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Installation
10. Expansion Module (Optional)
Figure 24. Electric Box
Optional Equipment
Additional control conductors may be required depending
on the options purchased with the equipment. Refer to the
supplied electrical schematic to determine the total
number of interconnecting conductors required for your
system. It is important to note that the control
transformer(s) supplied with the equipment have been
sized and selected based upon the expected loads for the
system.
CAUTION
Do not connect any additional loads to the system
control transformers. Connecting additional loads to
the factory supplied control transformers may result in
overloading of the transformer.
Note: All control wiring must be provided in accordance
with local and national electrical code
requirements for class 2 circuits.
Note: Do not route control conductors together with
power conductors.
Remote Temperature/Humidity Sensor
Field installed remote temperature/humidity sensors
require a three conductor shielded cable, with the shield
terminated at the unit electric box. Both the electric box
and the sensor are provided with a terminal strip for the
28
wire connections. Refer to the electrical schematic
supplied with your unit for proper wire terminations.
Remote Water Detector
Each remote water detector requires two conductors to be
wired to the control terminal board within the unit
electrical box (see
Figure
wire insulation must be rated at 600V. Refer to the
electrical schematic supplied with your unit for proper
wire terminations.
Remote Shut Down
The unit is provided with a means to remotely shut down
the air conditioning unit. A normally closed switch rated at
5 amperes at 24Vac is required for this purpose. Two
conductors from the normally closed switch must be
connected to the control terminal board located in the
electric box. Refer to the supplied electrical drawing for the
appropriate wire terminations.
Interconnecting Remote Equipment
Water Cooled Systems (TR-CFD/TR-CFU-_ _ _-
D2W Models)
Systems equipped with an internal water-cooled
condenser do not require field wiring to external
components other than to optional sensors as selected
(e.g. Flow Sensors, Remote Supply Air T/H sensor, Air
Pressure, Customer Alarm Inputs).
Glycol Cooled Systems (TR-CFD/TR-CFU-_ _ _-
D2G Models)
For systems equipped with a glycol-cooled system/ pump
package, the installer must provide main power wiring to
the main power distribution block located in the pump
package and the drycooler control boxes. The drycooler
and pump package may each be connected directly to
main power (separate connections), or the drycooler may
be interconnected to main power in the pump package
control box as shown in
Figure 25
connection). A separate equipment ground lug is provided
within each box for termination of the earth ground wire.
The installer must also wire two control conductors from
the control terminal board within the A/C unit to the pump
package electrical box. Refer to the supplied electrical
drawing for proper wire terminations.
Air Cooled Split Systems with Remote
Condenser (TR-CFD/TR-CFU-_ _ _-D2A
Models)
See
Figure 26, p.
29. For systems equipped with a remote
condenser, the installer must provide main power wiring
to the main power distribution block located within the
remote condenser control box. A separate equipment
ground lug is provided within the electrical box for
termination of the earth ground wire. Refer to the electrical
drawing supplied with your unit and the wiring diagram
24). If customer furnished, the
(single-point
SS-SVX002B-EN
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