Carrier WeatherMaster Puron 48HC D17, Service And Maintenance Instructions, Page: 9 / 100

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Fig. 13 — Propping Up Top Panel
EVAPORATOR COILS
Evaporator Coil
The evaporator coil uses the traditional round-tube, plate-fin
(RTPF) technology. Tube and fin construction consists of vari-
ous optional materials and coatings (see Appendix A). Coils
are multiple-row. On two compressor units, the evaporator coil
is a face split design, meaning the two refrigerant circuits are
independent in the coil. The bottom portion of the coil will al-
ways be circuit A, with the top of the coil being circuit B.
Coil Maintenance and Cleaning Recommendation
Routine cleaning of coil surfaces is essential to maintain proper
operation of the unit. Elimination of contamination and remov-
al of harmful residues will greatly increase the life of the coil
and extend the life of the unit. The following maintenance and
cleaning procedures are recommended as part of the routine
maintenance activities to extend the life of the coil.
REMOVING SURFACE LOADED FIBERS
Surface loaded fibers or dirt should be removed with a vacuum
cleaner. If a vacuum cleaner is not available, a soft non-metal-
lic bristle brush can be used. In either case, the tool should be
applied in the direction of the fins. Coil surfaces can be easily
damaged. Applying the tool across the fin edges can cause the
edges to be easily bent over, damaging the coating of a protect-
ed coil.
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 wa-
ter rinse. A vacuum cleaner or a soft-bristled brush should be used
to remove surface-loaded fibers and dirt.
PERIODIC CLEAN WATER RINSE
A periodic clean water rinse is very beneficial for coils that are
used in coastal or industrial environments. However, it is very
important that the water rinse is made with a very low velocity
water stream avoiding damage to the fin edges. Monthly clean-
ing, as described below, is recommended.
ROUTINE CLEANING OF EVAPORATOR COIL SURFACES
Monthly cleaning with Totaline
®
environmentally sound coil
cleaner is essential to extend the life of the coils. This cleaner is
available from Carrier Replacement Parts Division (P/N: P902-
0301 for one gallon (3.8L) container, and P/N: P902-0305 for a
5 gallon (18.9L) container). It is recommended that all round
tube coils be cleaned as described below. Coil cleaning should
be part of the unit’s regularly scheduled maintenance procedures
ensuring a long life for the coil. Failure to clean the coils can re-
sult in reduced durability in the environment.
When cleaning the coils, avoid the use of the following:
• coil brighteners
• acid cleaning prior to painting
• high pressure washers
• poor quality water for cleaning
Totaline environmentally sound coil cleaner is non-flammable,
hypoallergenic, non-bacterial, and a USDA accepted biode-
gradable agent that will not harm the coil or surrounding com-
ponents such as electrical wiring, painted metal surfaces, or in-
sulation. 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 /
2
gallon (9.6L) garden sprayer
• water rinse with low velocity spray nozzle
Totaline Environmentally Sound Coil Cleaner Application
Instructions
1. Proper eye protection such as safety glasses, gloves and
protective clothing are recommended during mixing and
application.
2. Remove all surface loaded fibers and dirt with a vacuum
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 /
2
gallon (9.6L) 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 en-
zymatic 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.
7. Avoid spraying in horizontal pattern minimizing the
potential for fin damage.
8. Ensure cleaner thoroughly penetrates deep into finned
areas.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in accelerated cor-
rosion of unit parts.
Harsh chemicals, household bleach or acid or basic clean-
ers 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 inter-
face where dissimilar materials are in contact. If there is
dirt below the surface of the coil, use the Totaline environ-
mentally sound coil cleaner.
CAUTION
PERSONAL INJURY HAZARD
Failure to follow this caution can result in severe personal
injury and 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 in-
crease airside pressure drop.
High velocity water from a pressure washer can cause se-
vere injury upon contact with exposed bodily tissue. Al-
ways direct the water stream away from the body.