Carrier TB NAC Thermostat User Manual

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T B --- N A C  
T B --- N H P  
Base Series  
Non --- Programmable Thermostat  
Installation Instructions  
could result in personal injury or death. CAUTION is used to  
identify unsafe practices which may result in minor personal injury  
or product and property damage. NOTE is used to highlight  
suggestions which will result in enhanced installation, reliability, or  
operation.  
INTRODUCTION  
The Base Series thermostat is an electronic 24VAC,  
non -- programmable, manual changeover wall mount thermostat.  
This thermostat uses a single setpoint to maintain and control room  
temperature in both the heating and air conditioning modes. The  
thermostat is designed to maintain +/ -- 2_F accuracy. No batteries  
are required; temperature, fan, mode, and installer configuration  
settings are preserved with power off.  
INSTALLATION CONSIDERATIONS  
Air Conditioner Model  
TB -- NAC, Base Series Model air conditioner thermostat, may be  
wired with or without connecting a common wire between the  
indoor equipment and the thermostat. However, it is recommended  
to use a common wire whenever possible. Without a common wire  
this thermostat becomes “power stealing.” This means it will need  
to steal a small amount of power from the equipment to which it is  
connected.  
NOTE: Not all HVAC equipment is compatible with power  
stealing type thermostats. All Carrier equipment is directly  
compatible with this thermostat except the Thermostat Conversion  
Kit, Part #TSTATXXCNV10. For all non -- Carrier equipment,  
consult the system equipment Installation Instructions before  
applying this thermostat in a power stealing manner.  
A07108  
Base Non --- Programmable Thermostat  
NOTE: Read the entire instruction manual before starting the  
installation.  
TABLE OF CONTENTS  
PAGE  
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1  
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
INSTALLATION CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1  
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Step 1 — Thermostat Location . . . . . . . . . . . . . . . . . . . . . . . . 1  
Step 2— Install Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Step 3 — Set Thermostat Configuration . . . . . . . . . . . . . . . . . 2  
Step 4 — Thermostat Operation . . . . . . . . . . . . . . . . . . . . . . . . 3  
Step 5 — Check Thermostat Operation . . . . . . . . . . . . . . . . . . 3  
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Heat Pump Model  
TB -- NHP, Base Series Model heat pump thermostat, is compatible  
with all Carrier heat pump systems. It is NOT power stealing and  
MUST have both the R and C terminals connected to operate  
properly. This thermostat uses a green LED to indicate auxiliary  
heat and emergency heat operation.  
INSTALLATION  
Step 1 — Thermostat Location  
Thermostat should be mounted:  
SAFETY CONSIDERATIONS  
Read and follow manufacturer instructions carefully. Follow all  
local electrical codes during installation. All wiring must conform  
to local and national electrical codes. Improper wiring or  
installation may damage thermostat.  
S
Approximately 5 ft (1.5m) from floor.  
S
Close to or in a frequently used room, preferably on an  
inside partitioning wall.  
On a section of wall without pipes or duct work.  
S
Recognize safety information. This is the safety -- alert symbol  
.
Thermostat should NOT be mounted:  
When you see this symbol on the equipment and in the instruction  
manual, be alert to the potential for personal injury. Understand the  
signal words DANGER, WARNING, and CAUTION.  
These words are used with the safety -- alert symbol. DANGER  
identifies the most serious hazards which will result in severe  
personal injury or death. WARNING signifies a hazard which  
S
Close to a window, on an outside wall, or next to a door  
leading to the outside.  
S
Exposed to direct light and heat from the sun, a lamp,  
fireplace, or other heat -- radiating object which may cause  
a false reading.  
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S
S
Close to or in direct airflow from supply registers and  
return -- air grilles.  
In areas with poor air circulation, such as behind a door  
or in an alcove.  
intended to be made at installation and normally are not modified  
by the homeowner. Below is a list of available options followed by  
a description of each one.  
Option 01 -- Equipment Type  
Step 2 — Install Thermostat  
Option 03 -- Fahrenheit or Centigrade operation  
Option 04 -- Enable fan (G) ON with heat (W)  
!
Option 10 -- O (reversing valve) On with Heat or Cool (present  
on Heat Pump model only)  
WARNING  
ELECTRICAL SHOCK HAZARD  
Option 13 -- Room temperature offset adjustment  
Note that not all configuration option numbers are used in this  
product.  
Failure to follow this warning could result in personal injury  
or death.  
To Enter The Configuration Mode:  
Before installing thermostat, turn off all power to unit. There  
may be more than 1 disconnect.  
Press and hold FAN button for approximately 10 sec until room  
temperature disappears and the display reads “01”. You are now in  
configuration mode.  
