Unit installation

Maintenance
SCXF-SVX01K-EN 81
specifically designed for HVAC use. Carefully follow
the sanitizer manufacturer’s instructions regarding
product use.
6. Immediately rinse the drain pan thoroughly with fresh
w
ater to prevent potential corrosion from the cleaning
solution.
7. Allow the unit to dry thoroughly before putting the
system
back into service.
8. Properly dispose of all contaminated materials and
cleaning
solution.
Inspecting and Cleaning the Fan
Inspect the fan section every six months or more
frequently if operating experience dictates. Clean
accumulated dirt and organic matter on the fan interior
surfaces following the procedure below:
1. Disconnect all electrical power to the unit.
2. Wear the appropriate personal protective equipment
(PPE).
3. Use a portable vacuum with HEPA filtration to remove
the
loose dirt and organic matter.The filter should be
99.97% efficient at 0.3 micron particle size.
4. Thoroughly clean the fan and associated components
with
an industrial cleaning solution. Carefully follow
the cleaning solution manufacturer’s instructions
regarding personal protection and ventilation when
using their product.
5. Rinse the affected surfaces thoroughly with fresh
w
ater 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. Properly dispose of all contaminated materials and
cleaning
solution.
Supply Fan
Important: On units ordered with a Design Special of
Inlet Guide Vanes, refer to non-current IOM
(SCXF-SVX01D-EN) dated on or before
March 2008 for maintenance procedure.
Fan Drive
Perform the following procedures according to the
“Periodic Maintenance Check List”.
1. Rotate the fan wheel to ensure it turns freely in the
proper direction and is not rubbing on the fan housing
or inlet. If necessary, center the fan wheel again.
2. Check the position of both shafts. Fan and motor shafts
should
operate parallel to each other for maximum belt
and bearing life. Shim as necessary under the motor or
fan bearings to obtain proper alignment.
3. Check the fan motor sheave alignment with straight
edge
or a tightly pulled string. For sheaves of different
widths, place a string in the center groove of each
sheave and pull it tight for a center line. See Figure 46,
p. 83 for recommended torques.
4. Once the sheaves are properly aligned, tighten sheave
set
screws to proper torque.
5. Check belt tension. Refer to the “Measuring Belt
T
ension” section.
6. If required, adjust belt to the minimum recommended
tension.
Refer to “Adjusting BeltTension” section.
7. Retighten bearing set screws to the proper torques
af
ter aligning the sheaves. See Table 47, p. 82 for
proper torques.
8. Check the fan bearing locking collars for tightness on
the
shaft.To tighten the locking collar, loosen the set
screw and slide the collar into its proper position over
the extended end of the inner case.Tighten the set
screw to the torque value in Table 47, p. 82.
9. During air balancing, verify the sheave alignment, belt
tension,
and that the shaft is parallel.
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.
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.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN