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OPERATING YOUR HEAT PUMP
The operaion of your heat pump system is controlled by the
indoor thermostat. You simply adjust the thermostat and it
maintains the indoor temperature at the level you select. Most
thermostats for heat pump systems have three controls: a tem-
perature control selector, a FAN control, and a SYSTEM or
MODE control.
The temperature control selector is a dial, level, or set of but-
tons that allows you to establish the temperature that you wish
to maintain I\_r your personal coml\_rt. Some thermostats have
two temperature control selectors: one l\w setting the temper-
ature desired during cooling operation, and one l\_r setting the
temperature desired during heating operation.
The FAN control offers 2options for controlling the blower: AUTO
and ON. When set to AUTO, the blower runs only when the heat
pump is operating. When set to ON position, the blower l-uns
continuously.
Typically, the SYSTEM or MODE control on your thermostat
offers the Ik_llowing selections: COOL, OFE HEAT, AUTO,
and EMERGENCY HEAT. Some thermostats may have a sep-
arate switch I\wEMERGENCY 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 provide cooling when the indoor temperature rises
above the level 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 I\mnd on some thermostats provides l\w
automatic changeover between cooling and heating. With the
SYSTEM or MODE control set to AUTO, cooling operation is
activated when the indoor temperature rises above the thermo-
stat cooling temperature setting, or heating operation is acti-
vated when the indoor temperature drops below the thermostat
heating setting.
Depending on your typical winter heating needs, your home
comt\wt system may include a supplementary heating source.
The EMERGENCY HEAT setting (EHEAT) provides for con-
venient selection between the two heating appliances. Your
heat pump will operate when the SYSTEM or MODE control
is set to HEAT. With the SYSTEM or MODE control set to
EHEAT. the heat pump will turn off and the supplementary
heat source will be activated.
FOR 2-SPEED UNIT INSTALLATIONS: Your heat pump
system has several special features built in to protect the unit.
• 5-MINUTE TIME DELAY--Unit will delay operation
upon initial start-up or short-cycling of the indoor thermostat.
• l-MINUTE TIME DELAY--When changing speeds
from low to high, or high to low, there is a l-minute time
delay. During the speed change delay, the outdoor fan will
continue to run.
• l-MINUTE HIGH-SPEED MINIMUM--If the unit has
not operated within the past 12 hours or has a power inter-
ruption, upon the next cooling demand, it will operate l\_ra
minimum of 1minute on high speed.
In certain geographic areas and in certain applications, sup-
plemental heat is not required. Any questions regarding your
application should be directed to your dealel:
Your thermostat may be PROGRAMMABLE or NON-
PROGRAMMABLE. A NON-PROGRAMMABLE thermo-
stat (See Fig. 2.) does not allow the temperature settings to be
varied throughout the day or week without physically changing
the settings. A PROGRAMMABLE thermostat (See Fig. 3.)
allows various daily temperature changes to be preset. During
the winter, I\wexample, you may wish to "set back" the tem-
perature 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 progralmning can
result in energy savings on your home's heating and cooling.
If you wish to program your accessory electronic indoor ther-
mostat, please refer to thermostat Owner's Manual.
COOLING MODE
Wheu operatiug ill CooIiug mode, your heat pump will nlu ill
cooling mode until the indoor temperature is lowered to the
level you have selected. On extremely hot days, your heat
pump will run I\_rlonger periods at a time and have shorter off
periods than on moderate days.
FOR 2-SPEED UNIT INSTALLATIONS: Your heat pump
spends about 80% of its time operation in low-speed cool-
ing. This means that it will operate I\wlonger periods of time
than a single-speed heat pump even on moderate days. This
longer operational time in low speed results in higher effi-
ciency operation, lower operating noise, and better humidity
control than a single-speed heat pump could achieve.
The l\_llowing are typical conditions that add extra heat and/or
humidity to your home. Your heat pump will work longer to
keep your home coml\_rtable under these conditions:
• 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 electric lights are in use
• Drapes are open on the sunny side of the home
HEATING MODE
With the SYSTEM or MODE coutrol of your iudoor thermo-
stat set to HEAT, your heat pump will run in heating mode until
room temperature is raised to the level you have selected. Of
course, your heat pump will have to operate l\_rlonger periods
to maintain a coml\_rtable environment on cooler days and
nights than on moderate ones.
FOR 2-SPEED UNIT INSTALLATIONS:Your heat pump
spends about 80% of its time operating in low-speed heat-
ing. This means that it will operate l\w 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 sin-
gle-speed heat pump could achieve.
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