Honeywell Chronotherm III User Manual page 17

AUX HT light (heat pump models
only)
This light glows whenever the
thermostat is callina for ooera-
tion of the backup fieater.'
Backup (auxiliary) heat is more
expensive to operate than the
heat pump and typically is used
only when the heat pump is
unable to handle the load.
Consult your heat pump equip-
ment literature to determine
whether this light is used and its
meaning.
Comfort temperature
The temperature you want when
you're active and occupying the
building.
temperature. The thermostat
starts the recovery period early
so the house will be at the com-
Setback
Reducing the temperature in the
house for a set period every day
in winter for energy savings. The
lower temperature is the energy
savings temperature.
S e t u p
Raising the temperature in the
house for a set period every day
in summer for energy savings.
The higher temperature is the
energy savings temperature.
Set point
The thermostat temperature set-
ting you select. The thermostat
turns the heating or cooling
equipment on and off to maintain
this temperature at the thermo-
EM HT light (beat pump models
-
This light glows whenever the
thermostat system switch is in
the EM HT~ position.
Energy-saving temperature
The lower (heating) or higher
(cooling) temperature that lets
you save on heating and cooling
costs when you're asleep or
away. Also called the setback
(heating) or setup (cooling)
temperature.
Preprogrammed schedule
This is the schedule pro-
grammed into your thermostat at
the factory. It sets a night pro-
gram that provides energy sav-
ings if you don't set your own
program, or if your personal pro-
stat location until another
temperature setting (set point)
goes into effect.
SYSTEM light
This light glows whenever the
thermostat is calling for heating
or air conditioning.
Time period
One of four program periods:
MORNING, MIDDAY, EVENING,
and NIGHT; available with the
Chronotherm Ill thermostat. One
period begins when the previous
program period ends.
MORNING-The time period
a comfortable temperature to
begin the day. This is the only
period that must contain a
time and temperature for every
day.
MIDDAY-The time period
when you can set back (win-
gram is lost for any reason. The
program, which is the same for
all days of the week, is:
Time
MORNING co0 AM
N I G H T 10.00PM 60OF
Program
The times and temperatures you
set to define the comfort and
energy savings periods for each
day's schedule.
Recovery
The time when the thermostat
operates the heating or air condi-
tioning equipment to return the
house from the energy savings
temperature to the comfort
ter) or up (summer) the
temperature for daytime
energy savings if.the building
is unoccupied.
EVENING-The time period
when you want the building at
a comfortable temperature for
evening activities after daytime
energy savings.
NIGHT-The time period
when you can set back (win-
ter) or up (summer) the
temperature for energy sav-
ings because family members
are asleep or the building is
unoccupied. Often a NIGHT
energy savings temperature is
set only for the heating sea-
son so family members can
sleep cool in summer.
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