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SYSTXCCUID01– V InfinitytTM Control

Installation Instructions

Carrier Infinity Control Thermostat

NOTE: Read the entire instruction manual before starting the installation.
US Patents: Carrierr U.S. Pat No. 7,243,004, Carrierr U.S. Pat No. 7,775,452

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury or property damage. Consult a qualified installer, service agency or your distributor or branch for information or assistance. The qualified installer or agency must use factory–authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Have a fire extinguisher available. Read these instructions thoroughly and follow all warnings and cautions included in literature and attached to the unit. Consult local building codes and the current edition of the National Electrical Code (NEC) NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical Code CSA C22.1.

Recognize safety information. When you see this symbol Warning Cleaningon the unit and in instructions or manuals, be alert to the potential for personal injury. Understand the signal words DANGER, WARNING, andCAUTION. These words are used with the safety–alert symbol. DANGER identifies the most serious hazards, which will result in severe personal injury or death. WARNING signifies hazards, which could result in personal injury or death. CAUTION is used to identify unsafe practices, which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions that will result in enhanced installation, reliability, or operation.

INTRODUCTION

The Infinity System consists of several intelligent communicating components which include the Infinity Control (or User Interface), variable speed furnace or FE fan coil, 2–stage AC or HP and Infinity Packaged Products, which continually communicate with each other via a four-wire connection called the ABCD bus. Commands, operating conditions, and other data are passed continually between components over the ABCD bus. The result is a new level of comfort, versatility, and simplicity.

All Infinity furnaces or fan coils are variable–speed and multi-stage for maximum flexibility, efficiency, and comfort. They support controlled ventilation, humidification, dehumidification, and air quality control. Either an Infinity (communicating), or a standard 24VAC controlled outdoor unit may be used.

When using conventional outdoor units, the Infinity furnace or fan coil provides the 24-volt signals needed to control them. Also, the Infinity Network Interface Module (P/N SYSTXCCNIM01) allows the connection of a Carrier HRV or ERV without the need for a separate wall control.

All system components are controlled through the wall-mounted Infinity Control, which replaces the conventional thermostat and provides the homeowner with a single wall control for all features of the system.

INSTALLATION, START-UP OVERVIEW

This instruction covers the installation of the Infinity Control only. Physical installation instructions for the indoor and outdoor equipment and accessories are provided with each unit.
Setup, commissioning, operation, and troubleshooting of the Infinity System are covered only in this installation instruction. It is the guide to connecting the system components and
commissioning the system once all physical components are installed. The special screen prompts and start-up capabilities are provided in the Infinity System to simplify and automate the initial commissioning of the system.

  • Install Infinity Control according to this instruction.
  • Install indoor unit, outdoor unit, and accessories according to their instructions.
  • Wire complete system according to this instruction.
  • Setup, commission, and operating system according to this instruction to assure a smooth and trouble-free startup.

INSTALLATION

Check Equipment and Job Site
Inspect equipment. File claim with shipping company prior to installation if shipment is damaged or incomplete.
Infinity Control Location and Wiring Considerations

Warning Cleaning WARNING

ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or death.
Disconnect power before routing control wiring.

All wiring must comply with national, local, and state codes.
Infinity Control Location
The Infinity Control User Interface is the command center for the Infinity System. It should be located where it is easily accessible and visible to the adult homeowner or end-user.
For accurate temperature measurement, the following guidelines should be followed:
The Infinity Control and Room Sensors should be mounted:

  • Approximately 5–ft (1.5 m) from the floor.
  • Close to or in a frequently used room, preferably on an inside partitioning wall.
  • On a section of wall without pipes or ductwork.
    The Infinity Control and Room Sensors should NOT be mounted:
  • Close to a window, on an outside wall, or next to a door leading to the outside.
  • Exposed to direct light or heat from a lamp, sun, fireplace, or other temperature–radiating objects which could cause a false reading.
  • Close to or in direct airflow from supply registers.
  • In areas with poor air circulation, such as behind a door or in an alcove.

Remote Room Sensor Option
A Remote Room Sensor can be used with the Infinity Control to take the place of the User Interface internal temperature sensor. This allows the Infinity Control to be mounted in areas with less than optimal airflow (such as near an exterior door, window, or in a closet). The remote sensor can be wired to the terminal block connectors labeled S1 and S2 at the User Interface backplate, or the ZS1 and ZS1C connection at the Damper Control Module. In either case, the Infinity Control will automatically detect the

Remote Room Sensor and ignore its internal temperature sensor. Typically, one remote sensor is used but, multiple sensors may be used and averaged in some applications. Averaging requires a special series-parallel wiring method with a specific number of sensors. See Fig. 2. It is also important to note the humidity sensor cannot be remotely located, so do not locate the Infinity Control in an area where humidity sensing may not be accurate.

Carrier Infinity Control Thermostat - Remote Room Sensor and ignore

Wiring Considerations
Ordinary thermostat wire is recommended. Use 22 AWG or larger for normal wiring applications. Continuous wire lengths over 100 ft. should use 20 AWG or larger.
NOTE: ABCD bus wiring only requires a four-wire connection; however, it is good practice to run a thermostat cable having more than four wires in the event of a damaged or broken wire during installation.
Each communicating device in the Infinity System has a four-pin connector labeled ABCD. It is recommended that the following color code be used when wiring each device:

A — Green = Data A
B — Yellow = Data B
C — White = 24VAC (Com)
D — Red = 24VAC (Hot)

It is not mandatory that the above color code be used, but each ABCD connector in the system MUST be wired consistently.
Shielded Wire
If the thermostat wiring will be located near or in parallel with high voltage wiring, cable TV or Ethernet wiring, then shielded thermostat wire can be used to reduce or eliminate potential interference. The shield wire should be connected to the C terminal, or ground, at the indoor unit. The shield wire should NOT be connected to any terminal at the user interface. Connecting the shield to ground at both ends can cause current loops in the shield, reducing shield effectiveness.

Mounting Infinity Control

First become familiar with all plastic assembly pieces shown in Figures 3 through 10. The User Interface will snap together with the backplate.
A backplate is supplied (see Fig. 4 and 5). Attach backplate using only a small hole in the wall allowing a four wire connection to pass through. Mount the assembly to the backplate.
NOTE: Once Infinity Control is secured to wall with the backplate assembly (snapped together), care must be taken not to bend or break the interlocking tabs when removing.

Decorative Backplate
Sold separately, a thin decorative backplate (see Fig. 6 and 9) is available to hide any marks/screw holes left from the previous thermostat. This decorative backplate (or beauty ring) is used by snapping it onto the back of the mounting plate before securing the plate to the wall.

Carrier Infinity Control Thermostat - Decorative Backplate 1

Carrier Infinity Control Thermostat - Decorative Backplate 2

Warning CleaningWARNING

ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury, death or equipment damage.
Before installing, modifying, or servicing system, the main electrical disconnect switch must be in the OFF position. There may be more than 1 disconnect switch. Lockout and tag switch with a suitable warning label.

