Bryant 589A - Manual (Page 47)

IX. CONDENSER COIL, EVAPORATOR COIL, AND
CONDENSATE DRAIN PAN
Inspect the condenser coil, evaporator coil, and condensate
drain pan at least once each year. Proper inspection and clean-
ing requires the removal of the unit top. See Unit Top Re-
moval section on page 45.
The coils are easily cleaned when dry; therefore, inspect and
clean the coils either before or after each cooling season. Re-
move all obstructions, including weeds and shrubs, that in-
terfere with the airflow through the condenser coil. Straighten
bent fins with a fin comb. If coated with dirt or lint, clean the
coils with a vacuum cleaner, using the soft brush attach-
ment. Be careful not to bend the fins. If coated with oil or
grease, clean the coils with a mild detergent-and-water solu-
tion. Rinse coils with clear water, using a garden hose. Be
careful not to splash water on motors, insulation, wiring, or
air filter(s). For best results, spray condenser coil fins from
inside to outside the unit. On units with an outer and inner
condenser coil, be sure to clean between the coils. Be sure to
flush all dirt and debris from the unit base.
Inspect the drain pan and condensate drain line when in-
specting the coils. Clean the drain pan and condensate drain
by removing all foreign matter from the pan. Flush the pan
and drain tube with clear water. Do not splash water on the
insulation, motor, wiring, or air filter(s). If the drain tube is
restricted, clear it with a ‘‘plumbers snake’’ or similar probe
device. Ensure that the auxiliary drain port above the drain
tube is also clear.
X. CONDENSER FAN
CAUTION: Keep the condenser fan free from all ob-
structions to ensure proper cooling operation. Never place
articles on top of the unit. Damage to unit may result.
1. Remove 2 screws at bottom and 2 screws along sides of
condenser air intake grille and remove plastic grille.
2. Inspect the fan blades for cracks or bends.
3. If fan needs to be removed, loosen the setscrew and slide
the fan off the motor shaft.
4. When replacing fan blade, position blade so that lead-
ing edge is 1 ⁄
2
in. in front of fan orifice. See Fig. 23.
5. Ensure that setscrew engages the flat area on the mo-
tor shaft when tightening.
6. Replace grille.
XI. ELECTRICAL CONTROLS AND WIRING
Inspect and check the electrical controls and wiring annu-
ally. Be sure to turn off the gas supply, and then the electrical
power to the unit.
Remove the control, blower, and compressor compartment ac-
cess panels to locate all the electrical controls and wiring. Check
all electrical connections for tightness. Tighten all screw con-
nections. If any smoky or burned connections are noticed, dis-
assemble the connection, clean all the parts, restrip the wire
end and reassemble the connection properly and securely.
After inspecting the electrical controls and wiring, replace all
the panels. Start the unit, and observe at least one complete
heating cycle and one complete cooling cycle to ensure proper
operation. If discrepancies are observed in either or both op-
erating cycles, or if a suspected malfunction has occurred, check
each electrical component with the proper electrical instru-
mentation. Refer to the unit wiring label when making these
checkouts.
NOTE: Refer to the heating and/or cooling sequence of op-
eration in this publication as an aid in determining proper
control operation.
XII. REFRIGERANT CIRCUIT
Inspect all refrigerant tubing connections and the unit base
for oil accumulations annually. Detecting oil generally indi-
cates a refrigerant leak.
If oil is detected or if low cooling performance is suspected,
leak-test all refrigerant tubing using an electronic leak-
detector, halide torch, or liquid-soap solution. If a refrigerant
leak is detected, refer to Check for Refrigerant Leaks section
on page 23.
If no refrigerant leaks are found and low cooling perfor-
mance is suspected, refer to Checking and Adjusting Refrig-
erant Charge section on page 35.
XIII. GAS INPUT
The gas input does not require checking unless improper heat-
ing performance is suspected. If a problem exists, refer to
Start-Up section on page 23.
XIV. EVAPORATOR AIRFLOW
The heating and/or cooling airflow does not require checking
unless improper performance is suspected. If a problem ex-
ists, be sure that all supply- and return-air grilles are open
and free from obstructions, and that the air filter is clean. When
necessary, refer to Indoor Airflow and Airflow Adjustments
section on page 35 to check the system airflow.
XV. METERING DEVICE — ACUTROL™ DEVICE
This metering device is a fixed orifice and is located in the
header to the evaporator coil.
XVI. LIQUID LINE STRAINER
The liquid line strainer (to protect metering device) is made
of wire mesh and located in the liquid line on the inlet side of
the metering device.
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