CARRIER ComfortVu BACnet TB-24-C - Thermostat

ComfortVu BACnet TB-24-C - Thermostat CARRIER - Free user manual and instructions

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Product Type Thermostat
Brand Carrier
Model ComfortVu BACnet TB-24-C
Dimensions (H x W x D) 4.5 x 4.5 x 1.2 in (114 x 114 x 30 mm)
Weight 0.5 lb (230 g)
Power Supply 24 VAC (50/60 Hz)
Communication Protocol BACnet MS/TP
Display Type LCD with backlight
Key Features Programmable schedule, occupancy sensor, temperature setback, fan control
Temperature Range 50°F to 90°F (10°C to 32°C)
Accuracy ±1°F (±0.5°C)
Maintenance Clean with soft dry cloth; do not use liquids or solvents
Safety Low voltage (24 VAC) - safe for residential use
Spare Parts & Repairability No user-serviceable parts; contact Carrier for replacement
General Information Part of Carrier ComfortVu series; compatible with BACnet building management systems

Frequently Asked Questions - ComfortVu BACnet TB-24-C CARRIER

What is the power requirement for the ComfortVu BACnet TB-24-C thermostat?
The thermostat requires a 24 VAC power supply (50/60 Hz). It is a low-voltage device typically powered by a dedicated transformer.
How do I wire the thermostat to my HVAC system?
Refer to the wiring diagram in the manual. Common terminals include R (power), C (common), Y (cooling), W (heating), G (fan), and RS+/RS- for BACnet communication.
Can I use this thermostat with a heat pump?
Yes, the TB-24-C supports heat pump systems with auxiliary heat. Configure the thermostat for heat pump mode during setup.
How do I set a weekly schedule?
Access the scheduling menu from the main screen. You can set up to 4 time periods per day (Morning, Day, Evening, Night) with separate temperature setpoints.
What is the BACnet object instance number?
The default BACnet device instance is 0. You can change it via the configuration menu (range 0-4194303).
How do I reset the thermostat to factory defaults?
Press and hold the Menu button for 10 seconds, then select 'Factory Reset'. All settings will be cleared.
Why is the display blank?
Check the 24 VAC power supply and wiring. If power is present, the backlight may be disabled; press any button to wake the display.
Can I use this thermostat with a smart home system?
Yes, via BACnet integration. It can be linked to building management systems or BACnet-to-IP gateways for remote access.
What is the temperature accuracy?
The thermostat has an accuracy of ±1°F (±0.5°C) over its operating range.
How do I change the temperature scale from Fahrenheit to Celsius?
Go to the Settings menu, select 'Temperature Scale', and choose Celsius. The display will update immediately.

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USER MANUAL ComfortVu BACnet TB-24-C CARRIER

Installation and Operation Guide

Carrier

11.6 OFF We 0750 PM C/F Prog On/Off Mode Fan

CARRIER CORPORATION ©2020 · Catalog No. 11-808-723-01 · 4/7/2020

CARRIER ComfortVu BACnet TB-24-C - Installation and Operation Guide - 2

Verify that you have the most current version of this document from www.hvacpartners.com or

www.accounts.ivusystems.com or your local Carrier office.

Important changes are listed in Document revision history at the end of this document.

CARRIER CORPORATION ©2020. All rights reserved throughout the world. i-Vu is a registered trademark of Carrier Corporation. All other trademarks are the property of their respective owners.

Contents

Overview 1

Specifications....2

TBPL-24-H Dimensions 4

Technician Settings Index....5

Operating Instructions....7

Quick Guide 7

Turning the thermostat ON and OFF....8

Selecting temperature scale....8

Adjusting the Setpoint temperature....8

Selecting system mode 9

Selecting fan speed (for 2 and 3 fan speeds configuration)....10

Turning Auto fan ON or OFF (fan on demand)....10

Locking the thermostat buttons....11

Economy mode 11

Freeze Protection....12

Economizer 12

Weekly program 14

MAC Address and BACnet Device Instance Number....19

Installation 21

General....21

Wiring terminals 22

DIP switch and jumper configurations 24

AC configurations....25

FC configurations for 2-pipe systems....26

FC configurations for 4-pipe systems / Floor heating....27

Wiring and DIP switch/jumper configurations 1 to 4 - AC systems....28

Wiring and DIP switch/jumper configurations 5 to 7 - AC systems....29

Wiring and DIP switch/jumper configurations 8 to 9 - AC systems....30

Wiring and DIP switch/jumper configurations 10 to 13 - AC systems.... 31

Wiring and DIP switch configurations 16 to 19 - AC systems....32

Wiring and DIP switch/jumper configurations 20 to 23 - FC systems - 2-pipe ....33

Wiring and DIP switch/jumper configurations 24 to 27 - FC systems - 4-pipe 34

Wiring and DIP switch/jumper configurations 28 to 30 - FC systems - 4-pipe .... 35

Wiring and DIP switch/jumper configurations 31 to 34 - FC systems - 4-pipe .... 36

Wiring and DIP switch/jumper configurations 35 to 38 - FC systems - 4-pipe .... 37

Wiring and DIP switch/jumper configuration 39 - FC systems - 4-pipe....38

Wiring and DIP switch/Jumper configurations 40 to 41 - FC systems - 4-pipe .... 39

Wiring and DIP switch/jumper configurations 42 to 44 - FC systems - 4-pipe .... 40

Wiring and DIP switch/jumper configurations 45 to 47 - FC systems - 4-pipe .... 41

Technician Settings 42

Technician Settings P01 to P03 42

Technician Settings P04 to P07 43

Technician Settings P08 to P10....44

Technician Settings P11 to P15....45

Technician Settings P16 to P25....46

Technician Settings P26 to P30....47

Technician Settings P31 to P34....48

Technician Settings P35 to P42....49

Technician Settings P43 to P44....50

Technician Settings P45 to P46....51

Contents

Technician Settings P47 to P48....52

Technician Settings P49 to P51....53

Technician Settings P52 to P57....54

Technician Settings P60 to P64....55

Technician Settings P65 to P70....56

Technician Settings P71 to P75....57

Technician Settings P76 to P79....58

Technician Settings P83 to P88....59

Technician Settings P89 to P99....60

Technician Settings P101 to P111....61

Technician Settings P114 to P119....62

Technician Settings P122 to P188....63

Technician Settings P189 to P195....64

Technician Settings P196 to P200....65

Alarms and indications 66

Document revision history....67

Overview

The Carrier Corporation ComfortVu™ BACnet Thermostat Model TB-24-HM can be used:

• As a stand-alone thermostat that can control equipment using built-in logic
• As part of an MS/TP network of BACnet Thermostats that can be managed from a BMS front-end system
- As part of a BACnet MS/TP network connected to the Carrier Corporation BACnet router in a i-Vu® system. The router's control programs provide trending and alarming of the BACnet Thermostat's data.

The TB-24-HM thermostat has a white plastic enclosure with an LCD display and buttons for user control. It has on-board temperature sensing, and its on-board inputs and outputs are used to control equipment and optional external sensing devices. Inputs and outputs are configured using DIP switches and jumpers. The TB-24-HM thermostat requires 24 Vac power.

Specifications

Sensing element:RangeAccuracy
Temperature41°F to 95°F (5°C to 35°C)±1.0°F (0.5°C)
Humidity10% to 90%±3.0% typical
Motion Sensing:
Sensor TypePIR, quad, omnidirectional
Distance16.4 feet (5m)
Detection range(HxV) 90° x 30°
Movement speed2.62 to 3.94 ft/s (0.8 to 1.2 m/s)
Detection object15.75 x 9.84 in. (400 x 250 mm)
Power 24 Vac, ±10%, 50-60Hz, 4VA
NOTE Devices connected to outputs, such as a fan, will increase VA requirements.
CommunicationBACnet MS/TP with baud rates up to 76.8 kbps (default baud rate is 38.4 kbps), detected and set automatically by the BACnet Thermostat. Max 127 devices.
InputsT1, 0 - Normally open or normally closed dry contract, or0-10 Vdc analog input, or50 kOhm thermistor @ 25°CA, B - Communication +/- (RS485)IN1, 0 - Normally open or Normally closed dry contract, or0-10 Vdc analog input, or50 kOhm thermistor @ 25°C, R - Power: 24 Vac
Outputs11, 12, 13 - Digital outputs, 3A max.14 - Digital outputs 0.3A max.15 and 16 - Depends on application.Digital output 0.3A max., orAnalog output 0-10 Vdc, 5 mA max., not isolated
Environmental operating range50° to 122°F (10° to 50°C), 10 to 90% relative humidity, non-condensing
MountingIf using an electrical box, mount the included wallplate to a standard 4" x 2" electrical box using the two larger mounting screws, then mount the thermostat to the wallplate using the three smaller mounting screws.If not using an electrical box, flush-mount thermostat to wall (no wallplate needed).

Weight 4.8 oz (0.14 kg)

Compliance United States of America:

FCC CFR47, Chapter 1, Subchapter A, Part 15, Class B

Canada:

Industry Canada Compliant, ICES-003, Class B

Europe:

CE Mark, Low Voltage Directive: 2014/35/EU RoHS Compliant: 2011/65/EU

Australia and New Zealand:

CARRIER ComfortVu BACnet TB-24-C - Overview - 1

C-Tick Mark, AS/NZS 61000-6-3

Title 24 compliant if connected to a BMS with custom programming for economizer fault detection.

CA Prop 65 Warning: This product can expose you to chemicals including Styrene and 1,3

- Propane sultone, which are known to the State of California to cause cancer. For more information, go to www.p65warnings.ca.gov.

TBPL-24-H Dimensions
CARRIER ComfortVu BACnet TB-24-C - Overview - 2

Technician Settings Index

P01 - Offset for temperature readings calibrationP40 - View filter counter (hours) - Read only
P02 - Set point limit for coolingP41 - Reset filter time
P03 - Set point limit for heatingP42 - Adjust filter alarm delay counter (hours)
P04 - Lock the [Fan] buttonP43 - Soft start in heat - cut-in temperature
P05 - Lock the [Mode] buttonP44 - Soft start in heat - cut-out temperature
P06 - Lock the [On/Off] buttonP45 - Cool differential band
P07 - Lock the [+] and [-] buttons (Set buttons)P46 - Cool differential band offset
P08 - Functionality of T1 terminalsP47 - Heat differential band
P09 - Functionality of IN1,0 terminalsP48 - Heat differential band offset
P10 - Window contact (terminals IN1,0) polarityP49 - Shift between Cool and Heat in Auto mode
P11 - Window contact delay timeP50 - Shift between Cooling stages
P12 - Door switch (terminals T1,0) polarityP51 - Shift between Heating stages
P13 - Door switch delay timeP52 - Cool valve proportional band
P14 - Enable/Disable Auto change over modeP53 - Cool proportional low limit
P15 - Occupancy sensor logic (PIR)P54 - Cool proportional high limit
P16 - Enable/Disable Occupancy sensorP55 - Heat valve proportional band
P17 - PIR (occupancy sensor) delay timeP56 - Heat proportional low limit
P18 - Door switch or key tag configurationP57 - Heat proportional high limit
P19 - PIR (Occupancy sensor) polarityP60 - Proportional ON percent
P25 - Economy set point for coolingP61 - Proportional OFF percent
P26 - Economy set point for heatingP63 - Time on-delay between cooling stages
P27 - On-delay time on-delay between heating stagesP64 - Time off-delay between cooling stages
P28 - Off-delay time between heating stagesP65 - Fan VFS proportional band in cooling
P30 - Beeper ON or OFFP66 - Fan VFS proportional band in heating
P31 - Fan ON delay in coolingP67 - Fan VFS Low speed percent in cooling
P32 - Fan OFF delay in coolingP68 - Fan VFS Medium speed percent in cooling
P33 - Fan ON delay in heatingP69 - Fan VFS High speed percent in cooling
P34 - Fan OFF delay in heatingP70 - Fan VFS Low speed percent in heating
P35 - Enable/Disable Freeze protectionP71 - Fan VFS Medium speed percent in heating
P36 - Freeze protection cut-in set pointP72 - Fan VFS High speed percent in heating
P37 - Freeze protection cut-out set pointP74 - VFS Medium speed differential
P75 – VFS High speed differentialP109 – Weekly program event configuration
P76 – Fan VFS Low limit in coolingP111 – PIR Sensitivity
P77 – Fan VFS High limit in coolingP114 – Cool PID Kp
P78 – Fan VFS Low limit in heatingeat PID Kp
P79 – Fan VFS High limit in heatingP116 – Cool PID Ki
P83 – View T2 temperature sensor readingsP117 – Heat PID Ki
P84 – View T3 temperature sensor readingsP118 – Cool PID Kd
P85 – Deice in cool – cut-in temperatureP119 – Heat PID Kd
P86 – Deice in cool – cut-out temperatureP122 – Cool Proportional output threshold time
P87 – Deice in heat timeP123 – Heat Proportional output threshold time
P88 – Deice in heat break timeP160 – Minimum compressor ON time
P89 – Deice in heat – cut-in temperatureP161 – Minimum compressor OFF time
P90 – Deice in heat – cut-out temperatureP170 – Economizer low limit temperature
P91 – Compressor delayP193 – Display switching time (between temp and hum)
P98 – Display set point only (hide room temperature)P194 – Humidity differential band
P99 – One or Two set pointsP195 – Humidity sensor reading offset
P101 – Screen dimming delayDead zone between humidification and dehumidification
P107 – Weekly program configurationumidity setpoint
P108 – Weekly program - events per dayP198 – Not in use
P200 – Restore defaults

Press the [On/Off] button or wait 60 seconds to return to normal display.

