ACONT900AC43UA
Pub. No. 11-HD04D1-2
69-2080—05
20
Defrost Heater Balance Point Control
When an outdoor temperature sensor has been
discovered/ enabled, a separate outdoor temperature
turn-on threshold can be set for each installed heater
stage during defrost in Installer Setup Numbers 0361 -
0363. If the balance point for a particular heater stage is
disabled, that heater stage will be used during every
defrost cycle independent of the outdoor temperature.
NOTE: NOTE: If the outdoor sensor is no longer report-
ing, all available heater stages will be used dur-
ing defrost.
When an outdoor temperature sensor has not been
discovered/enabled, the stage or combination of stages to
be used during defrost can be set in Installer Setup
Number 0364.
Operation in Emergency Heat Mode
When the Comfort Control is placed in Emergency Heat
mode, the compressor and auxiliary lockout features are
turned off. In the Emergency Heat mode, the compressor
is locked out and only the auxiliary heat operates. The
Comfort Control is capable of controlling up to a maximum
of three Emergency Heat stages.
Heat Pump with Fossil Fuel Heat (Dual Fuel) and
Outdoor Temperature Sensor
In this operation, there is no external fossil fuel kit (dual
fuel kit) installed; the Comfort Control controls this
function. During the transition between Furnace and heat
pump operation, there is a minimum Comfort Control time
delay of 45 seconds between the Furnace turning off and
the heat pump turning on and 0 seconds between the
heat pump turning off and the Furnace turning on.
NOTE: If the outdoor is missing or no longer reporting,
the control algorithm will revert back to a fossil
fuel only application.
For non-communicating equipment, configure the Comfort
Control by:
1.
Choose
Heat Pump Application
in Installer Setup
Number 0172.
2.
Choose
Fossil Fuel Option
as the backup heat
source in Installer Setup Number 0200.
3. Outdoor Temperature Sensor for Control Option
is automatically chosen in Installer Setup Number
0342.
4.
Choose appropriate
Dual Fuel Heat Pump Control
in Installer Setup Number 0345.
NOTE: If the heat pump fails to maintain heat while the
outdoor temperature is above the auxiliary lock-
out temperature, the Furnace will be used until
the setpoint is reached, at which time heat pump
operation will resume.
5.
Choose appropriate
Compressor Lockout Tem-
perature
in Installer Setup Number 0350.
6.
If heat pump auxiliary lockout was selected in
Installer Setup Number 0345, choose appropriate
Heat Pump Auxiliary Lockout Temperature
in
Installer Setup Number 0360.
7.
Choose appropriate
Defrost Balance Point Tem-
peratures
in Installer Setup Numbers 0361 - 0363.
Heat Pump with Electric Auxiliary (Backup) Heat
and Outdoor Temperature Sensor
For non-communicating equipment, configure the Comfort
Control by:
1.
Choose
Heat Pump Application
in Installer Setup
2.
Choose Electric Option as the
Auxiliary (Backup)
Heat Source
in Installer Setup Number 0200.
3.
Choose appropriate
Outdoor Temperature Sensor
for Control Option
in Installer Setup Number 0342.
4.
If Outdoor Temperature Sensor was discovered/
enabled in Installer Setup Number 0342, choose
appropriate
Compressor Lockout Temperature
in Installer Setup Number 0350.
5.
If Outdoor Temperature Sensor was discovered/
enabled in Installer Setup Number 0342, choose
appropriate
Heat Pump Auxiliary Lockout
Temperature
in Installer Setup Number 0360.
6.
If Outdoor Temperature Sensor was discovered/
enabled in Installer Setup Number 0342, choose
appropriate
Defrost Balance Point Temperatures
in Installer Setup Numbers 0361 - 0363.
TROUBLESHOOTING GUIDE
Refer to Table 8 for troubleshooting information.
