5-Speed Ecm Constant Torque Motors - York YBS006-070 Installation Manual

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 variable
speed ECM Motor. Because it's an ECM Motor, the 5-speed
ECM can ramp slowly up or down like the variable speed 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.
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)
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. 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 24VAC.
Power Connection - 3/16 in. quick connects - Line 1 (orange wire)
to L, Ground (green wire) to G, Line 2 (for 208V-230V units) to N
(brown wire).
Signal Connection - 1/4 in. quick connects - Common to C, 24VAC
to Taps #1-5.
LX COMPACT SERIES INSTALLATION MANUAL
Applying 24VAC power between any of the motor taps 1-5 (1/4
in. quick connects) and common will signal the motor to run and
regulate torque at the programmed level. The tap input voltage
must be in the range 12-33VAC. The 5-speed ECM will have less
variation over the operating static pressure range versus a PSC
motor as well as a significant watts reduction due to the high
motor efficiency.
Thermal Protection - Motor is electronically protected.
Locked Rotor Amps - If motor speed decreases below a
programmed stall speed, the motor will shut down and after a delay
period, the control will attempt to restart the motor.
The 5-speed ECM speed tap selections are as follows:
The blue wire should be placed on the speed tap desired for the (G)
continuous blower setting – factory wired to Tap 1.
The red wire should be placed on the speed tap desired during
compressor operation (Y1 signal) – factory wired to Tap 3 or 4.
The gray wire is not factory wired to the motor and is tied to the
wire harness. It is field connected and can be used with 3ht/2cl
thermostats or IntelliZone to deliver the required air flow for the
Y2 signal.
The tan wire should be placed on the speed tap desired for
auxiliary heat (W signal) – factory wired to Tap 5.
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