Bryant TSTAT User Manual
installation and
start-up instructions
PROGRAMMABLE THERMOSTATS
NOTE: Read the entire instruction manual before starting the
installation.
This symbol → indicates a change since the last issue.
INDEX
Page
SAFETY CONSIDERATIONS.....................................................1
INTRODUCTION..........................................................................1
INSTALLATION CONSIDERATIONS.......................................1
INSTALLATION......................................................................1-12
Location .................................................................................1-2
Set DIP Switches......................................................................2
Install Thermostat..................................................................2-3
Set Thermostat Configuration...............................................3-4
Check Thermostat Operation ................................................4-5
Final Settings ............................................................................5
Checklist....................................................................................5
WIRING DIAGRAMS .............................................................6-12
OPERATIONAL OPERATION..................................................13
TROUBLESHOOTING ...............................................................13
CONFIGURATION RECORD....................................................14
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.
Recognize safety information. This is the safety-alert symbol
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
could result in personal injury or death. CAUTION is used to
identify unsafe practices which would result in minor personal
injury or product and property damage.
INTRODUCTION
Bryant’s 7-day programmable thermostats are wall-mounted, lowvoltage thermostats which maintain room temperature by controlling the operation of a heating and air conditioning system.
Separate heating and cooling setpoints, plus auto changeover allow
setback programming for maximum energy savings. All of the
thermostats allow up to 4 time/temperature settings to be programmed per 24 hr period and store programs for 7 independent
days. Batteries are not required; during a power interruption, the
internal memory stores programs for an unlimited time and the
clock continues to run for at least 72 hrs.
INSTALLATION CONSIDERATIONS
POWER
Note that all TSTAT models require no batteries and are not
"power stealing". They do require 24VAC (R and C terminals) to
be connected for proper operation. Thermostat will not operate
without these 2 connections.
TSTAT
Cancels: II TSTAT-0-11 II TSTAT-0-19
9-98
As an ENERGY STAR Partner, Bryant Heating & Cooling
Systems has determined that this product meets the ENERGY STAR guidelines for energy efficiency.
®
A98427
HEIGHT (IN.) WIDTH (IN.) DEPTH (IN.)
4-1/4 7-1/2 1-3/8
→ Fig. 1—Bryant Programmable Thermostat
.
MODELS
There are 3 different models. The 9th and 10th letters of the part
number indicate the model. These 2 letters appear on the package
and on the circuit board. Be sure to have the proper thermostat for
the intended application. Models are:
AC - 1-stage cool, 1-stage heat - for AC systems only.
HP - 1-stage cool, 2-stage heat - for either HP or AC with 2-stage
heat.
2S - 2-stage cool, 2-stage heat - for 2-speed AC systems, or
2-stage cool, 3-stage heat - for 2-speed HP systems, or
1-stage cool, 4-stage heat - for 1-speed HP with special
3-stage electric heat.
Use each only for its intended purpose. (See Table 1.)
OUTDOOR TEMPERATURE SENSING
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All Bryant programmable thermostats may be equipped with an
optional outdoor temperature sensor, Part No.
TSTATXXSEN01-B. If it is to be used, plan installation so that 2
wires can be run from the thermostat to an outdoor location,
preferably on the north side of the house OR refer to Installation
Instructions included with the outdoor temperature sensor for
simplified connection. Sensor can be mounted to outdoor unit and
existing control wires used for its connection. Details are provided
to the sensor instructions.
INSTALLATION
I. THERMOSTAT LOCATION
Thermostat should be mounted:
• Approximately 5 ft (1.5m) from floor.
—1—
• Close to or in a frequently used room, preferably on an inside
partitioning wall.
• On a section of wall without pipes or duct work.
Thermostat should NOT be mounted:
• Close to a window, on an outside wall, or next to a door leading
to the outside.
• Exposed to direct light and heat from a lamp, sun, fireplace, or
other temperature-radiating object which may cause a false
reading.
• 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.
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II. SET DIP SWITCHES
There is a 4 section DIP switch within the thermostat which must
be properly set by the installer. It is easiest to set these 4 switches
before the thermostat is mounted to the wall, so STOP and
complete the following steps:
1. Open hinged thermostat cover.
2. Remove cover completely by snapping it apart at hinge.
3. Open thermostat by pressing back half of the right end of
plastic case inward while, at the same time, pulling front
and back halves apart at the right end. The 2 halves will
swing apart.
4. Snap hinge apart to completely separate the 2 halves.
5. Switches are located in upper right corner of circuit board.
To change switch position, use corner of a small screwdriver to slide switch to opposite position.
