Carrier ComfortVu TB-24-HM Operating instructions

CARRIER CORPORATION ©2019
A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-723-01 · 5/22/2019
ComfortVuTM
BACnet Thermostat Standard
Model TB-24-HM (24 Vac model)
Installation and Operation Guide

Table of Contents
- 2 -
Overview ………………………………………………………………………………………………………………………………..…. 4
Specifications ………………………………………………………………………………………………………………………..… 5-6
TB-24-HM Dimensions ……………………………………...………………….……………………………………………………..… 7
Operating instructions ……………………………………………………………………………………………………………..…… 8
Quick guide …………………………………………………………………………………………………………………..…….. 8
Turning the thermostat ON and OFF……………………………………………………………………………………....…….. 9
Selecting temperature scale………………………………………………………………………………………………..….…. 9
Adjusting the Setpoint temperature (for 1 setpoint and 2 setpoints configurations) ………………………………….……. 9
Selecting system mode…………………………………………………………………………………………………….…..… 10
Selecting Fan speeds (for 2 and 3 fan speeds configuration) ……………………………………………….……….…...… 10
Turning Auto fan ON or OFF (fan on demand) ………………………………………………………….….………….…...… 10
Locking the thermostat buttons ………………………………………………………………………………………….……… 10
Economy mode ………………………………………………………………………………………….…………….……...….. 11
Freeze Protection …………………………………………………………………………………………………….…...……... 11
Economizer ………………………………………………………………….……………………………………………………. 12
Weekly program ………………………………………………………………………………………….………………...……..… 13-17
MAC Address and BACnet Device Instance Number …………………………………………………………...….….……...… 18
Installation ………………………………………………………………………………………….………………………………....… 19
General ……………………………………………………………………………………...….…….….……………………..… 19
PIR detection area ……………………………………………………………………………………...….………..……...…… 19
Wiring terminals …………………………………………………………………………………….……………………....….… 20
DIP switch and jumper configurations………………………………………………...……………………....…….….……… 21
AC configurations ………………………………………………………………………………...……...….…….….…………. 22
FC configurations for 2-pipe systems …………………………………………………………………………………...……. 23
FC configurations for 4-pipe systems / Floor heating……………………………………………………...….…….….……. 24
Wiring and DIP switch configurations ………………………………………………………………………….………….. 25-39
P01 – Offset for temperature readings calibration
P02 – Setpoint limit for cooling
P03 – Setpoint limit for heating
P04 – Lock the [Fan] button
P05 – Lock the [Mode] button
P06 – Lock the [On/Off] button
P07 – Lock the [+] and [-] buttons (Set buttons)
P08 – Functionality of T1 terminals
P09 – Functionality of IN1,0 terminals
P10 – Window contact (terminals IN1,0) polarity
P11 – Window contact delay time
P12 – Door switch (terminals T1,0) polarity
P13 – Door switch delay time
P14 – Enable/Disable Auto change over mode
P15 – Motion sensor logic (PIR)
P16 – Enable/Disable Motion sensor
P17 – PIR (Motion sensor) delay time
P18 – Door switch or key tag configuration
Technician Settings ……………………………………………………………………………………...….……………...…….. 40-46
P19 – PIR (Motion sensor) polarity
P25 – Economy setpoint for cooling
P26 – Economy setpoint for heating
P27 – On-delay time on-delay between
heating stages
P28 – Off-delay time between heating stages
P29 – LCD Backlight ON or OFF
P30 – Beeper ON or OFF
P31 – Fan ON delay in cooling
P32 – Fan OFF delay in cooling
P33 – Fan ON delay in heating
P34 – Fan OFF delay in heating
P35 – Enable/Disable Freeze protection
P36 – Freeze protection cut-in setpoint
P37 – Freeze protection cut-out setpoint
P40 – View filter counter (hours) – Read only
P41 – Reset filter time
P42 – Adjust filter alarm delay counter (hours)

Technician Settings ……………………………………………………………………………………...….……………...…….… 47-62
- 3 -
P43 – Soft start in heat – cut-in temperature
P44 – Soft start in heat – cut-out temperature
P45 – Cool differential band
P46 – Cool differential band offset
P47 – Heat differential band
P48 – Heat differential band offset
P49 – Shift between Cool and Heat in Auto mode
P50 – Shift between Cooling stages
P51 – Shift between Heating stages
P52 – Cool valve proportional band
P53 – Cool proportional low limit
P54 – Cool proportional high limit
P55 – Heat valve proportional band
P56 – Heat proportional low limit
P57 – Heat proportional high limit
P60 – Proportional ON percent
P61 – Proportional OFF percent
P63 – Time on-delay between cooling stages
P64 – Time off-delay between cooling stages
P65 – Fan VFS proportional band in cooling
P66 – Fan VFS proportional band in heating
P67 – Fan VFS Low speed percent in cooling
P68 – Fan VFS Medium speed percent in cooling
P69 – Fan VFS High speed percent in cooling
P70 – Fan VFS Low speed percent in heating
P71 – Fan VFS Medium speed percent in heating
P72 – Fan VFS High speed percent in heating
P74 – VFS Medium speed differential
P75 – VFS High speed differential
P76 – Fan VFS Low limit in cooling
P77 – Fan VFS High limit in cooling
P78 – Fan VFS Low limit in heating
P79 – Fan VFS High limit in heating
P83 – View T2 temperature sensor readings
P84 – View T3 temperature sensor readings
P85 – De-ice in cool – cut-in temperature
P86 – De-ice in cool – cut-out temperature
P87 – De-ice in heat time
P88 – De-ice in heat break time
P89 – De-ice in heat – cut-in temperature
P90 – De-ice in heat – cut-out temperature
P91 – Compressor delay
P98 – Display setpoint only (hide room temperature)
P99 – One or Two setpoints
P101 – Screen dimming delay
P107 – Weekly program configuration
P108 – Weekly program - events per day
P109 – Weekly program event configuration
P111 – PIR Sensitivity
P114 – Cool PID Kp
P115 – Heat PID Kp
P116 – Cool PID Ki
P117 – Heat PID Ki
P118 – Cool PID Kd
P119 – Heat PID Kd
P122 – Cool Proportional output threshold in cooling
P123 – Heat Proportional output threshold in cooling
P160 – Minimum compressor ON time
P161 – Minimum compressor OFF time
P170 – Economizer low limit temperature
P187 – Display or hide humidity reading
P188 – Room temperature limit for disabling
dehumidification in unoccupied mode
P189 – Dehumidification cycle in unoccupied mode
P190 – Dehumidification break time in unocc. mode
P192 – Temperature setpoint for re-heat in
unoccupied mode
P193 – Display switching time (between temperature
and humidity)
P194 – Humidity differential band
P195 – Humidity sensor reading offset
P196 – Dead zone between humidification and
dehumidification
P197 – Humidity setpoint
P198 – Not in use
P200 – Restore defaults
Table of Contents
Alarms and indications ………………………………………………………………………………………………………………… 63
Document revision history ……………………………………………………………………………………..……………..…….… 64