Operating Instructions

Quick Guide
CARRIER ComfortVu BACnet TB-24-C - Operating Instructions - 1

flowchart
graph TD
    A["Temperature/Humidity indications: °C/F - Temperature scale<br>Hu% - Ambient Humidity<br>SET - Set-point adjust."] --> B["75.5 ON/OFF"]
    C["Ambient/Set-point indication temperature Ambient humidity indication"] --> B
    D["Thermostat On/Off indication"] --> B
    E["System MODE indication: Fan only<br>Cooling<br>Heating<br>Auto mode"] --> B
    F["Clock / Weekdays"] --> B
    G["Press to switch between temperature scales (°C/°F) <br>Press and hold to enter weekly program settings <br>Press and hold to enter technician settings (set-point must be equal to 10°C/50°F) <br>Press and hold to enter MAC Address settings (set-point must be equal to 11°C/52°F)"] --> B
    H["Fan speeds indication: AUTO — Auto speed — High — Medium — Low — AF — Fan on demand"] --> B
    I["Indications: Alarm — Button locked — Program active"] --> J["Program events indications: Prog1234 — Event per day — Start — Adjust start time — Stop — Adjust stop time — Clock — Adjust the clock"]
    J --> K["Set-point adjustment"]
    L["Press to select System Mode: Cool/Heat/Auto"] --> K
    M["Press to turn unit On or Off"] --> K

Turning the thermostat ON and OFF

Press the [On/Off] button to turn the thermostat ON or OFF.

CARRIER ComfortVu BACnet TB-24-C - Turning the thermostat ON and OFF - 1
ON

CARRIER ComfortVu BACnet TB-24-C - Turning the thermostat ON and OFF - 2
OFF

Selecting temperature scale

[C/F] button to switch between temperature scales.

CARRIER ComfortVu BACnet TB-24-C - Selecting temperature scale - 1
Celsius

CARRIER ComfortVu BACnet TB-24-C - Selecting temperature scale - 2
Fahrenheit

Adjusting the Setpoint temperature

Note: The setpoint must be different than 10, 11°C/50, 52°F.

In One setpoint configuration:

1 Press the [+] or [-] buttons once to view the setpoint temperature.
2 Press again to adjust the setpoint.

CARRIER ComfortVu BACnet TB-24-C - In One setpoint configuration: - 1
Set point

In Two setpoints configuration:

1 Press the [+] or [-] buttons once - "※" and the setpoint temperature for cooling will appear on display.
2 Use the [+] or [-] buttons to adjust the setpoint for cooling.
3 Press the [Mode] button or wait 3 seconds. "..." and the setpoint temperature for heating will appear on display.
4 Use the [+] or [-] buttons to adjust the setpoint for heating.

  • The setpoint for cooling must be higher than the setpoint for heating.
    • For humidity setpoint, see Technician Setting P197.

CARRIER ComfortVu BACnet TB-24-C - In Two setpoints configuration: - 1
Setpoint For cooling

CARRIER ComfortVu BACnet TB-24-C - In Two setpoints configuration: - 2
Setpoint For heating

Selecting system mode

Press the [Mode] button to switch between system modes.

Notes:

  • During demand for cooling or heating, the active mode will flash.
    • In Auto mode, the active mode icon (Cool or Heat) will flash.
    • Auto mode is not available in 2-Pipe system configuration.

CARRIER ComfortVu BACnet TB-24-C - Selecting system mode - 1

CARRIER ComfortVu BACnet TB-24-C - Selecting system mode - 2
Auto

CARRIER ComfortVu BACnet TB-24-C - Selecting system mode - 3

CARRIER ComfortVu BACnet TB-24-C - Selecting system mode - 4
Fan only

Selecting fan speed (for 2 and 3 fan speeds configuration)

Press the [Fan] button to switch between fan speeds.

Notes:

• In Auto speed, the active fan speed icon will appear on display.
• Medium speed available in 3 speeds configuration.
- Auto Speed in AC configurations: the differential parameter (speed change between stages) is determined by constant 0.7^ C ( 1.4^ F)
- Auto Speed in FC configurations: the differential parameter is determined by object AV#59 - DifferentialOnOffFanSpeed

CARRIER ComfortVu BACnet TB-24-C - Selecting fan speed (for 2 and 3 fan speeds configuration) - 1
Low

CARRIER ComfortVu BACnet TB-24-C - Selecting fan speed (for 2 and 3 fan speeds configuration) - 2
Medium

CARRIER ComfortVu BACnet TB-24-C - Selecting fan speed (for 2 and 3 fan speeds configuration) - 3
High

CARRIER ComfortVu BACnet TB-24-C - Selecting fan speed (for 2 and 3 fan speeds configuration) - 4
Auto

Turning Auto fan ON or OFF (fan on demand)

In 1-speed configuration:

Press the [Fan] button to turn Auto fan ON or OFF.

In 2- and 3-speed configurations:

Press and hold the [Fan] button for 7 seconds to turn Auto fan ON or OFF.

  • When ON, the fan will run on demand for cooling or heating.
  • When OFF, the fan will run continuously.

Note: Auto fan cannot be selected in Fan only mode.

CARRIER ComfortVu BACnet TB-24-C - In 2- and 3-speed configurations: - 1
Auto fan OFF

CARRIER ComfortVu BACnet TB-24-C - In 2- and 3-speed configurations: - 2
Auto fan ON

Locking the thermostat buttons

  • Press and hold the [Mode] button for 7 seconds to lock or unlock the thermostat buttons.
  • When locked, the lock ( 🔍 ) icon will appear on display with any attempt to press the buttons.
  • Enable or disable the option to lock different buttons using Technician Settings P04-P07.

CARRIER ComfortVu BACnet TB-24-C - Locking the thermostat buttons - 1
Lock indications
Lock indications

Economy mode

Activate Economy mode by triggering a window contact - remote on/off switch, window contact - remote economy switch, door switch, key-tag, External motion sensor (PIR - passive infrared sensor) or through communication - binary value "UnoccupiedByNetwork".

E1Economy by Window contact - Remote On/Off switch - Turning unit offEconomy by Window contact - Remote economy switch - Using economy set pointsRefer to technician parameters P25 and P26 for economy set points
E2Economy by External motion sensor (PIR) or through Communication (binary value “UnoccupiedByNetwork”)Refer to technician parameter P15 “Occupancy sensor logic (PIR)”
E4Economy triggered by Door switchRefer to technician parameter P18 “Door switch or key tag configuration”
E5Economy by Key-tagRefer to technician parameter P18 “Door switch or key tag configuration”

Freeze Protection

The Freeze protection feature will not allow the room temperature to drop below predefined cut-in temperature. Depending on which configuration the system is operating under (W/WO Heat pump), this feature will force the system to operate in heat mode and activate the fan.

This feature will take effect when the thermostat is either ON or OFF. When the room temperature rises above the predefined cut-out temperature, the thermostat will return to its previous state.

When freeze protection is activated, the display alternates between "AL" and room temperature.

CARRIER ComfortVu BACnet TB-24-C - Freeze Protection - 1

line | Time | Temperature (Normal work) | Temperature (Freeze protection) | |------|---------------------------|----------------------------------| | 0 | High | Low | | 1 | Medium | Medium | | 2 | Low | Low | | 3 | Very Low | Very Low | | 4 | High | High |

Economizer

Economizer is used to reduce the energy consumed by the cooling systems, by using low external air temperatures to assist in the chilling process. When outdoor temperatures are lower relative to indoor (room) temperatures, the system utilizes the cool outdoor air as a free cooling source.

The outdoor temperature (Teconomizer) triggering the activation of the economizer, can be measured by the temperature sensor connected to T1,0 terminals (technician parameter P08="05") or by setting a temperature value manually through communication - AV#129 "TEconomizerEffective".

When getting the temperature through communication, terminals T1,0 can be used for any other functionality like External sensor/Soft start in heat sensor/De-icing in cool/Door switch/Key tag.

Whenever there is demand for cooling and the outdoor temperature conditions allow the operation of the economizer, it will operate together with the regular cooling system and will not replace it.

Economizer will start when, and run as long as, both of the following conditions are satisfied:

1 Teconomizer temperature < Room temperature - (Cool differential band / 2)
2 Room Temperature > Setpoint temperature

Economizer will stop when the following condition is satisfied:

Room Temperature < Setpoint temperature - (Cool differential band / 2)

CARRIER ComfortVu BACnet TB-24-C - Economizer - 1

flowchart
graph LR
    A["Teconomizer"] --> B["Room Temp."]
    C["Room Temp."] --> D["Setpoint"]
    D --> E["Cool differential band"]
    E --> F["Temperature"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#cff,stroke:#333
    style F fill:#ffc,stroke:#333

Indication for the Economizer operation:

When Economizer is active, the "Cool" symbol will appear (or flash when active) on display and the "Fan" symbol will flash.

CARRIER ComfortVu BACnet TB-24-C - Indication for the Economizer operation: - 1
Economizer Active

Weekly program

General

Prior to programming, make sure that Technician Settings P107, P108, and P109 are configured correctly.

Program types

The thermostat can be configured to run four different types of weekly programs (set by Technician Setting P107):

• 7-day program with same parameters for all days.
• 7-day program with different parameters for each day of the week.
• One schedule for the weekdays (Monday to Friday), one schedule for Saturday and another one for Sunday.
• One schedule for the weekdays (Monday to Friday) and another one for Saturday and Sunday.

Daily events

Each daily program can use 2 or 4 schedule events per day (set by Technician Setting P108).

There are two options for settings the schedule events (set by Technician Setting P109):

• "EU Type" - Start time and Stop time.
- "US Type" - Start time, setpoint temperatures, system mode and fan speed.

IMPORTANT

  • Parameter P107 must not be equal to "0" in order to enable weekly program capabilities.
  • Changing P107 to "0" will disable all program capabilities and reset programmed information.

Enabling/Temporarily Disabling/Overriding the program

• Activate the program

  • When the program is activated, a clock icon appears on the display.
    If a clock icon does not appear, ensure that the set-point temperature is not 10/11°C or 50/52°F, press and hold the button to activate the program.

CARRIER ComfortVu BACnet TB-24-C - Enabling/Temporarily Disabling/Overriding the program - 1

- Temporarily disable the program - without losing programmed information – for example, when out of the office or leaving for vacation:

  • Make sure that the set-point temperature is not 10/11°C or 50/52°F.
    Press and hold the button to temporarily disable the program.
    Press and hold the button again to reactivate to the program.

- Override the program - the occupant can temporarily change the set point temperature to be different than the set point temperature specified by the program. Changes remain in effect until the next program event begins.

Programming procedure

  • The detailed programming procedure is described in the next sections. Make sure to follow the right programming procedure, suitable for the program type and features selected by Technician Settings.
  • Press the [C/F-Prog] button to enter and proceed through the steps of the real time clock and programming procedure.
    • Use the [+] or [-] buttons to select or change value of a flashing icon.
  • It is recommended to select programming values prior to the actual programming.

Exit the programming procedure

At any time during the programming procedure, press the [On/Off] button to exit and return to normal display. Any changed values will be saved.

Adjusting the time and day of the week

  1. Press and hold the [C/F-Prog] button. The word "Clock" will appear on display, and the HOURS will flash.

Hours

  1. Use the [+] or [-] buttons to adjust the hours.

CARRIER ComfortVu BACnet TB-24-C - Hours - 1

Minutes

  1. Press the [C/F-Prog] button again. The MINUTES will flash.
  2. Use the [+] or [-] buttons to adjust the hours.

CARRIER ComfortVu BACnet TB-24-C - Minutes - 1

Days

  1. Press the [C/F-Prog] button again. The DAYS will flash.
  2. Use the [+] or [-] buttons to select the day.
  3. If Technician Setting P107 is not set to "00" (program is enabled), press the [C/F-Prog] button to enter programming procedure. Be sure to follow the right programming procedure, suitable for the program type and features selected by Technician Settings.

Section C - "EU Type"

Section D - "US Type"

Otherwise, press the [C/F-Prog] button to return to normal display.

