Fans; Inspecting And Cleaning Fans; Bearing Set Screw Alignment; Torque Requirements - Trane Climate Changer TCFS Nstallation, Operation, And Maintenance

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 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 "Troubleshooting, " p. 81
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.

Bearing Set Screw Alignment

Align bearing set screws for belt-drive fans. See
p. 56 for set screw torque measurements.
CLCH-SVX010A-EN
Figure 94. Alignment

Torque Requirements

Refer to Table 8
and bearings bolts. Refer to
setscrew torque.
for
Table 8.
Size (inches)
1/4-20
1/4-28
65/16-18
5/16-24
3/8-16
3/8-24
7/16-14
7/16-20
1/2-13
1/2-20
9/16-12
9/16-18
5/8-11
5/8-18
3/4-10
3/4-16
7/8-9
7/8-14
1-8
1-14
Note: Soft metric conversions are not acceptable for screw and hex sizes.

Fan Bearing Lubrication

Table 2,
Bearing Failure!
Do not mix greases with different bases within the
bearing. Mixing grease within the bearing could result
in premature bearing failure.
For belt-drive fans, the grease used in electric motor
bearings is usually not compatible with the grease used in
fan bearings. Never mix the two grease types! See
for compatible greases and
capacity.
Routine Maintenance
for minimum torque of motor mounting
Table 2, p. 56
Minimum hex head bolt torque in lb.-ft.
(Grade 5 bolts)
Thread Designation
UNC
UNF
UNC
UNF
UNC
UNF
UNC
UNF
UNC
UNF
UNC
UNF
UNC
UNF
UNC
UNF
UNC
UNF
UNC
UNF
NOTICE:
Table 10
for minimum
Minimum Torque
6
7
14
16
24
28
42
45
69
83
99
118
150
176
254
301
358
422
500
602
Table 9
for maximum grease
77