Fans - Trane UniTrane Installation, Operation And Maintenance Manual

Fans

WARNING
Rotating Components!
The following procedure involves working with rotating
components. Disconnect all electric power, including
remote disconnects before servicing. Follow proper
lockout/ tagout procedures to ensure the power can
not be inadvertently energized. Secure rotor to ensure
rotor cannot freewheel. Failure to secure rotor or
disconnect power before servicing could result in
rotating components cutting and slashing technician
which could result in death or serious injury.
Inspecting and Cleaning Fans
Fan sections should be inspected every six months at a
minimum or more frequently if operating experience
dictates. If evidence of microbial growth (mold) is found,
identify and remedy the cause immediately. Refer to the
Diagnostics and Troubleshooting chapter for possible
causes and solutions. To clean the fan section:
1. Disconnect all electrical power to the unit.
2. Wearing the appropriate personal protective
equipment, remove any contamination.
3. Vacuum the section with a vacuum device that uses
high-efficiency particulate arrestance (HEPA) filters
with a minimum efficiency of 99.97 percent at
0.3 micron particle size.
4. Thoroughly clean any contaminated area(s) with a
mild bleach and water solution or an EPA-approved
sanitizer specifically designed for HVAC use.
5. Immediately rinse the affected surfaces thoroughly
with fresh water and a fresh sponge to prevent
potential corrosion of metal surfaces.
6. Allow the unit to dry completely before putting it back
into service.
7. Be careful any contaminated material does not contact
other areas of the unit or building. Properly dispose of
all contaminated materials and cleaning solution.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
UNT-SVX07J-EN
Fan Motors
Inspect fan motors periodically for excessive vibration or
temperature. Operating conditions will vary the frequency
of inspection.
Torque Rating
Check and adjust fan wheel set screws whenever a
component is removed or an adjustment is made. Refer to
the table below for recommendations.
Table 61. Recommended torques
Torque (in·lb)
Fan wheel screw 120-130
Fan Board Assembly
Follow the procedure below when replacing the coil or
making repairs to the fan or motor.
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
Vertical Units
1. Remove the front panel of cabinet and recessed units.
2. Pull the main and overflow drain hoses of the main
drain pan into the inside of the fan-coil chassis end
panel.
3. Remove the two fan board mounting screws.
4. Slide the fan board out horizontally to remove.
Horizontal Units
1. Open the bottom panel of cabinet and recessed
models.
2. Remove the main drain pan following the instructions
given under the drain pan section above for horizontal
fan-coil units.
3. While supporting the fan board in place, remove the
two fan board mounting screws which secure the fan
board to the unit.
Routine Maintenance
Ft·lb N·m
10.0-10.8 13.6-14.7
127