CARRIER ComfortVu BACnet TB-24-C - Days - 1

Adjusting "EU type" daily programs

Start time

  1. Press the [C/F-Prog] button. The programmed weekday(s), "Prog 1" indicating the first program event of the day and the word "Start" will appear on display.

The HOURS will flash.

Note: If this is the first time a program is being set, the symbols “-” will flash.

  1. Use the [+] and [-] buttons to adjust the start time hours of the first event.
  2. Press the [C/F-Prog] button again. The MINUTES will flash.
  3. Use the [+] and [-] buttons to adjust the start time minutes of the first event.

CARRIER ComfortVu BACnet TB-24-C - Start time - 1

CARRIER ComfortVu BACnet TB-24-C - Start time - 2

CARRIER ComfortVu BACnet TB-24-C - Start time - 3

CARRIER ComfortVu BACnet TB-24-C - Start time - 4

Stop time

  1. Press the [C/F - Prog] button again. T the word "Stop" will appear on display, and the HOURS will flash.
  2. Use the [+] and [-] buttons to adjust the stop time hours of the first event

CARRIER ComfortVu BACnet TB-24-C - Stop time - 1

CARRIER ComfortVu BACnet TB-24-C - Stop time - 2

  1. Press the [C/F-Prog] button again. The MINUTES will flash

  2. Use the [+] and [-] buttons to adjust the stop time minutes of the first event

CARRIER ComfortVu BACnet TB-24-C - Stop time - 3

CARRIER ComfortVu BACnet TB-24-C - Stop time - 4

  • Follow the steps above for the other schedule events of the same daily period (P2 for two events per day, or P2, P3, and P4 for four events per day).
    • Follow the steps above for all daily periods.

Adjusting "US type" daily programs

Start time

  1. Press the [C/F-Prog] button. The programmed weekday(s), "Prog 1" indicating the first program event of the day and the word "Start" will appear on display.

The HOURS will flash.

Note: If this is the first time a program is being set, the symbols “--” will flash.

  1. Use the [+] and [-] buttons to adjust the start time hours of the first event.
  2. Press the [C/F-Prog] button again. The MINUTES will flash.
  3. Use the [+] and [-] buttons to adjust the start time minutes of the first event.

CARRIER ComfortVu BACnet TB-24-C - Start time - 1

CARRIER ComfortVu BACnet TB-24-C - Start time - 2

CARRIER ComfortVu BACnet TB-24-C - Start time - 3

CARRIER ComfortVu BACnet TB-24-C - Start time - 4

System mode and fan speed

  1. Press the [C/F-Prog] button again. The system MODES will flash.
  2. Use the [+] and [-] buttons to select the system mode of the first event
  3. Press the [C/F-Prog] button again. The FAN SPEEDS will flash.
  4. Use the [+] and [-] buttons to select the fan speed of the first event.

Setpoint

  1. Press the [C/F - Prog] button again. The setpoint will flash.

Note: If the thermostat is configured to have two setpoints, first adjusts the setpoint for cooling and then the setpoint for heating.

  1. Use the [+] and [-] buttons to adjust the setpoint of the first event.

CARRIER ComfortVu BACnet TB-24-C - Setpoint - 1

CARRIER ComfortVu BACnet TB-24-C - Setpoint - 2

CARRIER ComfortVu BACnet TB-24-C - Setpoint - 3

CARRIER ComfortVu BACnet TB-24-C - Setpoint - 4

CARRIER ComfortVu BACnet TB-24-C - Setpoint - 5

  • Follow the steps above for the other schedule events of the same daily period (P2 for two events per day, or P2, P3 and P4 for four events per day).
    • Follow the steps above for all daily periods.

MAC Address and BACnet Device Instance Number

MAC Address

To set the communication MAC Address:

1 Adjust the setpoint temperature to 11^ C or 52^ F.
2 Press and hold the [C/F] button for 10 seconds to enter MAC Address configuration mode.
3 Use the [+] or [-] buttons to define the MAC Address (range 1...127).
4 When finished, press the [On/Off] button and readjust the setpoint.
5 Switch power supply off and on again for the MAC address changes to take effect.

00 Ad 12 Ad MAC Address 1...127

Caution: Do not use the same MAC address for two devices on the same communication bus!

BACnet Device Instance Number

By default, the BACnet Device Instance Number is generated automatically by the thermostat (Vendor ID + MAC address). For example, Carrier Corporation vendor ID is 16, and if the MAC address is 075, the BACnet Device Instance Number is 16075.

Note: If you change the MAC address, you must cycle the thermostat's power to reset the BACnet Device Instance Number.

You can override the automatically-generated BACnet Device Instance Number using the i-Vu® application, an Analog Network Output microblock in a control program, or some other BACnet utility. Write the new BACnet Device Instance Number to the present_value property of Analog Value 42 (BACnetDeviceInstanceNumber).

Examples:

In the i-Vu® application

1 Use the BACnet Discovery feature to discover the BACnet Thermostat and its BACnet objects.
2 In the navigation tree, select the Analog Value called BacnetDeviceInstanceNumber.

3 Change the Present Value field (shown below) to the desired BACnet Device Instance Number.

Display Name: BacnetDeviceInstanceNumber Description: ? Profile Name: ? Present Value = 160102 ?▼ Command priority for writing: ?▼

4 Click Accept.

In an Analog Network Output microblock

To change the BACnet Device Instance Number from 16075 to 16113, the microblock's address would be:

bacnet://16075/AV:42/present_value,or

bacnet://16075/BACnetDeviceInstanceNumber

Subsequent reads/writes of this value will need to be done with the new device instance:

bacnet://16113/AV:42/present_value,or

bacnet://16113/BACnetDeviceInstanceNumber

Installation

Mount the BACnet Thermostat on an interior wall in the room to be controlled. Locate it where the occupant can easily read the LCD display and use the controls. If the built-in temperature sensor is being used to measure room temperature, place the thermostat where the temperature is representative of the general room conditions. Avoid cold or warm air drafts, radiant heat, and direct sunlight.

CARRIER ComfortVu BACnet TB-24-C - Installation - 1

WARNING: Risk of electric shock and property damage. Disconnect power supply before making electrical connections. The installation is to be performed by a qualified electrician.

CARRIER ComfortVu BACnet TB-24-C - Installation - 2

WARNING: The integrated circuits in the controller are sensitive to static currents. Take suitable precautions.

General

Installation procedure

A. Separate the front panel from the back panel by pressing the tab located in the top of the unit and pulling the back panel off of the two bottom tabs.
B. Do one of the following:

  • If using an electrical box, mount the included wallplate to a standard 4" x 2" electrical box using the two larger mounting screws, then mount the thermostat to the wallplate using the three smaller mounting screws. Insert the screw cap into the wallplate's bottom screw hole.
  • If not using an electrical box, flush-mount the thermostat to the wall (no wallplate needed).

C. Make electrical connections as shown in the picture below and the wiring diagram (page 22). Set DIP switch positions as explained in this manual.

D. Reattach the cover by placing it on the back panel's two bottom tabs and then pushing the cover until the top tab clicks into its slot on the cover.

Diagram of a portable electronic device with labeled parts and directional arrows indicating rotation or adjustment.

Technical diagram of an electronic device with labeled components and red dashed lines indicating internal connections

CARRIER ComfortVu BACnet TB-24-C - Installation procedure - 3

natural_image Technical line drawing of an electrical switch panel with two terminal blocks and wiring (no text or symbols)

Diagram of a device with labeled ports and directional arrows indicating rotation or movement

PIR detection area
Horizontal (Top view) 90°

Vertical (Side view) 20° 1.5m / 5ft 5m / 16ft

Wiring terminals
a. b. c. d. e. 11 12 13 14 T1 0 B (-) A (+) IN1 0 15 16 C* R*

Terminals

a For outputs 11-16, see Wiring and DIP switch/jumper settings (page 28).
b For T1,0 inputs: Dry contact, 10 Vdc input, or 50 kOhm thermistor See Technician Setting P8.
c MS/TP Communication (RS485): BACnet
d For IN1,0 functionality – please refer to parameter P9 in the technician settings section. T2 change over sensor / Soft start in heat sensor / Window contact Remote On/Off switch / Window contact Remote economy switch / External PIR
e Power supply: 24 Vac

CARRIER ComfortVu BACnet TB-24-C - Installation procedure - 8

CAUTION Do not connect line voltage to a thermostat that does not show the following symbol: 110-230V

DIP switch and jumper configurations
JP2JP3 SW4 SW1 SW3

SW4.1 - Without valves control in FC config.

OFF - Enable valves control

ON - Disable valves control

SW4.2 - Enable/Disable PIR detector

OFF - Enable PIR detector

ON - Disable PIR detector

SW4.3 - Not used

Always OFF

SW4.4 - End of line resistor (120Ω)

OFF = Not end of line

ON = End of line

CARRIER ComfortVu BACnet TB-24-C - SW4.4 - End of line resistor (120Ω) - 1

flowchart
graph LR
    A["•"] --> B["□"]
    B --> C["□"]
    C --> D["•"]
    D --> E["End of line"]
    style A fill:#fff,stroke:#000
    style B fill:#fff,stroke:#000
    style C fill:#fff,stroke:#000
    style D fill:#fff,stroke:#000
    style E fill:#fff,stroke:#000
    subgraph Communication line
        B
        C
        D
    end

JP2, JP3 - Outputs 15,16 - Analog or Digital

JP2 - Output 16

Position 1- Analog output

Position 3- Digital output

JP3 - Output 15

Position 1- Analog output

Position 3- Digital output

SW1.1 through SW1.6, and SW3.1 through SW3.8

See Wiring and DIP switch/jumper settings (page 28).

CARRIER ComfortVu BACnet TB-24-C - SW1.1 through SW1.6, and SW3.1 through SW3.8 - 1

AC configurations

Find the configuration you want in the tables below, then find that configuration number (1 through 9) on the Wiring and DIP switch/jumper settings.

AC Configurations without humidification/dehumidification

OutputsConfiguration123456789
Heat elements (max.)3 21 21 21
Compressors (max.)2 22 1 1 11 2 2
Heat pump• •
Fan VFS• •
Fan speeds1 12 or 3 2or 3 2 or 31 1
Economizer○ ○○ ○
Humidifier
Dehumidifier
Reheat (Dehumidify)

AC Configurations with humidification/dehumidification

OutputsConfiguration101113141516171819
Heat elements2 21 1 11 2 11
Compressors2 11 1 21 1 111
Heat pump
Fan VFS
Fan speeds1 12 or 32 or 31 11 111
Economizer
Humidifier
Dehumidifier
Reheat (Dehumidify)
  • Yes - Option

FC configurations for 2-pipe systems

Find the configuration you want in the tables below, then find that configuration number (20 through 23) on Wiring and DIP switch/jumper settings.

FC Configurations for 2-Pipe systems without humidification/dehumidification

OutputsConfiguration20212223
CI/Ht valve / CI/Ht valve PID• PID• PID
Heat element (2nd stage)• •• •
Fan VFS• •
Fan speeds123123
Economizer○ ○
Humidifier
Dehumidifier
Reheat (Dehumidify)

FC Configurations for 2-Pipe systems with humidification/dehumidification

OutputsConfiguration24252627282930
CI/Ht valve / CI/Ht valve PID• PID • PID• PID •
Heat element (2nd stage)• •• •
Fan VFS• •
Fan Speeds123123123123
Economizer○ ○
Humidifier• •
Dehumidifier• •
Reheat (Dehumidify)• •• •
  • Yes - Option

FC configurations for 4-pipe systems / Floor heating

Find the configuration you want in the tables below, then find that configuration number (31 through 39) on the Wiring and DIP switch/jumper settings.

