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TCSNAC01, TCSNHP01  
Non--Programmable Thermostat  
Installation Instructions  
Models  
There are 2 different models. The 5th and 6th letters of the part  
number indicate the model. These 2 letters also 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.  
Use each only for its intended purpose. See Table 1.  
INSTALLATION  
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.  
A08147  
NOTE: Read the entire instruction manual before starting the  
installation.  
Thermostat should NOT be mounted:  
S Close to a window, on an outside wall, or next to a door leading  
to the outside.  
SAFETY CONSIDERATIONS  
S Exposed to direct light and heat from a lamp, sun, fireplace, or  
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.  
other temperature -- radiating object which may cause a false  
reading.  
S Close to or in direct airflow from supply registers and return -- air  
grilles.  
Recognize safety information. This is the safety -- alert symbol  
.
S In areas with poor air circulation, such as behind a door or in an  
When you see this symbol on the equipment and in the instruction  
manual, be alert to the potential for personal injury.  
alcove.  
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.  
Select Model  
AC Model  
(1 -- stage cool, 1 -- stage heat) is to be used for single stage heating  
and/or cooling applications only.  
HP Model  
(
1 -- stage cool, 2 -- stage heat) can be used with a single -- speed heat  
pump (HP), or an air conditioner (AC) with a 2 -- stage furnace or  
fan coil. Software Option 5 selects HP/AC operation. This  
thermostat comes configured from the factory as a heat pump  
thermostat. Select AC in software Option 5 for AC operation.  
Power  
Note that all thermostats are dual powered where batteries can be  
installed or in the presence of R and C (24vac) are not required.  
Two AA batteries are furnished with the product.  
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Table 1 – Model Selection and Wiring Diagram Chart  
AIR CONDITIONER  
HEAT PUMP  
1 Speed  
OUTDOOR UNIT  
1
Speed  
1
2
--- Stage Furnace  
--- Stage Furnace  
Model AC See Fig.  
---  
---  
Model AC See Fig.  
Model AC See Fig.  
Model HP See Fig.  
Model HP See Fig.  
Typical Fan Coil  
Model HP See Fig.  
Va r ia b le --- Sp e e d Fa n C o il ( F K 4 D,  
FV4, 40FK)  
Model AC See Fig.  
Model HP See Fig.  
Model HP See Fig.  
Install Thermostat  
!
CAUTION  
!
WARNING  
ELECTRICAL OPERATION HAZARD  
ELECTRICAL OPERATION HAZARD  
Failure to follow this caution may result in equipment damage  
or improper operation.  
Failure to follow this warning could result in personal injury  
or death.  
Improper wiring or installation may damage the thermostat  
Check to make sure wiring is correct before proceeding with  
installation or turning on unit.  
Before installing, modifying, or servicing system, main  
electrical disconnect switch must be in the OFF position. There  
may be more than 1 disconnect switch. Lock out and tag  
switch with a suitable warning label.  
9
. Push any excess wire into wall and against mounting base.  
Seal hole in wall to prevent air leaks. Leaks can affect  
operation.  
1
2
. Turn OFF all power to unit.  
. If an existing thermostat is being replaced:  
a. Remove existing thermostat from wall.  
10. Snap case back together.  
11. Close thermostat assembly making sure pins on back of  
circuit board align with sockets in connector.  
b. Disconnect wires from existing thermostat, 1 at a time.  
Be careful not to allow wires to fall back into the wall.  
12. Turn ON power to unit.  
c. As each wire is disconnected, record wire color and  
terminal marking.  
NOTE: If a common wire has not been connected, two AA  
batteries must be used to power the thermostat.  
d. Discard or recycle old thermostat.  
NOTE: Mercury is a hazardous waste and MUST be disposed of  
Make sure the customer is informed about changing the batteries  
every 12 months, if a common wire is not available.  
properly.  
If a common wire is connected, then batteries are not needed for  
any reason. Batteries may be installed if desired but the thermostat  
will not draw power from them.  
3
. Open thermostat (mounting base) to expose mounting  
holes. The base can be removed to simplify mounting. Snap  
apart carefully to separate mounting base from remainder of  
thermostat.  
Set Thermostat Configuration  
Configuration options are intended to be selected at installation and  
are normally not modified by the home owner. These options are  
not discussed in the Homeowner’s Guide and therefore must be  
made as part of the installation. A special procedure allows entry  
into the configuration mode. The thermostat will automatically exit  
this mode if no button is pressed for 3 minutes. While in the  
configuration mode, up to 14 option choices can be made:  
NOTE: If thermostat will not separate, insert a small screwdriver  
into top slots for ease of opening.  
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
6
. Drill two 3/16” (5mm) mounting holes in wall where  
marked.  
Option 01: Anticipator setting  
Option 02: Clean filter setting  
Option 03: Fahrenheit or Celsius selection  
Option 04: Enable fan (G) on with W output  
Option 05: HP / AC  
. Secure mounting base to wall with 2 anchors and screws  
provided, (additional anchoring holes available for more se-  
cure mounting if needed) making sure all wires extend  
through hole in mounting base.  
