Lubrication - Carrier 48PG20 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

NOTE: Do NOT USE water in excess of 130 F, as the enzy-
matic 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 ap-
ply cleaner with a vertical, up-and-down motion. Avoid
spraying in horizontal pattern to minimize potential for
fin damage.
7. Ensure cleaner thoroughly penetrates deep into finned
areas.
8. Interior and exterior finned areas must be thoroughly
cleaned.
9. Finned surfaces should remain wet with cleaning solution
for 10 minutes.
10. Ensure surfaces are not allowed to dry before rinsing. Re-
applying cleaner as needed to ensure 10-minute satura-
tion is achieved.
11. Thoroughly rinse all surfaces with low velocity clean wa-
ter using downward rinsing motion of water spray nozzle.
Protect fins from damage from the spray nozzle.
CONDENSATE DRAIN — Check and clean each year at the
start of the cooling season. An access panel is located above the
condensate connection to allow easy clean out of the conden-
sate pan. The first time the panel is removed, the insulation be-
hind the access panel will need to be cut away. Carefully cut
the insulation with a knife or blade on three sides so the insula-
tion can be folded out of the way during cleaning. Be careful
not to damage components behind the insulation while cutting.
Once cleaning is completed, fold the insulation back into place
and secure the access panel in the original position.
FILTERS — Clean or replace at start of each heating and cool-
ing season, or more often if operating conditions require. Refer
to unit installation instructions for type and size.
OUTDOOR-AIR INLET SCREENS — Clean screens with
steam or hot water and a mild detergent. Do not use throwaway
filters in place of screens. See unit installation instructions for
quantity and size.
MAIN BURNER (48PG Only) — At the beginning of each
heating season, inspect for deterioration or blockage due to cor-
rosion or other causes. Observe the main burner flames. Refer
to Main Burners section on page 91.
FLUE GAS PASSAGEWAYS (48PG Only) — The flue col-
lector box and heat exchanger cells may be inspected by
removing heat section access panel (Fig. 5), flue box cover, and
main burner assembly (Fig. 36). Refer to Main Burners section
on page 91 for burner removal sequence. If cleaning is re-
quired, clean tubes with a wire brush.
Use caution with ceramic heat exchanger baffles. When in-
stalling retaining clip, be sure the center leg of the clip extends
inward toward baffle. See Fig. 37.
COMBUSTION-AIR BLOWER (48PG Only) — Clean pe-
riodically to assure proper airflow and heating efficiency. In-
spect blower wheel every fall and periodically during heating
season. For the first heating season, inspect blower wheel bi-
monthly to determine proper cleaning frequency.
To inspect blower wheel, remove heat section panel. Using
an inspection mirror and flashlight, look into the flue exhaust
duct to inspect the wheel. If cleaning is required, remove motor
and wheel assembly by removing the screws holding the flue
box cover to the flue box. See Fig. 36. Remove the screws hold-
ing the inducer housing to the inlet plate. The wheel can then be
removed from the motor shaft and cleaned with a detergent or
solvent. Replace the wheel onto the motor shaft in the correct
position and reassemble the flue cover onto the flue box.
HEAT
EXCHANGER
SECTION
IGC BOARD
(HIDDEN)
MAIN BURNER
SECTION
IGC — 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 of oil at the factory.
The compressor is in a Puron® refrigerant 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 designed 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 immediately cleaned up, may cause roofing
materials to become brittle (leading to cracking) within a
year. When performing any service which may risk exposure of
compressor oil to the roof, 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 dropcloth or tarp. Make sure a 10 x 10 area around
the work area is covered.
86
COMBUSTION
FAN HOUSING
INDUCED
DRAFT
MOTOR
MAIN GAS
VALVE
a48-5089
a48-5090