FC Configurations for 4-Pipe systems without humidification/dehumidification

OutputsConfiguration313233343536373839
Cool valve / Cool valve PIDPIDPIDPIDPID
Heat valve / Heat valve PIDPIDPIDPID
Heat element (2nd stage)
Fan VFS• •
Fan speeds123123123123123123
Economizer○ ○
Humidifier
Dehumidifier
Reheat (Dehumidify)
Floor heating

FC Configurations for 4-Pipe systems with humidification/dehumidification

OutputsConfiguration4041424344454647
Cool valve / Cool valve PID• PID• PID• •PID •
Heat valve / Heat valve PID• •• • PID• •PID
Heat element (2nd stage)• •
Fan VFS
Fan speeds123123123123123123123123
Economizer
Humidifier• •
Dehumidifier• •
Reheat (Dehumidify)• •
Floor heating
  • Yes - Option

Wiring and DIP switch/jumper configurations 1 to 4 - AC systems

OutputsConfig. 1: HC321 Speed fanConfig. 2: HP421 Speed fanConfig. 3: HP222/3 Speeds fanConfig. 4: HP212/3 Speeds fan
11Heat element 3 (3rd stage heat)Heat element 2 (4th stage heat)Fan highFan high
12Heat element 2 (2nd stage heat)Heat element 1 (3rd stage heat)Fan medium (or Economizer(5))Fan medium (or Economizer(5))
13Fan (1 speed)Fan (1 speed)Fan lowFan low
14Compressor 2Compressor 2Compressor 2Heat element(2)
15Compressor 1(3)Compressor 1(3)Compressor 1(3)Compressor(3)
16Heat element 1(2)(1st stage heat)Heat pump(2)Heat pump(2)Heat pump(2)
SW3
SW1
JumpersJP2, JP3analogoutputs

(1) SW3.1, SW3.2 - Fan speeds:
2 speeds (Low and High):
3 speeds (Low, Med., and High):
SW3.1 = OFF, SW3.2 = ON
SW3.1 = OFF, SW3.2 = OFF
(2) SW3.4 - HP (Heat pump): HC (not heat pump):
ON = Heat pump active in cool, OFF = Heat pump active in heat ON = Electrical heater, OFF = Oil/Gas heater (no fan)
(3) SW3.5 - Compressor delay:
ON = Disable, OFF = Enable
(4) SW1.3 - Dehumidification:
ON = Use dehumidifier, OFF = Use reheat for dehumidification
(5) SW1.6 - Terminal 12 operation:
ON = Economizer OFF = Fan Medium (3 speeds) / Terminal not in use (2 speeds) Important: Economizer will not work in 3 fan speeds configuration.
See drawing for DIP switch and jumper locations (page 24).
Control - Fan on/off, Heat elements, Heat pump, Compressors, Economizer: 24 Vac, 0.5A max

Wiring and DIP switch/jumper configurations 5 to 7 - AC systems

OutputsConfig. 5: HC212/3 Speeds fan^(1) Config. 6: HP11Fan VFSConfig. 7: HC11Fan VFS
11Fan highXX
12Fan medium (or Economizer^(5) ) Economizer^(5) (option - SW1.6 ON) Economizer^(5) (option - SW1.6 ON)
13Fan lowXX
14Heat element 2 (2nd stage heat) Heat pump^(2) Heat element^(2)
15 Compressor^(3) Compressor^(3) Compressor^(3)
16Heat element 1^(2) (1st stage heat)Fan VFSFan VFS
SW3CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper configurations 5 to 7 - AC systems - 1CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper configurations 5 to 7 - AC systems - 2CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper configurations 5 to 7 - AC systems - 3
SW1
JumpersJP2, JP3 analog outputsW2

(1) SW3.1, SW3.2 - Fan speeds:
2 speeds (Low and High):
SW3.1 = OFF, SW3.2 = ON
3 speeds (Low, Med., and High):
SW3.1 = OFF, SW3.2 = OFF
(2) SW3.4 - HP (Heat pump): HC (not heat pump):
ON = Heat pump active in cool, OFF = Heat pump active in heat ON = Electrical heater, OFF = Oil/Gas heater (no fan)
(3) SW3.5 - Compressor delay:
ON = Disable, OFF = Enable
(4) SW1.3 - Dehumidification:
ON = Use dehumidifier, OFF = Use reheat for dehumidification
(5) SW1.6 - Terminal 12 operation:
ON = Economizer
OFF = Fan Medium (3 speeds) / Terminal not in use (2 speeds) Important: Economizer will not work in 3 fan speeds configuration.

See drawing for DIP switch and jumper locations (page 24).

Fan VFS: 0-10 Vdc, 0.5 mA Not isolated

Control - Fan on/off, Heat elements, Heat pump, Compressors, Economizer: 24 Vac, 0.5A max

Wiring and DIP switch/jumper configurations 8 to 9 - AC systems

OutputsConfig. 8: HC221 Speed fan, Economizer,Config. 9: HP321 Speed fan, Economizer
11Heat element 2(2nd stage heat)Heat element(3rd stage heat)
12Economizer(5)(option - SW1.6 ON)Economizer(5)(option - SW1.6 ON)
13Fan (1 speed)Fan (1 speed)
14Compressor 2Compressor 2
15Compressor 1(3)Compressor 1(3)
16Heat element 1(2)(1st stage heat)Heat pump(2)

SW3 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

SW1 1 2 3 4 5 6 1 2 3 4 5 6

Jumpers JP2, JP3 analog outputsW 2 JP2 1 3 3 1 JP3 JP2 1 3 3 1 JP3

(1) SW3.1, SW3.2 - Fan speeds:

2 speeds (Low and High):

SW3.1 = OFF, SW3.2 = ON

3 speeds (Low, Med., and High):

SW3.1 = OFF, SW3.2 = OFF

(2) SW3.4 - HP (Heat pump): HC (not heat pump):

ON = Heat pump active in cool, OFF = Heat pump active in heat ON = Electrical heater, OFF = Oil/Gas heater (no fan)

(3) SW3.5 - Compressor delay:

ON = Disable, OFF = Enable

(4) SW1.3 - Dehumidification:

ON = Use dehumidifier, OFF = Use reheat for dehumidification

(5) SW1.6 - Terminal 12 operation:

ON = Economizer OFF = Fan Medium (3 speeds) / Terminal not in use (2 speeds) Important: Economizer will not work in 3 fan speeds configuration.

See drawing for DIP switch and jumper locations (page 24).

Control - Fan on/off, Heat elements, Heat pump, Compressors, Economizer: 24 Vac, 0.5A max

Wiring and DIP switch/jumper configurations 10 to 13 - AC systems

w/wo Humidifier for humidification, with Reheat for dehumidification

OutputsConfig. 10: HC221 Speed fan, Humidifier, Reheat for DehumidificationConfig. 11: HP311 Speed fan, Humidifier, Reheat for DehumidificationConfig. 12: HC112/3 Speeds fan, Humidifier, Reheat for DehumidificationConfig. 13: HP212/3 Speeds fan, Reheat for Dehumidification
11Heat element 2(2nd stage heat)Heat element 2(2nd stage heat)Fan highFan high
12Heat element 1^(2) (1st stage heat)Heat element 1^(2) (2nd stage heat)Fan medium(or Economizer ^(5) )Fan medium(or Economizer ^(5) )
13Fan (1 speed)Fan (1 speed)Fan lowFan low
14Compressor 2Heat Pump ^(2) Heat element ^(2) Heat element ^(2) (2nd stage heat)
15Compressor 1^(3) Compressor ^(3) Compressor ^(3) Compressor ^(3)
16HumidifierHumidifierHumidifierHeat pump ^(2)

SW3

SW2

Jumpers

JP2, JP3

analog

outputs

(1) SW3.1, SW3.2 - Fan speeds: 2 speeds (Low and High): SW3.1 = OFF, SW3.2 = ON
3 speeds (Low, Med., and High): SW3.1 = OFF, SW3.2 = OFF

(2) SW3.4 – HP (Heat pump): ON = Heat pump active in cool, OFF = Heat pump active in heat HC (not heat pump): ON = Electrical heater, OFF = Oil/Gas heater (no fan)

(3) SW3.5 - Compressor delay: ON = Disable, OFF = Enable
(4) SW1.3 - Dehumidification: ON = Use dehumidifier, OFF = Use reheat for dehumidification

(5) SW1.6 - Terminal 12 operation: ON = Economizer OFF = Fan Medium (3 speeds) / Terminal not in use (2 speeds) Important: Economizer will not work in 3 fan speeds configuration.

See drawing for DIP switch and jumper locations (page 24).

Humidifier: 0-10VDC, 0.5mA Not isolated

Control - Fan on/of, Heat elements, Heat pump, Compressors, Economizer: 24VAC, 0.5A max.

Wiring and DIP switch configurations 16 to 19 - AC systems

with humidifier and Dehumidifier

OutputsConfig. 16:HC211 Speed fan, Humidifier, DehumidifierConfig. 17:HC111 Speed fan, Humidifier, DehumidifierConfig. 18:HP111 Speed fan, Humidifier, DehumidifierConfig. 19:1 Speed fan, Humidifier, Dehumidifier
11Heat element (2nd stage heat)Heat element(2)Heat pump(2)Heat pump(2)
12Heat element 1(2)(1st stage heat)Economizer(5)(option - SW1.6 ON)Economizer(5)(option - SW1.6 ON)Heat element (2nd stage heat)
13Fan (1 speed)Fan (1 speed)Fan (1 speed)Fan (1 speed)
14Compressor(3)Compressor(3)Compressor(3)Compressor(3)
15HumidifierHumidifierHumidifierHumidifier
16Dehumidifier(4)Dehumidifier(4)Dehumidifier(4)Dehumidifier(4)

SW3 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 SW1 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 Jumpers JP2, JP3 analog outputs JP2 JP3 JP2 JP3 JP2 JP3 JP2 JP3

(1) SW3.1, SW3.2 - Fan speeds:
2 speeds (Low and High): 3 speeds (Low, Med., and High):
SW3.1 = OFF, SW3.2 = ON
SW3.1 = OFF, SW3.2 = OFF
(2) SW3.4 - HP (Heat pump): HC (not heat pump):
ON = Heat pump active in cool, OFF = Heat pump active in heat ON = Electrical heater, OFF = Oil/Gas heater (no fan)
(3) SW3.5 - Compressor delay:
ON = Disable, OFF = Enable
(4) SW1.3 - Dehumidification:
ON = Use dehumidifier, OFF = Use reheat for dehumidification
(5) SW1.6 - Terminal 12 operation:
ON = Economizer OFF = Fan Medium (3 speeds) / Terminal not in use (2 speeds) Important: Economizer will not work in 3 fan speeds configuration.

See drawing for DIP switch and jumper locations (page 24).

Fan VFS, PID valves: 0-10 Vdc, 0.5 mA Not isolated

Control - Fan on/off, Heat elements, Cool/Heat valves, Economizer: 24 Vac, 0.5A max

Wiring and DIP switch/jumper configurations 20 to 23 - FC systems - 2-pipe

OutputsConfig. 20:2-Pipe, 1/2/3 Speeds fan^(1) Config. 21:2-Pipe, 1/2/3 Speeds fan^(1) , Cool/Heat PIDConfig. 22:2-Pipe, Fan VFSConfig. 23:2-Pipe, Fan VFS,Cool/Heat PID
11Fan highFan highXX
12Fan medium(or Economizer^(5) )Fan medium(or Economizer^(5) ) Economizer^(5) (option - SW1.6 ON) Economizer^(5) (option - SW1.6 ON)
13Fan lowFan lowXX
14 Heat element^(2) (2nd stage heat) Heat element^(2) (2nd stage heat) Heat element^(2) (2nd stage heat) Heat element^(2) (2nd stage heat)
15 Cool/heat valve^(3) Cool valve PID^(3) Cool/heat valve^(3) Cool valve PID^(3)
16XXFan VFSFan VFS

SW3 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

SW1 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6

Jumpers JP2, JP3 analog outputs

(1) SW3.1, SW3.2 = Fan speeds:
1 Speed (Low):
2 Speeds (Low and High):
3 Speeds (Low, Medium and High):
SW3.1 ON, SW3.2 OFF
SW3.1 OFF, SW3.2 ON
SW3.1 OFF, SW3.2 OFF
2) SW3.4 = 2nd heating stage:
ON - Enable
OFF - Disable
(3) SW3.5 = Chilled beam option:
ON - Enable chilled beam (fan will not run with cooling)
(4) SW1.3 = Dehumidification:
ON - Use dehumidifier
OFF - Use reheat for dehumidification
(5) SW1.6 = Terminal 12 operation:
ON - Economizer
OFF - Fan Med. (3 Speeds) / Terminal not in use (1/2 Speeds/VFS)
Important: Economizer will not work in 3 fan speeds configuration

See drawing for DIP switch and jumper locations (page 24).

Fan VFS, PID valves: 0-10 Vdc, 0.5 mA Not isolated

Control - Fan on/off, Heat elements, Cool/Heat valves, Economizer: 24 Vac, 0.5A max

Wiring and DIP switch/jumper configurations 24 to 27 - FC systems - 4-pipe

OutputsConfig. 24:4-Pipe, Fan VFSConfig. 25:4-Pipe, 1/2/3 Speeds fan^(1) , Heat valve PIDConfig. 26:4-Pipe, Fan VFS, Heat valve PIDConfig. 274-Pipe, Fan VFS, Cool valve PID
11Fan highFan highXX
12Fan medium(or Economizer^(5) )Fan medium(or Economizer^(5) ) Economizer^(5) (option - SW1.6 ON) Economizer^(5) (option - SW1.6 ON)
13Fan lowFan lowXX
14Heat element(2nd stage heat)Heat element(2nd stage heat)Heat element(2nd stage heat)Heat element(2nd stage heat)
15 Cool/Heat valve^(3) Cool/Heat valve PID^(3) Cool/Heat valve^(3) Cool/Heat valve PID^(3)
16HumidifierHumidifierFan VFSFan VFS

SW3 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

SW1 Jumpers JP2, JP3 analog outputs

(1) SW3.1, SW3.2 = Fan speeds:
1 Speed (Low):
2 Speeds (Low and High):
3 Speeds (Low, Medium and High):

SW3.1 ON, SW3.2 OFF

SW3.1 OFF, SW3.2 ON

SW3.1 OFF, SW3.2 OFF

2) SW3.4 = 2nd heating stage:

ON - Enable

OFF - Disable

(3) SW3.5 = Chilled beam option:

ON - Enable chilled beam (fan will not run with cooling)

(4) SW1.3 = Dehumidification:

ON - Use dehumidifier

OFF - Use reheat for dehumidification

(5) SW1.6 = Terminal 12 operation:

ON - Economizer

OFF - Fan Med. (3 Speeds) / Terminal not in use (1/2 Speeds/VFS)

Important: Economizer will not work in 3 fan speeds configuration

See drawing for DIP switch and jumper locations (page 24).

