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The repair procedure requires the use of MAPP gas and
torch (must be supplied by servicer) instead of conventional
oxyacetylene fuel and torch. While the flame temperature
for MAPP is lower than that of oxyacetylene (and thus
provides more flexibility when working on aluminum), the
flame temperature is still higher than the melting
temperature of aluminum, so user caution is required. Follow
instructions carefully. Use the heat shield.
Replacing NOVATIONt Condenser Coil —
The service replacement coil is preformed and is equipped
with transition joints with copper stub tubes. When
brazing the connection joints to the unit tubing, use a wet
cloth around the aluminum tube at the transition joint.
Avoid applying torch flame directly onto the aluminum
tubing.
Routine Cleaning of Round-Tube Plate Fin (RTPF)
Coils —
Periodic cleaning with Totaline
®
environmentally sound coil
cleaner is essential to extend the life of RTPF coils. This
cleaner is available from the 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 RTPF coils be cleaned with the
Totaline environmentally sound coil cleaner as described
below.
NOTE: Do NOT use Totaline
®
environmentally sound coil
cleaner, or any other coil cleaner on NOVATION coils. See
“NOVATION Coil Cleaning and Maintenance” for
instructions on cleaning NOVATION coils.
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:
S coil brighteners
S acid cleaning prior to painting
S high pressure washers
S poor quality water for cleaning
Totaline environmentally sound coil cleaner is
non-flammable, hypoallergenic, non-bacterial, and a
USDA accepted biodegradable 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 —
S 2
1
/
2
gallon garden sprayer
S water rinse with low velocity spray nozzle
UNIT DAMAGE HAZARD
Failure to follow this caution may result in corrosion
and damage to the unit.
Harsh chemicals, household bleach or acid or basic
cleaners should not be used to clean outdoor or indoor
coils or 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
!
UNIT RELIABILITY HAZARD
Failure to follow this caution may result in reduced
unit performance.
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.
CAUTION
!
Totaline Environmentally Sound Coil Cleaner
Application Instructions:
NOTE: Proper eye protection such as safety glasses is
recommended during mixing and application.
1. Turn off unit power.
2. Remove screws holding rear corner post and top cover
in place. Pivot top cover up 12 to 18 inches (305 to 457
mm) and support with a rigid support. See Fig. 43.
3. Remove all surface loaded fibers and dirt with a vacu-
um 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 surface loaded coil will drive the fibers and dirt
into the coil, making cleaning efforts more difficult.
Surface loaded fibers must be completely removed prior
to using low velocity clean water rinse.
4. Using a low velocity garden hose thoroughly wet
finned surfaces with clean water. Be careful not to
bend the fins.
5. Mix Totaline environmentally sound coil cleaner in a
2
1
/
2
gallon garden sprayer according to the instruc-
tions included with the cleaner. The optimum solution
temperature is 100°F(38°C).
NOTE: Do NOT USE water in excess of 130°F(54°C),
as the enzymatic activity will be destroyed.
6. Thoroughly apply Totaline
®
environmentally sound
coil cleaner solution to all coil surfaces including the
finned area, tube sheets and coil headers.
569J