Carrier Infinity SYSTXCCUID01- B Manuale Utente Scaricare il pdf (Pagina 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 dif ference 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 dif ference. 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 ME DIA 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

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Carrier Infinity SYSTXCCUID01- B Manuale Utente Pagina 14

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