. Adjust length and routing of each wire to reach proper ter-  
minal and connector block on mounting base with 1/4”  
Option 07: Enable zoning  
7
8
Option 10: O (reversing valve) ON with Heat or Cool (present on  
Heat Pump models only)  
(6mm) of extra wire. Strip only 1/4” (6mm) of insulation  
from each wire to prevent adjacent wires from shorting  
together when connected.  
Option 13: Room temperature offset adjustment  
Option 15: Enable AUTO mode  
Option 18: Backlight Configuration  
Option 19: Equipment Present  
. Match and connect equipment wires to proper terminals of  
the connector blocks. (See Table 1.)  
Option 21: Keypad Lockout  
An explanation for each of these and how to enter the  
configuration mode follows.  
2
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To enter the configuration mode:  
To enter Configuration Mode, hold the FAN button down for  
approximately 15 seconds. After the 15 second period, Option  
OPTION 03 -- FAHRENHEIT/CELSIUS SELECTION  
This option selects Fahrenheit or Celsius operation.  
To Select:  
“01” will appear in the display and the SERVICE icon will be  
1
2
. Enter configuration mode (if not already there).  
turned on.  
. Use up and down buttons to display Option 03. The SET  
icon should be off.  
NOTE: If the FAN button is pressed again or if no button is  
pressed for 3 minutes, the thermostat will exit the configuration  
mode and return to normal operation. To reenter the configuration  
mode, the FAN button must be pressed and held for 15 seconds  
again.  
3
4
. Press MODE button once. The SET icon will come on. The  
display now shows Option 03 setting.  
. Use up and down buttons to move between the available  
Option 03 choices of F (Fahrenheit) or C (Celsius). Factory  
default is F.  
While in configuration mode:  
The display is used to show both the option number and the  
selection choice within that option.  
5
6
. Press MODE button again to return to Option 03. The SET  
icon will now be off.  
OPTION 01 -- ANTICIPATOR ADJUSTMENT  
. Use up and down buttons to select another Option, or press  
FAN button to exit configuration mode.  
This adjustment controls the sensitivity and cycle rate of the  
thermostat. Higher numbers decrease the sensitivity and slow the  
cycle rate. Lower numbers increase sensitivity and increase cycle  
rate. However, a limiting feature will not allow more than 6  
equipment cycles per hour, regardless of setting. Values can range  
from 1 to 9. Factory default setting is 3. This default selection will  
provide optimum performance in nearly all installations. Try it  
first. Do not change setting unless there is evidence of need to do  
so.  
Unlike conventional anticipators, this setting is not to be  
determined by current draw. There is no need to measure, know, or  
compensate for current. There is also no droop with this  
thermostat, regardless of anticipator setting. This adjustment  
controls only sensitivity and cycle rate up to the maximum of 6  
cycles per hour.  
OPTION 04 -- G (FAN) ON WITH W OUTPUT  
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  
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 to turn on the  
blower. In this case, select On. Factory default is OF (off).  
To Select:  
1. Enter configuration mode (if not already there).  
2. Use up and down buttons to display Option 04. The SET  
icon should be off.  
3
. Press MODE button once. The SET icon will come on. The  
display now shows Option 04 setting.  
To Adjust:  
4
. Use up and down buttons to move between available  
Option 04 choices of ON or OF. Factory default is OF.  
1
2
. Enter configuration mode (if not already there).  
. Use up and down buttons to display Option 01. The SET  
icon should be off.  
5. Press MODE button again to return to Option 04. The SET  
icon will now be off.  
3
4
5
6
. Press MODE button once. The SET icon will come on. The  
display now shows Option 01 setting.  
. Use up and down buttons to move between the available  
Option 01 values of 1 to 9. Factory default is 3.  
. Press MODE button again to return to Option 01. The SET  
icon will now be off.  
. Use up and down buttons to select another Option, or press  
FAN button to exit configuration mode.  
6. Use up and down buttons to select another Option, or press  
FAN button to exit configuration mode.  
OPTION 05 -- HP / AC CONFIGURATION  
This configuration is available on HP models only. Selecting AC  
allows the installer to use a HP thermostat in an air conditioner  
application.  
To Select:  
1
2
. Enter configuration mode (if not already there).  
. Use up and down buttons to display Option 05. The SET  
icon should be off.  
OPTION 02 -- CLEAN FILTER TIMER  
This option selects the number of hours of blower operation  
heating, cooling, or fan) before SERVICE FILTER icon is  
(
3
4
5
6
. Press MODE button once. The SET icon will come on. The  
display now shows Option 05 setting.  
displayed. With OF selected, the icon will never come on,  
disabling this feature. Time selection can be from 400 to 3600  
hours by selecting numbers 1 through 9. (Time is 400 X number  
selected.) Factory default is 2 (800 hours). Recommended  
selections are: disposable filter 800 hr, media filter 1200 to 1600  
hr, or electronic air cleaner 1600 to 2400 hr of blower operation.