User's Information; Safety Information; System Maintenance; Troubleshooting - Nordyne S3BM-120G User's Information And Installation Instructions Manual

SAFETY INFORMATION

Safety markings are used frequently throughout this
manual to designate a degree or level of seriousness and
should not be ignored. WARNING indicates a potentially
hazardous situation that if not avoided, could result in
personal injury or death. CAUTION indicates a potentially
hazardous situation that if not avoided, may result in minor
or moderate injury or property damage.
OPERATING INSTRUCTIONS
Cooling Operation
1. Set the thermostat system switch (Figure 1) to COOL
or AUTO and the thermostat fan switch to AUTO.
2. Set the thermostat temperature selector to the desired
temperature level. The outdoor fan(s), compressor(s),
and blower motor(s) will all cycle on and off to maintain
the indoor temperature at the desired cooling level.
Heating Operation
1. Set the thermostat system switch (Figure 1) to HEAT
or AUTO and the thermostat fan switch to AUTO.
2. Set the thermostat temperature selector to the desired
temperature level. The furnace/air handler blower
motor(s) will cycle on and off to maintain the indoor
temperature at the desired heating level.
Fan Mode
Fan Mode is typically used to circulate the indoor air to
equalize a temperature imbalance due to a solar load,
cooking, or fi replace operation. The continuous indoor
blower operation can be obtained with the system switch
set in any position, including OFF.
Set the thermostat's fan switch to ON. The indoor blower
will start immediately, and run continuously until the fan
switch is reset to AUTO.
Thermometer
Fan Switch
Figure 1. Typical Thermostat

USER'S INFORMATION

Temperature
Selector
System Switch
System Shutdown
Set the thermostat system switch (See Figure 1) to OFF
and the thermostat fan switch to AUTO. NOTE: The
system will not operate, regardless of the temperature
selector setting.

SYSTEM MAINTENANCE

CAUTION:
Shut off all electrical power to the unit before
performing any maintenance or service on the
system. Failure to comply may result in personal
injury or death.
Proper maintenance is most important to achieve the best
performance from the appliance and should be performed
by a qualifi ed service technician at least once a year.
Follow the maintenance schedule and the instructions
below for years of safe, trouble free operation.
Regular Cleaning
• Clean or replace the indoor air fi lter at the start of each
heating and cooling season, and when an accumulation
of dust and dirt is visible on the air fi lter.
• Remove any leaves and grass clippings from the coil
in the outdoor unit, being careful not to damage the
aluminum fi ns.
• Check for obstructions, such as twigs, sticks, etc.
Motor Lubrication
CAUTION:
Do not over-fi ll or oil a motor that is not factory
equipped with oil tubes. The compressor in
this unit is factory sealed and does not require
lubrication.
If the furnace/air handler blower motor(s) and the outdoor
unit fan motor(s) have oil tubes at the motor bearings,
apply 10 drops of SAE No. 20 motor oil to each oil tube
before each cooling season.

TROUBLESHOOTING

If the unit fails to operate, check the following:
• The thermostat is properly set. See Cooling Operation
for air conditioning or Heating Operation for furnace or
air handler.
• The unit disconnect fuses are in good condition and
the electrical power to the unit is turned on.
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