Installation - Electrical - Trane Climate Changer TCFS Nstallation, Operation, And Maintenance

Installation - Electrical

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 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.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
NOTICE:
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as unit terminals are not designed
to accept other types of conductors.
If the unit does not include a factory-mounted starter,
wiring to the unit fan motor must be provided by the
installer and must comply with all national and local
electrical codes. The installer must also furnish a service
disconnect switch in compliance with national and local
electrical codes.
Fan motors require motor overload protective devices that
are rated or selected in compliance with the National
Electric Code (NEC) or Canadian Electric Code. Specific
unit and motor connection diagrams are provided on the
starter/VFD if Trane-provided, or refer to the motor
nameplate.
If wiring directly to the motor, a flexible connection at the
motor to permit fan belt adjustment should be provided.
Fractional horsepower motors may be factory connected
to a terminal box on the unit. If this construction is
provided, the installer should complete field wiring to this
connection box. For a typical high voltage wiring
schematic, see unit submittal.
All conduit penetrations need to be sealed between the
conduit and unit casing with caulk. Between the
conductors in the conduit, seal with dust seal, such as
Appleton DUC-1, Duct Seal.
On electrical drawings, solid lines indicate factory-
installation provided. Dotted lines indicate field-
installation.
52
NOTICE:
Leakage!
Failure to seal penetrations from inner panel to outer
panel could result in unconditioned air entering the
module and water infiltrating the insulation, resulting
in equipment damage.
All units with starters or variable-frequency drives (VFDs)
that have direct-digital controllers (DDCs) are provided
with line voltage to 120 Vac power transformers with
power 120 Vac to 24 Vac control transformers.
shows a typical VFD power box.
Figure 60. Variable-frequency drive (VFD)
A motor driven by a VFD may operate over 60HZ. Please
refer to Job Submittal.
To provide field-wiring to units with DDC or low limit
controls:
• If VFD or starter is not factory-mounted, provide
120 Vac power to a transformer in the valve jack when
a separate circuit is recommended.
• Install outside-air sensor and space sensor, if ordered.
Figure 60
CLCH-SVX010A-EN