1
2
. Turn OFF all power to unit.  
. If an existing thermostat is being replaced:  
a. Remove existing thermostat from wall.  
NOTE: If FAN button is pressed again, or if no button is pressed  
for 2 minutes, the thermostat will exit configuration mode and  
return to normal operation. To re -- enter configuration mode, the  
FAN button must be pressed and held for 10 sec again.  
b. Disconnect wires from existing thermostat, one at a  
time. Be careful not to allow wires to fall back into wall.  
While in the configuration mode, the temperature display is used to  
show both the option number and the selected choice within each  
option. Each press of the H/C button alternates between the option  
number and the selection within that option. When the  
configuration mode is first entered, option 01 is displayed. The up  
and down buttons now move between the available option  
numbers. Once an option number is selected, press the H/C button  
once to display the currently selected choice within that option.  
The up and down buttons now move between the available choices  
within that option. After the new choice is made, press the H/C  
button again to return to the option number display. When finished  
with option selections, press FAN button once to exit the  
configuration mode.  
c. As each wire is disconnected, record wire color and  
terminal marking.  
d. Discard or recycle old thermostat.  
!
CAUTION  
ENVIRONMENTAL HAZARD  
Failure to follow this caution may result in environmental  
damage.  
Mercury is a hazardous waste. Federal regulations require that  
Mercury be disposed of properly.  
Option 01 — Equipment Type  
Selections: with HP thermostat: HP, AC, PH, or PC  
with AC thermostat: AC or PC  
Meanings:  
3
4
. Separate front and back (mounting base) assembly of  
thermostat.  
. Route thermostat wires through hole in mounting base.  
Level mounting base against wall (for aesthetic value only,  
thermostat need not be level for proper operation) and mark  
wall through 2 mounting holes.  
PH or PC selects PTAC units (Packaged Terminal Air  
Conditioners) which are used in motel rooms and other  
rented spaces. When this option is selected, the display  
shows only the setpoint, not the room temperature. Also  
the compressor timeguard is disabled, allowing the  
compressor to turn on immediately when a demand is  
established.  
5
6
. Drill two 3/16 -- in. mounting holes in wall where marked.  
. Secure mounting base to wall with 2 anchors and screws  
provided making sure all wires extend through hole in  
plastic.  
HP or PH controls 1 speed heat pump with 1 stage of aux heat.  
AC or PC controls 1 speed air conditioner with one stage of heat.  
Note that this option allows a HP thermostat to be converted to  
control an AC system.  
7
8
. Strip 1/4 in. insulation from thermostat wire and adjust  
length to reach terminal block connector on mounting base.  
Match and connect proper wiring in accordance with wiring  
diagrams.  
Option 03 — Fahrenheit/Centigrade Selection  
This selection operates the thermostat in either Fahrenheit or  
Centigrade. Factory default is F.  
. Push any excess wire back into wall. Seal hole in wall to  
prevent air leaks. Leaks can affect thermostat operation.  
Any excess wire left inside thermostat casing may also  
affect thermostat operation by interfering with airflow  
across the temperature sensor.  
Available Selection:  
Use UP and DOWN buttons to change between F and C.  
Option 04 — G (fan) ON with W (Heat) Selection  
This selection determines whether G (fan) output is to be ON or  
OFF when W (furnace or strip heat) output is ON. Most furnaces  
and fan coils manage their own blowers and do not require a  
separate G signal. For these applications, select OFF. Some  
auxiliary heaters require a separate G signal from the thermostat to  
turn on the blower. In this case, select ON. Factory default is OF  
9
. Snap thermostat together making sure terminal block  
connector aligns, and assembly is secure.  
1
0. Turn on power to unit.  
On power up, depending on the thermostat model being used, the  
LCD readout will display either, AC or PC for air conditioner  
model (1 -- stage heat/1 -- stage cool), or HP or PH for heat pump  
model (2 -- stage heat/1 -- stage cool).  
(off).  
Step 3 — Set Thermostat Configuration  
Available Selection:  
Configuration options allow the installer to configure the  
thermostat for a particular installation. These selections are  
Use UP and DOWN buttons to change between ON and OFF.  
2
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Option 10 — O (reversing valve) On with Heat or Cool  
Selection  
This selection is only available on heat pump model thermostats.  
This selection determines whether the reversing valve is energized  
in the heating or cooling mode. Factory default is C.  
equipment can turn off in less than 3 minutes if a change in  
setpoint or a change in mode occurs.  
Staging Timer  
If the thermostat is a heat pump model, it has 2 -- stage heat  
capability. With HP operation, there is a 15 -- minute delay between  
the first and second stages of heat. The Y output will energize first,  
then 15 minutes later, W is allowed to come on if the thermostat  
determines it is not satisfying the demand.  