6. After switches have been set, do not reassemble the 2
halves. The rear plastic will be first mounted to wall.
SWITCH A - ZONING SELECT (ACTIVE ON ALL MODELS)
This switch selects or defeats the 4 cycles per hour limit and a
5-minute compressor timeguard. These timers MUST be enabled
for normal operation and disabled for zoning applications. (In
zoning applications the zone control center performs these timing
functions.)
TO SET:
OFF— for normal operation. This is the factory default.
ON—for zoned installations ONLY.
SWITCH B - SETBACK RECOVERY (ACTIVE ON ALL
MODELS)
Selects between normal and smart recovery from setback. Normal
recovery changes to the new setpoint at the programmed time.
Smart recovery, which is active in heating mode only, starts earlier
and adjusts the setpoint slowly so that room temperature will arrive
at the programmed temperature at the programmed time.
TO SET:
OFF—for smart recovery. This is the factory default.
ON—for normal recovery.
SWITCH C - HP/AC SELECT (ACTIVE ON HP AND 2S
MODELS ONLY)
Use to select between AC and HP installations. HP and 2S models
have an extra relay to control the HP reversing valve. When a HP
thermostat is placed in the AC mode, this extra relay is converted
to a second stage heat output. This allows thermostat control of
2-stage furnaces or 2-stage strip heat with AC systems. (AC mode
also uses W rather than Y for first-stage heat.)
TO SET:
OFF—for HP applications. Extra relay controls reversing valve.
This is factory default.
ON—for AC applications. Extra output can be used for 2-stage
heat.
→
SWITCH D - INTELLIGENT HEAT STAGING SELECT
(ACTIVE ON 2S MODELS ONLY)
This switch converts a 2-speed heat pump thermostat with 1 stage
of auxiliary heat into a 1-speed heat pump thermostat with 3 stages
of auxiliary heat for comfortable leaving air temperature. It
requires selected heaters with 2:1 ratio element sizes plus FK, FV
fan coil. Refer to variable-speed fan coil literature for details.
TO SET:
OFF—for normal 2-speed operation. This is factory default.
ON—for intelligent 3-stage heat with FK, FV fan coil.
III. INSTALL THERMOSTAT
WARNING: Before installing thermostat, turn off all
power to unit. There may be more than 1 power disconnect. Electrical shock can cause personal injury or death.
1. Turn OFF all power to unit.
2. If an existing thermostat is being replaced:
a. Remove existing thermostat from wall.
b. Disconnect wires from existing thermostat, 1 at a time.
Be careful not to allow wires to fall back into the wall.
c. As each wire is disconnected, record wire color and
terminal marking.
d. Discard or recycle old thermostat.
NOTE: Mercury is a hazardous waste and MUST be disposed of
properly.
3. Open thermostat rear door (mounting base) to expose
mounting holes. The base can be removed to simplify
mounting. Snap apart carefully at hinge to separate mounting base from remainder of thermostat.
4. Route thermostat wires through large hole in mounting
base. Level mounting base against wall (for aesthetic value
only—thermostat need not be leveled for proper operation)
and mark wall through 2 mounting holes.
5. Drill two 3/16-in. mounting holes in wall where marked.
6. Secure mounting base to wall with 2 screws and anchors
provided, (additional anchoring holes available for more
secure mounting if needed) making sure all wires extend
through hole in mounting base.
7. Adjust length and routing of each wire to reach proper
terminal and connector block on mounting base with 1/4 in.
of extra wire. Strip only 1/4 in. of insulation from each wire
to prevent adjacent wires from shorting together when
connected.
8. Match and connect equipment wires to proper terminals of
the connector blocks. (See Table 1, and Fig. 2 through 24.)
Both R and C must be connected for proper thermostat
operation.
CAUTION: Improper wiring or installation may damage
the thermostat. Check to make sure wiring is correct
before proceeding with installation or turning on unit.
9. Push any excess wire into wall and against mounting base.
Seal hole in wall to prevent air leaks. Leaks can affect
operation.
10. Snap hinge back together.
11. Close thermostat assembly making sure pins on back of
circuit board align with sockets in connector.