  1. Turn off all power to equipment.
  2. If an existing User Interface or control is being replaced:
    a. Remove existing control from wall.
    b. Disconnect wires from existing control.
    c. Discard or recycle old control.
    NOTE: Mercury is a hazardous waste, if existing control contains any mercury, it MUST be disposed of properly. The User Interface does not contain mercury.
  3. Select Infinity Control mounting plastic (recess mount or surface mount and decorative backplate if desired).
  4. Route wires through large hole in mounting plastic. Level rear plastic against wall (for aesthetic value only — Infinity Control need not be level to operate properly) and mark wall through two mounting holes.
  5. Drill two 3/16–in (4.8 mm) mounting holes in wall where marked.
  6. Secure mounting plastic to wall using two screws and anchors provided.
  7. Adjust length and routing of each wire to reach each wire entry on the connector backplate. Strip 1/4–in (6.4 mm) of insulation from each wire.
  8. Match and connect thermostat wires to proper terminals on User Interface backplate. See wiring diagram Fig. 11, 12, and 13.

Carrier Infinity Control Thermostat - Fig. 11 -- Universal Four--Wire

Carrier Infinity Control Thermostat - Fig. 12 -- Connection Diagram

Carrier Infinity Control Thermostat - Fig. 13 -- Connection Diagram

A — Green = Data A
B — Yellow = Data B
C — White = 24VAC (Com)
D — Red = 24VAC (Hot)

NOTE: It is not mandatory that the above color code be used, but each ABCD connection in the system MUST be wired consistently. A separate ABCD Connector comes inside packaging and should be used when connecting to furnace (or fan coil). Ensure connector is inserted properly into circuit board. (See Fig. 14.)

Carrier Infinity Control Thermostat - Fig. 14 -- Wire ABCD

Warning CleaningCAUTION

ELECTRICAL OPERATION HAZARD
Failure to follow this caution may result in equipment damage or improper operation.
Improper wiring of the ABCD connector will cause the Infinity System to operate improperly. Check to make sure all wiring is correct before proceeding with installation or turning on power.

9. Push any excess wire into the wall. Seal hole in wall to prevent any air leaks. Leaks can affect operation.
10. Attach Infinity Control to the mounting plastic by lining up the plastic guides on the back of the control with the opening on the mounting plastic and push on.
11. Perform installation of all other system equipment (i.e. dampers, humidifier, ventilator, UV lights, etc.).
12. Turn on power to equipment.

See wiring diagram, Fig. 11, which includes an indoor communicating furnace or FE fan coil, with a communicating outdoor unit. No additional OAT (outdoor air temperature) sensor is required because the Infinity Control will use the temperature sensor inside the outdoor unit.

See wiring diagram, Fig. 12, for connecting an indoor communicating furnace or FE fan coil with a 1–stage air conditioning unit (non–communicating outdoor). An Outdoor Air Temperature (OAT) sensor may be installed (but is not required) at the indoor furnace or fan coil OAT terminals. When OAT sensor is applied, the Infinity System will provide enhanced system features and benefits.

See wiring diagram, Fig. 13, for connecting an FE fan coil with a 1–stage heat pump (non–communicating outdoor unit). When OAT is applied, the Infinity System will provide enhanced system features and benefits.

In a hybrid heat installation with a non–communicating heat pump, an OAT sensor must be installed, or the heat pump with not run. NOTE: For other applications not listed, refer to the Network Interface Module (NIM) Installation Instructions.

Humidifier Connection

A 24VAC bypass or fan powered humidifier may be installed. NOTE: Do Not Use a traditional humidistat to control humidifier operation. If a humidifier is installed, let the Infinity Control operate humidifier.
Bypass Humidifiers
A bypass humidifier should be wired directly to the furnace or fan coil HUM and 24VAC COM terminals. The Infinity Control will automatically energize the HUM output during a call for humidification.

Fan Powered Humidifiers
Most fan-powered humidifiers produce internal 24VAC in order to energize upon a switch or contact closure. For this application, a 24VAC N.O. Isolation Relay (DPST) MUST be used to prevent mixing the internal humidifier power with the indoor equipment transformer. Applying 24VAC isolation relay coil to furnace or fan coil HUM and COM terminals will allow the Infinity Control to automatically energize the HUM output during a call for humidification. The N.O. relay contacts will be used to energize the humidifier. See fan-powered humidifier installation instructions for more details.

Warning Cleaning CAUTION

EQUIPMENT HAZARD
Failure to follow this caution may result in equipment damage. Do not apply 24VAC fan-powered humidifier (with internal power supply) direct to indoor unit HUM and COM terminals.

INITIAL POWER-UP

NOTE: Refer to Functional Overview (see Fig. 15) to become familiar with key function buttons such as “System On/Off,” “Fan,” “Left–Side” and “Right– Side” buttons, etc. These function buttons will be used frequently during setup.

Carrier Infinity Control Thermostat - Fig. 15 -- Functional Overview

Power-Up Sequence

This section addresses initial power-up (or commissioning) of a new Infinity Control. The User Interface will communicate and identify all Infinity components in the system. The following is a typical example for a communicating Variable–Speed Furnace /Fan Coil with a 2–stage Air Conditioner / Heat Pump (including Hybrid Heat).
The User Interface display will light up and indicate that it is now “ESTABLISHING COMMUNICATIONS WITH EQUIPMENT PLEASE WAIT”. The User Interface will automatically continue by “SEARCHING FOR EQUIPMENT”, followed by “SEARCHING FOR OUTDOOR EQUIPMENT” (see Fig. 16). Once the indoor and outdoor equipment has been found, the Installer will be asked to select Accessories. Packaged Products will be automatically identified and the Installer will be asked to select Accessories. Proceed to Selecting Accessories.

Carrier Infinity Control Thermostat - Fig. 16 -- Power Up Sequence

NOTE: If the variable–speed indoor equipment (furnace or fan coil) cannot be found, the User Interface will display “CANNOT COMMUNICATE WITH INDOOR UNIT”. This MUST be corrected before the initial power-up sequence can continue. If indoor unit is found, but outdoor unit is not found, “OUTDOOR UNIT NOT IDENTIFIED” will appear. Proceed to the next section for Outdoor Unit Identification.
Selecting Outdoor Unit
If there is no communicating outdoor unit, the screen, shown in Fig. 17, will appear. Press either Left or Right Up/Down button to select AC (air conditioner), HP (heat pump), or None (no unit installed). Press right–side button to continue to next screen. If either AC or HP has been selected as the outdoor unit type, the middle screen will appear (see Fig. 17). Press either Left or Right Up/Down button to select appropriate BTU size of outdoor unit, then press right side button to continue. If a NIM (Network Interface Module) is applied for non–communicating two-stage outdoor equipment, select 1 or 2–stage compressor operation, and press right–side button to continue.

Carrier Infinity Control Thermostat - Fig. 17 -- Selecting Outdoor Unit

NOTE: Range of outdoor unit BTU selection is limited by model number of indoor unit installed. The Infinity Control will not allow an outdoor unit size that is not supported by the installed indoor unit.
NOTE: On new system installations, the model and serial number will be recognized and displayed. On any indoor/outdoor board replacements, the equipment will be recognized but the exact model/serial number will not be displayed.
Selecting Indoor Evaporator Coil
If a furnace is installed with a variable-capacity heat pump, a screen will appear to select the installed indoor evaporator coil. This selection is used to adequately calculate refrigerant charge required while in the Heat Pump Charging screens under the Heat Pump Checkout menu. Select “other” for non–Carrier evaporators.
Selecting Electric Heater
If the equipment is a fan coil, packaged heat pump, or packaged AC and the electric heater is not self–identifying, “ELECTRIC HEATER NOT IDENTIFIED” will appear (see Fig. 18). Press either Left or Right Up/Down button to select appropriate size of electric heater installed, then press right–side button to continue. An asterisks (*) will appear next to electric heater sizes that may cause excessive airflow.