Fan VFS, PID valves: 0-10 Vdc, 0.5 mA Not isolated

Control - Fan on/off, Heat elements, Cool/Heat valves, Economizer: 24 Vac, 0.5A max

Wiring and DIP switch/jumper config 28 to 30 - FC systems - 4-pipe

with Dehumidifier, w/wo Humidifier

OutputsConfig. 28:4-Pipe, Fan VFSConfig. 29:4-Pipe, 1/2/3 Speeds fan^(1) , Heat valve PIDConfig. 30:4-Pipe, Fan VFS, Heat valve PID
11Fan highFan highX
12Fan medium(or Economizer^(5) )Fan medium(or Economizer^(5) ) Economizer^(5) (option - SW1.6 ON)
13Fan lowFan lowX
14Cool/Heat valve^(3) Heat element^(2) (2nd stage heat)Cool/Heat valve^(3)
15HumidifierCool/Heat valve PID ^(3) Fan VFS
16DehumidifierDehumidifier(4)(option - See SW1.3)Dehumidifier

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 28 to 30 - FC systems - 4-pipe - 1
(1) SW3.1, SW3.2 = Fan speeds:
1 Speed (Low):
SW3.1 ON, SW3.2 OFF
2 Speeds (Low and High):
SW3.1 OFF, SW3.2 ON
3 Speeds (Low, Medium and High):
SW3.1 OFF, SW3.2 OFF
2) SW3.4 = 2nd heating stage:
ON - Enable
OFF - Disable
(3) SW3.5 = Chilled beam option:
ON - Enable chilled beam (fan will not run with cooling)
(4) SW1.3 = Dehumidification:
ON - Use dehumidifier
OFF - Use reheat for dehumidification
(5) SW1.6 = Terminal 12 operation:
ON - Economizer
OFF - Fan Med. (3 Speeds) / Terminal not in use (1/2 Speeds/VFS)
Important: Economizer will not work in 3 fan speeds configuration

See drawing for DIP switch and jumper locations (page 24).

Fan VFS, PID valves, Hum., Dehum.: 0-10VDC, 0.5mA Not isolated

Control - Fan on/of, Heat elements, Cool/Heat valves, Economizer: 24VAC, 0.5A max.

Wiring and DIP switch/jumper config 31 to 34 - FC systems - 4-pipe

OutputsConfig. 31:4-Pipe, 1/2/3 Speeds fan(1)Config. 32:4-Pipe, 1/2/3 Speeds fan(1), Floor heatingConfig. 33:4-Pipe, 1/2/3 Speeds fan(1), Cool valve PIDConfig. 34:4-Pipe, 1/2/3 Speeds fan(1), Cool valve PID, Floor heating
11Fan highFan highFan highFan high
12Fan medium (or Economizer^(5) )Fan medium (or Economizer^(5) )Fan medium (or Economizer^(5) )Fan medium (or Economizer^(5) )
13Fan lowFan lowFan lowFan low
14 Heat element^(2) (2nd stage heat)Floor heating (1st stage heat-no fan) Heat element^(2) (2nd stage heat)Floor heating (1st stage heat-no fan)
15 Cool valve^(3) Cool valve^(3) Cool valve PID^(3) Cool valve PID^(3)
16Heat valve (1st stage heat)Heat valve (2nd stage heat)Heat valve (1st stage heat)Heat valve (2nd stage heat)

SW3 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

SW1 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6

Jumpers JP2, JP3 analog outputs JP2 1 1 JP3 3 3 3 JP2 1 1 JP3 3 3 JP2 1 1 JP3 3 3 JP2 1 1 JP3 3 3

(1) SW3.1, SW3.2 = Fan speeds:
1 Speed (Low):
SW3.1 ON, SW3.2 OFF
2 Speeds (Low and High):
SW3.1 OFF, SW3.2 ON
3 Speeds (Low, Medium and High):
SW3.1 OFF, SW3.2 OFF
^2) SW3.4 = 2nd heating stage:
ON - Enable
OFF - Disable
(3) SW3.5 = Chilled beam option:
ON - Enable chilled beam (fan will not run with cooling)
(4) SW1.3 = Dehumidification:
ON - Use dehumidifier
OFF - Use reheat for dehumidification
(5) SW1.6 = Terminal 12 operation:
ON - Economizer
OFF - Fan Med. (3 Speeds) / Terminal not in use (1/2 Speeds/VFS)
Important: Economizer will not work in 3 fan speeds configuration

See drawing for DIP switch and jumper locations (page 24).

Fan VFS, PID valves: 0-10VDC, 0.5mA Not isolated

Control - Fan on/of, Heat elements, Cool/Heat valves, Economizer: 24VAC, 0.5A max.

Wiring and DIP switch/jumper config 35 to 38 - FC systems - 4-pipe

OutputsConfig. 35:4-Pipe, Fan VFSConfig. 36:4-Pipe, 1/2/3 Speeds fan(1), Heat valve PIDConfig. 37:4-Pipe, Fan VFS, Heat valve PIDConfig. 38:4-Pipe, Fan VFS, Cool valve PID
11XFan highXX
12Economizer ^(5) (option - SW1.6 ON)Fan medium (or Economizer ^(5) )Economizer ^(5) (option - SW1.6 ON)Economizer ^(5) (option - SW1.6 ON)
13XFan lowXX
14Heat valveHeat element ^(2) (2nd stage heat)Cool valve ^(3) Heat valve
15Cool valve ^(3) Cool valve ^(3) Heat valve PIDCool valve PID ^(3)
16Fan VFSHeat valve PID(1st stage heat)Fan VFSFan VFS

SW3 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

SW1 Jumpers JP2, JP3 analog outputs

(1) SW3.1, SW3.2 = Fan speeds:
1 Speed (Low):
2 Speeds (Low and High):
3 Speeds (Low, Medium and High):
SW3.1 ON, SW3.2 OFF
SW3.1 OFF, SW3.2 ON
SW3.1 OFF, SW3.2 OFF
2) SW3.4 = 2nd heating stage:
ON - Enable
OFF - Disable
(3) SW3.5 = Chilled beam option:
ON - Enable chilled beam (fan will not run with cooling)
(4) SW1.3 = Dehumidification:
ON - Use dehumidifier
OFF - Use reheat for dehumidification
(5) SW1.6 = Terminal 12 operation:
ON - Economizer
OFF - Fan Med. (3 Speeds) / Terminal not in use (1/2 Speeds/VFS)
Important: Economizer will not work in 3 fan speeds configuration

See drawing for DIP switch and jumper locations (page 24).

Fan VFS, PID valves: 0-10VDC, 0.5mA Not isolated

Control - Fan on/of, Heat elements, Cool/Heat valves, Economizer: 24VAC, 0.5A max.

Wiring and DIP switch/jumper configuration 39 - FC systems - 4-pipe

OutputsConfig. 39:4-Pipe, 1/2/3 Speeds fan(1), Heat valve PID, Cool valve PID
11Fan high
12Fan medium (or Economizer ^(5) )
13Fan low
14Heat element ^(2) (2nd stage heat)
15Cool valve PID ^(3)
16Heat valve PID(1st stage heat)

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper configuration 39 - FC systems - 4-pipe - 1

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper configuration 39 - FC systems - 4-pipe - 2

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper configuration 39 - FC systems - 4-pipe - 3

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper configuration 39 - FC systems - 4-pipe - 4

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper configuration 39 - FC systems - 4-pipe - 5

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper configuration 39 - FC systems - 4-pipe - 6

(1) SW3.1, SW3.2 = Fan speeds:

1 Speed (Low): SW3.1 ON, SW3.2 OFF
2 Speeds (Low and High): SW3.1 OFF, SW3.2 ON
3 Speeds (Low, Medium and High): SW3.1 OFF, SW3.2 OFF

2) SW3.4 = 2nd heating stage:

ON - Enable OFF - Disable

(3) SW3.5 = Chilled beam option:

ON - Enable chilled beam (fan will not run with cooling)

(4) SW1.3 = Dehumidification:

ON - Use dehumidifier OFF - Use reheat for dehumidification

(5) SW1.6 = Terminal 12 operation:

ON – Economizer OFF – Fan Med. (3 Speeds) / Terminal not in use (1/2 Speeds/VFS) Important: Economizer will not work in 3 fan speeds configuration

See drawing for DIP switch and jumper locations (page 24).

PID valves: 0-10VDC, 0.5mA Not isolated

Control - Fan on/of, Heat elements, Cool/Heat valves, Economizer: 24VAC, 0.5A max.

Wiring and DIP switch/jumper config 40 to 41 - FC systems - 4-pipe

with Reheat for dehumidification, without Humidifier

OutputsConfig. 40:4-Pipe, 1/2/3 Speeds fan(1), Heat valve PIDConfig. 41:4-Pipe, Fan VFS, Cool valve PID
11Fan highFan high
12Fan medium (or Economizer^(5) )Fan medium (or Economizer^(5) )
13Fan lowFan low
14 Heat element^(2) (2nd stage heat) Heat element^(2) (2nd stage heat)
15 Cool valve^(3) Cool valve PID^(3)
16Heat valveHeat valve

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 40 to 41 - FC systems - 4-pipe - 1
(1) SW3.1, SW3.2 = Fan speeds:

1 Speed (Low): SW3.1 ON, SW3.2 OFF

2 Speeds (Low and High): SW3.1 OFF, SW3.2 ON

3 Speeds (Low, Medium and High): SW3.1 OFF, SW3.2 OFF

^2) SW3.4 = 2nd heating stage:

ON - Enable

OFF - Disable

(3) SW3.5 = Chilled beam option:

ON - Enable chilled beam (fan will not run with cooling)

(4) SW1.3 = Dehumidification:

ON - Use dehumidifier

OFF - Use reheat for dehumidification

(5) SW1.6 = Terminal 12 operation:

ON - Economizer

OFF - Fan Med. (3 Speeds) / Terminal not in use (1/2 Speeds/VFS)

Important: Economizer will not work in 3 fan speeds configuration

See drawing for DIP switch and jumper locations (page 24).

PID valves: 0-10VDC, 0.5mA Not isolated

Control - Fan on/of, Heat elements, Cool/Heat valves, Economizer: 24VAC, 0.5A max.

Wiring and DIP switch/jumper config 42 to 44 - FC systems - 4-pipe

with Humidifier, without Reheat for dehumidification

OutputsConfig. 42:4-Pipe, 1/2/3 Speeds fan^(1) , HumidifierConfig. 43:4-Pipe, 1/2/3 Speeds fan^(1) , Cool valve PID, HumidifierConfig. 44:4-Pipe, 1/2/3 Speeds fan^(1) , Heat valve PID, Humidifier
11Fan highFan highFan high
12Fan medium (or Economizer^(5) )Fan medium (or Economizer^(5) )Fan medium (or Economizer^(5) )
13Fan lowFan lowFan low
14Heat valveHeat valve Cool valve^(3)
15 Cool valve^(3) Cool valve PID^(3) Heat valve PID
16HumidifierHumidifierHumidifier
Outputs
11
12
13
14
15
16
Config. 42:4-Plpe, 1/2/3 Speeds fan(1), Humidifier
Fan high
Fan medium (or Economizer(5))
Fan low
Heat valve
Cool valve(3)
Humidifier
Config. 43:4-Pipe, 1/2/3 Speeds fan(1), Cool valve PID, Humidifier
Fan high
Fan medium (or Economizer(5))
Fan low
Heat valve
Cool valve PID(3)
Humidifier
Config. 44:4-Pipe, 1/2/3 Speeds fan(1), Heat valve PID, Humidifier
Fan high
Fan medium (or Economizer(5))
Fan low
Cool valve(3)
Heat valve PID
Humidifier
SW3

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 42 to 44 - FC systems - 4-pipe - 1

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 42 to 44 - FC systems - 4-pipe - 2

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 42 to 44 - FC systems - 4-pipe - 3

SW1

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 42 to 44 - FC systems - 4-pipe - 4

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 42 to 44 - FC systems - 4-pipe - 5

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 42 to 44 - FC systems - 4-pipe - 6

Jumpers
JP2, JP3 analog outputs

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 42 to 44 - FC systems - 4-pipe - 7

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 42 to 44 - FC systems - 4-pipe - 8

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 42 to 44 - FC systems - 4-pipe - 9
(1) SW3.1, SW3.2 = Fan speeds:
1 Speed (Low):
SW3.1 ON, SW3.2 OFF
2 Speeds (Low and High):
SW3.1 OFF, SW3.2 ON
3 Speeds (Low, Medium and High):
SW3.1 OFF, SW3.2 OFF
^2) SW3.4 = 2nd heating stage:
ON - Enable
OFF - Disable
(3) SW3.5 = Chilled beam option:
ON - Enable chilled beam (fan will not run with cooling)
(4) SW1.3 = Dehumidification:
ON - Use dehumidifier
OFF - Use reheat for dehumidification
(5) SW1.6 = Terminal 12 operation:
ON - Economizer
OFF - Fan Med. (3 Speeds) / Terminal not in use (1/2 Speeds/VFS)
Important: Economizer will not work in 3 fan speeds configuration

See drawing for DIP switch and jumper locations (page 24).

