Adjustments - Trane VUV Installation, Operation And Maintenance Manual

ECM Overview and Setup

Adjustments

After connections of power and hookup of customer installed
controls/fan speed control and under normal operative
conditions, the only adjustments needed to be made to the
motor control 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-
changeover function on CSTI units, where applicable.
In addition, the CSTI adapter board offers configurability that
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 inversion relays for
use with normally open valves
• Changeover function for use with changeover coils (in
conjunction with the motor control 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.
Adjusting Variable Speed Inputs
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. Verify with a CAT III or IV
voltmeter rated per NFPA 70E that all capacitors have
discharged.
WARNING
Safety Alert!
You MUST follow all Instructions below. Failure to do so
could result in death or serious injury. All settings take
effect immediately, including fan start-up 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 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.
62
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 motor control board 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 Instructions 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.
Note: Configuration adjustments to the motor control 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.
• The 0–10V (variable speed) inputs are available for use,
but are not mandatory. The ECM system comes standard
with three to five field-accessible thermostatic inputs (with
adjustable speed), so the use of the 0–10V inputs is
optional.
• All inputs are independently configurable and
simultaneously accessible, and the motor control board
will choose the highest user (configured and requested)
speed. However, care should be taken with customer
controls to avoid contention of signals.
The motor control board and adapter boards offer standard,
normalizing 0–10V Variable speed fan inputs for use with field
supplied controllers or thermostats. These inputs can be used
as the only input to the system, used in addition to the
thermostatic (H, M, L) inputs, or not used at all. The inputs are
accessible via 1TB4 on the adapter boards.
The motor control board is factory configured to drive the unit
to a minimum speed (catalogue "low speed" value), defined as
AlM1 AlM2
and once the analog (0–10V) input is honored.
As a default, the noise floor/threshold is set to 3 percent (0.3V).
At 0.3V, the system will drive the motors to the speeds defined
AlM1 AlM2
in defined as and
10V, the motor control board will drive the motor to maximum
speed (normally catalogue "high speed" value), defined as
AhM1 ahm2
and , and will change speed in response.
. If the analogue input goes to
UV-SVX005G-EN