Carrier Infinity Control Thermostat - Fig. 18 -- Selecting Electric Heater

NOTE: Range of electric heaters available is limited by model number of the equipment installed. The Infinity Control will not allow an electric heater size that is not supported by the installed equipment.
Hydronic Heat Applications
The Infinity Control supports 2 types of Hydronic Heat applications:
1. Hot water coil in combination with an FE fan coil and heat pump, or hot water coil as sole heat source with an FE fan coil.
2. Non–zoned FE fan coil combined with radiant hot water heat.

In either application, a Hydronic Heat kit should be installed in place of an electric heater. See FE fan coil Product Data for accessory part number. The system will identify that Hydonic Heat has been installed during the initial commissioning process. The system will treat the hot water coil as either auxiliary heat in a heat pump application, or the sole heat source. Setup options for Hydronic Heat applications are described in the Setup section of this instruction.

Selecting Accessories

Once the indoor and outdoor equipment have been found or entered, the following screens will appear allowing the Installer to select the “AIR FILTER TYPE; HUMIDIFIER INSTALLED”; and “UV LIGHTS INSTALLED” (See Fig. 19). Use either Left or Right Up/Down button to make appropriate selections in the highlighted area on the display screen. Press right–side button to continue (or advance) to the next screen.

Carrier Infinity Control Thermostat - Fig. 19 -- Accessories —UV Lights

Air Filter Type
This accessory screen will appear first. The installer will need to enter the type of filter (AIR FILTER, ELEC. AIR CLEANER, or PURIFIER). See Table 1 and make a selection using Left or Right Up/Down button, then press right–side button to continue.

Carrier Infinity Control Thermostat - Table 1 – Filter Selection

Humidifier Installed
This will appear after the Air Filter Type screen. Select whether a humidifier is installed on the system, YES or NO, then press right–side button to continue.
UV Lights Installed
This screen will appear to select whether UV lights are installed on the system, select YES or NO, then press right–side button to continue.

Equipment Summary

The “EQUIPMENT SUMMARY” screen will appear after Accessories have been selected. This screen will give a summary of all equipment automatically found or manually selected. If a wrong selection was made, press left–side button (BACK selection) to go back to that particular screen and make changes. When everything is OK, press right–side button again to continue. (See Fig. 20.)

The “SETUP COMPLETE! SAVE ALL SELECTIONS?” screen will appear after Equipment Summary. To Save All Selections press (YES) right–side button. Pressing the left–side button (NO selection) will return to the Equipment Summary screen where changes can be performed to any of the equipment selection screens. After selecting YES, the initial power-up sequence of the new Infinity Control is complete.

Carrier Infinity Control Thermostat - Fig. 20 -- Equipment Summary

Static Pressure Check

Carrier Infinity Control Thermostat - Fig. 21 -- Static Pressure Check

This screen will appear after Setup is exited. The system will perform a static pressure check. This process will take about 1 1/2 minutes to complete. When completed, a screen will appear displaying the static pressure (in inches) across the equipment at the expected highest delivered airflow. If the blower RPM is greater than 1200, then a warning will appear, but equipment operation and the TrueSenset dirty filter detection operation will not be affected.
NOTE: The static pressure check occurs only at initial installation, or when INSTALL is run in the INSTALL/SERVICE menu.

QUICKSTART

For first time installers, Quick Start will allow a quick start up of the Infinity System before learning all the details of system operation. However, for the best possible comfort and operation refer to the Infinity Control Owner’s Manual.
Set Day, Time & Desired Humidity

  1. Open the door of the Infinity Control and press the BASIC button.
  2. Adjust the highlighted HOUR setting using the LEFT Up/Down button.
  3. Press SCROLL button (down) to highlight MINUTE.
  4. Adjust the MINUTE setting using the LEFT Up/Down button.
  5. Press SCROLL button (down) to highlight DAY.
  6. Adjust the current DAY setting using the LEFT Up/Down button.
  7. Press SCROLL button (down) to highlight HUMIDITY.
  8. Press the red HEAT button to select heating humidity.
  9. Adjust desired heating humidity level using either (+/–) button.
  10. Press the blue COOL button to select cooling humidity.
  11. Adjust the desired cooling humidity level using either(+/–)button.
  12. To exit press BASIC button or close door.
  13. If changes are made, you will be asked to “SAVE CHANGES? YES/NO.”

Override Heating Schedule

  1. Press the red HEAT button. Heating mode is confirmed when the red LED next to the red HEAT button is lit.
  2. Use the RIGHT Up/Down button to select your desired heating temperature.
  3. The default time for temporarily overriding the temperature schedule is 2:00 HRS as indicated by the text on the lower left.
    NOTE: Override time will not appear if programming has been turned off.
  4. You can change the temporary override time in 15–minute increments by pressing the LEFT Up/Down button until the desired override time is selected, or press the HOLD button anytime to override the schedule indefinitely.

Quick Program Schedule For All Days
This section will give you a quick program schedule for ALL DAYS of the week. For more information on how to create customized schedules for every day, the entire week, or weekend, refer to the Owner’s Manual.

  1. Open the door of the control.
  2. Press the SCHEDULE button, which allows you to create one schedule for the entire home.
  3. Press either the LEFT or RIGHT side button repeatedly (if necessary) until “ALLDAYS” is displayed. The WA K E time period will be highlighted.
  4. Using the LEFT Up/Down button, set the start time for this time period.
  5. Press the red HEAT button. Heating temperature will begin flashing.
  6. Set the heating temperature using the RIGHT Up/Down button.
  7. Press the blue COOL button. Cooling temperature will begin flashing.
  8. Set the cooling temperature using the RIGHT Up/Down button.
  9. Set the remaining periods by using the SCROLL button to select “DAY”, “EVENING”, and “SLEEP”.
  10. Exit the scheduling mode by either closing the door or pressing the SCHEDULE button.
  11. If changes are made, you will be asked to “SAVE CHANGES YES/NO.”

INSTALL / SERVICE MENUS

The “INSTALL / SERVICE” menus contain a set of vital information. This information enables the Installer or Service person to view a summary of what has been installed, etc. This information is not covered in the Owner’s Manual.
To enter INSTALL / SERVICE menus, press and hold the ADVANCED button for at least ten seconds. The following menu will appear (See Fig. 22):

Carrier Infinity Control Thermostat - Fig. 22 -- Install

NOTE: The INSTALL / SERVICE menu will automatically exit after 60 minutes of no push-button activity.
EQUIPMENT SUMMARY: Shows all equipment recognized by and attached to the system.
INSTALL: Used when adding, changing out, or uninstalling equipment.
SETUP: Used to view or modify equipment settings.
CHECKOUT: Allows testing of equipment operation
SERVICE: Used to view operation and fault history of equipment and enter dealer name/phone number for display

EQUIPMENT SUMMARY MENU

This screen shows indoor unit type and model number, outdoor unit type (and model number if a 2–stage unit), filter type and any accessories that are installed are recognized. See Fig. 23.

