Bryant 698A, User'S Information Manual

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4
Don’t Worry About Ice
On Your Unit
Ice or frost will tend to form on the out-
door coil during winter heating operation.
Your heat pump is designed to automati-
cally melt the ice. When in this defrost
cycle, it is normal for steam or fog to rise
from the outdoor unit. Do not be alarmed!
When Not To Use Your Unit
Do not operate your unit in cooling
mode when outdoor temperatures are
below 55°F.
Do not operate your unit in heating
mode when outdoor temperatures are
above 66°F.
OPERATING YOUR
HEAT PUMP
The operation of your heat pump system
is controlled by the indoor thermostat.
You simply adjust the thermostat to
maintain the indoor temperature at the
level you select. Most thermostats for
heat pump systems have three controls: a
temperature control selector, a FAN
control, and a SYSTEM of MODE
control. Thermostats may vary from
those shown in Fig. 2 and 3. These
thermostats have an ENERGY
SAVINGS indicator which lights up
when your 2-speed unit is operating at
maximum efficiency and a TROUBLE
indicator which lights up when the unit
requires professional service.
The temperature control selector is a
dial, lever, or set of buttons that allow
you to establish the degree of tempera-
ture that you wish to maintain for your
personal comfort. Some thermostats
possess two temperature control selec-
tors: one for setting the temperature
desired during the cooling cycle, and
one to set the heating operation temper-
ature.
The FAN control offers two options for
controlling the indoor blower: AUTO and
ON. When set to AUTO, the blower will
run only during the time the heat pump is
operating. When set to ON, the blower
will run continuously.
Typically, the SYSTEM or MODE
control on your thermostat offers the
following selections: COOL, OFF,
AUTO, HEAT, and EMERGENCY
HEAT. The heat pump will not operate
when the SYSTEM or MODE control is
set to OFF. With the SYSTEM or MODE
control set to COOL, your heat pump will
operate in its cooling mode when the
indoor temperature rises above the level
that you wish to maintain. With the
SYSTEM or MODE control set to
HEAT, your heat pump will provide
warmth whenever the indoor temperature
falls below the level that you have
selected.
The AUTO selection found on some ther-
mostats provides automatic changeover
between cooling and heating cycles. With
the SYSTEM or MODE control set to
AUTO, the cooling mode is activated
when the indoor temperature rises above
the thermostat cooling temperature
setting, or the heating mode will be
activated when the indoor temperature
drops below the thermostat setting for the
heating cycle.
Your thermostat may be PROGRAM-
MABLE or NON-PROGRAMMABLE.
A NON-PROGRAMMABLE thermo-
stat (See Fig. 2.) does not allow the tem-
perature settings to be varied throughout
the day or week without physically
changing the settings. A PROGRAM-
MABLE thermostat (See Fig. 3.) allows
various daily temperature changes to be
preset. During the winter, for example,
you may wish to “set back” the tempera-
ture of your home at night, then have the
temperature return to normal prior to
waking up. The home’s temperature can
then be lowered again during the day
when no one is at home, but again be at
peak comfort level when your family
returns home. During the summer, the
opposite changes might be programmed.
When properly used, the programming
can result in energy savings on your
home’s heating and cooling.
If you wish to program your accessory
electronic indoor thermostat, please refer
to thermostat Installation Instructions.
Depending on your typical winter heat-
ing needs, your home comfort system
may include a supplementary heating
source. The EMERGENCY HEAT
(EHEAT) setting provides for convenient
selection between the two heating appli-
ances. Your heat pump will operate when
the SYSTEM or MODE control is set to
HEAT. With the SYSTEM or MODE
control set to EMERGENCY HEAT, the
heat pump will turn off and the supple-
mentary heat source will be activated.
NOTE: Your 2-speed heat pump system
has several special features built in to pro-
tect the unit.
• 5-MINUTE TIME DELAY—Unit will
delay operation upon initial start-up or
short-cycling of the indoor thermostat.
• 1-MINUTE TIME DELAY—When
changing speeds from low to high, or high
to low, there is a 1 minute time delay. Dur-
ing the speed change delay, the outdoor
fan will continue to run.
• 2-MINUTE LOW-SPEED MINIMUM
—If the unit has not operated within the
past 30 minutes, upon the next cooling
demand, it will operate for a minimum of
2 minutes on low speed.
COOLING CYCLE
With the SYSTEM or MODE control of
your indoor thermostat set to COOL,
your heat pump will run in cooling mode
until the indoor temperature is lowered to
the level you have selected.
Your 2-speed heat pump spends about
80% of its time operating in low-speed
cooling. This means that it will operate
for longer periods of time than a single-
speed heat pump even on moderate days.
This longer operational time in low speed
results in higher efficiency operation,
lower operating noise, and better humid-
ity control than a single-speed heat pump
could achieve.
The following conditions typically add
extra heat and/or humidity to your home
and make your cooling unit work longer
to keep your home comfortable:
• Entrance doors are frequently opened
and closed
• Laundry appliances are being operated
• A shower is running
• More than the usual number of people
are present in the home
• More than the normal number of elec-
tric lights are in use
• Drapes are open on the sunny side of
the home
HEATING CYCLE
With the SYSTEM or MODE control of
your indoor thermostat set to HEAT,
your heat pump will operate in heating
mode until room temperature is raised to
the level you have selected. It may be
assisted by a supplemental heat source
if equipped. Of course, your heat pump
will have to operate for longer periods to
maintain a comfortable environment on
cooler days and nights than on moderate
ones.
Your 2-speed heat pump spends about
80% of its time operating in low-speed
heating. This means that it will operate
for longer periods of time than a single-
speed heat pump even on moderate
days. This longer operational time in
low speed results in higher efficiency
operation and lower operating noise
than a single-speed heat pump could
achieve.
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