Thermo King T-1080S, Maintenance Manual

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Structural Maintenance
Unit and Engine Mounting Bolts
Periodically check and tighten all unit and engine
mounting bolts. Torque the unit mounting
bolts to 60 ft-lb (81 N•m). Torque the engine
mounting bolts to 64 ft-lb (87 N•m).
Unit Inspection
Inspect the unit during unit pretrip inspection and
scheduled maintenance inspections for loose or
broken wires or hardware, compressor oil leaks,
or other physical damage which might affect unit
performance and require repair or replacement of
parts.
Condenser, Evaporator and
Radiator Coils
Clean the coils during scheduled maintenance
inspections. Remove any debris (e.g., leaves or
plastic wrap) that reduces the air flow. Clean dirty
coils with compressed air or a pressure washer. Be
careful not to bend the fins when cleaning a coil.
If possible, blow the air or water through the coil
in the direction opposite the normal air flow.
Repair bent fins and any other noticeable damage.
Micro-Channel Coil Cleaning
Recommendations
Cleaning Intervals
• The coils should be cleaned a Minimum of
once a year.
• It is recommended that any time the unit is in
for service or maintenance that the coils be
inspected and cleaned if needed.
• The coil should be cleaned if there are visible
accumulations that obstruct the view of the
fins or tubes of the coil.
• The coils should be cleaned if there is debris
imbedded in the tubes and fins
The area and conditions in which the unit operates
will dictate the cleaning intervals and method(s)
needed.
Cleaning Methods (listed in order of
recommended method)
• Take a cloth or towel and wipe the air side of
the coil going with the fins, across the tubes.
(Results shown in Figure 255.) The coil will
clean in a manner similar to the way lint
cleans from the lint trap of a household
clothes dryer.
• Use a soft bristled brush (DO NOT USE A
WIRE BRUSH) and brush the coil going with
the fins, across the tubes. The coil will clean
in a manner similar to the way lint cleans from
the lint trap of a household clothes dryer.
• A vacuum with a soft attachment can be used
to suck the debris off the face as well as in the
fins and tubes from the air side of the coil.
• Compressed air can be used and will work
best when blown thru the coil from the non-air
side when possible. Blowing thru from the
airside may imbed debris in the coil that was
only on the surface. It is recommended to start
with one of the first three options before using
compressed air if the non-air side is not
accessible. The angle at which the air should
be directed at the coil should not be less than
75 degrees (see Figure 256).
Chemicals to aid in cleaning WILL VOID
WARRANTY and are NOT RECOMMENDED.
In some instances in may take a combination of
two methods to result in a clean coil. Such as, first
wiping the coil to clean the surface and then using
a vacuum, water or compressed air to clean down
in the fins. This will depend on the type of debris
that needs to be cleaned from the coil.
Be sure not to contact the coil with any hard
vacuum nozzle, air nozzle, or any other tool. This
will damage the tubes of the coil.
CAUTION: Air pressure should not be
high enough to damage coil fins.
WARNING: The coil fins are very sharp
and can cause lacerations.