 2040 1980 1910
1850 1815 1775 1725
1580 1550 1540 1515
2385 2310 2230 2150
2130 2070 2010 1940
1875 1840 1795 1735
1610 1585 1555 1515
A T U R A L G A S
0.62 0.64
Manifold Orifice Manifold
Pressure No. Pressure
3.6 42
3.3 42
3.8 42
3.5 43
3.8 43
3.5 44
3.3 44
3.1 44
3.6 42
3.3 42
3.7 42
3.5 43
3.7 44
3.5 44
3.3 44
3.6 42
3.3 42
3.7 43
3.4 43
3.7 44
3.4 44
0.5 0.6 0.7 0.8
1505 1445 1400 1330
1320 1285 1225 1155
1160 1125 1075 1015
985 940 905 855
1630 1570 1495 1415
1350 1305 1255 1195
1170 1130 1090 1040
1010 970 930 885
780 750 710 665
1555 1495 1425 1345
1335 1290 1230 1170
1150 1100 1055 1000
960 930 895 845
760 725 695 655
1970 1880 1780 1670
1835 1755 1670 1570
1665 1600 1525 1435
1475 1420 1355 1280
2050 1920 1780 1650
1845 1740 1630 1525
1665 1580 1495 1410
1450 1395 1325 1250
440 04 6601 01
3.7
3.4
3.2
3.6
3.4
3.7
3.4
3.2
3.7
3.4
3.2
3.6
3.8
3.6
3.4
3.7
3.4
3.8
3.5
3.8
3.5
A11253B
0.9 1
1235 1140
1085 1000
950 885
805 735
1330 1230
1120 1045
975 910
835 765
615 560
1255 1165
1095 1015
935 870
795 735
600 545
1555 1425
1460 1340
1335 1225
1190 1100
1540 1415
1420 1305
1310 1205
1160 1080