Maintenance; Owner Maintenance; Service Maintenance; Cooling Season - Trane 4DCY4024 Installer's Manual

Maintenance

Owner Maintenance

▲ !
EXPLOSION HAZARD!
To prevent an explosion or possible injury, death, and equip-
ment damage. Do not store combustible materials, gasoline,
or other flammable vapors or liquids near the unit.
Some of the periodic maintenance functions of the packaged
unit can be performed by the owner; this includes replacing
the disposable or cleaning the permanent air filters, cleaning
the unit cabinet, and conducting a general unit inspection on a
regular basis.
Filters
When the system is in constant operation, inspect the filters
at least once each month.
If you have disposable-type filters, replace them with new filters
of the same type and size. Do not attempt to clean dispos-
able filters.
Permanent-type filters can be cleaned by washing them with a
mild detergent and water. Make sure that the filters are thoroughly
dry before reinstalling them.
NOTE: It may be necessary to replace permanent filters
annually if washing fails to clean the filter or if the filter shows
signs of deterioration. Be sure to use the same type and
size as was originally installed.
Condenser Coil
Be sure to keep all vegetation and debris away from the condenser
coil area.

Service Maintenance

Service maintenance should be performed by qualified service
personnel.

Cooling Season

To keep the unit operating safely and efficiently, the manufac-
turer recommends that a qualified service technician check the
entire system at least once each year or more often if needed.
The service technician should examine these areas of the
packaged unit:
filters (for cleaning or replacement)
●
motors and drive system components
●
economizer gaskets (for possible replacement)
●
safety controls (for mechanical cleaning)
●
electrical components and wiring (for possible replacement
●
and connection tightness)
condensate drain (for proper sealing and cleaning)
●
unit duct connections (to see that they are physically sound
●
and sealed to the unit casing)
unit mounting support (for structural integrity)
●
the unit (for obvious unit deterioration)
●
WARNING
Installer's Guide

Heating Season

Complete the following unit inspections and service routines
described at the beginning of each heating season.
Visually inspect the unit to ensure that the airflow required
●
for combustion and condenser coil is not obstructed from the
unit.
Inspect the control panel wiring to verify that all electrical
●
connections are tight and that the wire insulation is intact.
Check the operation of the gas ignition system as follows:
●
Turn off the gas supply with the unit operating to verify that
the gas valve closes and that a re-ignition cycle is initiated
by the unit.
Visually inspect the inside of the burners and the burner ports
●
for deposit buildup and corrosion. Wipe and brush the inside
of the burner and the burner ports and then clean with a dry
cloth. If the deposit buildup or corrosion is excessive, replace
the burners.

Flue Hood and Combustion Blower Cleaning

▲ !
Never use combustible cleaning fluids on any part of the
furnace.
Before each heating season, the flue should be inspected for
signs of flaking rust and soot deposits. Dirty flues should
be cleaned by qualified service personnel ONLY using the
following procedure:
Turn the comfort control to OFF. Turn the main power
1.
disconnect OFF. Turn the manual gas valve OFF.
2. Remove the flue hood and the CONTROL/HEAT access
panel.
3. Remove the combustion blower assembly from the flue box.
Remove the flue box and the flue restrictors.
4. Remove all wires from the gas valve while carefully noting
their locations.
5. Disconnect the gas supply line from the valve.
6. Remove the manifold retaining screws and pull the burner-
manifold assembly from the heat exchanger.
7. Remove the inlet turbulators being careful not to break or
damage them.
8. Wipe the flue box and flue baffles clean with a clean, dry
cloth.
9. Replace all gaskets with new ones.
10. Replace all damaged or broken turbulators with new ones.
11. Reassemble the unit by reversing Steps 2 through 7 above.
Take care that all gaskets seat properly.
12. Check all wires for correct installation by referring to the unit
electrical wiring diagram in the SERVICE FACTS.
13. Leak test all gas line connections with a soap and water
solution or the equivalent.
14. Re-install the CONTROL/HEAT access panels and the flue
hood.
15. Visually inspect the unit to ensure that the airflow opening
for combustion is not obstructed.
16. Follow the start-up procedure on page 22 to place the unit
back in service.
CAUTION
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