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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)

Blower Performance Data

S i Bl S d S d ECM

Dual Capacity with 5-Speed ECM

Model

Motor

Speed

Motor

Tap

T’stat

Cnct.

Blower

Size

Motor

Airflow (cfm) at External Static Pressure (in. wg)

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.6 0.7 0.8 0.9 1.00

024

High 5 W

9 x 7 1/2

1024 1013 1002 988 974 963 951 940 929 901 872 785 691 - - -

Med High 4 Y2 932 917 902 892 882 867 851 842 832 817 802 756 661 - - -

Med 3 835 826 816 801 785 772 759 749 738 719 700 677 636 - - -

Med Low 2 Y1 765 747 729 720 710 696 681 662 643 627 611 581 515 - - -

Low 1 G 665 656 647 626 605 593 580 561 541 519 496 443 392 - - -

036

High 5 W

9 x 7 1/2

1325 1319 1313 1293 1272 1242 1212 1158 1103 1058 1013 930 839 - - -

Med High 4 Y2 1279 1267 1254 1238 1222 1203 1184 1137 1089 1049 1008 926 836 - - -

Med 3 1229 1218 1206 1187 1167 1154 1140 1110 1079 1044 1008 929 829 - - -

Med Low 2 Y1 1201 1184 1167 1156 1145 1129 1113 1086 1058 1028 997 914 808 - - -

Low 1 G 1007 989 971 958 945 925 904 889 873 862 850 818 778 - - -

048

High 5 W

11 x 10 1

1890 1874 1857 1845 1833 1809 1784 1769 1754 1736 1718 1672 1629 1601 1562 1522

Med High 4 Y2 1769 1754 1739 1721 1703 1685 1666 1645 1623 1604 1585 1539 1499 1463 1432 1376

Med 3 1671 1652 1632 1614 1595 1576 1557 1536 1514 1494 1474 1430 1387 1351 1313 1173

Med Low 2 Y1 1574 1555 1535 1514 1492 1472 1452 1431 1410 1387 1363 1330 1284 1236 1108 1014

Low 1 G 1388 1370 1352 1322 1292 1264 1236 1216 1195 1178 1161 1095 984 916 842 787

060

High 5 W

11 x 10 1

2077 2066 2055 2044 2033 2017 2000 1966 1931 1904 1877 1841 1810 1791 1740 1653

Med High 4 Y2 1948 1937 1925 1910 1895 1880 1865 1831 1797 1778 1759 1720 1707 1680 1660 1612

Med 3 1810 1794 1778 1739 1700 1684 1667 1657 1646 1629 1612 1576 1583 1547 1510 1480

Med Low 2 Y1 1680 1667 1653 1618 1583 1562 1540 1522 1503 1488 1473 1465 1449 1410 1369 1319

Low 1 G 1594 1572 1550 1512 1474 1450 1426 1410 1393 1385 1376 1351 1325 1290 1168 1085

072

High 5 W

11 x 10 1

2402 2388 2373 2358 2343 2334 2325 2307 2289 2274 2258 2215 2177 2125 2052 1933

Med High 4 Y2 2209 2193 2177 2164 2151 2135 2118 2105 2092 2072 2052 2017 1982 1954 1925 1844

Med 3 2085 2072 2058 2045 2031 2010 1989 1972 1954 1936 1918 1881 1852 1821 1790 1751

Med Low 2 Y1 1961 1951 1940 1926 1911 1885 1859 1844 1829 1814 1798 1759 1727 1703 1670 1636

Low 1 G 1767 1751 1735 1715 1694 1678 1661 1640 1619 1602 1584 1548 1512 1475 1426 1397

Factory speed settings are in Bold 7/30/14

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.

345

AUX - Gray

G - Blue

Y1 - Red

Y2 - Tan

C - Black

L - Orange

G - Green

N - Brown

High Voltage

Connections

3/16 in.