Service; Cleaning - Carrier 50PG20-28 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

SERVICE
Before performing smTice or ruaintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.
Puron,_R)(R-410A) reliigerant systems operate at higher
pressures than standard R-22 systerus. Do not use R-22
service equipruent or coruponents on Puron refi-igerant
equipruent. If service equipment is not rated for Puron
reti-igerant, equipment dmnage or personal injury may
result.
1. hnproper installation, adjustruent, alteration, service,
or ruaintenance can cause property daruage, personal
injury, oi loss of li*_.Refer to the User's Int_nnation
Manual provided with this unit for more details.
2. Do not store or use gasoline or other flmrunabte
vapors and liquids in the vicinity of this or any other
appliance.
What to do if you smell gas:
1. DO NOT try to light any appliance.
2. DO NOT touch any electrical switch, or use any
phone in your building.
3. IMMEDIATELY call your gas supplier fioru a neigh-
bor's phone. Follow the gas supplier's instructions.
4. If you cannot reach your gas suppliel; call the fire
departruent.
This will make cleaning eftbrts more difficult. Surfi_ce 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 axe applied in coastal or industrial
environruents. However, it is very iruportant that the water
rinse is made with very low velocity water streaan to avoid
daruaging the tin edges. Monthly cleaning as desca-ibedbelow
is recoruruended.
Routine Cleanin_ of Coil Surfaces Monthly cleaning with
Totaline,oR) enviropanentally sound coil cleaner is essential to
extend the life of coils. This cleaner is available fioru Carrier
Replaceruent parts division as part nuruber P902-0301 for a
one gallon container, and part nuruber P902-0305 tbr a 5 gallon
container. It is recolrunended that all coils, including standard
aluruinuru, pre-coated, copper/copper or E-coated coils be
cleaned with the Totatine enviropanentally sound coil cleaner
as described belo,a: Coil cleaning should be part of the unit's
regularly scheduled ruaintenance procedures to ensure tong lil_
of the coil. Failure to clean the coils may result in reduced du-
rability in the enviropanent.
Avoid the use of:
• coil brighteners
• acid cleaning prior to painting
• high pressure washers
• poor quality water t\_r cleaning
Totaline environruentally sound coil cleaner is non-flmruna-
ble, hypoatlergenic, nonbacterial, and a USDA accepted biode-
gradable agent that will not harm the coil or surrounding com-
ponents such as electrical wiring, painted metal surthces, or in-
snlation. Use of non-recolrunended coil cleaners is strongly
discouraged since coil and unit durability could be affected.
Tolaline Envitvnmemally So_md Coil (Teaner Application
Eql lip174el) t
• 2t/z gallon garden sprayer
• water rinse with low velocity spray nozzle
Disconnect gas piping tioru unit when pressure testing at
pressure reeater than 0.5 psig. Pressures re'eater than
0.5 psig will cause gas valve &nnage resulting in hazardous
condition. If gas valve is snbjected to pressure reeater than
0.5 psig, it must be replaced before use. When pressure
testing field-supplied gas piping at pressures of 0.5 psig or
less, a unit connected to such piping must be isolated by
closing the ruanual gas valve(s).
Cleaning -- Inspect unit interior at beDnning of each heat-
ing and cooling season and as operating conditions require. Re-
move unit top panel and/or side panels tbr access to unit interior.
COIL MAINTENANCE AND CLEANING RECOMMEN-
DATION Routine cleaning of coil surfaces is essential to
ruaintain proper operation of the unit. Elimination of contami-
nation and removal of harmful residues will reearly increase
the life of the coil and extend the life of the unit. The following
ruaintenance and cleaning procedures are recolrnnended as
part of the routine ruaintenance activities to extend the life of
the coil.
Remove Surface Loaded Fibers Surthce loaded fibers or
dirt should be reruoved with a vacuuru cleaner. If a vacuum
cleaner is not available, a soft non-ruetallic bristle brash may
be used. hi either case, the tool should be applied in the direc-
tion of the tins. Coil surfaces can be easily daruaged (tin edges
can be easily bent over and daruage to the coating of a protect-
ed coil) if the tool is applied across the fins.
NOTE: Use ofa ,a_aterstrearu, such as a garden hose, against a
surface loaded coil wilt drive the fibers and dirt into the coil.
Harsh cheruicals, 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 Totatine,_R_ envi-
ropanentally sound coil cleaner as described above.
! , •
High velocity ,a_atertioru a pressure ,a_asher, garden hose,
or corupressed air should never be used to clean a coil. The
force of the water or air jet will bend the tin edges and
increase airside pressure drop. Reduced unit performance
or nuisance unit shutdown may occur.
Tomline Environmentally Sound Coil Cleaner Application
Inslmtctions
1. Proper eye protection such as safety glasses is recoru-
mended during mixing and application.
2. Remove all surface loaded fibers and dirt with a vacuum
cleaner as desca-ibedabove.
3. Thoroughly wet finned surfaces with clean water and a
low velocity garden hose, being careful not to bend fins.
4. Mix Totaline enviropanentally sound coil cleaner in a
21/2 gallon garden sprayer according to the instructions
included with the cleaner. The optimum solution temper-
ature is 100 F.
85