Duct Connections - Trane UniTrane Installation, Operation And Maintenance Manual

Installation—Mechanical

Duct Connections

Install all air ducts according to National Fire Protection
Association standards for the Installation of Air
Conditioning and Ventilating Systems (NFPA 90A and
90B).
Install all air ducts according to the National Fire Protection
Association standards for the "Installation of Air
Conditioning and Ventilation Systems other than
Residence Type (NFPA 90A) and Residence Type Warm Air
Heating and Air Conditioning Systems (NFPA 90B).
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 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.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
52
The unit's airflow configuration varies dependent on the
model and options ordered. A one-inch duct collar is
provided on units with a ducted return and/or discharge to
attach ductwork to the unit.
Trane recommends using galvanized sheet metal
ductwork with fan-coil and cabinet heater units. Slide the
sheet metal duct over the duct collar flange of the unit, seal
the joint and fasten with sheet metal screws.
Note: Do not run screws through the removable front
panel on concealed units.
Ductwork Recommendations
Follow the general recommendations listed below when
installing ductwork for the unit.
• Discharge ductwork should run in a straight line,
unchanged in size or direction, for a minimum
equivalent distance of three fan diameters from the
unit (approximately 20 inches).
• When making duct turns and transitions avoid sharp
turns and use proportional splits, turning vanes, and
air scoops when necessary.
• When possible, construct, and orient supply ductwork
turns in the same direction as the fan rotation.
UNT-SVX07J-EN