Installation And Initial Setup - Trane UniTrane Installation, Operation And Maintenance Manual

Installation and Initial Setup

WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives or
other energy storing components provided by Trane or
others, refer to the appropriate manufacturer's literature
for allowable waiting periods for discharge of
capacitors. Verify with an appropriate voltmeter that all
capacitors have discharged.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on the
tags, stickers, and labels could result in death or serious
injury. Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical hazards,
MUST follow precautions in this manual and on the tags,
stickers, and labels, as well as the following instructions:
Unless specified otherwise, disconnect all electrical
power including remote disconnect and discharge all
energy storing devices such as capacitors before
servicing. Follow proper lockout/tagout procedures to
ensure the power can not be inadvertently energized.
When necessary to work with live electrical components,
have a qualified licensed electrician or other individual
who has been trained in handling live electrical
components perform these tasks.
Safety Requirements
Follow all recommendations below. Failure to do so could
result in death or serious injury.
• The ECM motors contain capacitors which store
residual energy. Please keep clear of the fan wheels for
5 minutes after the power has been removed from the
system, as a power request with the motor powered
off, could result in a very short period of actuation.
• All settings take effect immediately, including fan
startup and enabling of electric heat. Caution should be
taken to stay clear of hazardous voltages, moving parts
and electric heat elements while making adjustments
to the VelociTach motor control board. If it is not
practical to stay clear of these areas during adjustment
of the motor control board, please contact Trane
Global Parts for configuration kit that allows easy
powering of the motor control board outside of the unit
with a 9V battery.
UNT-SVX07J-EN
• Changes to switch settings on the CSTI adapter board
take effect immediately. Changes should be made to
the CSTI configuration switches with the power off.
• Initial hookups to the CSTI and Standard Adapter
board, including low voltage interconnections, must
be made with the power off.
• Do not make connections to the motors or the adapter
boards while power is ON. Do not remove connections
to the motor or the adapter boards while the power is
ON.
• Do not free spin the fan wheels with your hands while
the unit is powered on. The system is constantly
scanning and responding to the operational status of
the motors.
Setup
Note: Normally, Trane ECMs are configured for soft
ramps and transitions between speeds. However,
to aid in commissioning of the unit, for
approximately 10–15 minutes, the ramps will be
shortened to quickly observe proper unit behavior
and response to speeds.
For new installations, all boards and motors are pre-
installed and pre-configured according to the unit
configuration, indicated by its model number.
Under normal and intended operation, the only required
intervention specific to the new ECM units is the wiring of:
• Wall-mounted low-voltage fan speed switch inputs to
the adapter boards' terminal strips and 24 Vac tap to
field-installed fan speed switch.
• Field-supplied controllers/thermostats to the adapter
boards' terminal strips and 24 Vac power tap to
field-supplied controller/thermostat.
• Adjustment and calibration of the variable speed
inputs (VSP/0–10V) on the system.
• Adjustment, calibration or disabling of the optional
auto-changeover function on CSTI units.
Otherwise, proceed with the mechanical, electrical and
controls installations as defined in other sections of this
manual, following all warnings and cautions.
After installation, turn power on.
Note: Specifications subject to change without notice.
Consult the unit submittals and unit schematics
before determining hookup requirements.
Terminal block positions, polarities and
assignments are determined for specific unit
configurations only. Signal assignments are
indicated, for reference only.
Both adapter boards come equipped with integrated
terminal blocks to hook up to the field supplied/mounted
fan speed switches and external controls. Connections
should be made to the screw terminals with wires between
16 AWG and 24 AWG, with a ~4–5-mm wire strip length.
The terminal blocks have 5-mm spacing, and are equipped
ECM Overview and Setup
67