GE ECM
Description
The family of ECM 2.3 motors is a continuation of the
2.0 product with improvements in moisture resistance and
line transient suppression. The product serves the indoor
blower market for almost all residential HVAC systems and
many commercial air distribution systems. Their wide speed
range, high efficiency and programmability give them a
virtually unlimited range of performance characteristics,
which results in a highly reliable, field-proven, convenient
package. The ECM 2.3 allows you to imagine and implement
possibilities that no conventional induction motor, or
competing variable-speed technology could provide. The
product is offered in a wide range of specifications.
Features and Benefits
Ultra-high efficiency
• ECM 2.3 efficiencies are as high as 82%. At full load, the
ECM 2.3 is 20% more efficient than a standard induction
motor. At low speed, the ECM is over 30% more efficient than
a standard induction motor. On constant fan speed, the ECM
consumes 60-80 Watts as compared to 400 watts for the
induction motor. What's more, its permanent magnet, DC
design allows it to maintain its efficiency over its wide
speed range.
New moisture resistant design
• ECM 2.3 addresses the most common problem today in
forced-air systems – moisture. GE Commercial Motors by
Regal-Beloit is now encapsulating the motor's sensitive
control to prevent water from reaching its electronic
components. In fact, the ECM stands up to more than 600
hours of ASTM-B117 salt-spray testing.
Programmability
Just one motor can optimize your system performance and
minimize your inventory. Programming options for the ECM 2.3
include rotation direction, start/stop ramp rates, on/off
blower delays and many other functions – all stored in the
motor's memory. Even its speed and torque characteristics
can be customized to meet specific performance requirements.
As a result, programmability means lower inventory because
one motor can serve many applications.
Easy installation and service
The ECM 2.3 is designed to be easy to install, troubleshoot
and service. There is no need to go to the motor for setup.
In fact, there are no dip switches or adjustment terminals
on the ECM 2.3. The system manufacturer can locate all
connections required for setup in any convenient location.
When it comes to service, the 2.3 is designed so its
electronic controller can be replaced without removing the
motor from the blower mounting, which greatly reduces
service time and cost.
Self regulating constant airflow
Unlike a conventional blower motor, which is designed to
operate at one speed, the ECM variable-speed motor can run
in a wide range of speeds. That's important because blowers
need to adjust speed to deliver the airflow needed by the
system. GE Commercial Motors by Regal-Beloit's patented
constant airflow technology can be programmed to deliver
constant airflow into a wide range of external static
pressures in an air distribution system. This is all
accomplished without the use of external sensors. Some
benefits of constant airflow: improved air distribution
throughout the static pressure range, improved indoor air
quality with the use of high efficiency air filters and low
speed constant fan operation which not only saves money but
lessens the temperature stratification that can be common in
multilevel homes.
Low audible noise
The most frequent praise given ECM powered systems by
customers is how quiet they are. The 3-phase motor
construction results in very low torque ripple. GE
Commercial Motors by Regal-Beloit's patented resilient rotor
construction effectively eliminates noise transmitted
through the shaft. The ECM's ability to be programmed to
slowly ramp up to speed eliminates the abrupt change in
sound found when an induction motor HVAC system cycles on
and off. Ultimate comfort systems are typically designed to
take advantage of the ECM low speed efficiency at first
stage operation and continuous fan speeds, further reducing
audible noise.
Variable speed or thermostat mode operation
In variable speed (VSpd) mode a user supplier external
control circuit determines the operating point of the unit.
Control information is sent via a pulse width modulation (PWM)
signal. Within the operating limits of the unit, the PWM
signal has complete control of the speed, torque or airflow
produced. In the thermostat (Tstat) mode, the operating
point of the unit is determined by the internal
microprocessor control circuit in direct response to the
status of the various control input lines. In this mode, the
ECM 2.3 requires no external electronic circuitry or PWM
signal. The unit responds directly to the thermostat signals
and other control lines in a user pre-determined manner.
Applications
• Single-stage, two-stage, and variable-capacity furnaces
• Air Handlers
• Energy-recovery ventilators
• Powered filter units
• Unit ventilators
• Geothermal heat-pump systems
• Commercial fan-powered terminal units |
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