12. Turn ON power to unit.
—2—
→ TABLE 1—MODEL SELECTION AND WIRING DIAGRAM CHART
INDOOR
UNIT
1-Stage
Furnace
2-Stage
Furnace
Typical Fan Coil
Variable-Speed
(FK, FV) Fan Coil
On power up, all display segments will light for 5 sec. For the next
→
Model AC
See Fig. 3
Model AC
See Fig. 5
Model AC
See Fig. 15
AIR CONDITIONER HEAT PUMP
1 Speed 2 Speed 1 Speed 2 Speed
Model AC
See Fig. 2
See Fig. 4
See Fig. 6
See Fig. 16
5 sec, a 2-digit code appears on large display which identifies
thermostat configuration:
1. AC—for 1-speed air conditioner
2. HP—for 1-speed heat pump
3. A2—for 2-speed air conditioner
4. H2—for 2-speed heat pump
5. HS—for intelligent heat staging with FK, FV Fan Coil and
1-speed heat pump
When this identifier disappears, normal operation begins. The
MODE control should be set to OFF and FAN control to AUTO,
so equipment does not start until further configuration and checkout is completed.
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IV. SET THERMOSTAT CONFIGURATION
Configuration options, like DIP switch settings, are intended to be
selected at installation and normally are not modified by the
homeowner. These options are not discussed in the Homeowner’s
Manual and therefore must be made as part of the installation. A
special procedure allows entry into the configuration mode. While
in configuration mode, 7 selections can be made. A description of
each of these and how to use the configuration mode follows.
A. Configuration Options — Summary:
Option 01—Anticipator adjustment
Option 02—Clean filter timer adjustment
Option 03—Fahrenheit or Celsius operation
Option 04—Enable fan (G) ON with any heat (W)
Option 05—07—Not applicable
Option 08—Auxiliary heat lockout temperature adjustment
Option 09—12—Not applicable
Option 13—Room temperature offset adjustment
Option 14—Not applicable
Option 15—Enable AUTO mode
B. To Enter Configuration Mode:
Press and hold FAN button for approximately 10 sec until COOL
set point display indicates a flashing 01. The thermostat is now in
configuration mode. It will automatically exit this mode if no
button is pressed for 3 minutes. Pressing END button will exit
configuration mode immediately.
C. While in Configuration Mode:
The upper small (COOL set point) display indicates selected
option number and large display indicates selection made within
that option. One of these will be flashing. The up and down buttons
are used both to move between available options and to make
selection for each option. When option number (small display) is
flashing, up and down buttons adjust it, moving between available
option numbers. After desired option number has been selected,
press SET TIME/TEMP button once. The large display will now
flash, indicating that up and down buttons now control available
choices within that option. Each press of SET TIME/TEMP button
switches between available option (small display) and available
selections within each option (large display).
Model HP
Model HP
Model HP
Model 2S
See Fig. 8
Model 2S
See Fig. 9
Model 2S
See Fig. 10
Model 2S
See Fig. 17
Requires Dual Fuel
Thermostat
Requires Dual Fuel
Thermostat
Model HP
See Fig. 7
Model 2S
See Fig. 14
Model 2S
See Fig. 11
Model 2S
See Fig. 12
Model 2S
See Fig. 13
Model 2S
See Fig. 18
D. Configuration Options — Selection:
OPTION 1—ANTICIPATOR ADJUSTMENT
This adjustment controls sensitivity and cycle rate of thermostat.
Higher numbers decrease sensitivity and slow cycle rate. Lower
numbers increase sensitivity and cycle rate. However, a limiting
feature will not allow more than 4 cycles per hr, regardless of
setting. Anticipator values can range from 1 to 9. Factory default
is 3. This default setting will provide optimum performance in
nearly all installations. Try it first. Do not change setting unless
there is evidence of the need to do so.
Unlike conventional anticipators, this setting is not determined by
current draw. There is no need to measure, know, or compensate
for current draw. There is also no droop with this thermostat.
Regardless of setting and number of stages, both heating and
cooling will control to their respective set points.
TO ADJUST:
1. Enter configuration mode if not already there. See above.
The upper small (COOL set point) display will be flashing
01. If not, use up and down buttons to move it to 01.
2. Press SET TIME/TEMP button once to flash current
selection of 1, 2, 3, 4, 5, 6, 7, 8, or 9 on large display.
Factory default is 3.
3. Use up and down buttons to move between available
choices.
4. Press SET TIME/TEMP button again to flash upper small
display for selection of another option, or press END to exit
configuration mode.
OPTION 2—CLEAN FILTER TIMER
Select hours of blower operation (heating, cooling, or fan) before
CLEAN FILTER icon is displayed. With OFF selected, icon will
never come on, disabling this feature. Time selection can range
from 400 to 3600 hr by selecting numbers 1 through 9. (Time is
400 X number selected.) Factory default is 2 (800 hr). Recommended selections are: disposable filter—400 to 800 hr, media
filter—1200 to 1600 hr, or electronic air cleaner—1600 to 2400 hr
of blower operation.
TO SELECT OR ADJUST:
1. Enter configuration mode if not already there. See above.
Use up and down buttons to make small (now flashing)
display indicate 02.