Carrier Infinity Control Thermostat - Fig. 23 -- Equipment Summary

INSTALL MENU

This menu item will perform a start-up process in order to learn all equipment in system. Press right side button to initiate the process. See Fig. 24.

Carrier Infinity Control Thermostat - Fig. 24 -- Install Menu

SETUP MENU

This menu has several layers, allowing modification of equipment settings. No settings will need to be made at equipment (i.e. DIP switches on a furnace). All configuration settings made effective from this menu will override equipment configuration made by dip switches. Fig. 25 shows all the information that can be found in the SETUP menu.

Carrier Infinity Control Thermostat - Fig. 25 -- Setup Menu

Setup — Thermostat

Auto Mode Setup:

  • Enable/Disable Auto Changeover mode (default = Enable).
  • Auto Changeover Time may be adjusted 5 to 120 minutes, (default = 30 minutes).

When Auto mode is enabled (factory default) a change from heat to cool (or vice versa) will not occur until the current cycle is satisfied and an opposite mode demand has existed for 30 minutes.
If the setpoint is changed, the 30-minute timer is deleted.
Heat/Cool Deadband:

  • 0to6_F(0to3_C), (default = 2_F)

The minimum difference enforced between heating and cooling desired temperatures. This can allow one setting to “push” the other to maintain this difference.
Offsets:
This option allows calibration (or deliberate miscalibration) of the temperature and humidity sensors. These offsets are added to the actual temperature/humidity values (default = 0).

  • Temperature Offset: –5_Fto+5_F(–3_Cto+3_C)
  • Outside Temp Offset: –5_Fto+5_F(–3_Cto+3_C)
  • Humidity Offset: –10 to +10%

Elevation:
0 to 10,000 feet. This value is used to correct the static pressure readings the system performs.
Cycles Per Hour:

  • Maximum cycles per hour = 4 (default) or 6.

Programming:

  • ON (default)– allows program schedule to be set by user.
  • OFF — system becomes non–programmable
  • Periods Per Day = 2 or 4 (default = 4)
  • Programmable Fan On/Off (default = Off). If ON is selected, fan can be set to Auto, Low, Med, or High.

Smart Recovery:

  • On or Off (default = On)

Applies to programmable operation only. Will start recovery 90 minutes prior to schedule change in both heating and cooling mode. Refer to operational information for more detail.
English/Metric Display:

  • For_C, (default = _F)

Reset Factory Defaults:
Program Schedule:

  • Yes/No to reset back to Energy Star default Time and Temp schedules.

User Settings:

  • Yes/No to reset the user settings in the Advanced Setup to factory default settings.

Install Settings:

  • Yes/No to reset install settings in Install/Service menus to factory default settings.

Last 10 System Events:

  • Yes/No to reset last 10 events under Service Info menu.

Setup — Furnace
Upon a first time start–up of the Infinity Control, the furnace DIP switch settings will be copied to the furnace setup menu. Any changes can then be made from the Infinity Control.
Furnace Airflow:

  • COMFORT (default)
  • EFFICIENCY

Selects the airflow of the furnace when heating. EFFICIENCY is the airflow used to meet specified ratings, COMFORT is a decreased airflow used to increase the output air temperature and provide increased comfort.
Cooling Airflow:

  • COMFORT (default) — cooling airflow is varied depending on humidity and temperature demands settings. This selection enables the full dehumidify and comfort capabilities of the system. When COMFORT is not selected, the unit will not run reduced airflows for dehumidification.
  • EFF 325 — fixed airflow used to achieve specified ratings — no dehumidification airflow reduction. This is nominally 325 CFM/ton, but will vary if a 2–stage outdoor unit is used.
  • EFF 350 — fixed airflow used to achieve specified ratings — no dehumidification airflow reduction. This is nominally 350 CFM/ton, but will vary if a 2–stage outdoor unit is used.
  • MAXIMUM — 400 CFM/ton. No dehumidification airflow reduction.
  • QUIET– minimum cooling airflow that the system can safely run (typically 300 CFM/ton). Use this setting if duct noise is a severe problem. Note that duct sweating in high humidity environments could be an issue.

Heat Pump Heating:

  • COMFORT (default) Heat Pump airflow is varied depending on outdoor temperature to maximize comfort.
  • EFF 325 — Fixed airflow used to achieve specified ratings . This is nominally 325 CFM/ton, but will vary if a 2–stage outdoor unit is used.
  • EFF 350 — Fixed airflow used to achieve specified ratings . This is nominally 350 CFM/ton, but will vary if a 2–stage outdoor unit is used.
  • MAXIMUM — 400 CFM/ton.

Heat Pump Cooling:

  • COMFORT (default) — cooling airflow is varied depending on humidity and temperature demands settings. This selection enables the full dehumidify and comfort capabilities of the system. When COMFORT is not selected, the unit will not run reduced airflows for dehumidification.
  • EFF 325 — fixed airflow used to achieve specified ratings — no dehumidification airflow reduction. This is nominally 325 CFM/ton, but will vary if a 2–stage outdoor unit is used.
  • EFF 350 — fixed airflow used to achieve specified ratings — no dehumidification airflow reduction. This is nominally 350 CFM/ton, but will vary if a 2–stage outdoor unit is used.
  • MAXIMUM — 400 CFM/ton. No dehumidification airflow reduction.
  • QUIET– minimum cooling airflow that the system can safely run (typically 300 CFM/ton). Use this setting if duct noise is a severe problem. Note that duct sweating in high humidity environments could be an issue.

Dehum Airflow:

  • NORMAL (factory default) — When equipment is running to dehumidify, the airflow is allowed to adjust to a minimum to satisfy the dehumidification call.
  • HIGH — Minimum airflow during the dehumidify mode is increased to reduce duct and register sweating.

Low Heat Rise

  • ON
  • OFF (default)

Set to ON if the system contains a bypass humidifier. The ON setting will increase the furnace low heat airflow.
Staging

  • SYSTEM (default)
  • LOW
  • LOW–MED
  • LOW–HIGH
  • MEDIUM
  • MED–HIGH
  • HIGH
  • FURNACE

NOTE: Controls the staging of the furnace. More staging options will be available if furnace is capable of more stages. SYSTEM setting will allow the Infinity Control to determine furnace staging.
LOW will only run the low stage of furnace heat. LOW–MED will run the low and medium stages (2 stages of heat). MED will only run the medium stage of heat. MED–HIGH will run the medium and high stages (2 stages of heat). HIGH will only run the high stage of furnace heat.
G Terminal
This setup option selects desired operation when the R–G circuit changes state on the furnace control board depending on setup.

  • DISABLED (Default)
  • FAN — turns on fan to selected fan speed when G terminal is energized. See Fig. 26. This setting is used in conjunction with fresh air supply products (e.g. fresh air/make–up air dampers).
  • FAN SPEED — select Low, Med, High for all zones when G terminal is energized
  • SHUTDOWN — shuts off fan and equipment when initiated. This function is not intended for emergency fire shutdown. It may be activated by a dry contact from an external device such as a float switch or a relay. User Interface displays SYSTEM MALFUNCTION on screen and registers G terminal shutdown event in Last 10 System Events. See Fig. 27.