PID valves, Humidifier: 0-10VDC, 0.5mA Not isolated

Control - Fan on/of, Heat elements, Cool/Heat valves, Economizer: 24VAC, 0.5A max.

Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe

with Dehumidifier

OutputsConfig. 45:4-Pipe, 1/2/3 Speeds fan^(1) , DehumidifierConfig. 46:4-Pipe, 1/2/3 Speeds fan^(1) , Cool valve PID, DehumidifierConfig. 47:4-Pipe, 1/2/3 Speeds fan^(1) , Heat valve PID, Dehumidifier
11Fan highFan highFan high
12Fan medium (or Economizer^(5) )Fan medium (or Economizer^(5) )Fan medium (or Economizer^(5) )
13Fan lowFan lowFan low
14Heat valveHeat valve Cool valve^(3)
15 Cool valve^(3) Cool valve PID^(3) Heat valve PID
16DehumidifierDehumidifierDehumidifier

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe - 1

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe - 2

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe - 3

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe - 4

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe - 5

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe - 6

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe - 7

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe - 8

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe - 9

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe - 10

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe - 11

CARRIER ComfortVu BACnet TB-24-C - Wiring and DIP switch/jumper config 45 to 47 - FC systems - 4-pipe - 12
(1) SW3.1, SW3.2 = Fan speeds:
1 Speed (Low):
SW3.1 ON, SW3.2 OFF
2 Speeds (Low and High):
SW3.1 OFF, SW3.2 ON
3 Speeds (Low, Medium and High):
SW3.1 OFF, SW3.2 OFF
2) SW3.4 = 2nd heating stage:
ON - Enable
OFF - Disable
(3) SW3.5 = Chilled beam option:
ON - Enable chilled beam (fan will not run with cooling)
(4) SW1.3 = Dehumidification:
ON - Use dehumidifier
OFF - Use reheat for dehumidification
(5) SW1.6 = Terminal 12 operation:
ON - Economizer
OFF - Fan Med. (3 Speeds) / Terminal not in use (1/2 Speeds/VFS)
Important: Economizer will not work in 3 fan speeds configuration

See drawing for DIP switch and jumper locations (page 24).

PID valves, Humidifier: 0-10VDC, 0.5mA Not isolated

Control - Fan on/of, Heat elements, Cool/Heat valves, Economizer: 24VAC, 0.5A max.

Technician Settings

Enter Technician Settings mode:

1 Adjust the setpoint temperature to 10^ C or 50^ F.
2 Press and hold the [C/F] button for 10 seconds to enter Technician Settings mode. "P01" will appear on the display.

View objects and make adjustments:

• Use the [Mode] button to step forward between different settings.
• Use the [Fan] button to step backward between different settings.
- Press the [On/Off] button to exit Technician Settings and return to normal display.
- If no button is pressed for 60 seconds, the thermostat will automatically exit Technician Settings and return to normal display.
- Use the [+] or [-] button to make adjustments when required.

Technician Settings P01 to P03

P01 - Offset for temperature readings calibration

Range: -6...+6°C / -9...+9°F.

Default: 0^ C / 0^ F.

Note: The offset will influence both internal or external sensors.

CARRIER ComfortVu BACnet TB-24-C - P01 - Offset for temperature readings calibration - 1

CARRIER ComfortVu BACnet TB-24-C - P01 - Offset for temperature readings calibration - 2

Offset for temperature calibration

(°C)

(°F)

P02 - Setpoint limit for cooling

Range: 5...35°C / 41...95°F.

Default: 10^ C / 50^ F.

Note: The thermostat will stop cooling regardless of the user's setpoint

CARRIER ComfortVu BACnet TB-24-C - P02 - Setpoint limit for cooling - 1

CARRIER ComfortVu BACnet TB-24-C - P02 - Setpoint limit for cooling - 2

Set point limit for cooling

(°C)

(°F)

P03 - Setpoint limit for heating

Range: 5...35°C / 41...95°F.

Default: 30^ C / 86^ F.

Note: The thermostat will stop heating regardless of the user's setpoint

CARRIER ComfortVu BACnet TB-24-C - P03 - Setpoint limit for heating - 1

CARRIER ComfortVu BACnet TB-24-C - P03 - Setpoint limit for heating - 2

Setpoint limit for heating

(°C)

(°F)

Technician Settings P04 to P07

P04 - Enable/Disable the option to lock the [Fan] button

“LF” + ” [Fan] button can be lockedLP P04LP P04
“LF” only[Fan] button cannot be locked[Fan] Can be locked[Fan] Cannot be locked

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P04 to P07 - 1

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P04 to P07 - 2

P05 - Enable/Disable the option to lock the [Mode] button

“L1” + ”[Mode] button can be locked
“L1” only [Mode] button cannot be locked
Note: When enabled, press and hold [-] and [Fan] buttons for 7 seconds to unlock or relock the buttons.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P04 to P07 - 3

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P04 to P07 - 4

P06 - Enable/Disable the option to lock the [On/Off] button

“LO” + ”[On/Off] button can be locked
“00” only[On/Off] button cannot be locked
Note: When enabled, press and hold both [-] and [Fan] buttons for 7 seconds to unlock or relock the buttons.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P04 to P07 - 5

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P04 to P07 - 6

P07 - Enable/Disable the option to lock the ▲ or ▼ button (SET)

“LS” + ”[+] or [-] button can be locked
“LS” only[+] or [-] button cannot be locked
Note: When enabled, press and hold both [-] and [Fan] buttons for 7 seconds to unlock or relock the buttons.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P04 to P07 - 7

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P04 to P07 - 8

P04-P07 Note:

When the option to lock one or more buttons is enabled, these buttons will be automatically locked when leaving technician settings and returning to normal display.

In normal display, press and hold the [Mode] button for 7 seconds to unlock/relock these buttons.

Technician Settings P08 to P10

P08 - Functionality of T1 terminals

"00" - T1 terminals are not in use
"01" - External sensor
"02"- T3 Soft start in heat sensor (FC) * or De-icing in cool (AC) **
"03" - Door switch
"04" - Key tag
"05" - T Economizer(DIP switch SW2.6 must be ON)
* In heating mode, the fan will not start before there is hot water in the coil.
Note: To view T3 on the BACnet Thermostat, see Technician Settings P84.
** Allow de-icing operation of indoor coil in cooling.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 1
T1 terminals Not in use

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 2
T1 sensor (External sensor)

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 3
T3 Soft start in heat sensor (FC) or De-icing in cool sensor (AC)

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 4
Door switch

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 5
Key tag

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 6
T Economizer

P09 - Functionality of IN1,0 terminals

"00" - IN1,0 terminals are not in use
"01" - *T2 (Change over sensor) (FC) or De-icing in heat (AC)
"02" - **T3 (Soft start in heat sensor) (FC) or De-icing in cool (AC)
"03" -Window contact - Remote On/Off switch
"04" -Window contact - Remote Economy switch
"05" - ***External Passive Infrared detector
* In 2-Pipe system, T2 will sense the water temperature in the pipe in order to select/allow effective system mode.
Note: To view T2 on the BACnet Thermostat, see Technician Settings P83.
** Where T1 terminals are used for external sensor, the IN1,0 terminals can be used for T3 sensor.
Note: To view T3 on the BACnet Thermostat, see Technician Settings P84.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 7
"IN1,0" terminals Not in use

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 8
T2 change over sensor (FC) or Deicing in heat (AC)

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 9
**T3 Soft start in heat sensor (FC) or Deicing in cool sensor (AC)

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 10
Window contact Remote On/Off switch

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 11
Window contact Remote Economy switch

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 12
External PIR sensor

P10 - Window contact (terminals IN1,0) polarity

"01" - Normally open
"00" - Normally closed

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 13
Window contact Normally close

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P08 to P10 - 14
Window contact Normally open

Technician Settings P11 to P15

P11 - Window contact delay time

Range: 0...999 seconds.

Default: 600 seconds.

CARRIER ComfortVu BACnet TB-24-C - P11 - Window contact delay time - 1

Window contact delay time (sec.)

P12 - Door switch (terminals T1,0) polarity

"01" - Normally open

"00" - Normally closed

CARRIER ComfortVu BACnet TB-24-C - P12 - Door switch (terminals T1,0) polarity - 1

Door switch Normally close

CARRIER ComfortVu BACnet TB-24-C - P12 - Door switch (terminals T1,0) polarity - 2

Door switch Normally open

P13 - Door switch delay time

Range: 0...999 seconds.

Default: 180 seconds.

CARRIER ComfortVu BACnet TB-24-C - P13 - Door switch delay time - 1

Door switch delay time (sec.)

P14 - Enable/Disable Auto change over mode

"00" - Disable Auto change over mode

"01" - Enable Auto change over mode

CARRIER ComfortVu BACnet TB-24-C - P14 - Enable/Disable Auto change over mode - 1

Disable Auto mode

CARRIER ComfortVu BACnet TB-24-C - P14 - Enable/Disable Auto change over mode - 2

Enable Auto mode

P15 - Motion sensor logic (PIR)

"00" - Thermostat turns off when unoccupied and back on when re-occupied.

"01" - Thermostat turns off when unoccupied and remains off when re-occupied.

"02" - Thermostat uses economy setpoints when unoccupied.

CARRIER ComfortVu BACnet TB-24-C - P15 - Motion sensor logic (PIR) - 1

Unocc. - Off Re-occ. - On

CARRIER ComfortVu BACnet TB-24-C - P15 - Motion sensor logic (PIR) - 2

Unocc. - Off Re-occ. - Off

CARRIER ComfortVu BACnet TB-24-C - P15 - Motion sensor logic (PIR) - 3

Economy set points

Technician Settings P16 to P25

P16 - Enable/Disable Motion sensor

"00" - Disable

"01" - Enable

CARRIER ComfortVu BACnet TB-24-C - P16 - Enable/Disable Motion sensor - 1
Disable occ. sensor

CARRIER ComfortVu BACnet TB-24-C - P16 - Enable/Disable Motion sensor - 2
Enable occ. sensor

P17 - PIR (Motion sensor) delay time before switching to unoccupied mode (ON delay)

Range: 0...900 minutes

Default: 20 minutes

CARRIER ComfortVu BACnet TB-24-C - P17 - PIR (Motion sensor) delay time before switching to unoccupied mode (ON delay) - 1
PIR ON delay (minutes)

P18 - Door switch or key tag configuration

"00" - Switch On/Off by door switch or key tag

"01" - Changing the setpoint temperature

"02" - Switching fan speed to Low

CARRIER ComfortVu BACnet TB-24-C - P18 - Door switch or key tag configuration - 1
Switch On or Off

CARRIER ComfortVu BACnet TB-24-C - P18 - Door switch or key tag configuration - 2
Change set-points

CARRIER ComfortVu BACnet TB-24-C - P18 - Door switch or key tag configuration - 3
Switch to fan low

P19 - PIR (Motion sensor) polarity

"00" - Normally open

"01" - Normally closed

CARRIER ComfortVu BACnet TB-24-C - P19 - PIR (Motion sensor) polarity - 1
PIR PIR Normally open Normally close

CARRIER ComfortVu BACnet TB-24-C - P19 - PIR (Motion sensor) polarity - 2
PIR Normally close

P25 - Economy setpoint for cooling

Range: 5...35°C / 41...95°F

Default: 30°C / 86°F

CARRIER ComfortVu BACnet TB-24-C - P25 - Economy setpoint for cooling - 1

EC set point in cooling (°C) (°F)
CARRIER ComfortVu BACnet TB-24-C - P25 - Economy setpoint for cooling - 2
(°F)

Technician Settings P26 to P30

P26 - Economy setpoint for heating

Range: 5...35°C / 41...95°F

Default: 10^ / 50^

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P26 to P30 - 1
EC set point in heating (°C) (°F)

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P26 to P30 - 2
(°F)

P27 - On-delay time on-delay between heating stages

Range: 0....600 seconds

Default: 5 seconds

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P26 to P30 - 3
On delay heating stages

P28 - Off-delay time between heating stages

Range: 0....600 seconds

Default: 1 second

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P26 to P30 - 4
Off delay heating stages

P29 - LCD Backlight ON or OFF

"00" - LCD Backlight ON

"01" - LCD Backlight OFF

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P26 to P30 - 5
Backlight ON

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P26 to P30 - 6
Backlight OFF

P30 - Beeper ON or OFF

"01" - Beeper ON

"00" - Beeper OFF

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P26 to P30 - 7
Beeper ON

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P26 to P30 - 8
Beeper OFF

Technician Settings P31 to P34

P31 - P34

Fan on/off delay

with fan on demand (auto fan) active.

