506162-02
Issue 0847
Page 11 of 14
Homeowner's Information
Heat Pump Operation
Your new heat pum p has several characteristics that you
should be aware of:
!
Heat pum ps satisfy heating dem and by delivering
large am ounts of
warm
air into the living space. This
is quite different from gas-or oil-fired furnaces or an
electric furnace which deliver lower volum es of
considerably
hotter
air to heat the space.
!
Do Not be alarm ed if you notice frost on the outdoor
coil in the winter m onths. Frost develops on the
outdoor coil during the heating cycle when
tem peratures are below 45
/
F. An electronic control
activates a defrost cycle lasting 5 to 15 m inutes at
preset intervals to clear the outdoor coil of the frost.
!
During the defrost cycle, you m ay notice steam rising
from the outdoor unit. This is a norm al occurrence.
The therm ostat m ay engage auxiliary heat during the
defrost cycle to satisfy a heating dem and; however.,
the unit will run to norm al operation at the conclusion
of the defrost cycle.
In case of extended pow er outage...
If the outdoor tem perature is below 50
/
F and power to
your outdoor unit has been interrupted for 6 hours or
longer, observe the following when restoring power to your
heat pum p system .
!
Set the room therm ostat selector to the "Em ergency
Heat" setting to obtain tem porary heat for a m inim um
of 6 hours. This will allow system refrigerant
pressures and tem peratures enough tim e to return
to a stabilized condition.
!
In Em ergency Heat m ode, all heating dem and is
satisfied by auxiliary heat; heat pum p operation is
locked out. After a 6 hour "warm -up" period, the
therm ostat can then be switched to the "Heat" setting
and norm al heat pum p operation m y resum e.
!
Heat pum ps (in the cooling m ode) rem ove hum idity
from your hom e. Depending on the am ount of
m oisture in the air inside your hom e, water will trickle
from the condensate drain of the cooling coil.
Therm ostat Operation
The wall-m ounted therm ostat controls your air
conditioner. The therm ostat is available in various
configurations from different m anufacturers. The
inform ation below is typical for m ost therm ostats. Ask your
dealer for specific inform ation regarding the m odel of
therm ostat installed.
Tem perature Setting Levers
Most heat pum p therm ostats have 2 tem perature
selector levers: one for heating and one for cooling. Set
the levers or dials to the desired tem perature set points for
both heating and cooling. Avoid frequent tem perature
adjustm ent; turning the unit off and back on before
pressures equalize puts stress on the unit com pressor.
On heat pum p system s, increasing your therm ostat
setting by m ore than 2 degrees m ay cause supplem ental
heaters to turn on, reducing potential energy savings.
Fan Sw itch
In AUTO or INT (interm ittent ) m ode, the blower operates
only when the therm ostat calls for heating or cooling. This
m ode is generally preferred when hum idity control is a
priority. The ON or CONT m ode provides continuous
indoor blower operation, regardless of whether the
com pressor or auxiliary heat are operating. This m ode is
required when constant air circulation or filtering is desired.
System Sw itch
Set the system switch for heating, cooling or auto
operation. The auto m ode allows the heat pum p to
autom atically switch from heating m ode to cooling m ode to
m aintain predeterm ined com fort settings. Many heat pum p
therm ostats are also equipped with an em ergency heat
m ode which locks out heat pum p operation and provides
tem porary heat supplied by the auxiliary heat.
Indicating Light
Most heat pum p therm ostats have an am ber light which
indicates when the heat pum p is operating in the
em ergency heat m ode.
Temperature Indicator
The tem perature indicator displays the actual room
tem perature.
Fan Control
For fan control your therm ostat m ay have a Fan
Selection Switch that allows you to run the fan continuously
or cycle it autom atically with the heating or cooling system .
Switch the lever to ON for continuous operation and to
AUTO for autom atic cycling.
For m axim um com fort satisfaction and continual air
cleaning/filtering, constant fan operation is recom m ended.
ELECTRICAL SHOCK HAZARD!
Turn OFF electric power to unit before perform ing
any m aintenance or rem oving panels or doors.
FAILURE TO DO SO CO ULD RESULT IN BODILY
INJURY OR DEATH.