Fig. 26 -- G Input Wiring for Blower Operation

Fig. 27 -- G Input Wiring for System Shutdown

High Stage Timer
Minimum amount of time low stage must operate before high stage is activated. Ten to 60 minutes. 10 = default
A demand of 5_F(3_C) or more will override the staging timer.
Furnace Airflow (Capacity) Limiting
The following settings allow the installer to restrict the furnace within certain minimum and maximum airflows. These airflows are converted to capacities. The Min and Max limits are determined by the equipment size. These settings are not the same as the zoning airflow limits.
Min CFM (only appears with modulating furnaces)
Minimum CFM to run a modulating furnace. This will increase the minimum operating capacity of the furnace. Default value is the furnace air flow for the lowest heat capacity.
Maximum CFM (only appears with modulating furnaces)
Maximum CFM to run a modulating furnace. This will reduce the operating capacity of the furnace. Default value is the furnace air flow for the highest heat capacity.
Off Delay

  • 90 seconds
  • 120 seconds (default)
  • 150 seconds
  • 180 seconds

Amount of time the blower will continue to run after heating has shut off.
Dehum Drain
Turns off the continuous fan at the end of cooling for five minutes in order to drain the indoor coil of water. The fan will only be turned off if a dehumidify demand existed at the start of or during the cooling cycle. Default is enabled.

Altitude

  • US 0 — 2000 (default)
  • US 2001 — 3000
  • CA 2001 — 4500 (for Canada only)
  • US 3001 — 4000
  • US 4001 — 5000
  • US 5001 — 6000
  • US 6001 — 7000
  • US 7001 — 8000
  • US 8001 — 9000
  • US 9001 — 10000

This setting will adjust the furnace’s airflow to compensate for altitude. Altitude adjustment is not available with older furnaces. Please see furnace instructions for further details.

Setup -Fan Coil

Heat Pump Heating:

  • COMFORT (default) Heat Pump airflow is varied depending on outdoor temperature to maximize comfort.
  • EFF 325 — Fixed airflow used to achieve specified ratings. This is nominally 325 CFM/ton, but will vary if a 2–stage outdoor unit is used.
  • EFF 350 — Fixed airflow used to achieve specified ratings. This is nominally 350 CFM/ton, but will vary if a 2–stage outdoor unit is used.
  • MAXIMUM — 400 CFM/ton.

Heat Pump Cooling Airflow:

  • COMFORT (default) Cooling airflow is varied depending on humidity and temperature demand settings. This selection enables the full dehumidify and comfort capabilities of the system. When COMFORT is not selected, the unit will not run reduced airflows for dehumidification. Heat Pump airflow is varied depending on outdoor temperature to maximize comfort.
  • EFF 325 — fixed airflow used to achieve specified ratings – no dehumidification airflow reduction. This is nominally 325 CFM/ton, but will vary if a 2–stage outdoor unit is used.
  • EFF 350 — fixed airflow used to achieve specified ratings — no dehumidification airflow reduction. This is nominally 350 CFM/ton, but will vary if a 2–stage outdoor unit is used.
  • MAXIMUM — 400 CFM/ton. No dehumidification airflow reduction.
  • QUIET– minimum cooling airflow that the system can safely run (typically 300 CFM/ton). Use this setting if duct noise is a severe problem. Note that duct sweating in high humidity environments could be an issue.

Dehum Airflow:

  • NORMAL (factory default) — When equipment is running to dehumidify, the airflow is allowed to adjust to a minimum to satisfy the dehumidification call.
  • HIGH — Minimum airflow during the dehumidify mode is increased to reduce duct and register sweating. Also increases minimum airflow during normal cooling operation to reduce duct sweating.

Heater Size:

  • (choices dependent upon fan coil model)

This will show the heater size entered during the start–up process. This value can be changed to another value (limited by the model number of the fan coil). If the electric heater is self–identifying, this value is not shown.
Elect Heat Lockout

  • NONE (default)
  • +5 to 55_F (–15 to 13_C)

Outside temperature above which the electric heat will not operate except for defrost.
G Terminal
This setup option selects desired operation when the R–G circuit changes state on the fan coil control board depending on setup.

  • DISABLED (Default)
  • FAN — turns on fan to selected fan speed when G terminal is energized. See Fig. 26. This setting is used in conjunction with fresh air supply products (e.g. fresh air make–up air dampers).
  • FAN SPEED — select Low, Med, High for all zones when G terminal is energized
  • SHUTDOWN — shuts off fan and equipment when initiated. This function is not intended for emergency fire shutdown. It may be activated by a dry contact from an external device such as a float switch or a relay. User selects whether the contact is NC — normally closed (default) or NO — normally open. User Interface displays SYSTEM MALFUNCTION on screen and registers G terminal shutdown event in Last 10 System Events.  See Fig. 27.

Dehum Drain
Turns off the continuous fan at the end of cooling for five minutes in order to drain the indoor coil of water. The fan will only be turned off if a dehumidify demand existed at the start of or during the cooling cycle. Default is enabled.
Reheat Dehum
Enables electric heat to be used while Cool to Dehumidify is running. This will allow the Cool to Dehumidify function to run much longer, greatly improving humidity control in cooling mode. Accumulated electrical energy used while reheating (in kilowatt–hours) is shown on the Fan Coil Run Hours screen and can be reset there. This is only available with fan coil systems.

Setup — Heat Pump / AC
Cooling Lockout:

  • NONE (default)
  • 45_F(7_C)
  • 50_F(10_C)
  • 55_F(13_C)

Outside temperature below which cooling will not be provided.
Low Ambient Cooling:

  • NO (default)
  • YES

Selecting YES will enable the low ambient cooling operation in the outdoor unit. This setting is only available with communicating outdoor units and with Cooling Lockout set to NONE. Low ambient kits are not needed with communicating outdoor units. For detailed sequence of operation, see outdoor unit installation instructions.

Entered Size:

  • (dependent on indoor unit model)

Size of the outdoor unit entered during the start–up process. If the outdoor unit is a communicating model, this value will not be shown. This size can be changed here but is limited to sizes that the indoor unit can handle.
Defrost Interval:

  • 30 minutes
  • 60 minutes
  • 90 minutes
  • 120 minutes (default)
  • Auto–Defrost interval optimized by outdoor control (default for communicating HP)

Time interval at which defrost cycles can occur on a heat pump.
Lockout Temp:

  • Off (default)
  • +5 to 55_F (–15 to 18_C)

Locks out the heat pump from operating below the selected outside temperature. Appears with a fan coil only. Must be below any electric lockout temperature in Fan Coil Setup.

Quiet Shift

  • Off (default)

Turns on Quiet Shift function in 1–stage or 2–stage communicating heat pumps.
High Cool Latch:

  • NONE (default)
  • On
  • 80 to 110_F (27 to 43_C)
  • DISABLE (disable use of high cool stage)

Outside temperature above which only the high stage (of a 2–stage outdoor unit) will run when cooling.

High Heat Latch

  • OFF (default)
  • On
  • 20 to 50_F(–7to10_C) 2 –stage heat pump runs only high stage heating below a selectable outdoor temperature. Selections from20to50_F(–7to10_C) are available in 5_F(3_C) increments.
  • DISABLE (disable use of high heat stage)

Max Heat RPM (Appears with variable capacity heat pump)
Clamps the operating speed of the heat pump to this maximum. Used to reduce operating noise while in high heating capacity. Reducing this value will reduce the heating capacity of the heat pump.

