HEAT/COOL SET POINTS (DESIRED TEMPERATURES)
A minimum difference of 2 ° (default) is enforced between
heating and cooling desired temperatures. This is done by
allowing one setting to "push" the other to maintain this
difference. This difference is adjustable via the Install/Service
menu under Thermostat Setup.
AUTO CHANGEOVER
When Auto mode is enabled (factory default) a change from heat
to cool (or vice versa) will not occur until an opposite mode
demand has existed for 30 minutes. If the set point is changed, the
30-minute requirement is defeated. This Auto Changeover time
is adjustable via the Install/Service menu under Thermostat
Setup. Range = 5 - 120 min.
SMART RECOVERY
With Smart Recovery selected (factory default), transition out of
setback begins 1.5 hours before selected recovery time and
gradually adjusts room temperature so desired temperature will be
achieved at selected recovery time. It operates in both heating and
cooling. This only applies to programmable operation.
For example: Set back temperature in heating is 64" F. Smart
Recovery set point is 70 ° F at 7:00 a.m. At 5:30 a.m, the control
calculates the required temperature recovery rate (recovery temp -
set back temp or current temp if greater) / 90 minutes. If the
current temp at 5:30 = 66 ° F, the recovery rate = (70 - 66)°F/90
minutes = 0.04 degrees per minute. In order to achieve set point,
the control ramps up the set point 0.04 °F / minute from 5:30
a.m. until 7:00 a.m.
NOTE: Temperatures should not be set back so far that the
equipment cannot recover in 90 minutes.
MEDIA FILTER
If MEDIA or MEDIA+EAC is installed in the indoor unit. the
system will perform a static pressure check of the system every 24
hours at 1:00 p.m. to monitor filter accumulation (TrueSense _
Dirty Filter Detection) or whenever power is applied to the
system or the system is transitioned from Off to Cool or Heat
modes. The blower will run at a medium airflow for one minute.
This system operates by setting a base line static pressure based
on the highest airflow the system could mn (this could be heat or
cool airflow.) The measurenmnt is taken at a low airflow and
then calculated up to the highest airflow the system could see.
FROZEN (;OIL DETECTION
During cooling operation, the user interface will monitor the
static pressure of the system. If the static pressure is increasing
dramatically, the user interface will turn off cooling for up to one
hour. record fault in the "Last 10 Events" screen, and run the fan
at a reduced airflow. The user interface will continue to monitor
the static pressure. If it is reduced before one hour has elapsed, it
will resume cooling operation. After one hour, cooling will be
resumed.
DEHUMIDIFY OPERATION
Once a target cooling humidity set point is selected in the
Advanced Setup COOLING HUMIDITY screen, two other setup
options affect Dehumidify operation: AC AIRFLOW and
DEHUMIDIFY.
AC AIRFLOW: This setting is located in the Furnace or Fan
Coil Setup screens and must be set to COMFORT to enable
dehumidify operation. If set to EFFICIENCY or MAXIMUM,
no special dehumidify operation will take place. Cooling will
only operate to satisfy the space temperature set point.
DEHUMIDIFY: Located in the Cooling Humidity screen of the
Advanced Setup, this option has 2 settings: ON and OFF.
If DEHUMIDIFY is set to ON (factory default), and the AC
Airflow is set to COMFORT, then the cooling unit will be
allowed to overcool the space up to 3 ° if the humidity level is
above the cooling humidity target set point.
The amount of overcooling allowed varies with the
dehumidification demand, the cooling demand, and the actual
space temperature. More overcooling is allowed with greater
dehumidification demand.
When the space temperature is at or above 75 ° and the
dehumidify demand is high, overcooling up to 3 ° is allowed.
As the space temperature approaches 70 °, less overcooling is
allowed. At 70 " space temperature, no more overcooling is
allowed no matter how great the dehumidify demand. This is
done to protect the equipment.
If DEHUMIDIFY is set to OFF and AC Airflow is set to
COMFORT, normal dehumidification mode is enabled. For
normal dehumidification, no overcooling is allowed when the
cooling humidity is above the target set point, but airflow will be
reduced during a normal cooling mode to reduce humidity. The
airflow depends on the amount of dehumidify demand. If AC
Airflow is set to EFFICIENCY or MAXIMUM, all
dehumidification functions are defeated.
DUAL FUEL SETUP / OPERATION
FURNACE LOCKOUT -- (in FURNACE SETUP menu) is
the outside temperature above which the furnace will not run
(otherwise known as the aux heat lockout).
HEAT PUMP LOCKOUT -- (in HEAT PUMP SETUP) is the
outside temperature below which the heat pump will not run
(otherwise known as the balance point).
These values can be set identical to each other. If they are not
identical, the system will stage up and down normally from heat
pump to furnace when the outside temperature is between these
lockout settings. The user interface will not allow the furnace
lockout setting to be above the heat pump lockout setting.
The factory default settings for both of these is NONE (no
lockouts). Even though a furnace lockout temperature may be set,
the system will still use the furnace in defrost operation, and will
complete the heating cycle using the furnace after a defrost has
finished.
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