Installation and Maintenance Manual

ECM Overview and Setup
UNT-SVX07D-EN 63
Initial Setup and Configuration
After connections of power and hookup of customer
installed controls/fan speed switches and under normal/
operative conditions the only adjustments needed to be
made to the ECM engine board during commissioning of
the unit are:
• Adjustment and calibration of the variable speed
inputs (VSP/0–10V) on the system, where applicable.
• Adjustment, calibration or disabling of the optional
auto-c
hangeover function on CSTI units, where
applicable.
In addition, the CSTI adapter board offers configurability
th
at can be used in special cases to adjust the following
operation of the unit:
• Courtesy cooling/main valve logic inversion relays for
use
with normally open valves
• Courtesy heating/auxiliary valve logic in
version relays
for use with normally open valves
• Changeover function for use with changeover coils (in
co
njunction with the ECM engine board)
The switches are factory-set based on the model number
configuration as ordered; however, the information is
provided below to aid in the understanding of the
operation of the system.
Configuration
Configuring the ECM Engine Controller
Adjustment and Calibration of the Variable
Speed Inputs (VSP/0–10V)
Notes:
• The 0–10V (variable speed) inputs are available for use,
but are not mandatory. The Trane Brushless DC system
WARNING
Hazardous Voltage w/Capacitors!
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. Failure to disconnect
power and discharge capacitors before servicing could
result in death or serious injury.
WARNING
Safety Alert!
You MUST follow all recommendations below. Failure
to do so could result in death or serious injury.
• The adapter boards contain high voltage.
Connections to the adapter boards/changes to the
CSTI configuration switches should be made only
with the power to the unit disconnected.
• The adapter boards contain high voltage.
Configuration adjustments to the ECM engine board
should be made through the SMALLER of the two
low-voltage lids on the front of the control panel,
through the low-voltage insulation/shielding.
• 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 ECM engine board. If it is not
practical to stay clear of these areas during
adjustment of the ECM engine board, please contact
Trane Global Parts for configuration kit that allows
easy powering of the engine board outside of the unit
with a 9V battery.
CAUTION
Burn Hazard!
On electric heat units, certain parameter values are
locked out to prevent overheating of the unit. These
functions will appear to be saved; however, they will
not be accepted if the Electric Heat Protection setting is
“On”. Do not change the Electric Heat Protection setting
to “Off” and make changes to the protected settings
unless you are programming an unconfigured service
replacement board to match the unit settings on a ECM
configuration label. Failure to follow this instruction
could result in the unit overheating and becoming hot
to the touch, which could result in minor or moderate
injury, and/or equipment damage.
NOTICE:
Equipment Damage!
You MUST follow all recommendations below. Failure
to do so could result in equipment damage.
• Care should be taken in the system to use a single
24 Vac supply system to avoid damage to equipment.
• Care should be taken to observe proper polarity and
grounding in the hookup of the 0–10V system to
avoid damage to equipment.
UNT-SVX07_-EN.book Page 63 Friday, April 27, 2012 9:40 AM