CARRIER ComfortVu BACnet TB-24-C - P31 - P34 - 1

CARRIER ComfortVu BACnet TB-24-C - P31 - P34 - 2

flowchart
graph TD
    A["ON"] --> B["Fan ON delay"]
    B --> C["OFF"]
    C --> D["Fan OFF delay"]
    D --> E["Time (sec.)"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#ffc,stroke:#333

P31 - Fan ON delay in cooling (FC only)

Range: 0...120 seconds

Default: 0 seconds (no delay)

CARRIER ComfortVu BACnet TB-24-C - P31 - Fan ON delay in cooling (FC only) - 1

P32 - Fan OFF delay in cooling

Range: 0...120 seconds

Default: 0 seconds (no delay)

CARRIER ComfortVu BACnet TB-24-C - P32 - Fan OFF delay in cooling - 1

P33 - Fan ON delay in heating (FC only)

Range: 0...120 seconds

Default: 0 seconds (no delay)

CARRIER ComfortVu BACnet TB-24-C - P33 - Fan ON delay in heating (FC only) - 1

P34 - Fan OFF delay in heating

Range: 0...120 seconds

Default: 30 seconds

CARRIER ComfortVu BACnet TB-24-C - P34 - Fan OFF delay in heating - 1

Technician Settings P35 to P42

P35 - Enable/Disable Freeze protection

"00" - Disable Freeze protection

"01" - Enable Freeze protection

Note: If enabled, freeze protection will start when the thermostat is either ON or OFF and regardless of the current system mode.

CARRIER ComfortVu BACnet TB-24-C - P35 - Enable/Disable Freeze protection - 1
Disable freeze protection

CARRIER ComfortVu BACnet TB-24-C - P35 - Enable/Disable Freeze protection - 2
Enable freeze protection

P36 - Freeze protection cut-in setpoint

Range: 8...15°C / 46...59°F

Default: 8^ C / 46^ F

The room ambient temperature which will trigger Heating ON.

CARRIER ComfortVu BACnet TB-24-C - P36 - Freeze protection cut-in setpoint - 1

Range: 10...17°C / 50...63°F

Default: 10°C / 50°F

The room ambient temperature which will switch the Heating back OFF.

CARRIER ComfortVu BACnet TB-24-C - P36 - Freeze protection cut-in setpoint - 2

Freeze protection cut-out set point (°C) (°F)
CARRIER ComfortVu BACnet TB-24-C - P36 - Freeze protection cut-in setpoint - 3
(°F)

P40 - View filter counter (hours) - Read only

Range: 0...999 hours

The filter counter is related to Fan running time.

CARRIER ComfortVu BACnet TB-24-C - P40 - View filter counter (hours) - Read only - 1
View filter Counter (hours)

P41 - Reset filter time

Press the [+] button to reset the filter counter.

The display will change from "00" to "01" and back to "00".

CARRIER ComfortVu BACnet TB-24-C - P41 - Reset filter time - 1

CARRIER ComfortVu BACnet TB-24-C - P41 - Reset filter time - 2
Reset filter counter

P42 - Adjust filter alarm delay time counter (hours)

Range: 0...999 hours

Default: 0 hours (0 = Disable)

CARRIER ComfortVu BACnet TB-24-C - P42 - Adjust filter alarm delay time counter (hours) - 1
Adjust filter alarm delay time (hours)

Technician Settings P43 to P44

P43 - P44

Soft start in heat

with fan on demand (auto fan) active.

CARRIER ComfortVu BACnet TB-24-C - P43 - P44 - 1

ON OFF T3 Temp. Fan cut-out temperature Fan cut-in temperature

P43 - Soft start in heat - cut-in temperature (FC only)

The fan will not start before the temperature on T3 sensor reaches the cut-in temperature.

See Technician Settings P08/P09.

Range: 14...37°C / 57...99°F

Default: 36°C / 97°F

36 P43 97. P43 Soft start heat cut-in temperature (°C) (°F)

P44 - Soft start in heat - cut-out temperature (FC only)

The fan will stop if the temperature on T3 sensor drops below the cut-out temperature.

See Technician Settings P08/P09.

Range: 12...35°C / 54...95°F

Default: 32°C / 90°F

32 P44 90 P44 Soft start heat cut-out temperature (°C) (°F)

Technician Settings P45 to P46

P45 - P46

Cool differential band / offset

(with cool differential band offset = 0)

— Compressor / Valve

ON OFF Setpoint Cool differential band Room Temp.

P45 - P46

Cool differential band / offset

(with cool differential band offset ≠ 0)

— Compressor / Valve

ON OFF Setpoint Room Temp. Cool differential band Offset

P45 - Cool differential band

Range: 0.5...5°C / 1...10°F

Default: 1°C / 2°F

0.1 P45 Cool differential band (°C) 0.2 P45 (°F)

P46 - Cool differential band offset

Range: -5...+5°C / -9...+9°F

Default: 0^ C / 0^ F

00.0 P46 Cool differential band offset (°C) 00.0 P46 (°F)

Technician Settings P47 to P48

P47-48

Heat differential band / offset

(with heat differential band offset = 0)

CARRIER ComfortVu BACnet TB-24-C - P47-48 - 1

Compressor / Valve

Room Temp. Setpoint Heat differential band ON OFF

P47-48

Heat differential band / offset

(with heat differential band offset 0 )

CARRIER ComfortVu BACnet TB-24-C - P47-48 - 1

Compressor / Valve

Room Temp. Setpoint ON OFF Heat differential band Offset

P47 - Heat differential band

Range: 0.5...5°C / 1...10°F

Default: 1°C / 2°F

CARRIER ComfortVu BACnet TB-24-C - P47 - Heat differential band - 1
(°C)

Heat differential band
CARRIER ComfortVu BACnet TB-24-C - P47 - Heat differential band - 2
(°F)

P48 - Heat differential band offset

Range: -5...+5°C / -9...+9°F

Default: 0^ C / 0^ F

CARRIER ComfortVu BACnet TB-24-C - P48 - Heat differential band offset - 1
Heat differential band offset
(°C)

CARRIER ComfortVu BACnet TB-24-C - P48 - Heat differential band offset - 2
(°F)

Technician Settings P49 to P51

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P49 to P51 - 1

P49 - Shift between Cool and Heat in Auto change over mode

Range: 0...10°C / 0...20°F

Default: 2°C / 4°F

CARRIER ComfortVu BACnet TB-24-C - P49 - Shift between Cool and Heat in Auto change over mode - 1

CARRIER ComfortVu BACnet TB-24-C - P49 - Shift between Cool and Heat in Auto change over mode - 2
Shift between Cool & Heat in Auto mode
(°C)
(°F)

P50 - Shift between Cooling stages (AC only)

Range: 0...10°C / 0...20°F

Default: 2^ / 4^

CARRIER ComfortVu BACnet TB-24-C - P50 - Shift between Cooling stages (AC only) - 1

CARRIER ComfortVu BACnet TB-24-C - P50 - Shift between Cooling stages (AC only) - 2
Shift between cooling stages
(°C)
(°F)

P51 - Shift between Heating stages

Range: 0...49°C / 0...98°F

Default: 2^ / 4^

CARRIER ComfortVu BACnet TB-24-C - P51 - Shift between Heating stages - 1

CARRIER ComfortVu BACnet TB-24-C - P51 - Shift between Heating stages - 2
Shift between heating stages
(°C)
(°F)

Technician Settings P52 to P57

P52 - Cool valve proportional band (FC only)

Range: 2...10°C / 4...20°F

Default: 2°C / 4°F

0-10V Valve opening from fully closed to fully open.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P52 to P57 - 1

Cool valve proportional band (°C) (°F)
CARRIER ComfortVu BACnet TB-24-C - Technician Settings P52 to P57 - 2
(°F)

P53 - Cool proportional low limit (FC only)

Range: 0...100%

Default: 0%

Minimum valve opening.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P52 to P57 - 3
Cool prop. low limit (%)

P54 - Cool proportional high limit (FC only)

Range: 0...100%

Default: 100%

Maximum valve opening.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P52 to P57 - 4
Cool prop. high limit (%)

P55 - Heat valve proportional band (FC only)

Range: 2...10°C / 4...20°F

Default: 2°C / 4°F

0-10V Valve opening from fully closed to fully open.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P52 to P57 - 5

Cool valve proportional band (°C) (°F)
CARRIER ComfortVu BACnet TB-24-C - Technician Settings P52 to P57 - 6
(°F)

P56 - Heat proportional low limit (FC only)

Range: 0...100%

Default: 0%

Minimum valve opening.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P52 to P57 - 7
Heat prop. low limit (%)

P57 - Heat proportional high limit (FC only)

Range: 0...100%

Default: 100%

Maximum valve opening.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P52 to P57 - 8
Heat prop. high limit (%)

Technician Settings P60 to P64

P60

Fan turns ON when the Cool or Heat valve reaches the "Proportional ON percent"

P61

Fan turns OFF when the Cool or Heat valve drops below the "Proportional OFF percent"

CARRIER ComfortVu BACnet TB-24-C - P61 - 1

line | Cool/Heat Valve % | Fan OFF | Fan ON | |---|---|---| | 10 | 0 | 0 | | 30 | 0 | 1 | | 50 | 0 | 1 | The chart displays a stepwise increasing trend for Fan OFF from 0 to 1 as Cool/Heat Valve increases from 10% to 30%, indicating a threshold behavior where higher proportions of the valve increase proportionally. The legend also includes symbols: a star (on) and an asterisk (*) (on).

P60 - Proportional ON percent (FC only)

Range: 0...30%

Default: 30%

CARRIER ComfortVu BACnet TB-24-C - P60 - Proportional ON percent (FC only) - 1
Proportional ON percent (%)

P61 - Proportional OFF percent (FC only)

Range: 0...100%

Default: 100%

CARRIER ComfortVu BACnet TB-24-C - P61 - Proportional OFF percent (FC only) - 1
Proportional OFF percent (%)

P63 - Time on-delay between cooling stages (AC only)

Range: 0...600 seconds

Default: 5 seconds

CARRIER ComfortVu BACnet TB-24-C - P63 - Time on-delay between cooling stages (AC only) - 1
On Delay cooling stages

P64 - Time off-delay between cooling stages (AC only)

Range: 0...600 seconds

Default: 1 seconds

CARRIER ComfortVu BACnet TB-24-C - P64 - Time off-delay between cooling stages (AC only) - 1
Off Delay cooling stages

Technician Settings P65 to P70

P65 - Fan VFS proportional band in cooling

Range: 2...10°C / 4...20°F

Default: 2°C / 4°F

0-10V fan speed from off closed to fully running.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P65 to P70 - 1

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P65 to P70 - 2

VFS Proportional band in cooling

(°C)

(°F)

P66 - Fan VFS proportional band in heating

Range: 2...10°C / 4...20°F

Default: 2°C / 4°F

0-10V fan speed from off closed to fully running.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P65 to P70 - 3

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P65 to P70 - 4

VFS Proportional band in heating

(°C)

(°F)

P67 - Fan VFS Low speed percent in cooling

Range: 0...30%

Default: 20%

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P65 to P70 - 5

VFS Low % in cooling

P68 - Fan VFS Medium speed percent in cooling

Range: 30...60%

Default: 50%

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P65 to P70 - 6

VFS Med % in cooling

P69 - Fan VFS High speed percent in cooling

Range: 60...100%

Default: 90%

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P65 to P70 - 7

VFS High % in cooling

P70 - Fan VFS Low speed percent in heating

Range: 0...30%

Default: 30%

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P65 to P70 - 8

VFS Low % in heating

Technician Settings P71 to P75

P71 - Fan VFS Medium speed percent in heating

Range: 30...60%

Default: 50%

CARRIER ComfortVu BACnet TB-24-C - P71 - Fan VFS Medium speed percent in heating - 1