2. Press SET TIME/TEMP button once to flash the current
selection of OF, 1, 2, 3, 4, 5, 6, 7, 8, or 9 on large display.
Factory default is 2.
3. Use up and down buttons to move between available
choices.
4. Press SET TIME/TEMP button again to flash upper small
display for selection of another option, or press END to exit
configuration mode.
OPTION 3—FAHRENHEIT OR CELSIUS OPERATION
Select between Fahrenheit and Celsius operation. Factory default
is Fahrenheit.
TO SELECT OR ADJUST:
—3—
1. Enter configuration mode if not already there. See above.
Use up and down buttons to make small (now flashing)
display indicate 03.
2. Press SET TIME/TEMP button once to flash current
selection of F or C. Factory default is F.
3. Use up and down buttons to move between F and C on large
display.
4. Press SET TIME/TEMP button again to flash upper small
display for selection of another option, or press END to exit
configuration mode.
OPTION 4—ENABLE FAN (G) ON WITH ANY HEAT (W)
This selection determines whether the G (fan) output is to be on or
off when any W (furnace or strip heat) output is ON. Most fan coils
manage their own blowers and do not require a separate G signal.
For these applications, select OF (off). Some auxiliary heaters
require a separate G signal to turn on the blower. In this case,
select ON. Factory default is OF.
TO SELECT:
1. Enter configuration mode if not already there. See above.
Use up and down buttons to make small (now flashing)
display indicate 04.
2. Press SET TIME/TEMP button once to flash the currect
selection of OF or ON. Factory default is OF.
3. Use up and down buttons to move between OF and ON on
large display.
4. Press SET TIME/TEMP button again to flash upper small
display for selection of another option, or press END to exit
configuration mode.
OPTION 8—AUXILIARY HEAT LOCKOUT TEMPERATURE
Present in heat pump and 2-speed models only when configured as
a heat pump. Outdoor temperature sensor must be attached. This
option allows selection of an outdoor temperature of 5 through
55°F in 5° steps (or equivalent values in C), or OF (off). Auxiliary
heat is prevented from operating for outdoor temperatures above
the selected temperature. If OF (off) is selected, auxiliary heat is
allowed at all outdoor temperatures. If selected, emergency heat
(EHEAT) overrides this feature. Factory default is OF.
TO SELECT:
1. Enter configuration mode if not already there. See above.
Use up and down buttons to make small (now flashing)
display indicate 08.
2. Press SET TIME/TEMP button once to flash large display.
3. Use up or down buttons to move between OF, 5, 10, 15, 20,
25, 30, 35, 40, 45, 50, or 55 on large display. Factory
default is OF.
4. Press SET TIME/TEMP button again to flash upper small
display for selection of another option, or press END to exit
configuration mode.
OPTION 13—ROOM TEMPERATURE OFFSET ADJUST
This option allows calibration (or deliberate miscalibration) of
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 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. This
adjusted value will be used as actual temperature for both display
and control action. For example, if 2 is selected, 72°F actual will
read 74°F. If set point is 72°F, the room will control to an actual
temperature of 70°F which will be displayed and acted upon as if
it were 72°F. The effect is that a positive number selection will
make the room temperature lower and vice versa. The thermostat
is calibrated within an accuracy of plus or minus 1° when shipped
from the factory, so this adjustment will provide the best accuracy
when set to 0.
TO SELECT:
1. Enter configuration mode if not already there. See above.
Use up and down buttons to make small (now flashing)
display indicate 13.
2. Press SET TIME/TEMP button once to flash large display.
3. Use up or down buttons to move between -5, -4, -3, -2, -1,
0, 1, 2, 3, 4, or 5 on large display. Factory default is 0.
4. Press SET TIME/TEMP button again to flash upper small
display for selection of another option, or press END to exit
configuration mode.
OPTION 15—ENABLE AUTO MODE
This option allows the installer to enable or disable AUTO mode
(automatic changeover between heat and cool). When disabled,
AUTO icon does not appear when successive presses of MODE
button are used to move between OFF, HEAT, COOL, and
EHEAT (in heat pump systems). Factory default is ON (AUTO
enabled).
TO SELECT:
1. Enter configuration mode if not already there. See above.
Use up and down buttons to make small (now flashing)
display indicate 15.
2. Press SET TIME/TEMP button once to flash large display.
3. Use up and down buttons to move between OF and ON on
large display. Factory default is ON (AUTO enabled).
4. Press SET TIME/TEMP button again to flash upper small
display for selection of another option, or press END to exit
configuration mode.
