UNT-SVX07B-EN 59
Installation—Electrical
Unit Wiring Diagrams
Specific unit wiring diagrams, based on unit options ordered, are provided inside each unit and can
be easily removed for reference. Use these diagrams for connections or trouble analysis. Wiring
diagrams are attached on the inside of the front panel of vertical cabinet and recessed models and
on the fan and motor panel of vertical concealed and all horizontal models.
Supply Power Wiring
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.
Refer to the unit nameplate to obtain the minimum circuit ampacity (MCA) and maximum fuse size
(MFS) or maximum circuit breaker (MCB) to properly size field supply wiring and fuses or circuit
breakers.
Refer to the unit operating voltage listed on the unit wiring schematic, submittal, or nameplate.
Reference the wiring schematic for specific wiring connections.
NOTICE
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of conductors. Failure to use copper
conductors may result in equipment damage.
Note: All field wiring should conform to NEC and all applicable state and local code requirements.
The control panel box is always on the end opposite the piping connections. Access the
control box by removing the two screws that secure the front cover. This will allow the panel
to be removed, to provide access to the electrical components.
WARNING
Hazardous Electrical Shorts!
Insulate all power wire from sheet metal ground. Failure to do so may cause electrical shorts
that could result in death or serious injury.
If the unit does not have a disconnect switch, the power leads and capped ground wire are inside
the control panel.
If the unit has a disconnect switch, the power leads are wired to the junction box switch on the
control panel. Pull the capped ground wire into the junction box.
Electrical Grounding Restrictions
All sensor and input circuits are normally at or near ground (common) potential. When wiring
sensors and other input devices to the Tracer controller, avoid creating ground loops with
grounded conductors external to the unit control circuit. Ground loops can affect the measurement
accuracy of the controller.
To Next Page
Loading...
Need help?
General