13
Minimum Heat Pump Usage
Temperature
Under most circumstances, the iQ Drive system uses
a heat pump (if available) as the primary source of
heating because it is usually less expensive to run
than the gas furnace or electric heat. The Heat Pump
Usage Temperature limit can be adjusted so that the
heat pump will not operate below this temperature
and switches the system to the furnace or electric
heater for heat.
The system will not allow the heat
pump to operate below an outdoor temperature
of 12
°
F (-11
° C).
Some reasons for choosing to
increase this temperature above the default limit of
12
° (
F) include:
• If the cost of electricity is high compared to gas in
the area, it may be cheaper to run the furnace at
higher temperatures. Consult the local dealer or
utility for recommendations.
• Comfort levels created by the gas furnace during
cold weather may be preferred.
Backup Heat Response
The system will switch automatically from the heat
pump to the furnace (when needed) to heat the
room more quickly. If the system uses an iQ Drive
modulating furnace with a conventional heat pump,
there is some control over this response. If the “Fast”
response is selected, the furnace will take over if the
room temperature is 4
°
(
F) lower than the setpoint
after 10 minutes. “Slow” response will act after 20
minutes.
NOTE:
This option is only available when
a one or two stage heat pump is installed with an
iQ Drive furnace.
1. Select MENU on the Main Screen using the
or button.
2. Press the button.
3. Select SETTINGS using the
or
button.
4. Press the button.
5. Select OPTIONS using
the
or
button.
6. Press the button.
7. S e l e c t t h e o p t i o n
beneath BACKUP HEAT
RESPONSE using the
or
button.
8. Press the button.
9. Change the BACKUP HEAT RESPONSE to fast
or slow using the
or
buttons:
10. Press the
button to save the setting.
IMPORTANT:
Changing the Minimum Heat Pump Usage
Temperature affects when and how much the
furnace will be used instead of the heat pump
for heating. This will change the total cost of
heating your residence. In some areas, the total
cost will decrease if the temperature is chosen
correctly. However, this can only be determined
by consulting with an iQ Drive trained, licensed
dealer.
Please do not alter this setting without
fi rst obtaining proper information specifi c to
your area.
1. Select MENU on the Main Screen using the
or button.
2. Press the button.
3. Select SETTINGS using the
or
button.
4. Press the button.
5. Select OPTIONS using
the
or
button.
6. Press the button.
7. Select the option beneath
HEAT PUMP USAGE
LIMIT using the
or
button.
8. Press the button.
9. Change the HEAT PUMP USAGE LIMIT:
The
button raises the temperature and the
button lowers the temperature.
10. Press the
button to save the setting.
