Nordyne Outdoor Heat Pump T3BN - Manual (Page 3)

3
TO MAINTAIN YOUR HEAT PUMP—
CAUTION:
Be certain the electrical power to
the outdoor unit and the furnace/air
handler is disconnected before
doing the following recommended
maintenance.
1. Regularly:
a. 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. Inspect the
fi lter monthly.
b. Remove any leaves and grass clippings
from the coil in the outdoor unit, being
careful not to damage the aluminum
fi ns.
c. Check for any obstruction such as twigs,
sticks, etc.
d. Certain models have external panels
fabricated from a premium grade
of steel designed to inhibit cor-
rosion. For such units, if the unit is
located in a coastal region or other area
subjected to high concentrations of salt,
then the unit should be hosed off after
storms and monthly otherwise to maintain
its new appearance.
CAUTION:
Do not over-oil, or oil motors not
factory-equipped with oil tubes. The
compressor is hermetically “sealed”
and does not require lubrication.
2. Before Calling a Service Technician, Be
Certain:
a. The unit thermostat is properly set—see
“To Operate Your Heat Pump for Cooling”
and “To Operate Your Heat Pump for
Heating.”
b. The unit disconnect fuses are in good
condition, and the electrical power to the
unit is turned on.
normal, and the unit will periodically defrost
itself. During the defrost cycle, the outdoor
fan will stop, and the compressor will continue
to run and heat the outdoor coil, causing the
snow and ice to melt. After the snow and ice
have melted, some steam may rise from the
outdoor unit as the warm coil causes some
melted frost to evaporate.
TO OPERATE YOUR HEAT PUMP
FOR AUTOMATIC COOLING AND
HEATING—
1. Set the thermostat system switch to AUTO
and the thermostat fan switch to AUTO. (See
Figure 1)
Note: Thermostats will vary. Some models
will not include the AUTO mode, and others
will have the AUTO in place of the HEAT and
COOL, and some will include all three.
2. Set the thermostat temperature to the
desired heating and cooling temperature
level(s). The outdoor unit and the indoor
blower will then cycle on and off in either
the heating or cooling mode of operation as
required to automatically maintain the indoor
temperature within the desired limits.
TO SHUT OFF YOUR HEAT
PUMP—
Set the thermostat system switch to OFF and the
thermostat fan switch to AUTO. (See Figure 1)
The system will not operate, regardless of the
thermostat temperature selector(s) setting.
TO OPERATE THE INDOOR
BLOWER CONTINUOUSLY—
Set the thermostat fan switch to ON (See Figure
1). The indoor blower will start immediately, and
will run continually until the fan switch is reset
to AUTO.
The continuous indoor blower operation can be
obtained with the thermostat system switch set
in any position, including OFF.
The continuous indoor blower operation is
typically used to circulate the indoor air to
equalize a temperature unbalance due to a sun
load, cooking, or fi replace operation.