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After refrigerant line connections are completed, it is
required that you leak check and evacuate the indoor
section and all line connections (using proper methods)
before fi nalizing the full system refrigerant charge. For
fi nal charges based on matched systems and specifi ed
line lengths, see physical and electrical specifi cations
(Table 4, page 13).
• To achieve rated capacity and effi ciency the compressor
must be exposed to refrigerant for at least 24 hours
prior to running and then the compressor must be run
for a minimum of 12 hours.
• Refrigerant charging charts (Figures 8 & 9) are
applicable only to matched assemblies of NORDYNE
equipment and listed airfl ows for the indoor coil.
S5BP outdoor units with indoor coils not listed are not
recommended and deviations from rated airfl ows or
non-listed combinations may require modifi cation to the
expansion device and refrigerant charging procedures
for proper and effi cient system operation. See pages
16 - 17.
• The refrigerant charge can be checked and adjusted
through the service ports provided external to the
outdoor unit. Use only gage line sets which have a
"Schrader" depression device present to actuate the
valve.
Charging an R410A system in AC mode at outdoor
temperatures above 55° F for optimized sub-cooling of
10° F - 12° F.
1. With the system operating at steady-state, measure
the liquid refrigerant pressure (in PSIG) at the outdoor
unit service valve.
2. Measure the liquid refrigerant temperature (in
Fahrenheit) at the service valve.
3. Determine the required liquid refrigerant pressure
from the appropriate charging chart (Figures 8 or 9).
• If the pressure measured in Step 1 is greater than
the required liquid refrigerant pressure determined in
Step 3, then there is too much charge in the system.
Remove refrigerant and repeat Steps 1 through 3
until the system is correctly charged.
• If the pressure measured in Step 1 is less than the
required liquid refrigerant pressure determined in
Step 3, there is too little charge in the system. Add
refrigerant and repeat Steps 1 through 3 until the
system is correctly charged.
AIR CONDITIONER MAINTENANCE
WARNING:
To prevent electrical shock, personal injury, or
death, disconnect all electrical power to the unit
before performing any maintenance or service.
The unit may have more than one electrical
supply.
Proper maintenance is important to achieve optimum
performance from the air conditioner. The ability to properly
perform maintenance on this equipment requires certain
mechanical skills and tools. If you do not possess these
skills, contact your dealer for maintenance. Consult your
local dealer about the availability of maintenance contracts.
Routine maintenance should include the following:
• Inspect and clean or replace air fi lters at the beginning
of each heating and cooling season, or more frequently
if required.
• Inspect the condensate drain and outdoor coil at the
beginning of each cooling season. Remove any debris.
Clean the outdoor coil and louvers as necessary using
a mild detergent and water. Rinse thoroughly with water.
• Inspect the electrical connections for tightness at the
beginning of each heating and cooling season. Service
as necessary.
CAUTION:
The unit should never be operated without a
fi lter in the return air system. Replace disposable
fi lters with the same type and size.
• Do not attempt to add additional oil to motors
unequipped with oil tubes. The compressor is
hermetically sealed at the factory and does not require
lubrication.
REPLACEMENT PARTS
Replacement parts are available through all Nordyne distributors.
Please have the complete model and serial number of the unit
when ordering replacement parts.
ELECTRICAL:
Capacitors
Compressors
Contactors
Pressure Switches
Relays
MOTORS:
Blower Motor
Fan Motor
COMPONENTS:
Blower Assembly
Cabinet Panels
Expansion Valves
Temperature Limit Switches
Thermostats
Time Delay Relays
Transformers
Fan Grille
Filter/Driers
11
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