Heat Pump Airflow (Capacity) Limiting
The following settings allow the installer to restrict the heat pump within certain minimum and maximum airflows. These airflows are converted to capacities. The Min and Max limits are determined by the equipment size.

Min CFM (only appears with variable capacity heat pump) Minimum CFM to run a variable capacity heat pump. This will increase the minimum operating capacity of the heat pump. Default value is the heat pump air flow for the lowest heat capacity. Maximum CFM (only appears with variable capacity heat pump) Maximum CFM to run a variable capacity heat pump This will reduce the operating capacity of the heat pump. Default value is the heat pump air flow for the highest heat capacity.

Lo Air Multiplier
Adjusts the low airflow speed on non–communicating two–stage
units. Choose 0.65 for units with a Bristol compressor, choose 0.80
(default) for units with a Copeland scroll compressor.

Setup — Hybrid HeatCarrier Infinity Control Thermostat - Fig. 28 -- Hybrid Heat Setup

FURNACE LOCKOUT — Temperature above which only the heat pump will operate, except for defrost.

  • Default = NONE
  • Available settings = NONE thru >55_F(13_C)

HEAT PUMP LOCKOUT — Temperature below which only the furnace will operate.

  • Default = NONE
  • Available settings = NONE thru <55_F(13_C)

DEFROST W/FURNACE — Choose whether furnace operates during defrost cycle.

  • Default = YES
  • Available settings = YES / NO

HP TO FURNACE STAGING TIME — Adjust the minimum amount of time the heat pump will run before furnace will be allowedtorun.

  • Default = 15 MIN
  • Available settings = 15–60 minutes. If a demand of 5_F(3_C) or greater exists, the timer will be overridden.

Setup — Hydronic Heat

Carrier Infinity Control Thermostat - Fig. 29 -- Hydronic Heat Setup

HOT WATER LOCKOUT — Outside temperature above which the hot water will not operate except for defrost (if needed).

  • Available settings — NO, 5 to 55_F (–15 to 13_C) in 1_ increments

HEAT PUMP LOCKOUT — Outside temperature below which only the hot water will run, 1_F(.6_C) resolution.

  • Appears only with a heat pump outdoor unit.
  • Available settings — NO, 5 to 55_F (–15 to 13_C) in 1_increments

DEFROST W/WATER:

  • Available settings: YES / NO (Default =YES)
  • Appears only if heat pump is available If no, hot water will not run during a defrost.

AIRFLOW — Selects desired airflow during Hydronic Heating

  • Available range from OFF, 500 CFM(minimum) to 400 CFM/ton cooling maximum in 50 CFM increments.
  •  Default is the cooling airflow. (350 CFM/ton)
  •  OFF selection does not turn off airflow if heat pump is defrosting.

BLOWER ON DELAY — Time after hot water is requested that the blower will turn on.

  • Available settings — 0 to 240 seconds in 30 second increments
  • Default is 30

BLOWER OFF DELAY– Time after hot water request terminates before the blower will turn off.

  • Available settings — 0 to 240 seconds in 30 second increments
  • Default is 0.

Setup — Accessories
Filter Type:

  • AIR FILTER (i.e. TrueSenset)
  • ELEC. AIR CLEANER
  • AIR PURIFIER (i.e. TrueSenset)

CLEAN INTERVAL: Never, 1 to 18 months. (Default = 90) Enables a timer for the filter notification.
Interval at which the Clean Filter notification will turn on.
PRESSURE MONITOR: ENABLE/DISABLE — enables the static pressure calculation for media–type filters.
Humidifier Installed:

  • NO
  • YES

If YES, indicates to the system whether a humidifier is installed and enables humidification functions.
CHANGE PAD INTERVAL: 1 to 24 months (default = 12 months)
Interval at which the Change Humidify Pad notification will be displayed.
HUMIDIFY WITH FAN: (Heating Mode Only)

  • NO (default)
  • YES

If YES, the humidifier will turn on if there is a humidify demand present. The fan will turn on to Low speed if the fan setting is Auto.
Ventilator:
NOTE: Only appears if ventilator is installed.
CLEAN INTERVAL:

  • 60 to 180 days of actual operation (default = 90)

Interval at which the Clean Ventilator Pre–filter notification will turn on.
UV Lights Installed

  • NO
  • YES

If YES, indicates to the system whether UV lights are installed.
CHANGE INTERVAL:

  • 6 to 48 months operation time (default = 12 months)

Interval at which the Change UV Lights notification will be displayed.
Setup — System Maintenance
Remind Owner of Routine Maintenance Every:
This setup is used to adjust the timer interval in which the normal System Maintenance notification is turned on for the homeowner. (See Fig. 30.)
Range =

  • OFF
  • 6 to 24 months, (default = 12 months)

Carrier Infinity Control Thermostat - Fig. 30 -- System Maintenance

Pressing the right side button will reset the timer. Pop–up confirmation will be shown.
Setup — Utility Saver
Cooling/Heat Pump Heating: (Hybrid Heat & Hydronic Heat Only)

  • Turn off, Low Stage

Utility Saver is used to force the equipment to a lower stage (low or off) when activated by the utility company, typically during peak load times.
This setup is available only if the equipment has a utility saver input (refer to outdoor equipment Installation Instructions). This setup controls the response of the equipment when the utility saver input is active.
The choices include:

  • Turn Off , (equipment turns off)
  • Low Stage (available if the AC/heat pump is a 2–stage model, runs low speed only)

CHECKOUT MENUS

The Checkout menu will show the equipment installed in the system. A sample checkout menu is shown in Fig. 31.

Carrier Infinity Control Thermostat - Fig. 31 -- Checkout Menu

Checkout — Furnace or Gas PAC
Make sure the furnace is properly installed before continuing.

  • LOW HEAT RUNTIME: 5 min.
  • HIGH HEAT RUNTIME: 5 min.

This menu item allows the furnace to be exercised. First, a low heat runtime and high heat runtime are selected. Range = 5 — 120 min.
If only the low heat is to be exercised:
The furnace will execute its ignition start–up sequence. This sequence will be displayed on the Infinity Control screen. After the gas valve and blower motor turn on, the screen will automatically change to “FURNACE CHECK” and show the current operating status of the furnace.
Checkout — Electric Heat

  • ELECTRIC HEAT RUNTIME: 5 min., Default time = 5 min., Range = 0 — 120 min.

If you have a fan coil with electric heaters, this menu item will allow the heaters to be exercised.

With self–identifying electric heaters, three stages of electric heat are available to be exercised in any combination. Non–identifying heaters will only provide one stage of heat.
Enter the run time (in minutes) of each stage of heat to be exercised then press START (right–side button). The display will change to show the fan coil’s operating status.

Checkout — Heat Pump Heating

  • HIGH HEAT RUNTIME: 5 min.
  • LOW HEAT RUNTIME: 5 min.
  • DEFROST: NO

The heat pump heating mode can be exercised with this menu option. With a 2–stage heat pump, a low heat runtime and a high heat runtime are independently selectable to exercise. A defrost cycle is also selectable. Default time = Fixed 5 min. minimum, range = 5 — 120 min.

