Periodic Maintenance
Checklist
The following checklist is
provided as a recommended maintenance
schedule. Detailed instructions for specific
maintenance procedures are given after the
checklist.
WARNING: Disconnect electrical
power source and secure in
disconnected position before
servicing the unit. Failure to do
so may result in personal injury
or death from electrical shock.
Every month:
•
Inspect the unit air filter. Clean or
replace clogged filter element.
•
Check the drain pan to be sure that it
is clean and free to carry the flow of
condensate through the drain line.
Every year:
•
Inspect the unit casing for corrosion.
Clean or repair to provide unit protection.
•
Inspect the fan wheel and housing for
damage. Rotate the fan wheel manually to
be sure no obstructions block its
movement.
•
Inspect the coil fins for excessive dirt or
damage. Remove dirt and straighten fins.
•
Clean and tighten all electrical
connections.
•
Drain and treat the whole system to
control pipe scaling.
CAUTION: The use of untreated or
improperly treated water in this
equipment may result in scaling, erosion,
corrosion, algae or slime. The services of
a qualified water treatment specialist
should be engaged to determine what
treatment if any, is advisable. The Trane
Company assumes no liability for the
results of the use of untreated or
improperly treated water.
Maintenance
Maintenance Procedures
Change/Clean Filters
Change or clean air filters at least twice a year.
Filters will require more frequent care under
high load conditions or dirty air. A clogged air
filter reduces airflow, cooling capacity and
increases energy usage. Permanent (cleanable),
or replaceable media filters are acceptable for
all units.
To change filters with replaceable media:
1. Disconnect electrical power source.
2. Loosen two screws and brackets at the
rear of return plenum.
3. Pull out the filter and frame from the
return plenum.
4. Remove two screws from the frame.
5. Replace media in the frame.
6. Follow the opposite procedure to re-install
the filter frame
7. Re-connect the electrical power source. To
clean permanent filters, remove the filter
media and wash it in water to remove dust, dirt
and lint; allow to dry thoroughly before re-
installing in the unit.
Change Entire Fan Board
The entire fan board can be changed by
completing the following steps:
1. Turn off the electrical power source and then
disconnect the motor wires. Allow the rotating
fan wheel to stop.
2. Disconnect the grounding wire.
3. Remove the return plenum, if applicable.
4. Loosen the screws fastened on the keyholes
at four corners of the fan board, as shown
on Figure 8-1.
5. Remove other screws from the upper side of
the fan board, if applicable, as shown on
Figure 8-2.
6. Lift up the fan board about 14mm and then
pull the entire fan board from the unit through
the keyholes.
14
CAUTION: Due to the dimensions and weights of
the fan board, at least two installers is
recommended to do this step for safety.
7. Follow the opposite procedures to reinstall the
new fan board.
Clean up debris on the coil and the inside of unit
casing before installing the fan board. Also check for
debris on the fan wheel before start-up.
Change Fan Housing/Fan Wheel
The fan housing/fan wheel can be replaced, without
removing the entire fan board from the unit, by
completing the following steps:
1. Turn off the electrical power source and then
disconnect the motor wires. Allow the rotating
fan wheel to stop.
2. Remove the filter and return plenum from the unit,
if applicable.
3. Loosen the bolt, located in the center of the fan
wheel, which fastens the fan wheel and motor
shaft together.
4. Remove the four screws that fasten the fan
housing and fan board together, as shown on
Figure 8-3.
5
．
Unscrew the nuts fixing fan blade and motor
shaft in the middle of fan blade.
6. Pull out the fan housing about 20mm from the fan
board and then remove the fan housing and
wheel from the motor shaft.
7. Once the fan housing is separated from the
fan board and motor shaft, the fan wheel can
then be taken out of the fan housing by the
following steps.
•
Remove two screws on top panel of the fan
housing, as shown on Figure 8-4.
•
Lift up the flexible top panel and then
remove the fan wheel out of the fan housing.
8. After replacing the fan housing or fan wheel,
follow the opposite procedures to re-install.
