York YAFT026, Installation Manual

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5-Speed ECM Constant Torque Motors
The 5-Speed ECM is a ‘Constant Torque’ ECM motor and delivers
air flow similar to a PSC but operates as efficiently as an ECM Motor.
Because it’s an ECM Motor, the 5-Speed ECM can ramp slowly up or
down like the ECM motor. There are 5 possible speed taps available
on the 5-Speed ECM motor with #1 being the lowest airflow and #5
being the highest airflow. These speed selections are preset at the
time of manufacture and are easily changed in the field if necessary.
If more than one tap are energized at the same time, built in logic
gives precedence to the highest tap number and allows air flow to
change with G, Y1, Y2 and W signals or with Fan, CC, CC2, and
E1 output signals. Each of those 5 speeds has a specific ‘Torque’
value programmed into the motor for each speed selection. As
static pressure increases, airflow decreases resulting in less
torque on the rotor. The motor responds only to changes in torque
and adjusts its speed accordingly.
The 5-Speed ECM motor is powered by line voltage but the motor
speed is energized by 24 VAC.
5-Speed ECM Benefits:
- High efficiency
- Soft start
- 5 speeds with up to 4 speeds on-line
- Built in logic allows air flow to change with G, Y1, Y2
and W signals
- Super efficient low airflow continuous blower setting (G)
Single Speed Unit with 5-Speed ECM Motor
Model
Motor
Speed
Motor
Tap
T’stat
Cnct.
Blower
Size
Motor
HP
Airflow (cfm) at External Static Pressure (in. wg)
0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90 1.00
022
High 5 W
9 x 7 1/2
980 960 940 930 920 905 890 875 860 840 820 800 745 - - -
Med High 4 Y1 890 878 865 845 825 813 800 785 770 753 735 710 665 - - -
Med 3 830 815 800 788 775 755 735 723 710 690 670 640 600 - - -
Med Low 2 G 780 760 740 703 665 653 640 620 600 585 570 - - - - -
Low 1 625 593 560 535 510 495 480 455 430 410 390 - - - - -
030
High 5
9 x 7 1/2
1407 1381 1354 1327 1300 1267 1233 1201 1168 1131 1094 1009 - - - -
Med High 4 W 1146 1134 1122 1111 1099 1085 1071 1062 1052 1042 1031 966 - - - -
Med 3 Y1 1023 1012 1001 985 969 959 949 937 925 913 901 - - - - -
Med Low 2 978 962 946 934 922 907 891 882 872 858 843 - - - - -
Low 1
G 795 777 759 748 737 718 698 686 673 650 626 - - - - -
036
High 5 W
11 x 10 1/2
1530 1503 1476 1453 1429 1413 1397 1376 1355 1342 1329 1276 1231 1173 - -
Med High 4 Y1 1413 1388 1363 1342 1321 1303 1285 1263 1240 1226 1212 1173 1016 946 - -
Med 3 1355 1325 1294 1276 1258 1235 1212 1188 1164 1144 1123 982 909 883 - -
Med Low 2 1336 1299 1261 1242 1222 1202 1181 1157 1132 1111 1090 937 874 830 - -
Low 1 G 1243 1182 1121 1061 1000 964 928 856 784 744 703 647 592 - -
042
High 5
11 x 10 1
1934 1910 1886 1871 1855 1827 1799 1780 1760 1747 1734 1700 1659 1617 - -
Med High 4 W 1799 1783 1767 1744 1720 1693 1666 1649 1631 1617 1603 1560 1530 1492 - -
Med 3 1694 1680 1666 1642 1617 1592 1567 1552 1537 1519 1500 1453 1421 1372 - -
Med Low 2 Y1 1575 1560 1540 1520 1502 1487 1471 1448 1424 1409 1393 1351 1308 1266 - -
Low 1 G 1454 1406 1358 1333 1308 1285 1261 1239 1217 1198 1179 1072 1002 988 - -
048
High 5
11 x 10 1
1934 1910 1886 1871 1855 1827 1799 1780 1760 1747 1734 1700 1659 1617 - -
Med High 4 W 1799 1783 1767 1744 1720 1693 1666 1649 1631 1617 1603 1560 1530 1492 - -
Med 3 Y1 1694 1680 1666 1642 1617 1592 1567 1552 1537 1519 1500 1453 1421 1372 - -
Med Low 2 1575 1560 1540 1520 1502 1487 1471 1448 1424 1409 1393 1351 1308 1266 - -
Low 1 G 1454 1406 1358 1333 1308 1285 1261 1239 1217 1198 1179 1072 1002 988 - -
060
High 5 W
11 x 10 1
2245 2230 2214 2194 2173 2155 2136 2120 2103 2087 2070 2032 1998 1957 1910 1825
Med High 4 2092 2073 2054 2035 2015 1995 1975 1958 1940 1922 1904 1880 1843 1806 1767 1728
Med 3 1951 1931 1910 1889 1868 1850 1831 1812 1793 1774 1755 1722 1688 1654 1612 1562
Med Low 2 Y1 1812 1796 1780 1761 1741 1718 1695 1682 1668 1651 1633 1591 1555 1518 1480 1433
Low 1 G 1682 1661 1640 1616 1591 1573 1555 1533 1510 1495 1480 1441 1400 1351 1316 1263
070
High 5 W
11 x 10 1
2472 2454 2435 2414 2393 2371 2349 2328 2306 2289 2271 2230 2189 2121 2033 1936
Med High 4 Y1 2271 2248 2225 2205 2184 2166 2147 2129 2110 2094 2078 2039 2011 1977 1930 1846
Med 3 2133 2115 2096 2072 2047 2030 2013 1996 1979 1965 1950 1909 1873 1837 1793 1748
Med Low 2 2008 1985 1962 1939 1915 1898 1880 1862 1843 1828 1812 1774 1742 1703 1669 1635
Low 1 G 1806 1784 1761 1742 1722 1696 1669 1656 1642 1625 1607 1564 1527 1490 1443 1404
Factory speed settings are in Bold
Air flow values are with dry coil and standard filter
For wet coil performance first calculate the face velocity of the air coil (Face Velocity [fpm] = Airflow [cfm] / Face Area [sq ft]).
Then for velocities of 200 fpm reduce the static capability by 0.03 in. wg, 300 fpm by 0.08 in. wg, 400 fpm by 0.12in. wg., and 500 fpm by 0.16 in. wg.
Highest setting is for auxiliary heat (W) and lowest setting is for constant blower (G). The “Y1” and “Y2” settings must be between the
“G” and “W” settings.
The gray wire is not factory wired to the motor and is tied to the wire harness. This wire can be field connected and can be used with 3HT/2CL
thermostats or IntelliZone2 to deliver the required air flow for the Y2 signal.
6/14/12
Blower Performance Data cont.
AFFINITY & AFFINITY ADVANCED SINGLE & DUAL CAPACITY SERIES INSTALLATION MANUAL