Carrier TB-NHP User Manual
T B --- N A C
T B --- N H P
Base Series
Non---Programmable Thermostat
Installation Instructions
Designed and Assembled
in the USA.
US patents: US20060165149 A1, USD578026 SI, US6205041 B1
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 2....................................
Step 1 — Thermostat Location 2........................
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................................
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency muse use factory--authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have a fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit. Consult local
building codes and the current editions of the National Electrical
Code (NEC) NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical
Code CSA C22.1.
Recognize safety information. This is the safety--alert symbol
When you see this symbol on the unit and in the instructions or
manuals, 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 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.
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:
S Approximately 5 ft (1.5m) from floor.
S Close to or in a frequently used room, preferably on an inside
partitioning wall.
S On a section of wall without pipes or duct work.
Thermostat should NOT be mounted:
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.
S Close to or in direct airflow from supply registers and return--air
grilles.
S In areas with poor air circulation, such as behind a door or in an
alcove.
Step 2 — Install Thermostat
TB--NAC / TB --NHP
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing thermostat, turn off all power to unit. There
may be more than 1 disconnect.
1. Turn OFF all power to unit.
2. If an existing thermostat is being replaced:
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.
3. Separate front and back (mounting base) assembly of ther-
4. Route thermostat wires through hole in mounting base.
5. Drill two 3/16--in. mounting holes in wall where marked.
6. Secure mounting base to wall with 2 anchors and screws
7. Strip 1/4 in. insulation from thermostat wire and adjust
!
WARNING
a. Remove existing thermostat from wall.
b. Disconnect wires from existing thermostat, one at a
time. Be careful not to allow wires to fall back into wall.
c. As each wire is disconnected, record wire color and
terminal marking.
d. Discard or recycle old thermostat.
!
CAUTION
mostat.
Level mounting base against wall (for aesthetic value only,
thermostat need not be level for proper operation) and mark
wall through 2 mounting holes.
provided making sure all wires extend through hole in
plastic.
length to reach terminal block connector on mounting base.
Match and connect proper wiring in accordance with wiring
diagrams.
8. 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.
9. Snap thermostat together making sure terminal block connector aligns, and assembly is secure.
10. 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).
Step 3 — Set Thermostat Configuration
Configuration options allow the installer to configure the
thermostat for a particular installation. These selections are
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
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)
Option 13 -- Room temperature offset adjustment
Note that not all configuration option numbers are used in this
product.
To Enter The Configuration Mode:
Press and hold FAN button for approximately 10 sec until room
temperature disappears and the display reads “01”. You are now in
configuration mode.
NOTE: If FAN button is pressed again, or if no button is pressed
for 3 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.
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.
Option 01 — Equipment Type
Selections: with HP thermostat: HP, AC, PH, or PC
with AC thermostat: AC or PC
Meanings:
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
compressortoturnonimmediatelywhenademandis
established.
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.
2
Option 03 — Fahrenheit/Centigrade Selection
This selection operates the thermostat in either Fahrenheit or
Centigrade. Factory default is F.
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
(off).
Available Selection:
Use UP and DOWN buttons to change between ON and OFF.
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.
Available Selection:
Use UP and DOWN buttons to change between H and C.
Option 13 — Room Temperature Offset Adjustment
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.
The numbers can range between --5 and +5. Factory default is 0.
Available Selection:
Use UP and DOWN buttons to now move between --5 and +5 in
increments of 1.
Step 4 — Thermostat Operation
Temperature Display
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.
Timeguard Timer
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.
Cycle Timer
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.
Minimum on Timer
Once the equipment has turned on, it will remain on for a
minimum of 3 minutes regardless of demand. However, the
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.
However, if the heating demand is greater than 5_F, there will be
only a 30 second delay before bringing on W.
Auxiliary Heat Indicator
A green LED indicates the use of auxiliary heat or emergency heat.
ErrorMessages
“----” (two dashes) will be displayed if the thermostat cannot
properly read room temperature. If “----” appears, replace
thermostat.
E4 will be displayed if the thermostat has an internal memory
failure. If E4 appears, replace thermostat.
Step 5 — Check Thermostat Operation
Fan Operation
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
1. Press H/C button until HEAT is displayed.
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 simultaneously to defeat timers. Emergency heating (W is ON,
Y is OFF) should begin immediately.
Cooling Operation
1. Press H/C button until COOL is displayed.
2. Press DOWN button until LCD readout reads 3_Fbelow
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.
TB--NAC / TB --NHP
Table 1 – Outputs
EQUIPMENT
CONFIGURATION
OPTION #1
AC, PC AC, HP Y, G W --- --- --- ---
HP, PH
RVS = C
HP, PH
RVS = H
THERMOSTAT
FACTORY
CONFIGURATION
HP Y, G , O / B Y, G Y, G , W W
HP Y, G Y, G , O / B Y, G , W, O / B W
COOL
STAGE 1
HEAT
STAGE 1
HEAT
STAGE 2
3
EM HEAT
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