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V. CHECK THERMOSTAT OPERATION
Before doing the checkout, press HOLD button to turn on HOLD
icon, locking thermostat in hold mode. This will assure set points
don’t change during the checkout. Outputs for each stage of
operation are listed in Table 2. In the table, the actual use of each
terminal is underlined for terminals having double use.
TO TEST THE FAN:
1. Press FAN button. The fan ON icon and the G output will
go on within a few seconds, causing fan to operate.
2. Pressing FAN button again will turn off the G output and
turn off fan AUTO icon.
TO TEST COOLING:
Press MODE button until COOL icon under it turns on. Press
down button until cool set point (upper right 2 digit display with
COOL now flashing under it) is 2° or 3° below room temperature.
This will create a cooling demand. A small triangle to the left of
this COOL icon will flash or come on continually. Flashing means
the equipment is going to turn on but is presently being held off by
a system timer. (See Operational Information for timer descriptions.) Defeat the timer by pressing INCREASE TEMPERATURE
button (up and FAN buttons together). This will make the triangle
stay on and turn Cool Stage 1 on. For actual outputs, refer to Table
2, making sure the correct row from the table is selected. To turn
off, raise cooling set point above the room temperature. Cool Stage
1 and the triangle will turn off within a few seconds.
If system has 2 cooling stages, it will start on Cool Stage 1 and
proceed to Cool Stage 2, 15 minutes later due to a staging timer
which requires 15 minutes between successive stages. The INCREASE TEMPERATURE button (up and FAN buttons) cannot
be used to defeat this timer. This timer can be defeated by reducing
the set point to more than 5° below room temperature, bringing on
a Cool Stage 2 demand within 5 seconds. Remember: 2 stage
cooling units often have a 1 minute off time between lo and high,
so the thermostat’s demand will not show immediately as a change
in the outdoor unit. It will show immediately as an increase in the
indoor fan speed.
—4—
TO TEST HEATING:
Press MODE button until HEAT icon under it turns on. Press up
button until HEAT set point (LOWER right 2 digit display with
HEAT now flashing under it) is 2° or 3° (not more) above room
temperature. This will create a Heat Stage 1 demand. A small
triangle to the left of this HEAT icon will flash or come on
continually. Flashing means the equipment is going to turn on but
is presently being held off by a system timer. (See Operational
Information for timer descriptions.) Defeat timer by pressing
INCREASE TEMPERATURE button (up and FAN buttons together). This will make the triangle stay on and turn on Heat Stage
1. To turn off, reduce heating set point below room temperature.
The heating and the triangle will turn off within a few seconds.
If the system has multiple heat stages, it will start on Heat Stage 1
and proceed to Heat Stage 2, 15 minutes later due to a staging
timer which requires 15 minutes between successive stages. The
INCREASE TEMPERATURE button (up and FAN buttons)
cannot be used to defeat this timer. If set point is raised more than
5° above room temperature, the staging timer is defeated and the
thermostat will call for higher stages within 5 sec. Use this method
if there are only 2 stages of heat. If more than 2 stages of heat are
available, do not use this method because once the demand
exceeds 5°, the thermostat may jump to the highest stage. With
more than 2 stages available, let the timer advance one stage every
15 minutes.
TO TEST EMERGENCY HEAT (heat pump systems only):
To test, press MODE button until EHEAT icon turns on. This will
allow operation of auxiliary heat only. Raising set point above
room temperature will turn on the first stage of auxiliary heating
(W/W1). Raising set point more than 5° above room temperature
will advance to full heat, if it is available (O/W2 or Y1/W2 will
come on—see Table 2). Reducing set point below room temperature will turn all heat off.
→
VI. FINAL SETTINGS
1. Assuming the system is to be left in operation after the
installation is complete, use MODE button to select between HEAT, COOL, EHEAT, or AUTO to provide the
desired operation of heating, cooling, or both.
2. The default set points and programmed schedule conform to
the Energy Star requirements of the U.S. Department of
Energy for both heating and cooling. These provide energy
saving temperature settings.
3. Turn on HOLD if fixed set points are to be used. If the
programmed schedule is to be used, make sure the HOLD
icon is off.
4. For further information on temperature selection and programming, refer to Homeowner’s Manual.
5. If AUTO mode is to be used, be sure both heat and cool set
points are properly adjusted.
6. The FAN button may be used to select between AUTO (fan
on only with equipment) and FAN (fan on continuously) fan
modes.
→
VII. CHECKLIST
1. Put away tools and instruments, and clean up debris.
2. Review Homeowner’s Guide with owner.
3. Leave literature packet with owner.
4. Fill out and return survey card.
—5—
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