CLCH-SVX03C-EN
85
Routine Maintenance
Fans
WARNING
Rotating Components!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/ tagout procedures to ensure the equipment can not be inadvertently energized. Secure
drive sheaves to ensure rotor cannot freewheel. Failure to secure drive sheaves or disconnect
power before servicing could result in death or serious injury.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/ tagout procedures to ensure the equipment can not be inadvertently energized. Failure
to disconnect power before servicing could result in death or serious injury.
Inspecting and Cleaning Fans
Fan sections of air handlers 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
“Troubleshooting” section on page 94
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.
Figure 73. Bearing set screw alignment
Bearing Set Screw Alignment
Align bearing set screws as illustrated in
Figure 73
.
Table 16 on page 77
provides bearing set screw
torque measurements.
Align set screws
Align set screws
