UNT-SVX07E-EN
83
ECM Overview and Setup
Overview
This section addresses integrating the new Trane
electronically commutated motor (ECM) and VelociTach™
motor control board. This exciting new series delivers
outstanding comfort, safety, and performance with greatly
reduced energy consumption compared to traditional
units with induction AC motors.
The new series of units will provide a long service life with
proper installation and operation. The new system
provides a high degree of flexibility and configurability,
but the simplicity of customized factory configuration
appropriate to most installations.
Very little intervention is needed by service and
installation personnel in most applications; however,
installers must read through the entire document before
beginning installation of the new equipment.
This literature focuses on unit motors and controls,
including three new circuit modules developed
specifically for this series.
There are four primary components that enable the
technology on your product:
•
Trane ECM
•
VelociTach motor control board
•
Manual fan speed switch (FSS)
•
CSTI adapter board
The motors and modules are combined as systems, and
cannot work without each other.
Electronically Commutated Motor
(ECM)
•
The ECM has integrated electronics, overload
protection and short circuit protection. The motor
contains no user-serviceable components inside.
•
The motor mates to the unit electrically via a single
plug that contains both the operating voltage and the
control signals that are needed for correct operation.
Figure 71.
UniTrane fan-coil with Trane ECM motor
Circuit modules
ECM motor
Figure 72.
Trane ECM motor
NOTICE:
Equipment Damage!
The motor harness attached to the single plug to which
the motor mates contains the very important motor
voltage jumper and should not be modified or
substituted. Failure to follow this instruction could
result in equipment damage.
