Trane SEHJ090-162 Installation, Operation And Maintenance Manual page 153

CHM00021 at your localTrane parts center) or in an
alkaline detergent and warm water.
2. Soak the segments in the solution until grease, oil, and
tar deposits are loosened.
3. Before removing the cleaner, rapidly run your fingers
across the surface of segments to separate polymer
strips for better cleaning action.
4. Rinse the dirty solution from the segments and remove
the excess water before re-installing the segments in
the wheel.
Note: Some permanent staining of the desiccant may
remain but is not harmful to performance.
Cleaning Frequency
In reasonably clean office or school buildings, cleaning
with a coil cleaner solution may not be required for several
years. If the energy wheel is exposed to air streams
containing, for example, high levels of occupant tobacco
smoke, cooking facility exhaust air, or oil-based aerosols
found in machine shop areas, annual or more frequent
cleaning may be required to remove these contaminants
and restore performance. Periodic inspection of the wheel
should be done to determine the cleaning intervals.
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. Do not open the service access
doors while the unit is operating. Failure to disconnect
power before servicing could result in death or serious
injury.
WARNING
Rotating Components!
During installation, testing, servicing and
troubleshooting of this product it may be necessary to
work with live and exposed rotating components. Have
a qualified or licensed service individual who has been
properly trained in handling exposed rotating
components, perform these tasks. Failure to follow all
safety precautions could result in rotating components
cutting and slashing technician which could result in
death or serious injury.
High-maintenance applications may benefit from keeping
a spare set of clean segments on hand.This allows for
rapid change-out of clean segments with minimal
downtime.The dirty segments can then be cleaned at a
convenient time.
RT-SVX24J-EN
Segment Removal
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. Do not open the service access
doors while the unit is operating. Failure to disconnect
power before servicing could result in death or serious
injury.
Wheel segments for the low CFM energy recovery option
for the 90, 105, and 120 ton units are secured to the wheel
frame by a segment retainer that pivots on the wheel rim
and is held in place by a segment retaining catch. All other
units have larger sized wheels and have inner and satellite
segments.The satellite segments are secured to the wheel
frame by a segment retainer in the same fashion as the
outer segments for the above mentioned smaller low CFM
recovery wheels.The inner segments are secured to the
wheel center hub with a screw.
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. Do not open the service
access doors while the unit is operating. Failure to
disconnect power before servicing could result in death
or serious injury.
Outer and Satellite Segment Removal
Procedure:
1. Disconnect all electrical power.
2. Secure wheel from rotation.
3. Pry the segment retainer latch out from the catch. See
Figure 106. For the first or for an individual segment
removal, it will be necessary to do so on both sides of
the segment.
4. Remove the forked segment retainer(s). See
Figure 106. Again, for the first or for an individual
segment removal, it will be necessary to do so on both
sides of the segment.
5. Remove the segment from the wheel frame. It may be
necessary to gently pry the segment out of the wheel
with a screwdriver.
6. Pull the segment up and out of the wheel frame.
7. Close any open segment retainer prior to rotating the
wheel. Failure to close the retainer may damage the
retainer, seals, or segments.
8. Rotate the wheel and continue this procedure to
remove all segments. See
Unit Startup
Figure 107, p. 154.
153