Available Selection:  
Use UP and DOWN buttons to change between H and C.  
Option 13 — Room Temperature Offset Adjustment  
However, if the heating demand is greater than 5_F, there will be  
This option allows calibration (or deliberate miscalibration) of the  
room temperature sensor. There are various reasons why  
homeowners may want to have displayed temperature adjusted to a  
higher or lower value. The selected number is the number of  
degrees, plus or minus, which will be added to actual temperature.  
only a 30 second delay before bringing on W.  
Auxiliary Heat Indicator  
A green LED indicates the use of auxiliary heat or emergency heat.  
Error Messages  
The numbers can range between -- 5 and +5. Factory default is 0.  
Available Selection:  
 -- -- ” (two dashes) will be displayed if the thermostat cannot  
properly read room temperature. If “ -- -- ” appears, replace  
thermostat.  
Use UP and DOWN buttons to now move between -- 5 and +5 in  
increments of 1.  
E4 will be displayed if the thermostat has an internal memory  
failure. If E4 appears, replace thermostat.  
Step 4 — Thermostat Operation  
Temperature Display  
Step 5 — Check Thermostat Operation  
Fan Operation  
Thermostat will display room temperature until UP or DOWN  
button is pressed. The word SET appears when these buttons are  
pressed and the current setpoint is displayed. If no buttons are  
pressed for 5 sec, the display will change back to show room  
temperature.  
1
. Press FAN button. This will start continuous fan operation.  
FAN annunciator will turn on.  
2
. Press FAN button again. This will stop continuous fan  
operation. FAN annunciator will turn off.  
Heating Operation  
Timeguard Timer  
1
. Press H/C button until HEAT is displayed.  
A 5 -- minute timeguard is built into the thermostat immediately  
upon power up, and any time the compressor turns off. The  
compressor will not turn on until the timeguard has expired. The  
timeguard affects only compressor operation. Pressing UP and  
FAN buttons simultaneously will override the timeguard for 1  
cycle. With PH or PC selected under Option 01, this timer is  
defeated.  
2. Press UP button until LCD readout reads 3_F above room  
temperature. Press UP and FAN buttons simultaneously to  
defeat timers. Heating system should begin to operate  
immediately.  
3
. For HP thermostats only, press H/C button until EMHT  
emergency heat) appears. Press UP and FAN buttons  
(
Cycle Timer  
simultaneously to defeat timers. Emergency heating (W is  
ON, Y is OFF) should begin immediately.  
In normal heating and cooling operation the thermostat will not  
allow more than 4 equipment cycles per hour (or 1 cycle every 15  
minutes). Both the Y and W outputs have a 15 -- minute timer that  
starts counting down when the output is turned on, (e.g., if Y  
output is turned on for 9 minutes and then satisfies, it cannot turn  
back on for another 6 minutes regardless of demand). However,  
pressing UP and FAN buttons simultaneously or changing the  
setpoint will override the timer for 1 cycle.  
Cooling Operation  
1
2
. Press H/C button until COOL is displayed.  
. Press DOWN button until LCD readout reads 3_F below  
room temperature. Press UP and FAN buttons  
simultaneously to defeat timers. Cooling system should  
begin to operate immediately.  
Table 1 shows the thermostat outputs for each available stage of  
heating or cooling. It may be useful in checkout or  
troubleshooting.  
Minimum on Timer  
Once the equipment has turned on, it will remain on for a  
minimum of 3 minutes regardless of demand. However, the  
Table 1 – Outputs  
EQUIPMENT  
CONFIGURATION  
OPTION #1  
THERMOSTAT  
FACTORY  
CONFIGURATION  
COOL  
STAGE 1  
HEAT  
STAGE 1  
HEAT  
STAGE 2  
EM HEAT  
AC, PC  
AC, HP  
HP  
Y, G  
W
--- ---  
--- ---  
HP, PH  
RVS = C  
Y, G, O / B  
Y, G  
Y, G  
Y, G, W  
W
W
HP, PH  
RVS = H  
HP  
Y, G, O / B  
Y, G, W, O / B  
3
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WIRING DIAGRAMS  
A06566  
A06567  
Fig. 1 -- A/C Thermostat Typical Installation  
Fig. 2 -- HP Thermostat Typical Installation  
Copyright 2007 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231  
Printed in U.S.A.  
Edition Date: 02/07  
C a t a l o g N o : T B --- N A C --- 1 S I  
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.  
Replaces: NEW  
4
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T B --- N A C  
T B --- N H P  
Base Series  
Non --- Programmable Thermostat  
Homeowner’s Guide  
1
. To Select the Mode:  
Use the H/C button to move between the choices. OFF,  
HEAT, COOL, or EMHT will appear on the display. EMHT  
will only appear on heat pump models.  
