Factory-Mounted Controls; Wiring - Trane UCCA Installation, Operation And Maintenance Manual

General Information

Factory-Mounted Controls

Performance air handlers are available with an optional
control interface. This package can be used as part of a
stand-alone operation, or it can be fully integrated into a
comprehensive control system. The Trane Earthwise™
system incorporates the benefits of factory-installed
controls and links the air handler to the Tracer™ SC system
controls building management system. This option is
designed to lower installation costs and risk while
dramatically improving the quality of the application and
the performance of the air handler. The entire air handler
control system is engineered, mounted, wired, and tested
before leaving the factory. As a result of strict quality
manufacturing methods, these control options bring
consistency and reliability to the control-system package
and provide single-source responsibility.
The following control devices are available as standard
mounted on fan sections:
• Variable-frequency drives (VFDs)
• Control interface package
– Fan motor disconnect switch
– Fused transformer(s)
– Fan contactor
– Customer terminal strip for field-provided controls
• Various end device options, including:
– Low limit protection
– Condensate overflow switch
– Fan status switch
– Filter status switch
– Discharge air sensor
– Mixed air sensor
– Damper actuator
8

Wiring

WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.
Entrances are generally provided for field-installation of
high and low voltage wiring through a pipe/nipple
connection in the unit depending on unit configuration
with or without factory-mounted controls. Before
installation, consider overall unit serviceability and
accessibility before mounting, running wires (power),
making penetrations, or mounting any components to the
cabinet.
Wiring to the air handler must be provided by the installer
and must comply with all national and local codes. The fan
motor nameplate includes a wiring diagram. If there are
any questions concerning the wiring of the motor, write
down the information on the motor nameplate and contact
your local Trane sales office.
CLCH-SVX009A-EN