Overview
- 4 -
The ComfortVu BACnet Thermostat Standard 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 an Carrier BACnet router in an 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, humidity, and motion 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.
See also:
ComfortVuTM BACnet Thermostat Points List and Technician Settings
TM

Specifications
- 5 -
Sensing Element: Range Accuracy
Temperature 41° F to 95° F (5° C to 35° C) ±1.0° F (0.5° C)
Humidity 10% to 90 % ±3.0% typical
Motion Sensing:
Sensor Type PIR, quad, omnidirectional
Distance 16.4 feet (5m)
Detection range (HxV) 90° x 30°
Movement speed 2.62 to 3.94 ft/s (0.8 to 1.2 m/s)
Detection object: 15.75 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.
Communication BACnet MS/TP with baud rates up to 76.8 kbps, detected and set automatically by the
BACnet Thermostat. Max 127 devices.
Inputs T1, 0 – Normally open or normally closed dry contract, or
0-10 Vdc analog input, or
50 kOhm thermistor @ 25°C
A, B - Communication +/- (RS485)
IN1, 0 - Normally open or Normally closed dry contract, or
0-10 Vdc analog input, or
50 kOhm thermistor @ 25°C
C, R - Power: 24 Vac
Outputs 11, 12, 13 – Digital outputs, 3A max.
14 – Digital outputs 0.3A max
. 15 and 16 – Depends on application.
Digital output 0.3A max., or
Analog output 0-10 Vdc, 5 mA max., not isolated
Environmental Operating Range 50° to 122°F (10° to 50°C), 10 to 90% relative humidity, non-condensing
Mounting • 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.
• If not using an electrical box, flush-mount thermostat to wall (no wallplate needed).

Specifications (cont.)
- 6 -
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:
Mark, Low Voltage Directive: 2014/35/EU RoHS Compliant: 2011/65/EU
Australia and New Zealand:
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.

TB-24-HM Dimensions
- 7 -

Temperature/Humidity
indications:
Mode Fan
C/F
Prog On/Off
Operating instructions
Quick guide
Setpoint adjust.
Ambient Humidity
Temperature scale
Fan speed indication:
Auto speed
High
Medium
Low
Fan on demand
Indications:
Alarm
Button locked
Program active
Program events indications:
Event per day
Adjust start time
Adjust stop time
Adjust the clock
Setpoint adjustment
- Press to select Fan speed:
Low/Medium/High/Auto
- Press and hold to activate
fan on demand
- Press to select System
Mode: Cool/Heat/Auto
- Press to turn unit On or Off
Ambient/Setpoint indication
temperature
Ambient humidity indication
Thermostat On/Off indication
System MODE indication:
Clock / Weekdays
Fan only
Cooling
Heating
Auto mode
- Press to switch between
temperature scales (ºC/ºF)
- Press and hold to enter
weekly program settings
- Press and hold to enter
Technician Settings
(setpoint must be equal to
10ºC/50ºF)
- Press and hold to enter
MAC Address settings
(setpoint must be equal to
11ºC/52ºF)
- 8 -
Clock
Stop
Start
Prog1234

Operating instructions (cont.)
Turning the thermostat ON and OFF
Press the [On/Off] button to turn the thermostat ON or OFF.
Selecting temperature scale
In One setpoint configuration:
1. Press the [+] or [-] buttons once to view the setpoint temperature.
2. Press again to adjust the setpoint.
In Two setpoints configuration:
1. Press the [+] or [-] buttons once – “ ” and the setpoint temperature for cooling will
appear on display.
2. Use the [+] or [-] button 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 [-] button to adjust the setpoint for heating.
Notes:
 The setpoint for cooling must be higher than the setpoint for heating.
 For humidity setpoint, see Technician Setting P197.
OFFON
Celsius Fahrenheit
Adjusting the Setpoint temperature
Press the [C/F] button to switch between temperature scales.
Setpoint
Setpoint
For heating
Setpoint
For cooling
- 9 -

Operating instructions (cont.)
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.
Turning Auto fan ON or OFF (fan on demand)
Auto fan
OFF
Auto fan
ON
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.
Selecting Fan speeds (for 2 and 3 fan speeds configuration)
Low Medium
High Auto
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 appear on display.
 Auto mode is not available in 2-Pipe system configuration.
Selecting system mode
Cool Heat
Auto Fan only
Locking the thermostat buttons
Press and hold both [-] and [Fan] buttons 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 P4-P7. Lock
indications
- 10 -