Coil Cleaning - Trane VUV Installation, Operation And Maintenance Manual

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.
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
following table for recommendations.
Table 36. Recommended torques
Torque (in·lb)
Fan wheel screw 120-130
Figure 84. Routing motor and crossover harnesses
Coil blockoff top back panel
Leave front set of holes open
one each end of block-off panel
(no screw installed here)
• Wiring to the motor transitions from the control panel onto
a trough onto the fan board.
• The motor harnesses are routed through holes below the
fan board and into the motors with a latching multi-plug.
• The crossover harnesses, which are used to make
connections to the piping side of the unit, are routed
entirely through the trough on the fan board to the piping.
• Fan board attachment screws are located on the front left
and right edges of fan boards, and may be concealed by
gasketing.
UV-SVX005G-EN
Ft·lb N·m
10.0-10.8 13.6-14.7
10-16 x 0.50 sheet
metal black screw
Figure 85. Motor attachment screws are behind 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 a CAT III or IV voltmeter rated per
NFPA 70E that all capacitors have discharged.
1. Remove front panels of unit.
2. Remove drain pan and drain pan support.
3. Free the motor and crossover harnesses from the fan
board, either by unplugging from the motors and valves
and threading backwards, or by unplugging the motor plug
from the adapter boards.
4. Remove at least one fan housing and loosen fan Allen
screw on first fan. Loosen the wheel of the other (if a
double-shafted motor).
5. Unscrew the motor and remove.
6. Insert the replacement motor (plug must face front of fan
board) and drive the screws in with 100 in·lb of torque.

Coil Cleaning

Periodically the hydronic coils should be cleaned from dirt
accumulation that could reduce the unit performance. To clean
the equipment coil:
1. Remove the unit's front panel.
2. Remove the unit's front nosing.
3. Removed the coil's solid steel front cover.
Maintenance
93