Bryant DURAPAC 579F Installation, Start-Up And Service Instructions Manual page 29

CERAMIC
BAFFLE
CLIP
HEAT EXCHANGER
TUBES
NOTE: One baffle and clip will be in each upper tube of the heat exchanger.
Fig. 37 — Removing Heat Exchanger
Ceramic Baffles and Clips
C. Combustion-Air Blower
Clean periodically to assure proper airflow and heating effi-
ciency. Inspect blower wheel every fall and periodically during
heating season. For the first heating season, inspect blower
wheel bi-monthly to determine proper cleaning frequency.
To inspect blower wheel, remove heat exchanger access
panel. Shine a flashlight into opening to inspect wheel. If
cleaning is required, remove motor and wheel assembly by
removing screws holding motor mounting plate to top of com-
bustion fan housing. The motor and wheel assembly will
slide up and out of the fan housing. Remove the blower wheel
from the motor shaft and clean with a detergent or solvent.
Replace motor and wheel assembly.
D. Coil Maintenance and Cleaning Recommendation
Routine cleaning of coil surfaces is essential to maintain
proper operation of the unit. Elimination of contamination
and removal of harmful residues will greatly increase the life
of the coil and extend the life of the unit. The following main-
tenance and cleaning procedures are recommended as part of
the routine maintenance activities to extend the life of the
coil.
Remove Surface Loaded Fibers
Surface loaded fibers or dirt should be removed with a vac-
uum cleaner. If a vacuum cleaner is not available, a soft non-
metallic bristle brush may be used. In either case, the tool
should be applied in the direction of the fins. Coil surfaces
can be easily damaged (fin edges can be easily bent over and
damage to the coating of a protected coil) if the tool is applied
across the fins.
NOTE: Use of a water stream, such as a garden hose, against
a surface loaded coil will drive the fibers and dirt into the
coil. This will make cleaning efforts more difficult. Surface
loaded fibers must be completely removed prior to using low
velocity clean water rinse.
Periodic Clean Water Rinse
A periodic clean water rinse is very beneficial for coils that
are applied in coastal or industrial environments. However,
it is very important that the water rinse is made with very
low velocity water stream to avoid damaging the fin edges.
Monthly cleaning as described below is recommended.
Routine Cleaning of Coil Surfaces
Monthly cleaning with Totaline® environmentally sound coil
cleaner is essential to extend the life of coils. This cleaner is
available from Replacement parts division as part number
P902-0301 for a one gallon container, and part number
P902-0305 for a 5 gallon container. It is recommended that all
coils, including standard aluminum, pre-coated, copper/copper
or E-coated coils be cleaned with the Totaline environmentally
sound coil cleaner as described below. Coil cleaning should be
part of the unit's regularly scheduled maintenance procedures
to ensure long life of the coil. Failure to clean the coils may
result in reduced durability in the environment.
Avoid the use of:
• Coil brighteners
• Acid cleaning prior to painting
• High pressure washers
• Poor quality water for cleaning
Totaline environmentally sound coil cleaner is non-flammable,
hypoallergenic, nonbacterial, and a USDA accepted biode-
gradable agent that will not harm the coil or surrounding
components such as electrical wiring, painted metal surfaces,
or insulation. Use of non-recommended coil cleaners is
strongly discouraged since coil and unit durability could be
affected.
Totaline Environmentally Sound Coil Cleaner Application
Equipment
• 2 1 / gallon garden sprayer
2
• Water rinse with low velocity spray nozzle
CAUTION: Harsh chemicals, household bleach or
acid or basic cleaners should not be used to clean
outdoor or indoor coils of any kind. These cleaners can
be very difficult to rinse out of the coil and can
accelerate corrosion at the fin/tube interface where
dissimilar materials are in contact. If there is dirt
below the surface of the coil, use the Totaline
environmentally sound coil cleaner as described
above.
CAUTION: High velocity water from a pressure
washer, garden hose, or compressed air should never
be used to clean a coil. The force of the water or air jet
will bend the fin edges and increase airside pressure
drop. Reduced unit performance or nuisance unit
shutdown may occur.
Totaline Environmentally Sound Coil Cleaner Application
Instructions
1. Proper eye protection such as safety glasses is recom-
mended during mixing and application.
2. Remove all surface loaded fibers and dirt with a vac-
uum cleaner as described above.
3. Thoroughly wet finned surfaces with clean water and
a low velocity garden hose, being careful not to bend
fins.
4. Mix Totaline environmentally sound coil cleaner in a
2 1 / gallon garden sprayer according to the instruc-
2
tions included with the cleaner. The optimum solu-
tion temperature is 100 F.
NOTE: Do NOT USE water in excess of 130 F, as the enzy-
matic activity will be destroyed.
5. Thoroughly apply Totaline environmentally sound
coil cleaner solution to all coil surfaces including
finned area, tube sheets and coil headers.
6. Hold garden sprayer nozzle close to finned areas and
apply cleaner with a vertical, up-and-down motion.
Avoid spraying in horizontal pattern to minimize
potential for fin damage.
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