Carrier 48TJ016-028 - Manual (Page 39)

SERVICE
^ WARNING
Before performing service or maintenance operations on
unit, turn off main power switch to unit and install lockout
tag on disconnect switch. Electrical shock could cause per­
sonell injuiy.
Cleaning — inspect unit interior at beginning of each
heating and cooling season and as operating conditions require
(see Fig. 48). Remove unit top panel and/or side panels for ac­
cess to unit interior.
COIL MAINTENANCE AND CEEANING RECOMMEN­
DATION — Routine cleaning of coil surfaces is essential to
maintiiin proper operation of the unit. Elimination of contami­
nation and removal of harmful residues will greatly increase
the life of the coil and extend the life of tlie unit. The following
maintenance and cleaning procedures are recommended as part
of the routine maintenance activities to extend the life of the
coil.
INDUCED DRAFT INTEGRATED GAS VIEW CONTROL BOX
MOTOR
UNIT CONTROLLER PORT ACCESS PANEL
Fig. 48 — Typical Gas Heating Section
Remove 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-metallic bristle bmsh may
be used. In either case, the tool should be applied in the direc­
tion of the fins. Coil surfaces can be easily damaged (fin edges
can be easily bent over and damage to the coating of a protect­
ed 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 tlie fibers and dirt into the coil.
This will make cleaning efforts more difficult. Suiface loaded
fibeisi must be completely removed prior to using low velocity
clean water rinse.
Periodic Clean Water Rinse — A periodic clean water rinse is
veiy beneficial for coils that are applied in coastal or industrial
environments. However, it is veiy important that the water
rinse is made with veiy low velocity water stream to avoid
damaging tlie fin edges. Monthly cleaning as described below
is recommended.
Routine Cleaning of Coil Surfaces — Montlily cleaning with
Totaline® environmentally sound coil cleaner is essential to
extend the life of coils. This cleaner is available from Canier
Replacement parts division as part number P902-0.'301 for a
one gallon container, and part number P902-0.805 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
reguUirly scheduled maintenance procedures to ensure long life
of the coil. Failure to clean the coils may result in reduced du­
rability 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-flamma­
ble, hypoallergenic, nonbacterial, and a USDA accepted biode­
gradable agent that will not harm the coil or surrounding com­
ponents such as electrical wiring, piiinted 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 V 2 gallon garden sprayer
• Water rinse with low velocity spray nozzle
A CAUTION
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 veiy difficult to rinse out
of the coil and can accelerate corrosion at the fm/tube inter­
face where dissimilar materials are in contact. If there is
dirt below the surface of tlie coil, use the Totaline environ­
mentally sound coil cleaner as described above.
A 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 vacuum
cleaner as described above.
.4. Tlioroughly 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 V 2 gallon gai'den sprayer according to the instmctions
included with the cleaner. The optimum solution temper­
ature is lOOF.
NOTE: Do NOT USE water in excess of 1.30 F, as the enzy­
matic activity will be destroyed.
5. Tlioroughly 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 ap­
ply cleaner with a vertical, up-and-down motion. Avoid
spraying in horizontal pattern to minimize potential for
tin damage.
7. Ensure cleaner thoroughly penetrates deep into finned
ai'eas.
8. Interior and exterior finned tu'eas must be thoi'oughly
cleaned.
9. Finned surfaces should remain wet with cleaning solution
for 10 minutes.
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