NOTE: Airflows during Checkout modes are fixed to the Efficiency setting and are independent of other airflow settings. To view airflows for normal heat pump heating mode, exit the Checkout screen and apply a heating demand to the system.
Checkout — Heat Pump Cooling or AC Cooling

  • HIGH COOL RUNTIME: 5 min.
  • LOW COOL RUNTIME: 5 min.

The heat pump cooling mode (or AC cooling mode) can be exercised with this menu option. With a 2–stage heat pump or AC unit, a low cool runtime and a high cool runtime are independently selectable to exercise. The display will change to show the heat pump or AC operating status.

Default time = Fixed 5 min. minimum, range = 5 — 120 min.
NOTE: Airflows during Checkout modes are fixed to the Efficiency setting and are independent of other airflow settings. To view airflows for normal heat pump (or AC) cooling mode, exit the Checkout screen and apply a cooling demand to the system.

Checkout — Humidifier

  • OFF
  • ON

The humidifier can be exercised On and Off with this menu option.
Charging (Appears with Variable Capacity Heat Pump)

  • Enables charging mode of the variable capacity heat pump.

Evacuation (Appears with Variable Capacity Heat Pump)

  • Allows the heat pump to be evacuated of refrigerant.

EXV Position (Appears with Variable Capacity Heat Pump)

  • Positions the Electronic Expansion Valve (open or closed)

Charge Calculation (Appears with Variable Capacity Heat Pump)

  • Calculates the amount of charge needed in the system. Takes into account lineset length, liquid line diameter, and indoor coil model.

Checkout — Ventilator
Speed:

  • OFF
  • LOW
  • HIGH

The ventilator can be exercised through all of its operating speeds with this menu option.

Checkout — System Access Module (SAM)
See System Access Module Installation Instructions for full details.
SERVICE MENUS
The Service Info menu will only show the equipment installed in the system. Below is a sample using a furnace and a heat pump (Hybrid Heat). A sample service menu is shown in Fig. 32.

Fig. 32 -- Service Info Menu

Service — Furnace Status or Gas PAC Status
The Status screens will show all of the current operating parameters of each installed piece of equipment.
NOTE: To view a less detailed Equipment Status screen, press the right side button. This will display equipment stage, fan status, actual and target humidify settings.
Heat Stage:

  • OFF, LOW, HIGH

Displays stage of heat that the furnace is currently delivering.
Airflow CFM:

  • (furnace model dependent)

Cubic Feet per Minute of air the blower is currently delivering.
Inducer RPM (90% furnaces only):

  • Inducer motor RPM value.

Blower RPM:

  • Actual RPM feedback from indoor blower motor.

Static Press:

  • Inches of water. Displays the calculated static pressure that the fan coil is currently experiencing.
  • If static pressure cannot be accurately calculated, the display will read UNKNOWN. When this is seen, the system is adjusting to high static pressure by cutting back blower RPM.

Lockout Timer:

  • Seconds

If a lockout timer is active, this will show the current time value.
See furnace manual for details on lockout timers.
Service — Fan Coil Status
Electric Heat:

  • OFF, LOW, MED, HIGH

Displays stages of electric heat that the fan coil is currently delivering.
Airflow CFM:

  • (fan coil model number dependent)

Cubic Feet per Minute of air the User Interface is currently requesting.
Blower RPM:

  • Actual blower motor RPM value

Static Press:

  • Inches of water. Displays the calculated static pressure that the fan coil is currently experiencing.
  • If static pressure cannot be accurately calculated, the display will read UNKNOWN. When this is seen, the system is adjusting to high static pressure by cutting back blower RPM.

Service — Heat Pump / AC Status
Stage: (Heat / Cool)

  • OFF, LOW, HIGH

Displays stage of heating or cooling that the Heat Pump/AC is delivering.
Defrost:

  • NO, YES

Displays status of defrost mode if heat pump.
Airflow CFM:

  • Airflow User Interface is requesting from blower.

Outdoor Coil Temp:

  • F or_C (default = _F)

The temperature of the outdoor unit coil (only available on 2–stage communicating outdoor units).
Blower RPM:

  • Actual RPM feedback from indoor blower motor.

Static Press:

  • Inches of water. Displays the calculated static pressure that the fan coil is currently experiencing.
  • If static pressure cannot be accurately calculated, the display will read UNKNOWN. When this is seen, the system is adjusting to high static pressure by cutting back blower RPM.

Service — Last 10 System Events

Carrier Infinity Control Thermostat - Fig. 33 -- Last 10 System Events

This screen will show last 10 events that occurred throughout the system. Each entry has the time and date incident recorded. Service technician should enter current date in the “TODAY’S DATE” menu section BEFORE checking and logging the last 10 system events. Each entry has a two-letter acronym preceding the event name to identify which piece of equipment generated the event. This event history can be cleared under Thermostat Setup, Reset Factory Defaults.

HP = Heat Pump
AC = Air Conditioner
FN = Furnace
FC = Fan Coil
SPP = Packaged product
SAM = System Access Module
Service — Run / Fault History
The indoor unit and outdoor unit (if communicating) have the following histories:
NOTE: For Critical Fault Screens, see the Troubleshooting section in this document.
Resettable Faults:

  • Fault counters for each piece of equipment that can be reset.

Cycle Counters:

  • Number of heat/cool/power cycles the unit has performed.

Run Times:

  • Lifetime hours of operation in heating, cooling, and how long the unit has been powered.
  • Kilowatt-hours used of electric reheat for dehumidification.

Service — Today’s Date
This menu item allows the installer to enter the current date. It is used for time/date stamping of system faults. This should be verified every time prior to viewing “LAST 10 SYSTEM EVENTS” section.
Service — Model / Serial Numbers
This menu item allows the installer to view the model number and serial number (if available) of all communicating pieces of equipment in the system. This is only available in original factory supplied circuit board. If a circuit board is replaced, the model and serial number information is no longer available.
Service — Service Phone Number
This menu item allows the installer to enter a name and phone number that the homeowner can call for future service of the 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:

  • Use Right Up/Down button to move cursor left and right.
  • Use Left Up/Down button to select numbers and letters.
  • 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:

  • AUTO = No fan operation except during equipment operation.
  • LOW = Approximately 50% of High Speed operation.
  • MED = Half way between High and Low speed operation.
  • 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 Right Up 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 Right Up 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 operations.
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. This changing setpoint is displayed while it is occurring.
NOTE: Temperatures should not be set back so far that the equipment cannot recover in 90 minutes.

Air Filter
If AIR FILTER or AIR PURIFIER 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.

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 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 setpoint is selected in the Advanced Setup COOLING HUMIDITY screen, two other setup options affect Dehumidify operation: COOLING AIRFLOW and DEHUMIDIFY.

COOLING AIRFLOW: Setting this to COMFORT or QUIET will enable the system to use low airflow to help dehumidify the space. If duct sweating becomes an issue, setting DEHUM AIRFLOW to HIGH may resolve the problem. 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), then the cooling unit will be allowed to overcome the space up to 3_F (2_C) if the humidity level is above the cooling humidity target setpoint. 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_F (24_C) and the dehumidify demand is high, overcooling up to 3_F (2_C) is allowed. As the space temperature approaches 70_F (21_C), less overcooling is allowed. At 70_F (21_C) 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 Cooling 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 setpoint, but airflow will be reduced during a normal cooling mode to reduce humidity. The airflow depends on the amount of dehumidifying demand. If Cooling Airflow is set to EFFICIENCY or MAXIMUM, only Dehumidify (overcooling to dehumidify) will be performed.