VFS Med % in heating

P72 - Fan VFS High speed percent in heating

Range: 60...100%

Default: 80%

CARRIER ComfortVu BACnet TB-24-C - P72 - Fan VFS High speed percent in heating - 1

VFS High % in heating

P74

VFS Medium speed differential (display from medium to low)

P75

VFS High speed differential (display from high to medium)

CARRIER ComfortVu BACnet TB-24-C - P75 - 1

line | VFS % In cooling | Low speed percent In cooling | Medium speed percent In cooling | High speed percent in cooling | | ---------------- | ----------------------------- | -------------------------------- | ------------------------------ | | 0 | 0 | 0 | 0 | | 20% | 20% | 20% | 20% | | 50% | 50% | 50% | 50% | | 90% | 90% | 90% | 90% |

P74 - VFS Medium speed differential

Range: 10...50%

Default: 35

CARRIER ComfortVu BACnet TB-24-C - P74 - VFS Medium speed differential - 1

VFS Med speed differential

P75 - VFS High speed differential

Range: 10...50%

Default: 35

CARRIER ComfortVu BACnet TB-24-C - P75 - VFS High speed differential - 1

VFS High speed differential

Technician Settings P76 to P79

P76 - Fan VFS Low limit in cooling

Range: 0...100%

Default: 0%

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P76 to P79 - 1

VFS low limit in cooling

P77 - Fan VFS High limit in cooling

Range: 0...100%

Default: 100%

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P76 to P79 - 2

VFS high limit in cooling

P78 - Fan VFS Low limit in heating

Range: 0...100%

Default: 0%

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P76 to P79 - 3

VFS low limit in heating

P79 - Fan VFS High limit in heating

Range: 0...100%

Default: 100%

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P76 to P79 - 4

VFS high limit in heating

Technician Settings P83 to P88

P83 - View T2 temperature sensor readings

Note: If T2 is not connected, -9.9 will appear on display

CARRIER ComfortVu BACnet TB-24-C - P83 - View T2 temperature sensor readings - 1
T2 Sensor Not connected

CARRIER ComfortVu BACnet TB-24-C - P83 - View T2 temperature sensor readings - 2
T2 Sensor readings (°C)

P84 - View T3 temperature sensor readings

Note: If T3 is not connected, -9.9 will appear on display

CARRIER ComfortVu BACnet TB-24-C - P84 - View T3 temperature sensor readings - 1

T3 Sensor T3 Sensor Not connected readings (°C/°F)
CARRIER ComfortVu BACnet TB-24-C - P84 - View T3 temperature sensor readings - 2
T3 Sensor adings (°C/°F)

P85 - De-ice in cool - cut-in temperature (AC only)

Range: -9.5...+8°C / 15...46°F

Default: 0^ / 32^

The indoor unit coil temperature in which de-icing will start.

CARRIER ComfortVu BACnet TB-24-C - P85 - De-ice in cool - cut-in temperature (AC only) - 1

P86 - De-ice in cool - cut-out temperature (AC only)

Range: 2...20°C / 36...68°F

Default: 8°C / 46°F

The indoor unit coil temperature in which de-icing will stop.

CARRIER ComfortVu BACnet TB-24-C - P86 - De-ice in cool - cut-out temperature (AC only) - 1

P87 - De-ice in heat time (AC only)

Range: 2...7 Minutes

Default: 5 Minutes

The length of de-icing procedure.

CARRIER ComfortVu BACnet TB-24-C - P87 - De-ice in heat time (AC only) - 1
Deice in heat time

P88 - De-ice in heat break time (AC only)

Range: 10...30 Minutes

Default: 25 Minutes

The time interval between de-icing cycles.

CARRIER ComfortVu BACnet TB-24-C - P88 - De-ice in heat break time (AC only) - 1
Deice in heat break time

Technician Settings P89 to P99

P89 - De-ice in heat - cut-in temperature (AC only)

Range: -9.5...+8°C / 15...46°F

Default: 0^ / 32^

The outdoor unit coil temperature in which de-icing will start.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P89 to P99 - 1

P90 - De-ice in heat - cut-out temperature (AC only)

Range: 2...20°C / 35...68°F

Default: 16°C / 61°F

The outdoor unit coil temperature in which de-icing will stop.

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P89 to P99 - 2

P91 - Compressor delay (AC only)

Range: 0...360 Seconds

Default: 240 Seconds

DIP Switch SW3.5 must be in "OFF" position - compressor delay enabled!

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P89 to P99 - 3
Compressor delay

P98 - Display setpoint only (hide room temperature)

"00" - Display both setpoint and room temperatures

"01" - Display only the setpoint temperature

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P89 to P99 - 4
Show room temperature

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P89 to P99 - 5
Hide room temperature

P99 - One or Two setpoints (for cool and for heat)

"00" - One setpoint for cooling and heating

"01" - Two setpoints, one for cool and one for heat

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P89 to P99 - 6
One set point

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P89 to P99 - 7
Two set points

Technician Settings P101 to P111

P101 - Screen dimming delay

Range: 0...99 minutes

Default: 5 minutes

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 1
Screen dimming delay

P107 - Weekly program configuration

"00" - Disable weekly program (program parameters will be lost)

"01" - 7 days with the same program

"02" - One program for Monday to Friday and another program for Saturday and Sunday

"03" - One program for Monday to Friday, one for Saturday, and another for Sunday

"04" - 7 days with the different program for each day

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 2
Weekly program configuration

P108 - Weekly program - events per day

"00" - Two different events per day

"01" - Four different events per day

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 3
Weekly program events per day

P109 - Weekly program event configuration

"00" - US Program: Event start time, Mode, Fan speed, Setpoints (one or two)

"01" - Eu program: Event start time, Stop time

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 4
Weekly program event configuration

P111 - PIR Sensitivity

Range: 1...5 (1 - Less sensitive, 5 - More sensitive)

Default: 4

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 5
PIR Sensitivity

Technician Settings P114 to P119

P114 – Cool PID Kp (FC only)Range: 0...100%Default: 100%CARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 6Cool PID Kp
P115 – Heat PID Kp (FC only)Range: 0...100%Default: 100%CARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 7Heat PID Kp
P116 – Cool PID Ki (FC only)Range: 0...100%Default: 0%CARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 8Cool PID Ki
P117 – Heat PID Ki (FC only)Range: 0...100%Default: 0%CARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 9Heat PID Ki
P118 – Cool PID Kd (FC only)Range: 0...100%Default: 1%CARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 10Cool PID Kd
P119 – Heat PID Kd (FC only)Range: 0...100%Default: 1%CARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 11Heat PID Kd

Technician Settings P122 to P188

P122 - Cool Proportional output threshold time (seconds) (FC only)
Range: 0...100 secondsCARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 12
Default: 60 seconds
Cool proportional threshold time
P123 - Heat Proportional output threshold time (seconds) (FC Only)
Range: 0...100 secondsCARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 13
Default: 60 seconds
Heat proportional threshold time
P160 - Minimum compressor ON time (AC only)
Range: 0...20 minutesCARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 14
Default: 2 minutes
Minimum compressor ON time
P161 - Minimum compressor OFF time (AC only)
Range: 0...20 minutesCARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 15
Default: 13 minutes
Minimum compressor OFF time
P170 - Economizer low limit temperature
Range: 9...27°C / 48...80°FCARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 16
Default: 17°C / 63°F
Economizer low limit temperature (°C) (°F)
P187 - Display or hide humidity reading
“00” - Do not display humidity readingCARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 17
“01” - Display humidity reading
Display or hide humidity readings
P188 - Room temperature limit for disabling dehumidification in unoccupied mode
Range: 10...30°C / 50...85°FCARRIER ComfortVu BACnet TB-24-C - Technician Settings P101 to P111 - 18
Default: 18°C / 64°F
Temp. for disabling dehum. In unocc mode (°C) (°F)

Technician Settings P189 to P195

P189 - Dehumidification cycle in unoccupied mode

Range: 0...600 minutes

Default: 20 minutes

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P189 to P195 - 1

Dehumidification cycle in unocc. mode

P190 - Dehumidification break time in unoccupied mode

Range: 0...900 minutes

Default: 40 minutes

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P189 to P195 - 2

Dehumidification break in unocc. mode

P192 - Temperature setpoint for reheat in unoccupied mode

Range: 10...30°C / 50...86°F

Default: 15°C / 59°F

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P189 to P195 - 3

Setpoint for reheat in unocc. mode (°C) (°F)

P193 - Display switching time (between temperature and humidity)

Range: 0...11 seconds

Default: 5 seconds

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P189 to P195 - 4

Display switching time Hum./Temp.

P194 - Humidity differential band

Range: 0...10 %RH

Default: 5%RH

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P189 to P195 - 5

Humidity differential band

P195 - Humidity sensor reading offset

Range: -9...+9 %RH

Default: 0 %RH

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P189 to P195 - 6

Technician Settings P196 to P200

P196 - Dead zone between humidification and dehumidification

Range: 0...100 %RH

Default: 0 %RH

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P196 to P200 - 1
Dead zone Hum./Dehum.

P197 - Humidity setpoint

Range: 20...100 %RH

Default: 45 %RH

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P196 to P200 - 2
Humidity setpoint

P198 - Not in use

CARRIER ComfortVu BACnet TB-24-C - Technician Settings P196 to P200 - 3
Communication protocol indication

Press the ▲button. The display changes from "00" to "01".

Press the [On/Off] button to restore default settings.

The thermostat turns Off.

P200 00 SCT 0 → P200 0 1 SCT 0

Restore defaults

Press the [On/Off] button or wait 60 seconds to return to normal display.

Alarms and indications

CARRIER ComfortVu BACnet TB-24-C - Alarms and indications - 1

T1 Internal sensor or T1 External sensor fault

CARRIER ComfortVu BACnet TB-24-C - Alarms and indications - 2

De-icer in cool indication

CARRIER ComfortVu BACnet TB-24-C - Alarms and indications - 3

De-icer in heat indication

CARRIER ComfortVu BACnet TB-24-C - Alarms and indications - 4

Overheat in heat

CARRIER ComfortVu BACnet TB-24-C - Alarms and indications - 5

Overheat in cool

CARRIER ComfortVu BACnet TB-24-C - Alarms and indications - 6

Teconomizer sensor fault

CARRIER ComfortVu BACnet TB-24-C - Alarms and indications - 7

Economy by:

• Window contact - Remote on/off switch
• Window contact - Remote economy switch

CARRIER ComfortVu BACnet TB-24-C - Alarms and indications - 8

Economy by:

  • External PIR
  • Communication

CARRIER ComfortVu BACnet TB-24-C - Alarms and indications - 9

Economy by door switch

CARRIER ComfortVu BACnet TB-24-C - Alarms and indications - 10

Economy by key-tag

Document revision history

DateTopicChange Description
4/7/20 Installation UpUpdated installation height
Alarms and indicatorsUpdated Teconomizer sensor fault image
2/26/20 Cover Updatted graphic
MAC address and BACnet Device instance number - In an Analog Network Output microblockAdded subsequent values
2/18/20Operating instructionsMultiple revisions
Weekly program Multiple revisions
Wiring and DIP switch configurations - AC systems - Output 14Added (3) to each Config
Technician Settings Multiple revisions
Alarms and indications Added E1, E2,E4, and E5
9/9/19Operating Instructions, P10Added AC and FC configurations
Operating Instructions, P11Changed Remote economy switch settings
Technician Settings, P34Changed P11 default from 60 to 600 seconds
Technician Settings, P35Changed P17 range from 250 to 900 minutes
2/18/20Operating instructionsMultiple revisions
Weekly programMultiple revisions
Wiring and DIP switch configurations - AC systems - Output 14Added (3) to each Config
Technician Settings Multiple revisions
Alarms and indications Added E1, E2,E4, and E5
9/9/19Operating Instructions, P10Added AC and FC configurations
Operating Instructions, P11Changed Remote economy switch settings
Technician Settings, P34Changed P11 default from 60 to 600 seconds
Technician Settings, P35Changed P17 range from 250 to 900 minutes
5/22/19Technician Settings, P03Changed 86c to 30c, changed 30f to 86f
2/21/19FC configurations for 2-pipe systemsChanged configurations numbers from 20 through 23 to 10 through 13
FC configurations for 4-pipe systemsChanged configurations numbers from 31 through 39 to 14 through 22
2/18/19SpecificationsChanged Mounting specification description
Added CE and C-Tick icons to Compliance specification
InstallationChanged step B and illustrations
Technician Settings, P122 and P123Changed from percent to time (seconds)

CARRIER ComfortVu BACnet TB-24-C - Alarms and indications - 11

CARRIER CORPORATION ©2020 · Catalog No. 11-808-723-01 · 4/7/2020

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Product information

Brand : CARRIER

Model : ComfortVu BACnet TB-24-C

Category : Thermostat