Carrier Infinity SYSTXCCUID01- B - Manual (Page 14)

14
system. This name and phone number will appear to the
homeowner whenever a service reminder pop--up message is
displayed (i.e. Change Filter, etc.)
To edit:
S Use Temp +/-- button to move cursor left and right.
S Use Time +/-- button to select numbers and letters.
S Use Scroll button to move up and down between NAME and
NUMBER.
OPERATIONAL INFORMATION
Continuous Fan Operation
Pressing FAN button will scroll through the following:
S AUTO = No fan operation except during equipment operation.
S LOW = Approximately 50% of High Speed operation.
S MED = Half way between High and Low speed operation.
S HIGH = Highest of either High Heating or High Cooling CFM.
Continuous fan operation is programmable. The programming
option must be enabled in the Thermostat Setup. See the
Homeowner’s Manual for detailed instructions on programming
the fan.
Five--Minute Compressor Timeguard
This timer prevents compressor from starting unless it has been off
for at least 5 minutes. It can be defeated by simultaneously pressing
the Fan and Temp + buttons.
Emergency Heat (for heat pump applications)
To activate Emergency Heat, you must press and hold the HEAT
button for 3 seconds to activate. Repeat to deactivate.
Heat Source Selection (Hybrid or Hydronic Heat)
If user wishes to override normal operation in Hybrid Heat or
Hydronic Heat applications, press and hold the heat button for 3
seconds to select desired heat source.
Keypad Lockout
Keypad can be locked by pressing “Fan” and “Humidity/Oat”
buttons at the same time for 3 seconds. When keys are locked, a
lock symbol will appear in the upper left corner of screen. Follow
same procedure to unlock keypad.
Heat and Cool LED
The Heat and Cool LEDs will pulsate during actual equipment
operation. This can be defeated in the Advanced Setup Screens.
Equipment Cycle Timer (adjustable 4--6 cycles per
hour)
This timer prevents the start of a heating or cooling cycle until 15
(or 10) minutes after the last start of the same cycle. Its function is
to assure that the equipment is not cycled more than the selected
times per hour. This timer is adjustable from 4 to 6 cycles per hour.
This timer is defeated for one cycle when the desired temperature is
manually changed. It can also be defeated for one cycle by
simultaneously pressing the Fan and Temp + buttons.
Staging Timer
In multistage heating or cooling, this timer prevents any higher
stage from turning on until the preceding stage has been on for 10
minutes.
For furnace heating, the high stage timer is adjustable to force
longer minimum low stage run time. See Furnace Setup for details.
A demand of 5_ or more will override the staging timer and allow
higher stages to energize.
In Hybrid Heat, the staging timer is 15 minutes between heat pump
and gas furnace operation. This timer is adjustable in the Hybrid
Heat Setup menu to force longer minimum heat pump run time and
longer low stage furnace run time. A demand of 5_F or more will
override the staging timer and allow higher stages to energize.
Three--Minute Minimum On Time
In normal operation, when a stage turns on, it will remain on for a
minimum of three minutes. If the setpoint is changed, this timer is
automatically cancelled, allowing the equipment to turn off
immediately when the demand is removed.
Heat/Cool setpoints (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.
Temperature Display
The actual temperature displayed is always rounded toward the
setpoint. This is because the system is operating and measuring the
temperature in sixteenths of a degree, but displaying in whole
numbers. The system may be turned off and on within .5_ of
setpoint, but the display may not change. This is by design and
does not indicate a problem with the control.
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 setpoint 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 setpoint 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_ per minute. In order to achieve setpoint, the control ramps up
the setpoint 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 (TrueSenset
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 run (this could be heat or cool
airflow.) The measurement is taken at a low airflow and then
calculated up to the highest airflow the system could see.
Selecting MEDIA will use TrueSense filter detection. Selecting
MEDIA+EAC will use either TrueSense or the clean interval
selection, whichever happens first.
Frozen Coil 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
CCUI
D
01
--
B