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Service & Maintenance
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. Failure to disconnect power
before servicing could result in death or serious injury.
Filters
•
Inspect the return air filters. Clean or replace them if
necessary. Refer to the
information.
Cooling Season
•
Check the unit's drain pans and condensate piping to
ensure that there are no blockages.
•
Inspect the evaporator coils for dirt, bent fins, etc. If the
coils appear dirty, clean them according to the
instructions described in "Coil Cleaning" later in this
section.
•
Inspect the F/A-R/A damper hinges and pins to ensure
that all moving parts are securely mounted. Keep the
blades clean as necessary.
•
Verify that all damper linkages move freely; lubricate
with white grease, if necessary.
•
Check supply fan motor bearings; repair or replace the
motor as necessary.
•
Check the fan shaft bearings for wear. Replace the
bearings as necessary.
•
Lubricate the supply fan shaft bearings with a lithium
based grease. Refer to
recommended greases.
Important:
The bearings are manufactured using a
special synthetic lithium based grease
designed for long life and minimum lube
intervals. Over lubrication can be just as
harmful as not enough.
Use a hand grease gun to lubricate these bearings; add
grease until a light bead appears all around the seal. Do
not over lubricate! After greasing the bearings, check the
setscrews to ensure that the shaft is held securely to the
bearings and fan wheels. Make sure that all bearing
supports are tight.
•
Check the supply fan belt(s). If the belts are frayed or
worn, replace them. Refer to the "Fan Belt Adjustment"
section for belt replacement and adjustments.
•
Check the condition of the gasket around the control
panel doors. These gaskets must fit correctly and be in
good condition to prevent water leakage.
•
Verify that all wire terminal connections are tight.
•
Remove any corrosion present on the exterior surfaces
of the unit and repaint these areas.
112
Table 35, p. 101
for filter
Table 37, p. 101
for
•
Generally inspect the unit for unusual conditions (e.g.,
loose access panels, leaking piping connections, etc.)
•
Make sure that all retaining screws are reinstalled in
the unit access panels once these checks are complete.
Heating Season
Before completing the following checks, turn the unit OFF
and lock the main power disconnect switch open.
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. Failure to disconnect power
before servicing could result in death or serious injury.
•
Inspect the unit's air filters. If necessary, clean or
replace them.
•
Check supply fan motor bearings; repair or replace the
motor as necessary.
•
Lubricate the supply fan shaft bearings with a lithium
based grease. Refer to
recommended greases.
Important:
The bearings are manufactured using a
special synthetic lithium based grease
designed for long life and minimum lube
intervals. Too much lubrication in a bearing
can be just as harmful as not enough.
Use a hand grease gun to lubricate the bearings; add
grease until a light bead appears all around the seal. Do
not over lubricate! After greasing the bearings, check the
setscrews to ensure that the shaft is held securely. Make
sure that all bearing braces are tight.
•
Inspect both the main unit control panel and heat
section control box for loose electrical components
and terminal connections, as well as damaged wire
insulation. Make any necessary repairs.
•
Gas Heat Units only - Check the heat exchanger for any
corrosion, cracks, or holes.
•
Check the combustion air blower for dirt. Clean as
necessary.
Note: Typically, it is not necessary to clean the gas
furnace. However, if cleaning does become
necessary, remove the burner inspection plate
from the rear of the heat exchanger to access the
drum. Be sure to replace the existing gaskets with
new ones before reinstalling the inspection plate.
•
Open the main gas valve and apply power to the unit
heating section; then initiate a "Heat" test using the
start-up procedure described in "Gas Furnace Start-
Up".
•
Verify that the ignition system operates properly.
Table 37, p. 101
for
RT-SVX35H-EN
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