Regal-Beloit GE ECM X13 - Page 79

© 2006 GE ECM by Regal-Beloit - 77 - Indoor Blower Motors v0.2
The Control Inputs (Low Voltage) to the motor connect through the 1/4” terminals.
Terminal (C) is used for common and terminals 1-5 are used to select airflow
settings programmed into the motor.
The X13 motor is programmed to provide airflow according to the manufacturers
specifications of the torque required to create the airflow needed for each tap
selection from lab testing.
Example 1 – If tap 1 is to provide airflow for the furnace and the torque needed to
provide the airflow for a proper temperature rise in that furnace is 76% of the
maximum torque ability of the motor that will be the value programmed into the tap.
Example 2 – If tap 2 is to provide the airflow for a connected air conditioner and the
torque needed to provide the airflow for a specified tonnage of cooling is 88% of the
maximum torque ability of the motor that will be the value programmed into the tap.
The manufacturer can specify either the % of maximum torque or the actual torque
value in the motor program.
These values are of no consequence to the field technician other than to
understand what its capabilities are. The manufacturer will simply provide a table or
diagram showing which tap is to be used for heating, cooling and continuous fan
selections depending on the equipment it is used in, i.e. a furnace, air handler or
package system.
The information most important to the field technician is understanding how the X13
motor operates compared to a PSC motor or the Premium ECM 2.3 motor for proper
set-up and troubleshooting.
Communication to the X13 motor is the
low voltage 24vac that is provided to
taps 1-5. It is important to understand
this voltage is used to communicate to
the motor only, not to operate it. In
simple terms, the 24vac provided to
each tap is only a communication
signal used to select up to five different
torque values. The motor’s control
board uses this signal to determine
which torque value it should deliver,
and then uses the line voltage (high
voltage that is continuously connected)
to operate the motor, according to that
program.
The X13 can also accept 9-23vdc
as a communication signal.
However currently all manufacturers
are using 24vac.