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Electrical Power Quality
This unit requires clean electrical power to operate properly. Voltage and frequency should be within
10% of the designed voltage for the unit. Failure to provide this power may damage the unit.
The EC fan motors contain built-in protection circuits that will shut down the fan if there is
a power quality issue. If the fans go into protection mode, the unit must be shut down and
restarted to return to normal operation.
Power Connections
TrilliumSeries™ Adiabatic Products require a 3 phase 60Hz power source (50Hz also
available). The voltages available are 200V, 230V, and 460V (380V and 415V also available).
Please ensure that the correct voltage is supplied to the unit. If unsure, check your unit’s
submittal to verify that the provided power matches your unit. The TSDC includes a power
wire port on the upper left-hand side. The TSDC2 and TSDF2 includes a power wire port on
the bottom right-hand side. In both instances, remove the NEMA plug. Make sure to use the
proper sealing methods to comply with NEMA standards. This will maintain the panel’s NEMA
4 rating and prevent water ingression to the unit.
Controls Connections
The controls wiring should be provided in a separate conduit from any power wiring. BAC
recommends penetrating the control panel from the bottom or side panel observing standards.
It is also recommended to use of shielded wire to avoid interference.
BAC offers the following options to control the TrilliumSeries™ Adiabatic Product. Check the
submittal package to determine how the unit was setup and shipped:
• Control signal (0-10VDC, 10-0VDC or 4-20mA): The 0-10VDC signal commands the fans
off at 0V and full speed at 10V. The 10-0VDC signal commands the fans off at 10V and
full speed at 0V. The voltage signals should be wired to terminals – V (negative) and 10V
(positive). The 4-20mA signal commands the fans off at 4mA and full speed at 20mA.
The 4-20mA should be wired to terminals 10V (negative) and mA (positive).
• Communications via ModBus or BACnet: BAC offers both protocols over RS485 and
BACnet over IP. For RS485 connection, BAC recommends the use of twisted shielded
twisted paired wire with a ground. The communications card will be located on the
bottom of the controller. The BAC modbus and BACnet connections do not have any
device restrictions or proprietary protocols. However, you should contact your building
management system provider or controls integrator to verify your system will work with
the TrilliumSeries™ Adiabatic Product communications protocols. Please see Table 5 on
page 16 for specific communication points map.
• Head Pressure Control: For units with this option, BAC has already preset the controller
to operate with the specified refrigerant at the factory. A pressure sensor will be furnished
with the unit. This sensor must be installed in the piping either on the supply side or
discharge side of the coil using a Schrader 7/16” 20 UNF valve (provided by others).
The sensor must be wired to terminals 48 (positive) and 49 (negative). To program the
temperature set point into the controller, scroll down on the screen until the refrigerant
temp set point is shown, press enter and using the up/down arrows select the desired
temperature and press enter. Please note, there is only a single temperature set point
in the TrilliumSeries™ Adiabatic Condenser controller. If you desire to control the unit
based on pressure, the pressure value will need to be converted to temperature for that
specific refrigerant.
• Leaving Fluid Temperature Control: For fluid cooler units, the leaving fluid temperature is
monitored with a sensor installed in the leaving water piping. The sensor must be wired to
terminals as shown in wiring diagrams included with submittal package.
NOTICE: When connecting power
to the unit, do not penetrate the
top of the control panel. Doing so
may allow moisture to enter the
panel. All cable and conduit should
be supported separately from the
unit. Do not penetrate the unit for
supports or other connections.
NOTE: EcoFlex™ Controls come
with preset date and time from
the factory and do not need
modification during initial start-up.
NOTE: Units purchased after
November 2015 are fully integrated
with Emerson CPC Controller.
NOTE: The minimum fan speed is
5%. Any signal sent below 5% (i.e.
9.95V or 0.05V) will be ignored and
the fans will turn off.
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