Hybrid Heat Setup / Operation
Furnace Lockout — (in HYBRID HEAT SETUP menu) is the outside temperature above which the furnace will not run except for defrost (otherwise known as the aux heat lockout).
Heat Pump Lockout — (in HYBRID HEAT 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 settings. The User Interface will not allow the heat pump lockout setting to be above the furnace lockout setting.

The factory default settings for both of these is NONE (no lockouts). Even though a heat pump lockout temperature may be set, the system will still use the furnace in defrost operation, and may stage back down to heat pump when defrost is completed after a2minutedelay.

Hybrid Heat Defrost — (in HYBRID HEAT SETUP) When the outdoor unit needs a defrost cycle, the furnace will run during defrost regardless of lockout temperature, unless told not to in the Hybrid Heat Setup screen. After defrost, the system may stage down to heat pump after a 2-minute delay.

If the room temperature falls below 40_F (4_C) and a furnace lockout is in enabled, the furnace lockout will be overridden to bring on the furnace.

TROUBLESHOOTING

Please refer to the Troubleshooting Guide available on HVAC Partners for more detail.
Infinity Control does not power up.

  1. Recheck wiring to ABCD on all devices.
  2. Make sure all colors match for every terminal.
  3. Make sure power is applied to the indoor unit, and the amber LED is lit on indoor control circuit board.
  4. Check for 24VAC between the C and D terminals at Infinity Control terminal connector and Damper Control Module.
  5. Check fuse on indoor unit’s circuit board.

Display says “Indoor Unit Not Found”

  1. Recheck wiring to ABCD on all devices.
  2. Make sure all colors match for every terminal.
  3. Press left–side button to try again.
  4. If display still reads “Indoor Unit Not Found”, disconnect accessories and all devices from ABCD and connect User Interface directly to indoor unit with a short piece of thermostat wire. Add other devices one at a time to determine where the communication issue exists.

Display says “Outdoor Unit Not Found” and I have a two-stage communicating outdoor unit:

  1. Recheck wiring to ABCD connector on outdoor unit.
  2. Make sure all colors match for every terminal.
  3. Check for 24VAC between the C and D terminal connector of outdoor unit.

I made a mistake on the start-up screens and pressed the right–side button to get to the run mode. How do I get back to startup?

  1. Press the ADVANCED button for at least 10 seconds.
  2. Install/Service menu will appear.
  3. Scroll down to the INSTALL selection.
  4. Press the right–side button; the screen will prompt you to press the right side again to re–install the system.

To check current system status.

  1. Press the right-side button. This will display the current active system faults.
  2. If no faults are active, the Status screen will show status of each component in the system.

SYSTEM MALFUNCTION SCREEN

Fig. 34 -- System Malfunction Screen

Fan Coil

The code number represents flash code on circuit board of fan coil. Certain faults will generate a system malfunction message on the main screen. When this occurs, a technician should proceed to the Last 10 System Events screen in the Service Menu to determine which fault has caused the message.
Below is a list of which faults will result in a System Malfunction event:
Code 37 — Heater output sensed On when not energized
Code 41 — Blower Motor Fault (ventilator, humidifier, dehumidifier, outdoor unit will be turned off)
Code 44 — Motor Communication Fault (ventilator, humidifier, dehumidifier, outdoor unit will be turned off)
Code 45 — Control failure

Furnace
The code number represents flash code on circuit board of furnace.
Code 13 — Limit Circuit Lockout
Code 14 — Ignition Lockout
Code 15 — Blower Motor Lockout (ventilator, humidifier, dehumidifier, outdoor unit will be turned off)
Code 21 — Gas Heating Lockout
Code 22 — Abnormal Flame Proving Signal
Code 23 — Pressure Switch Did Not Open
Code 24 — Secondary Voltage Fuse Open
Code 33 — Limit Circuit Fault AND high heat only is active
Code 41 — Blower Motor Fault (cooling mode only) (ventilator, humidifier, dehumidifier, outdoor unit will be turned off)
Code 45 — Control Circuitry Lockout

NOTE: For codes 13, 14 and 21, the system will use heat pump heating exclusively if available. When the error code is cleared or disappears, furnace heating will resume if still requested.

Service Tool Mode
The –V model of user interface software version 21 can be used as a service tool on any Infinity system. Attach the –V model user interface anywhere on the ABCD wiring (e.g. at the indoor or outdoor unit). When the user interface powers up, it will ask the user if they wish to enter service mode. Selecting “Yes” will allow the –V model user interface to take over as the system controller, putting the regular system user interface to sleep. The screen on the regular user interface will display “IN SERVICE MODE”. The –V model user interface will then learn all equipment and function as the system controller. While in service mode, the –V model user interface will not transfer any settings or information to or from the regular user interface—-it only takes over control of the system. After removing the –V model user interface from the ABCD wiring, the regular user interface will take over the system after two minutes.
Outdoor Unit
The code number represents flash code on circuit board of outdoor unit.

Code 25 — Invalid model plug
Code 45 — Control Failure
Code 47 — No 230V at unit
Code 48 — Loss of inverter communications
Code 69 — Inverter internal fault
Code 73 — Contactor shorted
Code 74 — No high voltage at compressor
Code 76 — Low stage didn’t start three times
Code 78 — High stage didn’t start three times
Code 81 — Thermal lockout in low stage — 4 hrs.
Code 82 — Thermal lockout in high stage — 4 hrs.
Code 83 — Low Pressure Lockout — 4 hrs.
Code 84 — High Pressure Lockout — 4 hrs.
Code 85 — Low contactor open
Code 86 — Low contactor shorted
Code 87 — High contactor open
Code 88 — Inverter Temp Lockout or High Contactor Shorted
Code 96 — VDC under voltage lockout
Code 97– VDC over voltage lockout
Code 99 — High torque lockout
User Interface

  • Temp sensor failed, loss of communication with smart sensor, smart sensor fault. “NO SENSOR DATA” shown
  • Indoor unit communication fault
  • Outdoor unit communication fault
  • Packaged product communication fault
  • NIM communication fault
  • SAM communication fault
  • Possible Frozen Coil
  • High Room Temp Alert, when 100_F exists for at least 10 minutes, and removed when less than or equal to 98_Fexists
  • Low Room Temp Alert, when 38_F exists for at least 10 minutes, and removed when greater than or equal to 40_Fexists
  • High Humidity Alert, when 80% Rh exists for 30 minutes, and removed when less than or equal to 78% Rh exists

The user can press the right side button to dismiss the notice. The regular run mode screen will then appear except “SYSTEM MALFUNCTION” will appear in place of the day/time. If the error has not disappeared within 24 hours, the above display will return. If the error code disappears, “SYSTEM MALFUNCTION” will disappear and the day/time will reappear.

Copyright 2011 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231

Printed in China
Edition Date: 11/11

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Carrier Infinity Control Thermostat Manual SYSTXCCUID01-V – Download [optimized]
Carrier Infinity Control Thermostat Manual SYSTXCCUID01-V – Download

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