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

NOTE: DoNOTUSE water in excess of 130 F,astheenzy-
matic a ctivity w illbedestroyed.
5. Thoroughly apply Totaline e nviropanentalty scumcoil
cleaner solution toallcoilsurfaces including finned a rea,
tube sheets and coil h eaders.
6. Hold garden sprayer nozzle c lose t ofinned a reas and ap-
plycleaner withavertical, up-and-down motion. Avoid
spraying in horizontal pattern t ominimize p otential for
findamage.
7. Ensure c leaner thoroughly penetrates deep intofinned
areas.
8. Interior a ndexterior finned areas m ustbethoroughly
cleaned.
9. Finned s urfaces should remain w et w ithcleaning solution
for10minutes.
10. Ensure surfaces axe not a llowed t odry before r insing. Re-
applying c leaner asneeded to ensure 1 0-minute satura-
tionisachieved.
11.Thoroughly rinse allsurfaces withlowvelocity c lean w a-
terusing d ownward rinsing m otion o fwater spray nozzle.
Protect finsfiomdamage fiomthe spray nozzle.
CONDENSATE DRAIN Check a nd clean e ach y ear a tthe
start ofthe cooling s eason. Anaccess panel islocated above t he
condensate connection toallow easy c lean o utoftheconden-
sate p an. The first t ime the panel isremoved, the insulation be-
hindtheaccess panel will need tobecutaway. Carefully cut
the insulation withaknife orblade onthree s ides s o the insula-
tioncan befolded outofthe wayduring cleaning. Becareful
nottodamage components behind t he insulation while cutting.
Once c leaning iscompleted, foldthe insulation back into place
and secure the access panel inthe original position.
FILTERS Clean o rreplace atstart o feach h eating and cool-
ingseason, ormore often if operating conditions require. Refer
tounitinstallation instructions fortype and size.
OUTDOOR-AIR INLET SCREENSClean screens with
steam orhot w ater and amilddeteNent. Donot u se throwaway
filters inplace o fscreens. See unitinstallation instructions for
quantity and size.
MAINBURNER ( 48PG Only) At thebeginning of each
heating season, inspect fordeterioration orblockage due tocor-
rosion o rother causes. Observe the main burner tlmnes. Refer
toMain Burners section onpage 9 1.
FLUE GAS PASSAGEWAYS (48PG Only) Thetlue col-
lector b oxandheat e xchanger cellsmaybeinspected by
removing heat s ection access panel (Fig. 5 ),tlue boxcover, and
main burner assembly (Fig. 3 6). R efer toMain Burners section
onpage 91forburner removal sequence. If cleaning i s re-
qnired, clean t ubes withawire brush.
Use caution w ithcermnic heat e xchanger baffles. When i n-
stalling r etaining clip, b esure the center legofthe clipextends
inward t oward baffle. See Fig.37.
COMBUSTION-AIR BLOWER ( 48PG Only) Clean pe-
riodically t oassure proper airflow and heating e ffidenc3_ In-
spect blower wheel every talland periodically during h eating
season. Forthefirst h eating s eason, inspect blower wheel bi-
monthly todetermine proper cleaning fiequency.
To inspect blower wheel, remove heat section panel. Using
an inspection mirror and llashlight, look into the tlue exhaust
duct to inspect the wheel. If cleaning is required, relnove motor
and wheel assembly by removing the screws holding the flue
box cover to the tlue box. See Fig. 36. Rmnove the screws hold-
ing the inducer housing to the inlet plate. The wheel can then be
relnoved from the motor shaft and cleaned with a detergent or
solvent. Replace the wheel onto the motor shaft in the correct
position and reassmnble the tlue cover onto the tlue box.
HEAT
EXCHANGER
SECTION
IGC BOARD
(HIDDEN)
COMBUSTION
FAN HOUSING
INDUCED
DRAFT
MOTOR
MAI N GAS
VALVE
MAIN BURNER
SECTION
160 -- Integrated Gas Controller
Fig. 36 -- Typical Gas Heating Section
CERAMIC
BAFFLE
CLIP
NOTE: One baffle and clip will be in each upper tube of the heat
exchanger.
Fig. 37 -- Removing Heat Exchanger Ceramic
Baffles and Clips
Lubrication
COMPRESSORS Each compressor is charged with the
correct amount ofoit at the thctory.
The compressor is in a Puron,¢9reliigerant system and uses
a polyolester (POE) oil. This oil is extremely hygroscopic,
meaning it absorbs water readily. POE oils can absorb
15 times as much water as other oils desiNled for HCFC
and CFC refrigerants. Avoid exposure of the oil to the
atmosphere. Damage to components could result.
Polyolester (POE) compressor lubricants are known to
cause long term damage to some synthetic roofing materials.
Exposure, even if ilrnnediately cleaned up, may cause roofing
materials to become brittle (leading to cracking) within a
year. When pertbnning any service which may risk exposure of
compressor oil to the root; take appropriate precautions to
protect roofing. Procedures which risk oil leakage include com-
pressor replacement, repairing refrigerant leaks, and replacing
refrigerant components. To prepare rooftop:
1. Cover extended roof work area with an impermeable
plastic dropctoth or tarp. Make sure a 10 x 10 area around
the work area is covered.
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