Installation manual
035-19599-001 Rev. A (1103)
Unitary Products Group 25
NOTES:
1. Airflow expressed in standard cubic feet per minute (CFM) and in cubic meters per minute (m
3
/min).
2. Airflows above 1800 CFM (50.97 m
3
/min) require either return from two sides or one side plus bottom.
3. Motor voltage at 115 V.
FILTER PERFORMANCE
The airflow capacity data published in Table 13 represents blower per-
formance WITHOUT filters. To determine the approximate blower per-
formance of the system, apply the filter drop value for the filter being
used or select an appropriate value from the Table 14.
NOTE: The filter pressure drop values in Table 14 are typical values for
the type of filter listed and should only be used as a guideline.
Actual pressure drop ratings for each filter type vary between fil-
ter manufacturers.
* Hogs Hair Filters are the type supplied with furnace (if supplied).
TABLE 16:
Blower Performance CFM
SINGLE SIDE RETURN (WITHOUT FILTER)
MODELS
Speed
Tap
EXTERNAL STATIC PRESSURE, INCHES W.C. (kPa)
Input/Output/
Airflow/cabinet
0.1 0.025 0.2 0.050 0.3 0.075 0.4 0.099 0.5 0.124 0.6 0.149 0.7 0.174 0.8 0.199 0.9 (0.224 1.0 0.249
CFM
m
3
/min
CFM
m
3
/min
CFM
m
3
/min
CFM
m
3
/min
CFM
m
3
/min
CFM
m
3
/min
CFM
m
3
/min
CFM
m
3
/min
CFM
m
3
/min
CFM
m
3
/min
40/37/1000/"A"
High
1400 39.64 1350 38.23 1300 36.81 1250 35.40 1200 33.98 1135 32.14 1060 30.02 970 27.47 880 24.92 765 21.66
Med-High 970 27.47 955 27.04 945 26.76 935 26.48 915 25.91 885 25.06 840 23.79 780 22.09 705 19.96 600 16.99
Med-Low 770 21.80 760 21.52 750 21.24 735 20.81 710 20.10 680 19.26 640 18.12 595 16.85 535 15.15 450 12.74
Low 595 16.85 585 16.57 575 16.28 560 15.86 540 15.29 520 14.72 485 13.73 455 12.88 400 11.33 270 7.65
60/55/1200/"B"
80/75/1200/”B”
High
1605 45.45 1590 45.02 1570 44.46 1545 43.75 1510 42.76 1470 41.63 1415 40.07 1360 38.51 1285 36.39 1205 34.12
Med 1260 35.68 1245 35.25 1225 34.69 1205 34.12 1180 33.41 1150 32.56 1110 31.43 1065 30.16 1005 28.46 930 26.33
Low 930 26.33 915 25.91 895 25.34 880 24.92 860 24.35 835 23.64 810 22.94 770 21.80 695 19.68 620 17.56
80/75/1600/"C"
High
2030 57.48 1980 56.07 1925 54.51 1870 52.95 1830 51.82 1755 49.70 1675 47.43 1600 45.31 1515 42.90 1435 40.63
Med 1505 42.62 1490 42.19 1475 41.77 1460 41.34 1440 40.78 1420 40.21 1380 39.08 1340 37.94 1280 36.25 1215 34.40
Low 1295 36.67 1285 36.39 1260 35.68 1240 35.11 1215 34.40 1190 33.70 1160 32.85 1130 32.00 1080 30.58 1000 28.32
100/95/2000/"C"
High
2330 65.98 2270 64.28 2200 62.30 2130 60.31 2060 58.33 1985 56.21 1890 53.52 1810 51.25 1710 48.42 1625 46.01
Med 2005 56.78 1965 55.64 1920 54.37 1870 52.95 1820 51.54 1750 49.55 1680 47.57 1600 45.31 1500 42.48 1395 39.50
Low 1580 44.74 1560 44.17 1535 43.47 1510 42.76 1480 41.91 1440 40.78 1390 39.36 1325 37.52 1255 35.54 1175 33.27
120/112/2000/"D"
High
2335 66.12 2280 64.56 2215 62.72 2145 60.74 2065 58.47 2000 56.63 1905 53.94 1820 51.54 1720 48.70 1620 45.87
Med 1975 55.93 1930 54.65 1885 53.38 1830 51.82 1775 50.26 1720 48.70 1655 46.86 1580 44.74 1500 42.48 1400 39.64
Low 1515 42.90 1495 42.33 1475 41.77 1450 41.06 1415 40.07 1380 39.08 1330 37.66 1275 36.10 1210 34.26 1135 32.14
TABLE 17:
Filter Performance - Pressure Drop Inches W.C. and (kPa)
AIRFLOW
RANGE
MINIMUM OPENING SIZE
FILTER TYPE
DISPOSABLE HOGS HAIR* PLEATED
1 Opening 2 Openings 1 Opening 2 Opening 1 Opening 2 Opening 1 Opening 2 Opening
Sq. in.
m
2
Sq. in.
m
2
In w.c. Pa In w.c. Pa In w.c. Pa In w.c. Pa In w.c. Pa In w.c. Pa
0 - 750 230 .15
0.01 2.5 0.01 2.5 0.15 37
751 - 1000 330 .21 0.04 10 0.03 7.5 0.20 50
1001 - 1250 330 .21 0.08 20 0.07 17 0.20 50
1251 - 1500 330 .21 0.08 20 0.07 17 0.25 62
1501 - 1750 380 .25 658 .42 0.14 35 0.08 20 0.13 32 0.06 15 0.30 75 0.17 42
1751 - 2000 380 .25 658 .42 0.17 42 0.09 22 0.15 37 0.07 17 0.30 75 0.17 42
2001 & Above 463.30658.420.17420.09220.15370.07170.30750.1742