Fig. 22 - Condenser-Fan Adjustment
C00021
C02017
Fig. 23 - Condenser-Fan Adjustment (060 Size)
After inspecting the electrical controls and wiring, replace all the
panels. Start the unit, and observe at least one complete cooling
cycle to ensure proper operation. If discrepancies are observed in
operating cycle, or if a suspected malflmction has occurred, check
each electrical component with the proper electrical
instrumentation. Refer to the unit wiring label when making these
checkouts.
NOTE: Refer to the Sequence of Operation section, as an aid in
determining proper control operation.
Step 7 -- Refrigerant Circuit
Inspect all refrigerant tubing connections and the unit base for oil
accumulations annually. Detecting oil generally indicates a
refrigerant leak.
If oil is detected or if low cooling performance is suspected,
leak-test all refrigerant tubing using an electronic leak-detector, or
liquid-soap solution. If a refrigerant leak is detected, refer to Check
for Refrigerant Leaks section
If no refrigerant leaks are found and low cooling performance is
suspected, refer to Refrigerant Charge section.
Step 8 -- Evaporator Airflow
The cooling airflow does not require checking unless improper
performance is suspected. If a problem exists, 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 Ac[iustments section to check the system
airflow.
Step 9 -- Metering Devices
Refrigerant metering devices are fixed orifices and are located in
the inlet header to the indoor and outdoor coil.
Step 10 -- Lubrication
COMPRESSOR - The compressor is charged with the correct
amount of oil at the factory.
FAN MOTOR BEARINGS - Fan motor bearings are permanently
lubricated. No further lubrication of outdoor or indoor fan motors
is required.
Step 11 -- Liquid Line Strainer
The liquid line strainer (to protect metering device) is made of wire
mesh and is located in the liquid line on the inlet side of the
metering device.
Check valves are also located in the liquid lines near the strainers.
The Strainers are the larger of the two components.
Step 12 -- High Flow Valves
Located on the compressor hot gas and suction tubes are High
Flow Valves. Large black plastic caps distinguish these valves with
O-rings located inside the caps. These valves can not be accessed
for service in the field. Ensure the plastic caps are in place and tight
or the possibility of refrigerant leakage could occur.
TROUBLESHOOTING
Refer to the Troubleshooting Chart (Table 5) for troubleshooting
information.
START-UP CHECKLIST
Use the Start-Up Checklist at the back of this manual.
17
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