2
3
4
. To Select the Fan Operation:  
Use the FAN button to move between continuous fan  
(indicated by the FAN ON icon) and auto fan operation.  
. To Read the Room Temperature:  
The large display reads room temperature until a button is  
pressed.  
. To Adjust the Setpoint:  
In normal operation, the large display shows room  
temperature. At the first press of the UP or DOWN button,  
the large display shows the current setpoint and the SET  
TEMP icon is turned on. Further presses of the UP or  
DOWN button adjust the setpoint upward or downward.  
Five seconds after the last button press, the display returns  
to the room temperature and the SET TEMP icon turns off.  
A07108  
Base Non --- Programmable Thermostat  
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Carrier Corporation  
FOR SERVICE OR REPAIR, FOLLOW THESE STEPS IN ORDER:  
FIRST: Contact the installer. You may find their name on the furnace or in your Homeowner’s Packet. If the installer’s name is not known,  
call your builder or home retailer if yours is a new residence.  
SECOND: Contact the nearest distributor. (See telephone yellow pages.)  
THIRD: Contact:  
Carrier Corporation  
Consumer Relations  
P.O. Box 4808  
Syracuse, New York 13221  
Phone: 1 -- 800 -- 428 -- 4326  
Model No. ____________________________________________ Unit Serial No. _________________________________________  
Date of Installation ______________________________________ Installed by ___________________________________________  
Name of Owner ________________________________________ Address of Installation ___________________________________  
THERMOSTAT LIMITED WARRANTY  
FIVE -- YEAR LIMITED WARRANTY -- Carrier Corporation (hereinafter referred to as “Company”) warrants this product to be free from  
defects in material and workmanship. If a defect is found within five years from date of original installation of product (whether or not actual  
use begins on that date) Company will provide a new or remanufactured part, at Company’s sole option, to replace any defective part, without  
charge for the part itself.  
This warranty does not include labor or other costs incurred for diagnosing, repairing, removing, installing, shipping, servicing or handling of  
either defective parts or replacement parts.  
WARRANTY CONDITIONS:  
5
6
. Warranties apply only to products in their original installation location.  
. Installation, use, care, and maintenance must be normal and in accordance with instructions contained in the Owner’s Manual and  
Company’s service information.  
7
8
. Defective parts must be returned to the distributor through a registered servicing dealer for credit.  
. All work shall be performed during normal working hours.  
LIMITATIONS OF WARRANTIES -- ALL IMPLIED WARRANTIES (INCLUDING IMPLIED WARRANTIES OF  
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE) ARE HEREBY LIMITED IN DURATION TO THE  
PERIOD FOR WHICH THE LIMITED WARRANTY IS GIVEN AND APPLIES. SOME STATES DO NOT ALLOW  
LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE MAY NOT APPLY TO YOU. THE  
EXPRESSED WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND MAY NOT BE ALTERED, ENLARGED,  
OR CHANGED BY ANY DISTRIBUTOR, DEALER, OR OTHER PERSON, WHATSOEVER.  
COMPANY WILL NOT BE RESPONSIBLE FOR:  
1
2
3
4
. Normal maintenance as outlined in the installation and servicing instructions or Owner’s Manual, including filter cleaning and/or  
replacement and lubrication.  
. Damage or repairs required as a consequence of faulty installation, misapplication, abuse, improper servicing, unauthorized alteration  
or improper operation.  
. Failure to start due to voltage conditions, blown fuses, open circuit breakers, or damages due to the inadequacy or interruption of  
electrical service.  
. Damage as a result of floods, winds, fires, lightning, accidents, corrosive environments or other conditions beyond the control of  
Company.  
5
6
7
. Parts not supplied or designated by Company, or damages resulting from their use.  
. Company products installed outside the continental U.S.A., Alaska, Hawaii, and Canada.  
. Electricity or fuel costs, or increases in electricity or fuel costs from any reason whatsoever, including additional or unusual use of  
supplemental electric heat.  
8
. ANY SPECIAL INDIRECT OR CONSEQUENTIAL PROPERTY OR COMMERCIAL DAMAGE OF ANY NATURE  
WHATSOEVER. Some states do not allow the exclusion of incidental or consequential damages, so the above limitation may not  
apply to you.  
This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state.  
Catalog No. 03TS -- TA50  
49004DP21  
1
-- 03  
Copyright 2007 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231  
Printed in U.S.A.  
Edition Date: 02/07  
C a t a l o g N o : T B --- N A C --- 1 S I  
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.  
Replaces: NEW  
2

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