Fans; Inspecting And Cleaning Fans; Fan Motors; Torque Rating - Trane BCHE Installation, Operation And Maintenance Manual

Fans

WARNING
Rotating Components!
Failure to disconnect power before servicing could
result in rotating components cutting and slashing
technician which could result in death or serious
injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized.

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 "Diagnostics and Troubleshooting," p. 123
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.
Table 40. BCHE/BCVE fan, filter, and mixing box general data
Unit Size 12
Nominal CFM 400
Airflow
Minimum cfm 250
Maximum cfm 500
Fan Data
Fan wheel, in.
9 x 4
(dia X width)
RPM range
800-2500
Motor hp
0.5-1.0
Unit Flat Filter (BCHE)
(Qty) Size (1) 12 x 20
Area, sqft
1.67
Velocity, ft/min
240
Unit Flat Filter (BCVE)
BCX-SVX002A-EN
for possible
18 24 36
600 800 1200
375 500 750
675 1000 1600
9 x 4 9 x 4 9 x 6
800-2500 800-2500 800-2500
0.5-1.0 0.5-1.0 0.5-2.3
(1) 12 x 12
(1) 12 x 24 (1) 12 x 24
(1) 12 x 24
2.00 2.00 3.00
300 400 400
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!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.

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
for recommendations.
Table 39. Recommended torques
Torque (in·lb)
Fan wheel
screw
120-130
48 54 60
1600 1800 2000
1000 1125 1250
2000 2400 2500
12 x 8 9 x 9 12 x 8
600-1700 800-2500 600-1700
0.5-3.5 1.0-3.5 1.0-3.5
(1) 16 x 16
- -
(1) 16 x 25
- 4.56 -
- 395 -
Routine Maintenance
Ft·lb N·m
10.0-10.8 13.6-14.7
72 90 120
2400 3000 4000
1500 1875 2500
3000 4000 5000
9 x 9 12 x 9 12 x 12
800-2500 600-1800 600-1800
1.0-3.5 1.0-5.0 1.5-5.0
(1) 20 x 24
(2) 16 x 25 (3) 18 x 24
(1) 24 x 24
5.56 7.33 9.00
432 409 444
115