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UNT-SVX07A-EN 67
Maintenance
maintenance
procedures
Maintenance Procedures
Perform the following maintenance
procedures to ensure proper unit
operation.
WARNING
Live Electrical Components!
During installation, testing, servicing,
and troubleshooting this equipment, it
may be necessary to work with live
electrical components. Have a
qualified licensed electrician or other
individual who is properly trained in
handling live electrical components
perform these tasks. Failure to follow
all electrical components could result
in death or serious injury.
WARNING
Hazardous Voltage w/Capacitors!
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 an
appropriate voltmeter that all
capacitors have discharged. Failure to
disconnect power and discharge
capacitors before servicing could
result in death or serious injury.
Air Filters
Change or clean air filters at least twice a
year. Filters require more frequent care
under high load or dirty air conditions
since a clogged filter reduces airflow.
Table M-A-1 lists filter size and quantity
by unit size. Throwaway and pleated
media filters are available for all units.
Follow the instructions below to replace
the disposable filters.
All models except vertical cabinets
Remove the front panel of the vertical
recessed unit and open the bottom panel
door of the horizontal cabinet and
horizontal recessed unit to access the
filter. The front panel of the vertical
cabinet unit does not require removal to
change the filter.
Note: Vertical recessed, horizontal
cabinet, & horizontal recessed units with
a bottom return have filter guides to
secure the filter in position. Also, if these
unit types have a fresh air opening, they
require an additional filter for the fresh air
opening.
CAUTION
Replace all panels and filters
properly!
All unit panels and filters must be in
place prior to unit startup. Failure to
have panels and filters in place may
result in equipment damage.
Inspecting and Cleaning Drain Pans
Clean the fan-coil unit’s main and
auxiliary drain pans to ensure the unit
drains condensate properly.
Check the condensate drain pan and
drain line to assure the condensate drains
properly at least every six months or as
dictated by operating experience.
If evidence of standing water or conden-
sate overflow exists, immediately identify
and remedy the cause.
Clean the drain pans of any moisture or
debris.
Auxiliary Drain Pan
1. To remove the auxiliary drain pan,
loosen the hose clamp (installer
supplied) around the drain connection
collar and disconnect the drain line.
2. Remove the overflow drain line to the
auxiliary drain pan if it was installed.
3. Remove the condensate overflow
switch option from the auxiliary drain
pan.
4. Slide the pan horizontally towards the
end of the large groove of the mounting
slots in the chassis end panel and
remove pan from unit. See Figure M-
MP-2.
Figure M-MP-2. Insert the auxiliary drain pan
tabs into these slots in the fan-coil’s chassis
end panel. A horizontal unit shown.
Figure M-MP-1. When replacing the fan-
coil’s main drain pan, install it correctly
under the z-bar.
Z-Bar
Main Drain
Coil
Side
Main Drain Pan
See Figure M-MP-1 to replace main drain
correctly.
Vertical Units
To remove the main drain pan on vertical
fan-coil units, disconnect the clips holding
the pan to the fanboard. Disconnect the
main and overflow drain hoses and slide
pan forward to remove. See Figure M-
MP-3.
Horizontal Units
To remove the main drain pan on a
horizontal fan-coil unit, peel the insulation
from the edges of the pan’s underside to
access the mounting screws. Remove the
screws and lower the end of the drain
pan closest to the control box. Remove
the drain spout by pulling it from the hole
in the chassis end panel. See Figure M-
MP-4.
Note: Do not operate the fan-coil unit
without the main and auxiliary drain pans
in place to prevent condensate leakage.
aux. drain pan attaches to these slots