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Maintenance
Service Access
Access unit controls through the front, top left panel. The
panel is secured with two quick- acting fasteners and an
automatic latch, which require a screwdriver to remove.
Removable unit panels on the right-hand side provide
access to compressors, fan, motor belts, extended grease
line fittings, and drive side bearing. On the unit's left side,
removable panels allow access to the expansion valves,
filter driers, refrigerant sight glasses, liquid line valves,
opposite drive fan bearing, extended grease line fittings,
condensers, and waterside economizer control valve.
The compressor, condenser, and fan motor access panels
are secured with quick acting fasteners. Fast thread screws
secure access panels for economizer coils, evaporator
coils expansion valves, water valves, and left fan bearing.
Access to other components requires removal of
semipermanent panels secured with sheet metal screws.
During operation, sight glasses are viewable through the
portholes on the unit's left upper panel.
Variable Frequency Drive (VFD)
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.
The VFD access panel is hinged to allow service access to
the fan motor and belt drive components that are located
behind it. To swing the panel open:
1. Remove the unit center cover panel to the left of the
VFD panel.
2. Remove and discard the sheet metal shipping screws
along the top and bottom edges of the VFD panel.
3. Disconnect the communications cable from the keypad
on the VFD door panel.
4. Turn the two slotted-head fasteners on the right edge of
the VFD panel fully counterclockwise.
5. Pull on the handle to swing the panel 180°.
To close and reattach the panel, reverse the procedures
listed above.
76
Notes:
•
To secure the panel in the open position during
service procedures, attach the chain mounted
to the cabinet frame behind the unit center
cover panel to the chain retainer notch on the
edge of the VFD panel.
•
Verify that all wires are in their proper position
and not rubbing before replacing the panel.
•
Panel weight rating = 225 lbs. total, including
factory-installed components.
Air Filters
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.
Filter access doors are on the unit's left side. Filter access
for the 2" filter rack on optional steam and hot water coils
and airside economizers is also on the left side of the unit.
To replace throwaway filters, remove the dirty elements
and install new filters with the filter's directional arrows
pointing toward the fan. Verify that no air bypasses the
filters. See
Figure 38, p. 77
filter placement.
and
Figure 39, p. 77
for proper
SCXF-SVX01T-EN
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