Nordyne Outdoor Heat Pump Two Stage Split System R-410A - Manual (Page 4)

4
ABOUT THE HEAT PUMP
Your heat pump is a unique, all weather comfort-
control appliance that will heat and cool your
home year round and provide energy saving
comfort. It’s an unknown fact that heat is always
in the air, even when the outside temperature is
below freezing. The heat pump uses this basic
law of physics to provide energy saving heat
during the winter months. For example, If the
outdoor temperature is 47° F (8° C), your heat
pump can deliver approximately 3.5 units of
heat energy per each unit of electrical energy
used, as compared to a maximum of only 1
unit of heat energy produced with conventional
heating systems.
In colder temperatures, the heat pump performs
like an air conditioner run in reverse. Available
heat energy outside the home is absorbed by
the refrigerant and exhausted inside the home.
This effi cient process means you only pay for
“moving” the heat from the outdoors to the indoor
area. You do not pay to generate the heat, as
with more traditional furnace designs.
During summer, the heat pump reverses the fl ow
of the heat-absorbing refrigerant to become an
energy-effi cient, central air conditioner. Excess
heat energy inside the home is absorbed by the
refrigerant and exhausted outside the home.
OPERATING INSTRUCTIONS
Please refer to the thermostat manufacturer’s
User manual for detailed programming
instructions.
Cooling Operation Only
1. Set the thermostat’s system mode to COOL
or AUTO and change the fan mode to AUTO.
See Figure 1
2. Set the temperature selector to the desired
temperature level. The outdoor fan,
compressor, and blower motor will all cycle
on and off to maintain the indoor temperature
at the desired cooling level.
NOTE: If the temperature level is re-adjusted, or
the system mode is reset, the fan and compressor
in the outdoor unit may not start immediately. A
protective timer circuit holds the compressor
and the outdoor fan off for approximately three
minutes following a previous operation or the
interruption of the main electrical power.
Heating Operation Only
1. Set the thermostat’s system mode to HEAT
or AUTO and change the fan mode to AUTO.
See Figure 1.
2. Set the temperature selector to the desired
temperature level. The compressor, outdoor
fan, and blower motor will cycle on and off to
maintain the indoor temperature at the desired
heating level.
NOTE: If the temperature level is re-adjusted, or
the system mode is reset, the fan and compressor
in the outdoor unit may not start immediately. A
protective timer circuit holds the compressor
and the outdoor fan off for approximately three
minutes following a previous operation or the
interruption of the main electrical power.
Emergency Heat
Some thermostats may include a system mode
called EM HT or AUX HT, etc. This is a back-
up heating mode that should only be used if a
problem is suspected. With the mode set to EM
HT, etc., the compressor and outdoor fan will
be locked off and supplemental heat (electric
resistance heating) will be used as a source of
heat. Sustained use of electric resistance heat in
place of the heat pump will result in an increase
in electric utility costs.
Defrost Operation
During cold weather heating operation, the
outdoor unit will develop a coating of snow
and ice on the heat transfer coil. This is normal
USER INFORMATION
SAFETY INFORMATION
IMPORTANT: 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.
Figure 1. Digital Thermostat
Fan
Mode
Temperature
Selector
System
Mode